Created by Paweł 'Srebrny' Srebniak / @srebrny_dev
Who I am
3 years experience as backend developer
I use advenced directory structure
See more at best practices.
inventories/
production/
hosts # inventory file for production servers
group_vars/
host_vars/
...
library/
filter_plugins/
roles/
common/
application/
...
deploy_front.yml
hosts # inventory file for production servers
group_vars/
group1 # here we assign variables to particular groups
group2 # ""
host_vars/
hostname1 # if systems need specific variables, put them here
hostname2 # ""
library required for custom modules, eg. do-cli, openstack_ext
library/ # (optional)
Put here custom filter for filter inventories. see: do-json-inventory.py
filter_plugins/ # if any custom filter plugins, put them here (optional)
Every roles goes into new directory.
roles/
common/
webtier/
monitoring/
fooapp/
Playbooks names should describe what playbook do!
site.yml
webservers.yml
dbservers.yml
deploy_tools.yml
secure_new_host.yml
deploy_tools.yml
update_balancer_nodes.yml
tasks/
main.yml # tasks file can include smaller files if warranted
handlers/
main.yml # handlers file notification, restart nginx
templates/ # files for use with the template resource
files/ # place here files for uploads
vars/
main.yml # variables associated with this role
defaults/
main.yml # default lower priority variables
meta/
main.yml # role dependencies
library/ # roles can also include custom modules
lookup_plugins/ # or other types of plugins
Before we start using variables it’s important to know what are valid variable names.
Variable names should be letters, numbers, and underscores. Variables should always start with a letter.
foo-port, foo port, foo.port, 12foo_port, as
foo_port, field1, lbs_balancer_ports
Ansible works against multiple systems in your infrastructure at the same time.
Inventories is a standard ini file!
Hosts can be grouped
mail.example.com
[webservers]
foo.example.com
bar.example.com
[dbservers]
one.example.com
two.example.com
three.example.com
Specific configuration like port, host name or ip
jumper ansible_port=5555 ansible_host=<IP_ADDRESS>
Ta dam!
whp[01:50].jupiter.pycode.biz
or
dbs[01:50].node-[a:f].akka.pycode.biz
Variables can also be applied to an entire group at once:
[atlanta]
host1
host2
[atlanta:vars]
ntp_server=ntp.akka.pycode.biz
proxy=proxy.akka.pycode.biz
It is also possible to make groups of groups using the :children suffix you can apply variables using :vars:
[atlanta]
host1
host2
[raleigh]
host2
host3
It is also possible to make groups of groups using the :children suffix you can apply variables using :vars:
[southeast:children]
atlanta
raleigh
It is also possible to make groups of groups using the :children suffix you can apply variables using :vars:
[southeast:vars]
some_server=whp0.node-a.akka.pycode.biz
halon_system_timeout=30
self_destruct_countdown=60
escape_pods=2
[usa:children]
southeast
northeast
Just run command without playbook
Use module ping on all hosts as user bruce
$ ansible all -m ping -u bruce
Transfer a file directly to many servers
$ ansible whp-all.node-a.akka.pycode.biz \
$ -m copy -a "src=/etc/hosts dest=/tmp/hosts"
# part of hosts
[whp-all.node-a.akka.pycode.biz]
whp[01:50].node-[a:f].akka.pycode.biz
Transfer a file directly to many servers
$ ansible whp-all.node-a.akka.pycode.biz \
$ -m copy -a "src=/etc/hosts dest=/tmp/hosts"
# part of hosts
[whp-all.node-a.akka.pycode.biz]
whp[01:50].node-[a:f].akka.pycode.biz
Transfer a file directly to many servers
$ ansible whp-all.jupiter.pycode.biz -m yum \
$ -a "name=nginx state=latest"
# part of hosts
[whp-all.jupiter.pycode.biz]
whp[01:50].jupiter.pycode.biz
Copying files in playbook
Generate proxy config for all host in group proxy.node-a.akka.pycode.biz
- name: Update nginx configuration
template:
src: "roles/nginx_stream/templates/nginx.conf.j2"
dest: "/etc/nginx/sites-available/{{inventory_hostname}}"
owner: "{{ AKKA_USER_NAME }}"
group: "{{ AKKA_GROUP_NAME }}"
mode: '0600'
become: yes
become_user: "{{ AKKA_USER_NAME }}"
become_method: "sudo"
tags: [nginx_proxy]
Transfer a file directly to many servers
- name: Copying file into server
copy:
src: "roles/open_stack/templates/rootwrap.conf.j2"
dest: /etc/cinder/rootwrap.conf
owner: foo
group: foo
mode: "u=rw,g=r,o=r"
tags:
- openstack_blockstorage
[DEFAULT]
rootwrap_config=/etc/cinder/rootwrap.conf
sql_connection =<EMAIL_ADDRESS>api_paste_config = /etc/cinder/api-paste.ini
Copy & Template
If you have a large playbook it may become useful to be able to run a specific part of the configuration without running the whole playbook.
Set two tags packages and configuration
tasks:
- yum: name={{ item }} state=installed
with_items:
- httpd
- memcached
tags:
- packages
- template: src=templates/src.j2 dest=/etc/foo.conf
tags:
- configuration
We can run specific playbook with only job tagged as configuration and packages!
$ ansible-playbook deploy_server_proxy.yml \
$ --tags "configuration,packages"
We can skip tag!
$ ansible-playbook deploy_server_proxy.yml
$ --skip-tags "notification"
Add role tag
roles:
- { role: webserver, port: 5000, tags: [ 'web', 'foo' ] }
Playbook repository
How install a new roles
$ ansible-galaxy install username.rolename
Install nginx role from user jdauphant
$ ansible-galaxy install jdauphant.nginx


'If you could see me as he goes down the blindside without support...I'm shouting... NO! Followed by... YES!'
by By Online EditorsUlster head coach Dan McFarland admitted John Cooney’s match-winning try in the 18-13 success against Clermont Auvergne left him with his heart in his mouth.
Cooney’s 62nd-minute score, when he kicked through near the Clermont line and then controlled the ball to touch down, ensured that Ulster have two wins from two to lead Pool Three of the Heineken Champions Cup.
“John has got lots of tricks in his bag and he is an incredibly skilful player and it was a great bit of play from him,” said McFarland.
The Season: Hamilton Boys High School – Episode 2
“John told me that he has been practising that move for years, when he breaks blind and chips, but that he has never actually done it in a game. So he pulls it out of the bag in a Champions Cup game!
“When I was watching him from the box there was a big shout of ‘No’ followed by a big shout of ‘Yes!’.”
Cooney’s try put Ulster 18-6 in front in what was a tight game, with Clermont’s late penalty try bringing the French side a losing bonus point to leave them two points behind the Irish province.
“Any time in the Champions Cup when you play a French giant and you manage to win the game you have to be happy with that,” stated the Ulster coach.
“There was a lot to be pleased about in that performance, particularly with the way we limited their opportunities whenever they had the ball in hand.
 I felt that we did that.
“I thought we showed some real attacking glimpses of what we can do in attack. If we had been a little more clinical right at the end we would have had two more tries and they wouldn’t have got a bonus point. But it was pleasing.”
Jordi Murphy scored Ulster’s other try, converted by Cooney who also kicked two penalties – as did Clermont scrum-half Greig Laidlaw.
Though disappointed at losing the game, Laidlaw was still pleased to come away with a bonus point from the clash.
“In a tournament like the Champions Cup it is important to pick up as many points as you can,” said the Scot.
“We knew it would be tough coming here and obviously we wanted to win, but to come away with a bonus point keeps us well in the group.”
– Press Association
In other news:


dput(1) dput(1) NAME dput - package upload tool for Debian SYNTAX dput [options] [host] package.changes ... DESCRIPTION This is a tool for uploading Debian packages into the archive. You may specify to which host it should upload the file by passing it an host argument. If omitted, dput uses the host specified by default_host (or, historically default_host_non-us) configuration option. Also you have to pass the program one or more name of package.changes files and then they will be sequentially uploaded. This program will then upload the package for you into the archive, using a selected upload method. Currently dput supports ftp, scp, rsync, http, https, and local. The method scripts have been split from the main script so it is easy to add new methods. Look in /usr/share/dput/ for examples. Should something go wrong with your upload to destinations using the Debian upload queue daemon (e.g. ftp-master), you can remove files from the upload queue with dcut(1). OPTIONS -c, --config - define a config file to use. -d, --debug - activate debugging mode, helpful if bugs occur. -D, --dinstall - do a dry run of dinstall after the upload. -f, --force - force an upload of an already uploaded package. -h, --help - print help information and exit. -H, --host-list - print the lists of hosts that dput knows about. -l, --lintian - run lintian before the upload. -U, --no-upload-log - do not write a .upload log file after uploading. -o, --check-only - check only the package and do not upload. -p, --print - print the configuration that dput is using. -P, --passive - use passive ftp instead of active. Note that passive ftp is the default unless specified otherwise in the configuration file. -s, --simulate - simulate an upload only. -u, --unchecked - don't check GnuPG signature on the changes file. -e, --delayed - Upload to a DELAYED queue, rather than the usual Incom‐ ing. This takes an argument from 0 to 15. Note that a delay of 0 is dif‐ ferent from no delay at all. -v, --version - print version information and exit. -V, --check-version - check if the user has already installed and tested the package before putting it into the archive. ENVIRONMENT This program doesn't depend on any environment variables. But if the variable USER is set, it will be used. LICENSE This program is distributed under the terms of the GPL. BUGS Please send bug reports to the author. FILES /etc/dput.cf global dput configuration file ~/.dput.cf peruser dput configuration file SEE ALSO dput.cf(5) dcut(1) /usr/share/doc/dput /usr/share/dput AUTHOR dput was written Christian Kurz. The current maintainer is Thomas Viehmann<EMAIL_ADDRESS>Many other people have contributed to this code. See the Thanks file. COMMENTS The author does appreciate comments and suggestions from you. October 5, 2001 dput(1)


