[gecode-users] posting a reified equality constraint
Denys Duchier
denys.duchier at univ-orleans.fr
Sat Oct 4 13:08:39 CEST 2008
Guido Tack <tack at ps.uni-sb.de> writes:
> post(this, eqv(~(X == k), B));
Thanks! Is there some reason that minimodel.hh does not provide
overloadings such as the one below instead?
Gecode::MiniModel::BoolExpr
operator==(const Gecode::MiniModel::LinRel<Gecode::IntVar>& e,
const Gecode::MiniModel::BoolExpr& b)
{ return eqv(~e,b); }
Cheers,
--Denys
More information about the gecode-users
mailing list


For this 3-week project, our goal was to design a product to help Rakuten with it’s selling. After brainstorming, we decided to build a piggy bank backed by the cloud.
We first built a prototype in an hour with kits from LittleBits. To count the coins accurately, we tested different ways for coins to fall into the piggy bank.
The speed of the coins, the friction of the slide, and the spacing of the coin slots were determined to be the most critical issues. We iterated several times on the prototype to determine the best combination of factors to separate the coins.
We used an Arduino to calculate the savings. When the money reaches a certain amount, e.g. 1 dollar, it would send a signal to IFTTT, which will then send a notification of what kind of toys could be purchased.


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When it comes to websites or apps, one of the first impression you consider is the design. It needs to be high quality enough otherwise you will lose potential users due to bad design.
When your website or app is attractive to use, your users will not simply be using it, they’ll look forward to using it.
This means that you should fashion the look and feel of your interface for your users.
Responsive Web design is the approach that suggests that design and development should...
This would eliminate the need for a different design and development phase for each...

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Thunderstorm in the area of responsibility this afternoon through this evening.
20 PSD Files, 10 AI Files, 10 Sketch Files, Documentation and much more...
| License: | Regular License |
|---|---|
| File Types: | .PSD, .AI, .SKETCH |
| Support: | 24/7 |
| Photoshop Plugins: | 2 |
|---|---|
| Photoshop Actions | 4 |
| Wireframes: | 1 |
When it comes to websites or apps, one of the first impression you consider is the design...Read more
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Add .table-primary
for a primary colored table.
| Name | Age | Start date | Salary | |
|---|---|---|---|---|
| Tiger Nixon | 61 | 2011/04/25 | $320,800 | |
| Garrett Winters | 63 | 2011/07/25 | $170,750 | |
| Ashton Cox | 66 | 2009/01/12 | $86,000 | |
| Cedric Kelly | 22 | 2012/03/29 | $433,060 | |
| Airi Satou | 33 | 2008/11/28 | $162,700 |
A brand new wallpaper design contest is now live! See what theme you'll be challenged with this month!
A responsive, mobile friendly version of the comments dashboard is now available to.
Photoshop is clearly our favorite photo editing software. In this article, we have listed 30 photo effect tutorials that will show you how to perform a wide range... Read more
Photoshop is clearly our favorite photo editing software. In this article, we have listed 30 photo effect tutorials that will show you how to... Read more


Sondland: Trump Never Asked Directly for Quid Pro Quo
U.S. Ambassador to the European Union Gordon Sondland told the House Intelligence Committee impeachment hearing on Wednesday that President Donald Trump never told him directly that military aid to the Ukraine was contingent on the announcement of corruption investigations.
by Penny Starr“President Trump never told me directly that the aid was conditioned on meetings,” Sondland said when answering questions from Daniel Goldman, the Democrat counsel and director of investigations for the committee.
“The aid was my own personal guess,” said Sondland.
Sondland also said Trump never mentioned an investigation about investigations being required for Ukraine to receive aid from the United States.
“I never heard from President Trump that aid was conditioned on an announcement of elections,” Sondland said.
Follow Penny Starr on Twitter


If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the ContextMenuEvent's node.double sceneY
Scene
that contains the ContextMenuEvent's node.
If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the ContextMenuEvent's node.PickResult pickResult
Node
is a
Shape3D
node and its pickOnBounds is false.private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
double screenX
double screenY
double sceneX
Scene
that contains the DragEvent's node.
If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the DragEvent's node.double sceneY
Scene
that contains the DragEvent's node.
If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the DragEvent's node.PickResult pickResult
Node
is a
Shape3D
node and its pickOnBounds is false.Object gestureSource
Object gestureTarget
TransferMode transferMode
javafx.scene.input.DragEvent.State state
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
double screenX
double screenY
double sceneX
double sceneY
boolean shiftDown
boolean controlDown
boolean altDown
boolean metaDown
boolean direct
boolean inertia
PickResult pickResult
Node
is a
Shape3D
node and its pickOnBounds is false.private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
private void writeObject(ObjectOutputStream oos) throws IOException
IOException
String committed
int caretPosition
String text
InputMethodHighlight highlight
String character
character
will have the value "A" for a key typed
event generated by pressing SHIFT + 'a'.
For key pressed and key released events, character
is always
CHAR_UNDEFINED
.String text
text
is always the empty string.KeyCode code
code
is always KeyCode.UNDEFINED
.boolean shiftDown
boolean controlDown
boolean altDown
boolean metaDown
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
javafx.scene.input.MouseEvent.Flags flags
double screenX
double screenY
double sceneX
Scene
that contains the MouseEvent's node.
If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the MouseEvent's node.double sceneY
Scene
that contains the MouseEvent's node.
If the node is not in a Scene
, then the value is relative to
the boundsInParent of the root-most parent of the MouseEvent's node.MouseButton button
int clickCount
boolean stillSincePress
boolean shiftDown
boolean controlDown
boolean altDown
boolean metaDown
boolean synthesized
boolean popupTrigger
Note: Popup menus are triggered differently
on different systems. Therefore, popupTrigger
should be checked in both onMousePressed
and mouseReleased
for proper cross-platform functionality.
boolean primaryButtonDown
true
if primary button (button 1, usually the left) is currently
pressed. Note that this is different from the button
variable in that the button
variable indicates which button press was
responsible for this event while this variable indicates whether the
primary button is depressed.boolean secondaryButtonDown
true
if secondary button (button 3, usually the right) is currently
pressed. Note that this is different from the button
variable in that the button
variable indicates which button press was
responsible for this event while this variable indicates whether the
primary button is depressed.boolean middleButtonDown
true
if middle button (button 2) is currently pressed.

String filename
The URL of the file where the error occurred, if possible.
int lineno
The line number if the file, if possible.
String source
The string containing the JavaScript code being evaluated.
int tokenIndex
The index into the source string where the error occurred.
int wrappedExceptionType
Type of the wrapped JavaScript exception.
Object wrappedException
JavaScript exception wrapper.
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 2008, 2021, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


Ranking
PG : Played Game
W : Won
D : Draw
L : Lost
GF : Goals For
GA : Goals Against
GD : Goal Difference
Pts : Points


{{modalTitle}}
1
Common
2
Resource
3
Performance
4
Alarm
Name
*
Vendor
Version
Ftp Type
*
ftp
sftp
IP
*
Port
*
User
*
Password
Remote Path
Passive
true
false
Ftp Type
*
ftp
sftp
IP
*
Port
*
User
*
Password
Remote Path
Passive
true
false
IP
*
Port
*
User
*
Password