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If you were to peruse my collection of nearly 300 CDs you'd find several titles by The Specials, Isaac Hayes, Elvis Costello, Marvin Gaye , U2 and I imagine the biggest question on your mind would be: "Do you own EVERYTHING by Prince?"- (nearly) If you looked a little further, you'd see that right in between those were also the greatest hits of The Carpenters, The BeeGees, Michael Jackson, and Burt Bacharach. I absolutely adore this music, and not out of a sense of irony, kitsch or trendiness. Before there was "retro" this was the music that permeated the airwave when I was a kid and I've never stopped loving it. There is no shame in my game. Now at this point I probably wouldn't let you look too much closer because you would no doubt stumble upon the CDs I don't beat my chest over. Discs featuring the song stylings of such luminaries as Kenny G, Yanni, Celine Dion and...(ugh) Michael Bolton. All I can say in my defense is: "They belong to my wife." I know, I know, the smart thing would've been to keep our collections separate but...well, she had this Tony!Toni!Tone! CD I really wanted to absorb- Oh well.
I imagine your big question now is: "How could you marry a woman with such awful taste in music?" I guess I just...waitaminnit! Is that REALLY you're next question? Man, you guys are shallow! For your information, ‘Oh cynical one', a marriage is based on mutual trust and having much more in common than something so trivial as musical tastes. For instance, my wife and I feel the exact same way about... ...uuuhh...um...uh...Jim Carrey!! Yeah, Jim Carrey, hah!
I was a big fan of Jim Carrey's back before he was on tv in THE DUCK FACTORY. He was doing stand up comedy which featured some decent jokes but what was amazing were his impressions- one in particular. He'd start by tapping his foot and without using his voice he'd perfectly imitate the cast of MY THREE SONS. Ernie, Chip, Uncle Charlie and even Fred MacMurray all by unhinging his jaw and contorting the muscles of his face. Nobody was more excited than me when turned up in the cast of IN LIVING COLOR. Finally, he was given a large enough venue to show the world how talented he was. And week after week he did. It eventually led to a hugely successful movie...Ah yes, the movies.
When Jim Carrey's film career began he and I had to "part ways". Though his movies made truckloads of money I found them to be too broad for my taste- and by ‘broad' I mean: Pretty damn stupid! (with sugar on it). THE MASK was originally a bitingly witty comic book series with a completely different tone than the flaccid movie adaption. I was unable to watch anymore than 20 minutes of DUMB & DUMBER. In an interview Carrey admitted , as I suspected, that ACE VENTURA 2 had no script. Everyday he'd arrive on the set and say to himself, "They're paying me$20 million. The cameras are rolling. Think of something funny! Think of something funny!" The only one I was able get any enjoyment out of was BATMAN FOREVER (in which he stole the show) and that couldn't really be considered ‘HIS' movie. Enter THE CABLE GUY.
THE CABLE GUY featured a plot with twists, a good script, a message (despite itself) and some good gags that didn't solely rely on his unfilled Ridlin prescription. Best of all, Carrey's chaotic energy was focused into playing a demented character with enough dimension to remind me of several people I knew in high school. Just as I'd declared the art of making good comedies dead, THE CABLE GUY served me up a hot crow sandwich (followed by dessert ala THE NUTTY PROFESSOR). Me and the missus liked it even better the second time. It also managed to bring lovers of dark comedies everywhere over to the Jim Carrey bandwagon. In short, THE CABLE GUY was successful in every way...except one, financially. Carrey's salary was $20 million while the movie only made $12 million. I'm not strong in math but I think that means it was a flop. According to entertainment reporters and media analysts, "The fans thought the movie was too dark! Carrey should forget drama and return to his old comedy!" Huh, imagine that. A ‘mandate' that a performer stick to schtick rather than expand himself as an artist. Go figger. I researched why this turn of events happened and was able to reach only one logical conclusion. As it turns out there are two phylum of Jim Carrey fan: 1) Those who liked THE CABLE GUY and (2) Morons ... Sorry. Let's say ‘mentally challenged'- and the ratio was nearly 6 to 1. Fortunately, Jim Carrey's next movie was LIAR!LAIAR!. That movie was both ‘stupid' and ‘smart' in the best possible way. It won back all of his old fans and held on to his new ones. His career was ‘saved'.
So, what does any of this have to do with THE TRUMAN SHOW? I'll explain that in a minute.
There's no need for me to tell you that THE TRUMAN SHOW is good, you've already heard that at least twenty times or more. You've probably also heard it compared to FORREST GUMP and that Jim Carrey does some Oscar-caliber dramatic acting. Hmmn...I would definitely say it's a GREAT movie but the other two?...I don't know. Rather than FORREST GUMP, the movies I would shelve it next to would be ROBOCOP, MAN BITES DOG and BRAZIL- three of the best written, well constructed, disturbing and nauseatingly cynical movies I've ever seen.
THE TRUMAN SHOW is the story of Truman Burbank, who at age 30 has not realized that his entire life has been broadcasted as a tv show. His entire environment is a city-sized, dome- shaped tv studio and all of his friends and loved ones are actors- who stop ever so often to hawk the sponsors products. While this all handled light-heartedly at first, as the story continues you find out more things that don't sit so well; Like the fact that Truman was actually adopted by a corporation from an unwed mother. They used intense trauma and manipulation to keep him from wanting to leave his ‘hometown'. Truman doesn't catch on that his world is artificial because, frankly, he's never had anything to compare it to. The worst thing about all of this is that the citizenry approve of it, not because it's a tv show...but because IT'S THE MOST POPULAR TV SHOW IN AMERICA!!
Like the three movies I mentioned earlier, I couldn't help but respect THE TRUMAN SHOW, despite feeling ill from the cynical distopia it presented. After the denial wore off I had to accept that it WAS our world, and closer than you think. I would refer you to the new trend in websites: A camera continously broadcasts the actions, no matter how mundane, of the site's host. Better still, look to Fox's POLICE SCARIEST CAR CHASES or the highly rated JERRY SPRINGER, especially before it became faux-fight night. Our voyeurism is out of the closet and is successfully integrating itself to our desire to be entertained. Exiting the movie I was reminded of how I felt the first time I saw Chuck Heston come upon the half buried Statue of Liberty in PLANET OF THE APES or discover that SOYLENT GREEN was made of people.
Just as lightning struck and knocked a rack of chemicals onto police scientist Barry Allen and transformed him into the fastest man alive, The Flash!, in a similar phenomenon, DEAD POETS SOCIETY director Peter Weir turned hyperactive, gonzo comedian Robin Williams into an Oscar nominated (eventually winning) dramatic actor. I'm sure you also know that a few months later, an identical accident turned Barry's nephew Wally into Kid Flash, with the same powers. THE TRUMAN SHOW is also directed by Peter Weir and it's star, hyperactive, gonzo comedian is...well, not quite Kid Flash.
Carrey's acting is definitely good, but he plays Truman as something of a 1950's goofball. It fits the story well and is very effective at keeping you off balance but it doesn't define his dramatic range at all. For that the best barometer still is DOING TIME ON MAPLE DRIVE.
If you've been paying attention you should have several questions on your mind right now: "What's gonna happen when the old fans and parents take their kids to see this movie?" "Dramatic and dark? Didn't they learn from THE CABLE GUY?" "How can this movie succeed?"....Thank you. Now, these are good questions.
Consider this: The movies I review I usually see 3 days to 2 weeks before their release date. THE TRUMAN SHOW I saw 2 MONTHS AGO and I'd been reading reviews a whole month before...alot of reviews!  They've learned from the past and are insuring that there's enough good word of mouth to make the populace ‘like' the picture before they even see it. Maybe the method isn't as crass or over-inflated as those used to hype GODZILLA, but it's still pure marketing and manipulation and I, for one, refuse to be a part of it... ....Well, okay, maybe this once... ....I honestly do think it's a Must-See movie... ....It's possibly the best movie you'll see this summer...and I realize that ain't saying much, but THE TRUMAN SHOW does... ...It speaks volumes
I'm sure my wife'll love it.
-MARTIN
--
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City Lights Fragrances International LTD, established in 1995 with its first perfume retail outlet in Aleppo, Syria. With
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very efficient services.
We are dedicated to work together with uncompromising ethics and integrity. We encourage our people to create, innovate, and to strive for the best always.
We aim to be a high-end innovative and creative fragrance organisation that caters to all categories of fragrance creation and develops a working partnership with our clients for a successful and everlasting business relationship.
As we pursue our journey, we are investing higher resources in our most promising opportunities – by category, brand and region.
We carefully decide where to allocate our resources to drive our momentum for the long term.
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- Contents
- Ness
- Model
You can include this library to your code file by typing the below code;
use Ness\Model
About Models #top
Model is a class which designed to help you with information in your database. We can call it 'Hand' of human body, because when you request a data they should bring information from database. Also when you say to a model to hold this information untill I put it to database, model classes should hold that information. All your model class files must be located in 'model' folder, Ness framework look this directory for autoloading a model file. You can read more about folder structure
Load Models #top
Load is a static method to locate and load a model.
Model::Load(string $prm_file);
| Load model when not autoloading | ||
| Return | Void | |
| Parameters | $prm_file String; File name of your model file. |
Example Model #top
This UserModel should be saved in app_folder/Application/Model/UserModel.php
class UserModel
{
public $name;
public $surname;
public $email;
public $password;
public $role;
public $registerdate;
public $__id;
public function Save()
{
//database codes...
}
public function Update()
{
//database codes...
}
public function Delete()
{
//database codes...
}
public function Show()
{
//database codes...
}
}