- getArguments() - Method in class tech.gitpicard.jcalc.ast.CallNode
-
Get a list of all the arguments that will be passed to
the function.
- getContents() - Method in class tech.gitpicard.jcalc.Token
-
Get a plain-text string storing the token literal.
- getFunction() - Method in class tech.gitpicard.jcalc.ast.CallNode
-
Get the name of the function that will be called.
- getFunction(String) - Method in class tech.gitpicard.jcalc.JCalculator
-
Get the function with the desired name.
- getIdentifer() - Method in class tech.gitpicard.jcalc.ast.VariableNode
-
- getLeft() - Method in class tech.gitpicard.jcalc.ast.BinaryNode
-
The left side of the expression.
- getOperation() - Method in class tech.gitpicard.jcalc.ast.BinaryNode
-
The operation to perform with the two child nodes.
- getOperation() - Method in class tech.gitpicard.jcalc.ast.UnaryNode
-
Get the operation that this node performs.
- getRight() - Method in class tech.gitpicard.jcalc.ast.BinaryNode
-
The right side of the expression.
- getRight() - Method in class tech.gitpicard.jcalc.ast.UnaryNode
-
Get the expression/tree that is underneath this node.
- getType() - Method in class tech.gitpicard.jcalc.Token
-
The type of token represented by this object.
- getValue() - Method in class tech.gitpicard.jcalc.ast.LiteralNode
-
Get the constant being held by this node.
- getVariable(String) - Method in class tech.gitpicard.jcalc.JCalculator
-
Get the value defined by a variable.
- GREATER - tech.gitpicard.jcalc.Operation
-
Is the left side greater than the right side?
- GREATER - tech.gitpicard.jcalc.TokenType
-
The greater than operator.
- GREATER_OR_EQLS - tech.gitpicard.jcalc.Operation
-
Is the left side greater than or equal to the right side?
- GREATER_OR_EQLS - tech.gitpicard.jcalc.TokenType
-
The greater than or equals to operator.


Session 01: We'll Be Discussing On Basics of Web Development. Starting With HTML, CSS And We Will Get Start With Bootstrap v4.6
Session 02: Whatever We Learned in Session One We'll Make a Buetifull Bootstrap Project With That. We'll Create Personal Portfolio And Amzing Disscussion
Session 03: We Will Discuss On Javascript, Jquery and Various CDNs Like aos(Animate On Scroll), Font-Liabraries Like FontAweasom And Unicons by Iconscout Also We'll Discuss On Great Project With Help of Our Learnings
Session 04:The Tutorials On PHP Stating With PHP Forms - Login And Register With PHP And Basic OOP Concepts of PHP. We'll Learn MySql Database And Some DBMS (Database Management System) Concepts.
Session 05:How To Process Ajax Request And Impementing PHP Knowledge To Create Web Application of MCQ Website
Session 06:Last Session of Web Development Domain. We'll Learn Introduction To React, How To Install React, React Structuring, Adding Styles To React, How To Add Bootstrap in React And React Router Dom
Session 01:We'll Discuss On Basics of Digital Marketing, What is SEO, Basic on Digital Advertisments (Google Ads), Affilate Marketing, Social Media Marketing, Email Marketing And Other Ways of Digital Marketing. In Details Topics Will Be Disccused In Further Sessions
Session 02: How To Write Good Blog, Way To Google Search Console, On-Page SEO And Off-Page SEO, How To Create Sitemaps, What is Google Analytics And How To Use It
Session 03: We'll Discuss More About SEO And Various Tools Which We Will Use For Keyword Research. A Breif on SEMRush And Google Keyword Planner. Disscussion on Email Marketing
Session 04: How To Run Ads On Google. A Breif On Youtube Ads And Google Ads. What Are Google Ads Beginers Offer
Session 05: How To Start Career in Affilate Marketing, More About SEO, SEM, Social Media Marketing
Session 01: We'll Be Discussing On Basics of Data Science. Basic Statistical Descriptions of Data (Metadata),Open Access Datasets - Google Dataset Search, Kaggle, UCI Machine Learning Repository, Visual Data, MNIST.
Session 02: We'll Be Discussing On Data Exploration – Reading data from file, dataframe, Data import and export; Apply basic statistical methods- mean, max, variance on the data and visualize in R/Python Pandas in Python/R.
Session 03: We'll Be Discussing On Data
visualization: Basic charts scatter plots, Histogram, advanced
visualization Techniques
like streamline and statistical measures, Plots, Graphs, networks,
Hierarchies, Reports.
Python: pandas library-Data frame, Data cleaning,
Visualization
using python
Google chart API: Introduction to Keras, Tensorflow and
apache
spark
Session 04: We'll Be Discussing On Descriptive
Statistics and Inferential Statistics, ANOVA
and ANOCOVA And Measures of Position
Linear Algebra: Matrix and vector algebra
Understanding of calculus: concept of function and
derivative
Session 01: We'll Be Discussing On Basics Machine Learning, Data and types, Models. Data and Dimensionality, Regression :Univariate Regression and Multivariate Regression
Session 02: Project Developmemt: How To Research and analyze data sets using a variety of statistical and machine learning techniques Communicate final results and give context
Session 03: Biological Neuron, Introduction to ANN, Learning parameters, Concept of Deep Learning
Session 04: How To Get Internship in Machine Learning and Data Science, Resume Building, Start In Machine Learning Career, Top Internships To Apply In ML, Top Questions Asked In ML Interviews
Session 01: We'll Be Discussing On Basics of Data Science. Basic Statistical Descriptions of Data (Metadata),Open Access Datasets - Google Dataset Search, Kaggle, UCI Machine Learning Repository, Visual Data, MNIST.