This past week was filled with JavaScript, a new language to me. It was fairly easy to work with but the thing I found to be the most confusing is that there are several items in JS that behave or look extremely similar to items in Ruby - but are not. One of those confusions was JavaScript Objects. They resemble Ruby Hashes, but aren't quite the same.
Objects in JavaScript are containers for named values. Such as:
var cat = {type: "domestic shorthair", color: "black and white", vaccinated: true};
The name:value pairs are called properties. The name (or key) is always a string. If you enter an integer as a key, JS will automatically convert it to a string. Methods are another named value that can be defined in an object. When methods are defined as part of an object, they are defined in properties as function definitions.
var cat = {type: "domestic shorthair", color: "black and white", vaccinated: true, ageHuman: 7, ageCat: function(){return cat.ageHuman * 7}};
Ruby Hashes act more like dictionaries - keys pointing to values. The keys in hashes can be any type - symbol, string, integer. Basically, anything that you want to point to a value can be used as a key. Hash pairs look similar to JavaScript name:value pairs.
Another difference is how items are accessed within a JS object vs. a Ruby hash.
JavaScript:
cat.type //returns "domestic shorthair", type is a string
Ruby:
cat["type"] # returns "domestic shorthair", where type is a string
cat[:type] # example where type is a symbol
Ruby hashes also have built-in methods, but JavaScript objects do not.
As my significant other recently advised, when learning a new language, take absolutely nothing for granted. Even though it may look alike and behave in a similar manner, there are nuances that we have to become familiar with and discover so that we can properly proceed with our code. JavaScript objects may look like Ruby hashes, but they honestly behave more like Ruby objects.


This chapter provides an overview of managed beans and explains how to write methods and properties of managed beans that are used by a JavaServer Faces application. This chapter also introduces the Bean Validation feature.
Chapter 10, "Using JavaServer Faces Technology in Web Pages" and Chapter 11, "Using Converters, Listeners, and Validators" show how to add components to a page and connect them to server-side objects by using component tags and core tags. These chapters also show how to provide additional functionality to the components through converters, listeners, and validators. Developing a JavaServer Faces application also involves the task of programming the server-side objects: managed beans, converters, event handlers, and validators.
The following topics are addressed here:
A typical JavaServer Faces application includes one or more managed beans, each of which can be associated with the components used in a particular page. This section introduces the basic concepts of creating, configuring, and using managed beans in an application.
A managed bean is created with a constructor with no arguments, a set of properties, and a set of methods that perform functions for a component. Each of the managed bean properties can be bound to one of the following:
A component value
A component instance
A converter instance
A listener instance
A validator instance
The most common functions that managed bean methods perform include the following:
Validating a component's data
Handling an event fired by a component
Performing processing to determine the next page to which the application must navigate
As with all JavaBeans components, a property consists of a private data field and a set of accessor methods, as shown by this code:
private Integer userNumber = null; ... public void setUserNumber(Integer user_number) { userNumber = user_number; } public Integer getUserNumber() { return userNumber; }
When bound to a component's value, a bean property can be any of the basic primitive and numeric types or any Java object type for which the application has access to an appropriate converter. For example, a property can be of type java.util.Date
if the application has access to a converter that can convert the Date
type to a String
and back again. See Writing Bean Properties for information on which types are accepted by which component tags.
When a bean property is bound to a component instance, the property's type must be the same as the component object. For example, if a javax.faces.component.UISelectBoolean
component is bound to the property, the property must accept and return a UISelectBoolean
object. Likewise, if the property is bound to a converter, validator, or listener instance, the property must be of the appropriate converter, validator, or listener type.
For more information on writing beans and their properties, see Writing Bean Properties.
To bind component values and objects to managed bean properties or to reference managed bean methods from component tags, page authors use the Expression Language syntax. As explained in Overview of the EL, the following are some of the features that the EL offers:
Deferred evaluation of expressions
The ability to use a value expression to both read and write data
Method expressions
Deferred evaluation of expressions is important because the JavaServer Faces lifecycle is split into several phases in which component event handling, data conversion and validation, and data propagation to external objects are all performed in an orderly fashion. The implementation must be able to delay the evaluation of expressions until the proper phase of the lifecycle has been reached. Therefore, the implementation's tag attributes always use deferred-evaluation syntax, which is distinguished by the #{}
delimiter.
To store data in external objects, almost all JavaServer Faces tag attributes use lvalue expressions, which are expressions that allow both getting and setting data on external objects.
Finally, some component tag attributes accept method expressions that reference methods that handle component events or validate or convert component data.
To illustrate a JavaServer Faces tag using the EL, the following tag references a method that validates user input:
<h:inputText id="inputGuess" value="#{userNumberBean.userNumber}" required="true" size="3" disabled="#{userNumberBean.number eq userNumberBean.userNumber ...}" validator="#{userNumberBean.validateNumberRange}"> </h:inputText>
This tag binds the inputGuess
component's value to the UserNumberBean.userNumber
managed bean property by using an lvalue expression. The tag uses a method expression to refer to the UserNumberBean.validateNumberRange
method, which performs validation of the component's local value. The local value is whatever the user types into the field corresponding to this tag. This method is invoked when the expression is evaluated.
Nearly all JavaServer Faces tag attributes accept value expressions. In addition to referencing bean properties, value expressions can reference lists, maps, arrays, implicit objects, and resource bundles.
Another use of value expressions is to bind a component instance to a managed bean property. A page author does this by referencing the property from the binding
attribute:
<h:outputLabel for="fanClub" rendered="false" binding="#{cashierBean.specialOfferText}"> value="#{bundle.DukeFanClub}"/> </h:outputLabel>
In addition to using expressions with the standard component tags, you can configure your custom component properties to accept expressions by creating javax.el.ValueExpression
or javax.el.MethodExpression
instances for them.
For information on the EL, see Chapter 9, "Expression Language".
For information on referencing managed bean methods from component tags, see Referencing a Managed Bean Method.
As explained in Managed Beans in JavaServer Faces Technology, a managed bean property can be bound to one of the following items:
A component value
A component instance
A converter implementation
A listener implementation
A validator implementation
These properties follow the conventions of JavaBeans components (also called beans). For more information on JavaBeans components, see the JavaBeans Tutorial at http://docs.oracle.com/javase/tutorial/javabeans/index.html
.
The component's tag binds the component's value to a managed bean property by using its value
attribute and binds the component's instance to a managed bean property by using its binding
attribute. Likewise, all the converter, listener, and validator tags use their binding
attributes to bind their associated implementations to managed bean properties. See Binding Component Values and Instances to Managed Bean Properties and Binding Converters, Listeners, and Validators to Managed Bean Properties for more information.
To bind a component's value to a managed bean property, the type of the property must match the type of the component's value to which it is bound. For example, if a managed bean property is bound to a UISelectBoolean
component's value, the property should accept and return a boolean
value or a Boolean
wrapper Object
instance.
To bind a component instance to a managed bean property, the property must match the type of component. For example, if a managed bean property is bound to a UISelectBoolean
instance, the property should accept and return a UISelectBoolean
value.
Similarly, to bind a converter, listener, or validator implementation to a managed bean property, the property must accept and return the same type of converter, listener, or validator object. For example, if you are using the convertDateTime
tag to bind a javax.faces.convert.DateTimeConverter
to a property, that property must accept and return a DateTimeConverter
instance.
The rest of this section explains how to write properties that can be bound to component values, to component instances for the component objects described in Adding Components to a Page Using HTML Tag Library Tags, and to converter, listener, and validator implementations.
To write a managed bean property that is bound to a component's value, you must match the property type to the component's value.
Table 12-1 lists the javax.faces.component
classes and the acceptable types of their values.
Table 12-1 Acceptable Types of Component Values
| Component Class | Acceptable Types of Component Values |
|---|---|
|
|
Any of the basic primitive and numeric types or any Java programming language object type for which an appropriate |
|
|
|
|
|
|
|
|
|
|
|
|
When they bind components to properties by using the value
attributes of the component tags, page authors need to ensure that the corresponding properties match the types of the components' values.
The UIInput
and UIOutput
component classes are represented by the component tags that begin with h:input
and h:output
, respectively (for example, h:inputText
and h:outputText
).
In the following example, an h:inputText
tag binds the name
component to the name
property of a managed bean called CashierBean
.
<h:inputText id="name" size="30" value="#{cashierBean.name}" ...> </h:inputText>
The following code snippet from the managed bean CashierBean
shows the bean property type bound by the preceding component tag:
protected String name = null; public void setName(String name) { this.name = name; } public String getName() { return this.name; }
As described in Using the Standard Converters, to convert the value of an input or output component you can either apply a converter or create the bean property bound to the component with the matching type. Here is the example tag, from Using DateTimeConverter, that displays the date on which items will be shipped.
<h:outputText value="#{cashierBean.shipDate}"> <f:convertDateTime type="date" dateStyle="full" /> </h:outputText>
The bean property represented by this tag must have a type of java.util.Date
. The following code snippet shows the shipDate
property, from the managed bean CashierBean
, that is bound by the tag's value in the preceding example:
private Date shipDate; public Date getShipDate() { return this.shipDate; } public void setShipDate(Date shipDate) { this.shipDate = shipDate; }
The UIData
component class is represented by the h:dataTable
component tag.
UIData
components must be bound to one of the managed bean property types listed in Table 12-1. Data components are discussed in Using Data-Bound Table Components. Here is part of the start tag of dataTable
from that section:
<h:dataTable id="items" ... value="#{cart.items}" ... var="item">
The value expression points to the items
property of a shopping cart bean named cart
. The cart
bean maintains a map of ShoppingCartItem
beans.
The getItems
method from the cart
bean populates a List
with ShoppingCartItem
instances that are saved in the items
map when the customer adds books to the cart, as shown in the following code segment:
public synchronized List<ShoppingCartItem> getItems() { List<ShoppingCartItem> results = new ArrayList<ShoppingCartItem>(); results.addAll(this.items.values()); return results; }
All the components contained in the UIData
component are bound to the properties of the cart
bean that is bound to the entire UIData
component. For example, here is the h:outputText
tag that displays the book title in the table:
<h:commandLink action="#{showcart.details}"> <h:outputText value="#{item.item.title}"/> </h:commandLink>
The title is actually a link to the bookdetails.xhtml
page. The h:outputText
tag uses the value expression #{item.item.title}
to bind its UIOutput
component to the title
property of the Book
entity. The first item in the expression is the ShoppingCartItem
instance that the h:dataTable
tag is referencing while rendering the current row. The second item in expression refers to the item
property of ShoppingCartItem
, which returns an Object
(in this case, a Book
). The title
part of the expression refers to the title
property of Book
. The value of the UIOutput
component corresponding to this tag is bound to the title
property of the Book
entity:
private String title; ... public String getTitle() { return title; } public void setTitle(String title) { this.title = title; }
The UISelectBoolean
component class is represented by the component tag h:selectBooleanCheckbox
.
Managed bean properties that hold a UISelectBoolean
component's data must be of boolean
or Boolean
type. The example selectBooleanCheckbox
tag from the section Displaying Components for Selecting One Value binds a component to a property. The following example shows a tag that binds a component value to a boolean
property:
<h:selectBooleanCheckbox title="#{bundle.receiveEmails}" value="#{custFormBean.receiveEmails}"> </h:selectBooleanCheckbox> <h:outputText value="#{bundle.receiveEmails}">
Here is an example property that can be bound to the component represented by the example tag:
private boolean receiveEmails = false; ... public void setReceiveEmails(boolean receiveEmails) { this.receiveEmails = receiveEmails; } public boolean getReceiveEmails() { return receiveEmails; }
The UISelectMany
component class is represented by the component tags that begin with h:selectMany
(for example, h:selectManyCheckbox
and h:selectManyListbox
).
Because a UISelectMany
component allows a user to select one or more items from a list of items, this component must map to a bean property of type List
or array
. This bean property represents the set of currently selected items from the list of available items.
The following example of the selectManyCheckbox
tag comes from Displaying Components for Selecting Multiple Values:
<h:selectManyCheckbox id="newslettercheckbox" layout="pageDirection" value="#{cashierBean.newsletters}"> <f:selectItems value="#{cashierBean.newsletterItems}"/> </h:selectManyCheckbox>
Here is the bean property that maps to the value
of the selectManyCheckbox
tag from the preceding example:
private String[] newsletters; public void setNewsletters(String[] newsletters) { this.newsletters = newsletters; } public String[] getNewsletters() { return this.newsletters; }
The UISelectItem
and UISelectItems
components are used to represent all the values in a UISelectMany
component. See UISelectItem Properties and UISelectItems Properties for information on writing the bean properties for the UISelectItem
and UISelectItems
components.
The UISelectOne
component class is represented by the component tags that begin with h:selectOne
(for example, h:selectOneRadio
and h:selectOneListbox
).
UISelectOne
properties accept the same types as UIInput
and UIOutput
properties, because a UISelectOne
component represents the single selected item from a set of items. This item can be any of the primitive types and anything else for which you can apply a converter.
Here is an example of the h:selectOneMenu
tag from Displaying a Menu Using the h:selectOneMenu Tag:
<h:selectOneMenu id="shippingOption" required="true" value="#{cashierBean.shippingOption}"> <f:selectItem itemValue="2" itemLabel="#{bundle.QuickShip}"/> <f:selectItem itemValue="5" itemLabel="#{bundle.NormalShip}"/> <f:selectItem itemValue="7" itemLabel="#{bundle.SaverShip}"/> </h:selectOneMenu>
Here is the bean property corresponding to this tag:
private String shippingOption = "2"; public void setShippingOption(String shippingOption) { this.shippingOption = shippingOption; } public String getShippingOption() { return this.shippingOption; }
Note that shippingOption
represents the currently selected item from the list of items in the UISelectOne
component.
The UISelectItem
and UISelectItems
components are used to represent all the values in a UISelectOne
component. This is explained in Displaying a Menu Using the h:selectOneMenu Tag.
For information on how to write the managed bean properties for the UISelectItem
and UISelectItems
components, see UISelectItem Properties and UISelectItems Properties.
A UISelectItem
component represents a single value in a set of values in a UISelectMany
or a UISelectOne
component. A UISelectItem
component must be bound to a managed bean property of type javax.faces.model.SelectItem
. A SelectItem
object is composed of an Object
representing the value along with two Strings
representing the label and the description of the UISelectItem
object.
The example selectOneMenu
tag from UISelectOne Properties contains selectItem
tags that set the values of the list of items in the page. Here is an example of a bean property that can set the values for this list in the bean:
SelectItem itemOne = null; SelectItem getItemOne(){ return itemOne; } void setItemOne(SelectItem item) { itemOne = item; }
UISelectItems
components are children of UISelectMany
and UISelectOne
components. Each UISelectItems
component is composed of a set of either UISelectItem
instances or any collection of objects, such as an array, a list, or even POJOs.
The following code snippet from CashierBean
shows how to write the properties for selectItems
tags containing SelectItem
instances.
private String[] newsletters; private static final SelectItem[] newsletterItems = { new SelectItem("Duke's Quarterly"), new SelectItem("Innovator's Almanac"), new SelectItem("Duke's Diet and Exercise Journal"), new SelectItem("Random Ramblings") }; ... public void setNewsletters(String[] newsletters) { this.newsletters = newsletters; } public String[] getNewsletters() { return this.newsletters; } public SelectItem[] getNewsletterItems() { return newsletterItems; }
Here, the newsletters
property represents the SelectItems
object, whereas the newsletterItems
property represents a static array of SelectItem
objects. The SelectItem
class has several constructors; in this example, the first argument is an Object
representing the value of the item, whereas the second argument is a String
representing the label that appears in the UISelectMany
component on the page.
A property bound to a component instance returns and accepts a component instance rather than a component value. The following components bind a component instance to a managed bean property:
<h:selectBooleanCheckbox id="fanClub" rendered="false" binding="#{cashierBean.specialOffer}" /> <h:outputLabel for="fanClub" rendered="false" binding="#{cashierBean.specialOfferText}" value="#{bundle.DukeFanClub}" /> </h:outputLabel>
The selectBooleanCheckbox
tag renders a check box and binds the fanClub
UISelectBoolean
component to the specialOffer
property of CashierBean
. The outputLabel
tag binds the value of the value
attribute, which represents the check box's label, to the specialOfferText
property of CashierBean
. If the user orders more than $100 worth of books and clicks the Submit button, the submit
method of CashierBean
sets both components' rendered
properties to true
, causing the check box and label to display when the page is re-rendered.
Because the components corresponding to the example tags are bound to the managed bean properties, these properties must match the components' types. This means that the specialOfferText
property must be of type UIOutput
, and the specialOffer
property must be of type UISelectBoolean
:
UIOutput specialOfferText = null; UISelectBoolean specialOffer = null; public UIOutput getSpecialOfferText() { return this.specialOfferText; } public void setSpecialOfferText(UIOutput specialOfferText) { this.specialOfferText = specialOfferText; } public UISelectBoolean getSpecialOffer() { return this.specialOffer; } public void setSpecialOffer(UISelectBoolean specialOffer) { this.specialOffer = specialOffer; }
For more general information on component binding, see Managed Beans in JavaServer Faces Technology.
For information on how to reference a managed bean method that performs navigation when a button is clicked, see Referencing a Method That Performs Navigation.
For more information on writing managed bean methods that handle navigation, see Writing a Method to Handle Navigation.
All the standard converter, listener, and validator tags included with JavaServer Faces technology support binding attributes that allow you to bind converter, listener, or validator implementations to managed bean properties.
The following example shows a standard convertDateTime
tag using a value expression with its binding
attribute to bind the javax.faces.convert.DateTimeConverter
instance to the convertDate
property of LoginBean
:
<h:inputText value="#{loginBean.birthDate}"> <f:convertDateTime binding="#{loginBean.convertDate}" /> </h:inputText>
The convertDate
property must therefore accept and return a DateTimeConverter
object, as shown here:
private DateTimeConverter convertDate; public DateTimeConverter getConvertDate() { ... return convertDate; } public void setConvertDate(DateTimeConverter convertDate) { convertDate.setPattern("EEEEEEEE, MMM dd, yyyy"); this.convertDate = convertDate; }
Because the converter is bound to a managed bean property, the managed bean property can modify the attributes of the converter or add new functionality to it. In the case of the preceding example, the property sets the date pattern that the converter uses to parse the user's input into a Date
object.
The managed bean properties that are bound to validator or listener implementations are written in the same way and have the same general purpose.
Methods of a managed bean can perform several application-specific functions for components on the page. These functions include
Performing processing associated with navigation
Handling action events
Performing validation on the component's value
Handling value-change events
By using a managed bean to perform these functions, you eliminate the need to implement the javax.faces.validator.Validator
interface to handle the validation or one of the listener interfaces to handle events. Also, by using a managed bean instead of a Validator
implementation to perform validation, you eliminate the need to create a custom tag for the Validator
implementation.
In general, it is good practice to include these methods in the same managed bean that defines the properties for the components referencing these methods. The reason for doing so is that the methods might need to access the component's data to determine how to handle the event or to perform the validation associated with the component.
The following sections explain how to write various types of managed bean methods.
An action method, a managed bean method that handles navigation processing, must be a public method that takes no parameters and returns an Object
, which is the logical outcome that the navigation system uses to determine the page to display next. This method is referenced using the component tag's action
attribute.
The following action method is from the managed bean CashierBean
, which is invoked when a user clicks the Submit button on the page. If the user has ordered more than $100 worth of books, this method sets the rendered
properties of the fanClub
and specialOffer
components to true
, causing them to be displayed on the page the next time that page is rendered.
After setting the components' rendered
properties to true
, this method returns the logical outcome null
. This causes the JavaServer Faces implementation to re-render the page without creating a new view of the page, retaining the customer's input. If this method were to return purchase
, which is the logical outcome to use to advance to a payment page, the page would re-render without retaining the customer's input. In this case, you want to re-render the page without clearing the data.
If the user does not purchase more than $100 worth of books or if the thankYou
component has already been rendered, the method returns bookreceipt
. The JavaServer Faces implementation loads the bookreceipt.xhtml
page after this method returns:
public String submit() { ... if ((cart().getTotal()> 100.00) && !specialOffer.isRendered()) { specialOfferText.setRendered(true); specialOffer.setRendered(true); return null; } else if (specialOffer.isRendered() && !thankYou.isRendered()) { thankYou.setRendered(true); return null; } else { ... cart.clear(); return ("bookreceipt"); } }
Typically, an action method will return a String
outcome, as shown in the preceding example. Alternatively, you can define an Enum
class that encapsulates all possible outcome strings and then make an action method return an enum
constant, which represents a particular String
outcome defined by the Enum
class.
The following example uses an Enum
class to encapsulate all logical outcomes:
public enum Navigation { main, accountHist, accountList, atm, atmAck, transferFunds, transferAck, error }
When it returns an outcome, an action method uses the dot notation to reference the outcome from the Enum
class:
public Object submit(){ ... return Navigation.accountHist; }
The section Referencing a Method That Performs Navigation explains how a component tag references this method. The section Writing Properties Bound to Component Instances explains how to write the bean properties to which the components are bound.
A managed bean method that handles an action event must be a public method that accepts an action event and returns void
. This method is referenced using the component tag's actionListener
attribute. Only components that implement javax.faces.component.ActionSource
can refer to this method.
In the following example, a method from a managed bean named ActionBean
processes the event of a user clicking one of the links on the page:
public void chooseBookFromLink(ActionEvent event) { String current = event.getComponent().getId(); FacesContext context = FacesContext.getCurrentInstance(); String bookId = books.get(current); context.getExternalContext().getSessionMap().put("bookId", bookId); }
This method gets the component that generated the event from the event object; then it gets the component's ID, which is a code for the book. The method matches the code against a HashMap
object that contains the book codes and corresponding book ID values. Finally, the method sets the book ID by using the selected value from the HashMap
object.
Referencing a Method That Handles an Action Event explains how a component tag references this method.
Instead of implementing the javax.faces.validator.Validator
interface to perform validation for a component, you can include a method in a managed bean to take care of validating input for the component. A managed bean method that performs validation must accept a javax.faces.context.FacesContext
, the component whose data must be validated, and the data to be validated, just as the validate
method of the Validator
interface does. A component refers to the managed bean method by using its validator
attribute. Only values of UIInput
components or values of components that extend UIInput
can be validated.
Here is an example of a managed bean method that validates user input, from The guessnumber-cdi CDI Example:
public void validateNumberRange(FacesContext context, UIComponent toValidate, Object value) { if (remainingGuesses <= 0) { ((UIInput) toValidate).setValid(false); FacesMessage message = new FacesMessage("No guesses left!"); context.addMessage(toValidate.getClientId(context), message); return; } int input = (Integer) value; if (input < minimum || input> maximum) { ((UIInput) toValidate).setValid(false); FacesMessage message = new FacesMessage("Invalid guess"); context.addMessage(toValidate.getClientId(context), message); } }
The validateNumberRange
method performs two different validations.
If the user has run out of guesses, the method sets the valid
property of the UIInput
component to false
. Then it queues a message onto the FacesContext
instance, associating the message with the component ID, and returns.
If the user has some remaining guesses, the method then retrieves the local value of the component. If the input value is outside the allowable range, the method again sets the valid
property of the UIInput
component to false
, queues a different message on the FacesContext
instance, and returns.
See Referencing a Method That Performs Validation for information on how a component tag references this method.
A managed bean that handles a value-change event must use a public method that accepts a value-change event and returns void
. This method is referenced using the component's valueChangeListener
attribute. This section explains how to write a managed bean method to replace the javax.faces.event.ValueChangeListener
implementation.
The following example tag comes from Registering a Value-Change Listener on a Component, where the h:inputText
tag with the id
of name
has a ValueChangeListener
instance registered on it. This ValueChangeListener
instance handles the event of entering a value in the field corresponding to the component. When the user enters a value, a value-change event is generated, and the processValueChange(ValueChangeEvent)
method of the ValueChangeListener
class is invoked:
<h:inputText id="name" size="30" value="#{cashierBean.name}" required="true" requiredMessage="#{bundle.ReqCustomerName}"> <f:valueChangeListener type="javaeetutorial.dukesbookstore.listeners.NameChanged" /> </h:inputText>
Instead of implementing ValueChangeListener
, you can write a managed bean method to handle this event. To do this, you move the processValueChange(ValueChangeEvent)
method from the ValueChangeListener
class, called NameChanged
, to your managed bean.
Here is the managed bean method that processes the event of entering a value in the name
field on the page:
public void processValueChange(ValueChangeEvent event) throws AbortProcessingException { if (null != event.getNewValue()) { FacesContext.getCurrentInstance().getExternalContext(). getSessionMap().put("name", event.getNewValue()); } }
To make this method handle the ValueChangeEvent
generated by an input component, reference this method from the component tag's valueChangeListener
attribute. See Referencing a Method That Handles a Value-Change Event for more information.