[index]
(Jordan Matrix)
This class expresses the Jordan canonical matrix.
none.
Algebra::MatrixAlgebra#jordan_form
Algebra::MatrixAlgebra#jordan_form_info
::new(array)
Returns a instance of JordanForm.
array is the array of the pair of [diagonal component, size]
.
To get the matrix expression, apply to_matrix for the upper
triaglular matrix or to_matrix_l for the lower.
Exampe:
j = Algebra::JordanForm.new([[2, 3], [-1, 2]]) j.to_matrix.display #=> # 2, 1, 0, 0, 0 # 0, 2, 1, 0, 0 # 0, 0, 2, 0, 0 # 0, 0, 0, -1, 1 # 0, 0, 0, 0, -1
::construct(elem_divs, facts, field, pfield)
::decompose(m)
Returns the array:
[jm, tL, sR, field, modulus]
where jm is the Jordan matrix of m,
tL and sR are the left and right deformation matrix
from m tojm,
field is the mimimal decompostion field to Jordan decompose and
modulus is the polynomials to the algebraic extention.
(tL * sR == the identity matrix
)
Example:
m = Algebra.SquareMatrix(Rational, a.size)[ [-1, 1, 2, -1], [-5, 3, 4, -2], [3, -1, 0, 1], [5, -2, -2, 0] ] jf, p, q, field, modulus = Algebra::JordanForm.decompose(m) jf.display; puts #=> # 2, 0, 0, 0 # 0, a, 0, 0 # 0, 0, b, 0 # 0, 0, 0, -b - a p modulus #=> [a^3 + 3a - 1, b^2 + ab + a^2 + 3] print "P =\n"; p.display; puts print "P^-1 =\n"; q.display; puts m = m.convert_to(field) p jf == p * m * q #=> true
to_matrix(ring)
Returns the upper triangular Jordan matrix over ring.
Example:
j = Algebra::JordanForm.new([[2, 3], [-1, 2]]) j.to_matrix(Integer).display #=> # 2, 1, 0, 0, 0 # 0, 2, 1, 0, 0 # 0, 0, 2, 0, 0 # 0, 0, 0, -1, 1 # 0, 0, 0, 0, -1
to_matrix_r(ring)
to_matrix_l(ring)