Teach a Lesson Today | {% block title %}Main{% endblock %}
{% endblock %}
{% block body %}
What if people understood your work?
Would it help them understand you? Teaching will make you a better programmer, a better coworker and a better lover. Make the world better by promising to teach, today.


Create a VideoView using the CreateVideoView function of the app object:
This control allows your program to play video files stored locally on the phone/tablet and also stream video from remote sources.
Use SetFile to set the video file or video stream address.
When the video is ready to play, the OnReady callback function will be called, you can then use Play to start playing the video.
If the video cannot be played, the OnError callback function will be called. Use SetOnReady and SetOnError to set the names of your OnReady and OnError callback functions.
See 'CreateVideoView for more informations and a complete function list


Genomics, computation and sequencing
Mortazavi Lab at UC Irvine
Former Lab Manager / Lab Technician / Sequencing Specialist
Former MCSB PhD Student
Former Postdoctoral Fellow
Former Dev Cell PhD Student
Former Lab Manager


|
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There will be a special article each month on Cigar Friendly establishments where you can go and enjoy your favorite Stogie with friends and others in an atmosphere where you are appreciated for your patronage.
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Syllabus
The physical state of an astrophysical plasma is most commonly diagnosed with the analysis of spectra obtained by ground-based telescopes and space-borne detectors over a broad range of electromagnetic windows. The goals of this lecture series are to illustrate how spectroscopic data are obtained and reduced, define the physical processes that govern the form of astronomical spectra , and discuss the spectral diagnostics that allow us to formulate a physical picture of distant objects. This will take us on a spectral tour of the universe, from which we can measure the temperatures, pressures, densities, dynamics and magnetic fields of the great diversity of astrophysical sources.
Topics
- Radiative Trasnfer
- Continuous Emission
- Line Formation
- Atomic Physics
- Molecular Spectroscopcy
- Recombination Lines
- HI Line
- Spectroscopic Classification
- Spectral Diagnostics
- Instrumentation
- Spectroscopic Data Reduction
Grading
Tutorials should be submitted as jupyter notebooks. Every student is responsible for their own tutorial, but students may work with other students on tutorials. The student's name and email address should appear at the top of the tutorial. Projects should be handed as pdf. Projects should be submitted as one per group if it is a group project. Each student in the group's name should be included on the report for the project. All work should be submitted via email to<EMAIL_ADDRESS>- 50% Tutorials
- 50% Projects


To Do List
List +
Work
Personal
Find Another Job
Make Transection
Wait for 7PM for Teaching.
Buy some Juice
Do some programming
Laravel Tutorial to complete
Task +
Name of List
Name of Task


Opened in 1893, the canal separates mainland Greece from the Peloponnese. It has a length of 4 miles (about 6 km) and a depth of 26 ft (8 m). The canal came under private management in September 2001.
Position of Corinth 37°56.36'N, 22°55.58'E. Korinthe in Greek.
The cut is too narrow for ships to pass each other, so one must get permission to proceed. All vessels should contact the Isthmia control tower on VHF channel 11 before entering the canal in order to find out what time to be at the canal entrance. There are waiting areas at both ends. Pilotage is not compulsory.
Yachts follow the commercial ships, which are taken through by tug. Do not follow too closely in order to avoid the prop wash.
Payment can only be made at the Isthmia side (Eastern) where small yachts can dock, and should bring their documents to the Customers Service Dept., located in the basement of the Control Tower. Payment can be made either in cash or by credit card.
Fees (April 2013) are based on length and are as follows:-
Less than 6 meters: 50 Euros
From 6 to 9 meters: 80 Euros
From 9.01 to 15 meters: 80 Euros + (L.O.A. - 9)* 23
From 15.01 to 25 meters: 80 Euros + (L.O.A. - 9)* 25
More than 25 meters: 80 Euros + (L.O.A. - 9)* 27
On top of these fees VAT might apply, at time of writing 23%.
The online form for computing transit fees (http://www.aedik.gr/frontend/fee_calculator.php) automatically includes VAT.
Only vessels requesting a tug have to pay a surcharge.
Private yachts both Greek and foreign pay the same amount; however Greek yachts (private & charter) registered in Isthmia, Loutraki and Corinth pay a lower fee.
A vessel can only enter the canal when a permit has been granted by the Canal Service. The canal now has red above green lights on both port and starboard side of the canal at both ends.
By day and night: a green light is shown when entry is permitted, and a red light when entry is not permitted (but only after verbal permission to enter has been granted). Usually you will join a convoy which has large ships at the head.
Port Authorities (East side)
Tel:+30 27410 30880, Fax no. +30 27410 30884
Email<EMAIL_ADDRESS>Canal website
VHF channel 11
The canal is nominally closed on a Tuesdays (06:00 to 18:00) , whether this happens can depend on the amount of traffic.
Last updated August 2014.
At the western entrance of the canal, Corinth Yacht Harbour is to the SW. This is the best berth for yachts under 20m. Larger yachts must contact the Port Authorities on VHF 12 or 16 to obtain permission to berth in the commercial harbour. See comments at bottom of page re. latest information on berthing here.
Korfos, SE of Corinth at 37ºN45.856 023ºE07.514, is a nice enclosed bay, good to anchor with clean swimming water. The local government also run a little jetty here.
Last updated August 2014.


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Rupert Clements, Chiropractor at C1
READ ABOUT OTHERS WHO LOVE USING TM3The product is fantastic and support cannot be faulted. I think you would have to go a very long way to find anything to match the software or the dedication of the support team.
Mark Prudden, Chiropractor at Lowford Clinic
READ ABOUT OTHERS WHO LOVE USING TM3In pure clinical terms, recording patient notes is extremely easy, efficient and effective. In terms of reception staff, the diary and daily accounts are easy to use and logical.
Anne McGoldrick, Physiotherapist at The Physio Company (Dublin)
READ ABOUT OTHERS WHO LOVE USING TM3


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def | __init__ |
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def | header |
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def | mutable_header |
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def | clear_header |
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def | has_header |
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def | cursor |
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def | mutable_cursor |
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def | clear_cursor |
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def | has_cursor |
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def | count |
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def | set_count |
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def | clear_count |
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def | has_count |
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def | offset |
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def | set_offset |
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def | clear_offset |
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def | has_offset |
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def | compile |
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def | set_compile |
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def | clear_compile |
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def | has_compile |
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def | MergeFrom |
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def | Equals |
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def | IsInitialized |
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def | ByteSize |
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def | ByteSizePartial |
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def | Clear |
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def | OutputUnchecked |
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def | OutputPartial |
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def | TryMerge |
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def | __str__ |
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int | has_header_ = 0 |
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int | has_cursor_ = 0 |
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int | has_count_ = 0 |
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int | count_ = 0 |
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int | has_offset_ = 0 |
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int | offset_ = 0 |
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int | has_compile_ = 0 |
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int | compile_ = 0 |
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int | kheader = 5 |
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int | kcursor = 1 |
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int | kcount = 2 |
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int | koffset = 4 |
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int | kcompile = 3 |
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The documentation for this class was generated from the following file:
- code/googleappengine-read-only/python/google/appengine/datastore/datastore_v3_pb.py


( @@ ) path1 path2
Signature: path1:string -> path2:string -> string
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Combines two path strings using Path.Combine
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appSetting name
Signature: name:string -> string
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Retrieves the application settings variable with the given name
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clearProcessEnvironVar name
Signature: name:string -> unit
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Clears the environment variable with the given name for the current process.
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combinePaths path1 path2
Signature: path1:string -> path2:string -> string
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Combines two path strings using Path.Combine
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convertWindowsToCurrentPath windowsPath
Signature: windowsPath:string -> string
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Convert the given windows path to a path in the current system
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directorySeparator
Signature: string
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The directory separator string. On most systems / or \
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documentsFolder
Signature: string
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The path to the personal documents
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encoding
Signature: Encoding
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Contains the IO encoding which is given via build parameter "encoding" or the default encoding if no encoding was specified.
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environVar name
Signature: name:string -> string
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Retrieves the environment variable with the given name
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environVarOrDefault name defaultValue
Signature: name:string -> defaultValue:string -> string
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Retrieves the environment variable with the given name or returns the default if no value was set
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environVarOrNone name
Signature: name:string -> string option
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Retrieves the environment variable or None
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environVars target
Signature: target:EnvironmentVariableTarget -> (obj * obj) list
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Retrieves all environment variables from the given target
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getBuildParam name
Signature: name:string -> string
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Returns the value of the build parameter with the given name if it was set and otherwise an empty string
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getBuildParamOrDefault name defaultParam
Signature: name:string -> defaultParam:string -> string
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Returns the value of the build parameter with the given name was set if it was set and otherwise the given default value
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getDrivesInfo ()
Signature: unit -> seq<string>
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Retrieves information about the hard drives
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getInstalledDotNetFrameworks ()
Signature: unit -> seq<string>
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Returns a sequence with all installed .NET framework versions
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getMachineEnvironment ()
Signature: unit -> MachineDetails
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Retrieves lots of machine specific information like machine name, processor count etc.
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getTargetPlatformDir platformVersion
Signature: platformVersion:string -> string
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Gets the local directory for the given target platform
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hasBuildParam name
Signature: name:string -> bool
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Returns if the build parameter with the given name was set
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isLinux
Signature: bool
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Determines if the current system is a Linux system
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isMacOS
Signature: bool
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Determines if the current system is a MacOs system
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isMono
Signature: bool
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Determines if the current system is a mono system
Todo: Detect mono on windows
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isUnix
Signature: bool
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Determines if the current system is an Unix system
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monoArguments
Signature: string
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Arguments on the Mono executable
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platformInfoAction psi
Signature: psi:ProcessStartInfo -> unit
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Modifies the ProcessStartInfo according to the platform semantics
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ProgramFiles
Signature: string
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The path of the "Program Files" folder - might be x64 on x64 machine
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ProgramFilesX86
Signature: string
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The path of Program Files (x86)
It seems this covers all cases where PROCESSOR_ARCHITECTURE may misreport and the case where the other variable
PROCESSOR_ARCHITEW6432 can be null
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setEnvironVar name value
Signature: name:string -> value:string -> unit
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Sets the environment variable with the given name
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setProcessEnvironVar name value
Signature: name:string -> value:string -> unit
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Sets the environment variable with the given name for the current process.
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SystemRoot
Signature: string
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The system root environment variable. Typically "C:\Windows"
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TargetPlatformPrefix
Signature: string
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The path of the current target platform
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Color Palette Generator
Upload your image or logo to see its color palette
{{form.hidden_tag()}} {{form.photo(class="u-full-width")}} {% for error in form.photo.errors %}
{{ error}}
{% endfor %}
From 1 to 10 {10 being the smallest} how large would like your palette?
{{form.palette_height(class="u-full-width", value=4)}} {% for error in form.palette_height.errors %}
{{ error}}
{% endfor %}
From 1 to 40 (40 being the thinest) what border-width would you prefer?
{{form.palette_outline_width(class="u-full-width", value=10)}} {% for error in form.palette_outline_width.errors %}
{{ error}}
{% endfor %}
Please select the color you would like your palette border to have (click on the box for options):


Your password should contain at least 6 characters, 1 number and 1 capital letter:
Enter Password:
Re-enter Password:


Touchscreen Basic Sample
Overview
This sample application displays touchscreen-values x and y in the center of the screen.
The touchscreen triggers an interrupt when touched. This means that data is ready and can be collected.
However, using the interrupt with the handler, does not seem to work within the GUI. When used in samples/sensor/cst816s, it runs….
Requirements
Pinetime watch zephyr cst816s driver
Building and Running
west build -p -b pinetime samples/gui/lvtouch


Plasma Cash (2019-01-20)
Transcript By: Bryan Bishop
Category: Conference
Plasma Cash: Towards more efficient Plasma constructions
Georgios Konstantopolous (gakonst)
https://twitter.com/kanzure/status/1090691501561020416
Shi: Okay, we’re going to start the next session. Please return to your seats. I have an important announcement before the session starts.  Please go to the overflow rooms at the end of the hallway. We don’t want the fire marshall to come and shutdown the conference. Also, the acoustics of the room make it so that we can hear the details of your conversations in the back. Our first talk in this session is about Plasma Cash.
Introduction
Hi everyone, thank you for coming. I’m going to talk about plasma and plasma cash which was introduced in 2017 by Vitalik Buterin and Joseph Poon. Since then, the technique has evolved a lot. I’m here to talk about what it can do and can’t do. In ethereum, it’s been a big buzzword so let’s talk about limits.
Table of contents
I’ll describe how transactions work, how you can get transactions into and out of plasma, what are the security assumptions they have, and what we can do in the future to make it even better.
Related work
Related work includes sidechains with two-way pegs like merged mining svp proof or NiPoPoWs, or federated pegs using multisig. Also, there’s drivechains which have different properties, and then shadowchains and treechains and client-side validation and NOCUST. I don’t understand treechains. NOCUST is similar to plasma.
Plasma
Plasma is a framework for creating non-custodial sidechains. In the normal model, in a sidechain you get your funds in, you do transactions, then you do a special transaction to do a peg-out transaction. There’s some spending conditions and an escrow contract. But if the sidechain doesn’t allow you to exit and unlock the funds on the parent chain, or if the multisig participants are censoring you, then you can’t really get your funds and they are stuck. So what do you do?
In plasma, we take each transaction root from each block and commit it to the original chain. If we want to do scalability, rather than having a decentralized chain, we have some untrusted database manager which in plasma lingo is the “operator” and it’s responsible for maintaining the state of the chain and it makes block commitments. The operator doesn’t need to be trusted. You cannot assume the state transitions will be valid.
So you need to introduce a way that in the case where the state validator makes an invalid state transition then users need to be able to make a dispute.
Exit game: Delayed withdrawals
At some point, you say you want to start an exit. You go to an escrow contract, you say please unlock my funds, you have a timelock, and then after that point the transaction is finalized and you got your funds out. But if in the case that there’s a dispute, some other party will do a challenge transaction which will cancel the exit.
Non-fungible Plasma, aka Plasma Cash
UTXO ID is the leaf index in a sparse merkle tree. The deposit means you receive a coin with a seiral number, just like anonymous cash. For each 1 input you get 1 UTXO. To make a transaction, you reference a parent transaction. To exit, you reveal the transaction and the parent transaction.
What’s a sparse merkle tree?
Let me show you a nice graph. It’s an ordered merkle tree where each index of an element is its ID. This allows you to do an inclusion proof. Since it’s a sorted ordered merkle tree, you can also do exclusion proofs, where you attest to the inclusion of zero.
Transfers, exits and challenges
Say I have some funds on the main chain. I deposit them into a smart contract, which then emits an event, which then grants me the funds on the Plasma chain. If the Plasma chain doesn’t grant you any funds, then you can withdraw them and simply get them back directly.
Okay, the user now has a coin and she wants to transfer it to another user. Alice transfers to Bob. Bob verifies the coin by checking its history. The transaction history grows with the number of hops, and it all needs to be verified.
The receiver must verify the UTXO history since the coin’s deposit, even when the block didn’t have a related transaction. You need to send merkle exclusion proofs or merkle nonmembership proofs. So you would have to get this from the last user, or from the operator, or from some data availability provider such as the operator.
You exit by referencing the transaction and where you got it from.
Exits
We can model each coin as a state machine. When you deposit, it’s in the deposited state. E is for exit. When you start an exit, the coin goes to the exiting stage. Then you can wait 7 days, finalize the exit, and then you can go to the next state, and then you can withdraw your coin. By the time you withdraw the coin, it’s out of the system.
Non-interactive challenge
In the other case, say it’s an exit and it’s a bad exit state, and someone does a non-interactive challenge and I’m back to square one. This enforces that you can’t have an invalid state for the coin.
Interactive challenge
There are also interactive challenges. I can respond within some time period to the interactive challenge. An exit is only valid if it has zero outstanding pending challenges. You could respond to a challenge and then proceed as normal.
Operator
What if the operator wants to steal coins? The operator can include an invalid state transition. This would be a case of an exiting a coin with invalid history. Say the operator gives the coin to Bob or something. If Bob and Charlie were honest parties, they would check the coin history and reject the coin because the history was invalid. But what if they are colluding to steal the coin?
You can make an interactive challenge of an invalid history where you claim you’re not the latest owner of the coin, no I’m the latest owner. So you will provide the merkle proof, and someone can reply with another merkle proof showing something else. There’s no extension of the challenge period, so this is at most one or two steps of interaction depending on the attack. This is an attack that requires the database operator to try to steal funds from their users, which as a business you would expect the users would then get out of the chain or whatever.
Security and incentive compatibility
Let’s talk about the security of this exit game. So far, we haven’t talked about miners. When you do the exit, you need to go to the parent chain and your transaction needs to be included in some bound time. Considering the network is live, a challenge can be broadcast almost at the same time as when you try a malicious exit. But maybe nobody is watching or nobody cares, so you need some delay. We need to model that when a challenge is broadcasted later, and then some threshold for when the challenge must be included. The later that you challenge, the easier it is to pull off this attack.
We have a safety condition where we pick the parameter T based on how powerful adversarial hash power would be. The safety condition is that D <= T + t0 - t1.
The attacker decision flow would be make a malicious exit, pay the transaction fees plus bond, and then in the case of success you get back the bond and you get the coin and you pay some transaction fees. Or the attack fails. But the attacker can go further and they can even attempt to frontrun the challenge. So the attacker tries to make a malicious exit, they frontrun a challenge by challenging themselves. This can be used to cut your losses from losing the bond. Instead of cutting your whole bond, you would only cut part of the bond. So perhaps there would be a percent of bond going to charity.
Incentive compatibility of the exit game
It depends on the on-chain conditions like withholding blocks, selfish mining, etc. It also depends on liveness of participants and a challenge period. The cost of an attack is simply the transaction fees and the fidelity bond which goes to the challenger, multiplied by the probability of a challenge because that’s how much you will lose on average.
Even if an attacker front runs, they can stop losing the bond, because if they frontrun the transaction they just pay some transaction fees. So we add a parameter alpha which is less than 1 and you burn part of the bond. If the probability is too low, then the attacker wont frontrun.
Future and ongoing work
This is where we are currently. Plasma Cash is being implemented and used. There’s some pain points we need to address. This scheme is secure and succinct and doesn’t require many requirements on the client side. Each coin is unique. Non-fungible coins are a double-edged sword. You could do some sort of change provider where just like cash you just pay 5 and you get back 2. The limitation here is that there needs to be a primitive like an atomic swap where you have one transaction giving a coin and another one you receive a coin. This is an open problem.
The other alternative is Plasma Debit which was proposed by Dan Robinson a few months ago. Instead of having a coin that is just one bill, you can think of it as a … and instead of having like the Liquid is full and you can go from any value from zero to the capacity of the liquid. You can make arbitrary payments by.. increasing the other by the same amount. This also requires atomic payments. If we solve atomic payments then we can have both.
The other approach which is taken currently by some people is that instead of having one coin with some value, you take a coin and break it down into very small pieces. INstead of having one, you have very tiny pieces. When you transact, you transact in batches of coins. This is defragmentation or cashflow. The data on the client side grows linearly with the amount of fragments.
Reduce data requirements for light clients
The problem is that there’s linearly increasing proof size of coin history. This requires a lot of bandwidth and storage. So we need to find a solution to this. One thing you could do is checkpointing where you have the operator say the latest state and prove me wrong and you would make a signature where they attest to the latest state and then discard older data from before that. This requires a lot of communication overhead because the operator needs to talk with all parties and ask for consent to checkpoint the coin. They could implicitly say I’ll checkpoint everything, but then there are some other challenges.
Another approach is less frequent commitments. The safest thing to do is commit once every parent chain block. If you commit very fast, a miner could orphan a parent chain block and then this would orphan multiple Plasma chain transactions. So you should commit a plasma root once every 6 or 7 or 10 blocks or whatever is safe for you.
There’s some work from the Stanford crypto group on accumulators and vector commitments. So you would commit with each merkle block root, but also an RSA accumulator of coins moved, and then commit an RSA accumulator 100 blocks later, and if you see that a coin has not been accumulated since then, then you know there has been no transaction in between. Instead of transferring 100 merkle exclusion proof, you transfer only 1 RSA exclusion proof.
Or you could use zkSNARKs or STARKs to compress the whole history. But if you get to the point where you’re using this kind of technology, then maybe you should just use a totally different design anyway.
State channels and plasma?
What I have described so far is only for payments on the Plasma chain. There’s another proposal called state channels which is a superset of these protocols. If you can fund a channel from Plasma and you can settle a channel to Plasma, why is it different– I would claim it’s the same as doing smart contracts on Plasma because all you care about is that you get some value transacted. This has the advantage for Plasma that you could do smart contracts. You can open channels and close them with no cost because you’re already Plasma at zero-cost. But the requirement is that you need to create multisig accounts for escrow in Plasma and also timelocked UTXOs for non-cooperative cases. Maybe we could add Plasma script or miniscript, or maybe use scriptless script and hide the script inside the signature.
Summary
Plasma is a non-custodial sidechain where you notarize blocks and use a game to enforce safety which is guaranteed as long as one honest party within the whole dispute period is able to get a challenge into the main chain.
Off-chain gas-less fixed denomination payments with mainchain finality, no onboarding cost. Users must audit only the mainchain contract for fraud. Light client side validation is very light. Other plasma versions require full validation which is impractical for light clients.
WIP includes smart contracts, arbitrary payments, and better lite clients.


WITNESS LIST Education Committee March 7, 2001 - 9:00A SB 104 FOR: Lara, Rene Legislative Liaison (Texas Federation of Teachers), Austin, TX Registering, but not testifying: For: Craven, Susan Executive Director (Texans Care for Children), Austin, TX Hollinsworth, Lonnie Attorney (TCTA), Austin, TX Kelly, Jack (TSTA), Austin, TX Noble, Shannon Legislative Counsel (Texas Council on Family Violence), Austin, TX Smith, Lauren (ATPE), Austin, TX SB 218 ON: Anderson, David Lawyer (Texas Education Agency), Austin, TX Flathouse, Ed Education (Texas Education Agency), Austin, TX Ressel, Betty Manager, TX School Performance Review (Comptroller's Office), Austin, TX Registering, but not testifying: For: Borden, Sandi Executive Director (Texas Elementary Principals and Supervisors Association), Austin, TX Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Pace, Sheryl (Texas Taxpayers and Research Association), Austin, TX Whalen, Ken Director of Legislative Affairs (Texas Press Association), Austin, TX Wynn, Jimmy (Texas School Public Relations Association), Houston, TX On: Price, Gary Researcher (Comptroller's Office), Austin, TX SB 266 FOR: Byrd, Jimmy District School Administrator (Richland Springs I.S.D.), Richland Springs, TX Smith, Mike Assistant Superintendent Forney I.S.D. (Self), Forney, TX AGAINST: Kelly, Jack (TSTA), Austin, TX ON: Anderson, David Lawyer (Texas Education Agency), Austin, TX Wisnoski, Joe Managing Director (Texas Education Agency), Austin, TX Registering, but not testifying: For: Borden, Sandi Executive Director (Texas Elementary Principals and Supervisors Association), Austin, TX On: Smisko, Ann Administration (Texas Education Agency), Austin, TX SB 430 ON: Dunn, Margaret Executive Director (Texas School Safety Center), San Marcos, TX Mabry, Rodney University President (The University of Texas at Tyler), Tyler, TX Spriggs, Vicki Advisory Council Member (School Safety Center), Austin, TX Registering, but not testifying: For: Ashby, Cindy Government Relations Coordinator (Texas Counseling Association), Austin, TX Bond, Victor Law Enforcement (Texas School Safety Center), Houston, TX Brawner, Chuck Chief of Police Spring Branch I.S.D. (School Safety Center Advisory Board), Katy, TX Eckhart, Harley Associate Executive Director (Texas Elementary Principals and Supervisors Association), Austin, TX Grabbe, Donna Grant Secretary (Texas School Safety Center), San Marcos, TX Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Kelly, Jack (TSTA), Austin, TX Leal, Alma Counselor Educator (Texas Counseling Association), Brownsville, TX McAfee, Archie Executive Director (Texas Association of Secondary School Principals), Austin, TX Smith, Lauren (ATPE), Austin, TX Sockol, Kay School Counselor (Texas Counseling Association), Austin, TX Wynn, Jimmy Director of Public Information (Harris County Department of Education), Houston, TX On: Jacobs, Billy (TEA), Austin, TX Perez, Aimee Research and Web Page Coordinator (Texas School Safety Center), Austin, TX Porter, Betty Counselor (Texas Counseling Association), Houston, TX Renick, Judy Associate Director (Texas School Safety Center), San Marcos, TX SB 450 FOR: Clore, Paul Superintendent (George West I.S.D.), George West, TX McGraw, Ken Superintendent (La Mesa I.S.D.), La Mesa, TX Orr, Dawson Superintendent (Pampa I.S.D.), Pampa, TX Registering, but not testifying: For: Burleson, Steve Superintendent (Spur I.S.D.), Spur, TX Dunn, David (Texas Association of School Boards), Austin, TX Grusendorf, Bill Executive Director (Texas Association of Rural Schools), San Saba, TX Harlow, Terry Executive Director (Region XIV Service Center), Abilene, TX Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Maikell, Steve Superintendent (Sweetwater I.S.D.), Sweetwater, TX Martinez, Louann Governmental Relations (Texas Association of School Administrators), Austin, TX McClenny, Larry Superintendent (Patton Springs I.S.D.), Afton, TX Waller, Jim Superintendent (Petersburg I.S.D.), Petersburg, TX SB 462 ON: Schumann, Brenda President of Texas Tech Student Senate (Texas Tech), Lubbock, TX Shonrock, Michael Vice President for Student Affairs (Texas Tech University), Lubbock, TX SB 477 FOR: Lara, Rene Legislative Liaison (Texas Federation of Teachers), Austin, TX Schneider, Rick Superintendent (Pasadena I.S.D.), Pasadena, TX ON: Jung, Ronnie CFO (Teacher Retirement System), Austin, TX Registering, but not testifying: For: Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Kelly, Jack (TSTA), Austin, TX Martinez, Louann Governmental Relations (Texas Association of School Administrators), Austin, TX Smith, Lauren (ATPE), Austin, TX SB 518 FOR: Leal, Alma University Professor (Texas Counseling Association), Brownsville, TX Porter, Betty School Counselor (Texas Counseling Association), Houston, TX Sockol, Kay School Counselor (School Counselors), Austin, TX Registering, but not testifying: For: Ashby, Cindy Government Relations Coordinator (Texas Counseling Association), Austin, TX Smith, Lauren (ATPE), Austin, TX SB 524 FOR: Koch, Steve Athletic Director (Jesuit College Prep), Dallas, TX Meyer, Sister Jane Head of School (St. Agnes Academy), Houston, TX Nevle, Richard Principal (Strake Jesuit College Prep), Houston, TX ON: Bradford, Ron (TEA), Austin, TX McAfee, Archie Executive Director (Texas Association of Secondary School Principals), Austin, TX Registering, but not testifying: Against: McGraw, Ken Superintendent (La Mesa I.S.D.), La Mesa, TX Waller, Jim Superintendent (Petersburg I.S.D.), Petersburg, TX SB 538 FOR: Leal, Alma University Professor (University of Texas at Brownsville), Brownsville, TX Registering, but not testifying: For: Ashby, Cindy Governenment Relations Coordinator (Texas Counseling Association), Austin, TX Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Porter, Betty School Counselor (Texas Counseling Association), Houston, TX Smith, Lauren (ATPE), Austin, TX SB 627 FOR: Watson, Ryan Student (The University of Texas at Tyler), Tyler, TX ON: Lunsford, Dale Dean of Student Affairs (The University of Texas at Tyler), Tyler, TX SB 628 FOR: Crane, Neil Student (University of Texas at Tyler), Tyler, TX ON: Lunsford, Dale Dean of Student Affairs (The University of Texas at Tyler), Tyler, TX Mabry, Rodney University President (The University of Texas at Tyler), Tyler, TX SB 646 FOR: Lara, Rene Legislative Liaison (Texas Federation of Teachers), Austin, TX Lavine, Dick Senior Fiscal Analyst (Center for Public Policy Analysis), Austin, TX ON: Cloudt, Criss Associate Commissioner (Texas Education Agency), Austin, TX Treisman, Philip Uri Director (Dana Center), Austin, TX Warren, Doug (Texas Legislative Council), Austin, TX Registering, but not testifying: For: Eckhart, Harley Associate Executive Director (Texas Elementary Principals and Supervisors Association), Austin, TX Hollingsworth, Lonnie Attorney (TCTA), Austin, TX Martinez, Louann Governmental Relations (Texas Association of School Administrators), Austin, TX McAfee, Archie Executive Director (Texas Association of Secondary School Principals), Austin, TX Ramos, Joe Governmental Relations (TASB), Austin, TX Smith, Lauren (ATPE), Austin, TX SB 728 FOR: Garza, Annette Doctoral Student (University of Texas at San Antonio), San Antonio, TX Morris, Ian Graduate Student (Self), San Antonio, TX Moyer, Mary Pat CEO (San Antonio Greater Chamber of Commerce &Tech Business), San Antonio, TX ON: Cigarroa, Francisco President (University of Texas Health Science Center), San Antonio, TX Romo, Ricardo President (University of Texas at San Antonio), San Antonio, TX Registering, but not testifying: For: Aslakson, Jill (Texas Healthcare and Bioscience Institute), Austin, TX Castaneda, Tristan Government Affairs Consultant (The City of San Antonio), Austin, TX Meilandt, William Graduate Student (University of Texas at San Antonio), San Antonio, TX SB 755 AGAINST: Hollingsworth, Lonnie Attorney (TCTA), Austin, TX ON: Orr, Dawson Superintendent (Texas Association of School Boards), Pampa, TX Smisko, Ann Administrator (Texas Education Agency), Austin, TX SB 826 FOR: Bowman, Billy Superintendent (Santa Gertrudis I.S.D.), Kingsville, TX Registering, but not testifying: For: Cisneros, Marc President A&M Kingsville (Self), Kingsville, TX


Switches communicate an action a user can take. They are typically placed throughout your UI, in places like dialogs, forms, cards, and toolbars.
You can use the switch-component like you would use a regular checkbox:
switch-component
checkbox


Presented By Taylor McGlone
Lab 5 Mapping Streaming Data with Google Maps API
Earthquake Data from Geonet and Google maps API
GeoNet


{{block "end_game" .}}
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