Felicity Hannay
Democrat
Retired lawyer, retired at the end of 2004. I was associate and partner at Davis Graham & Stubbs 1975-1998 and Deputy Attorney General for Natural Resources and Environment for Colorado Attorney General Ken Salazar 1999-2004. Before law school I worked at an architecture, city and regional planning firm in Philadelphia.
Vassar College BA 1969; U of Calif at Berkeley, Boalt Hall School of Law 1975 JD
80401
I have donated to a number of Democratic candidates, and the DNC, and MoveOn since November 10, 2015. Candidates include Jason Crow, Joe Neguse, Ed Perlmutter, Diane Mitsch Bush, Ike McCorkle, John Hickenlooper, Michael Bennet, Joe Biden and Kamala Harris, and several out-of-state Democrats including Mark Kelly, MJ Hegar, Steve Bullock.
Appointed member of Jefferson County Open Space Advisory Committee (2006-2019); although before 2015, I was an appointed member of Jeffco Planning Commission 1993-1999; several committees of the Mount Vernon Country Club Metropolitan District (RealEstate and Design; Water Resources), and several terms on the Board of Directors of MVCCMD (before 2015); member of Board of Directors of three NGOs serving empowerment and education of women internationally (two in Guatemala, one in Tanzania); US Commissioner and Chair of Upper Colorado River Commission, an interstate compact commission of Colorado, Utah, Wyoming, and New Mexico, 2010-2019.
I am most proud of my significant leadership and participation with a community group of neighbors and environmental advocates to analyze and then mount a case against a poorly-conceived aggregate quarry proposal in the depths of Clear Creek Canyon that would have choked that canyon with heavy truck traffic in conflict with automobile traffic, and caused noise and dust for decades, leaving the canyon scarred forever. I quarterbacked the effort to persuade the Colorado Mined Land Reclamation Board to deny the requisite permit, and assisted in persuading the Board of County Commissioners to deny the needed change of zoning.
I believe my 45 years of work concerning legal and policy issues in Colorado give me excellent background and experience to help my state accomplish the difficult and important job of developing a fair and representative plan of redistricting. I love Colorado - my children and grandchildren live here - and I want the very best for my state. I am energetic, knowledgeable, and committed, and I hope to be able to contribute to my state in this way.
In my career as an attorney I did not litigate but rather worked in a collaborative way with my clients and government agencies to achieve mutually acceptable and favorable solutions to problems and conflicts. Similarly, as a Jeffco Planning Commissioner and Jeffco Open Space Advisory Committee member, I was known for helping adverse parties to recognize and agree to compromises.
This is a hard question to answer without sounding like a show-off! Let me give one example that I am particularly proud of. When I was Ken Salazar's Deputy at the AG's Office, I was involved in the project to try to preserve the so-called Baca Ranch in the San Luis Valley from destructive over-pumping of groundwater. Many people and organizations were involved in the effort -- AG Ken Salazar, The Nature Conservancy, Senator Wayne Allard, Representative Scott McInnis among many others. There was a thorny issue involving the handling of water rights: Senator Allard was unwilling to let the US Park Service get federal reserved water rights contrary to state law. I was able to craft language for the proposed legislation that satisfied both Senator Allard and the federal agencies, as well as the other parties involved in the effort. The result was the expanded fabulous Great Sand Dunes National Park and Preserve, a marvelous asset for Colorado.
female cisgender


Question: What is the value of foo
?
var foo = 10 + '20';
Question: What will be the output of the code below?
console.log(0.1 + 0.2 == 0.3);
Question: How would you make this work?
add(2, 5); // 7
add(2)(5); // 7
Question: What value is returned from the following statement?
"i'm a lasagna hog".split("").reverse().join("");
Question: What is the value of window.foo
?
( window.foo || ( window.foo = "bar" ) );
Question: What is the outcome of the two alerts below?
var foo = "Hello";
(function() {
var bar = " World";
alert(foo + bar);
})();
alert(foo + bar);
Question: What is the value of foo.length
?
var foo = [];
foo.push(1);
foo.push(2);
Question: What is the value of foo.x
?
var foo = {n: 1};
var bar = foo;
foo.x = foo = {n: 2};
Question: What does the following code print?
console.log('one');
setTimeout(function() {
console.log('two');
}, 0);
Promise.resolve().then(function() {
console.log('three');
})
console.log('four');
Question: What is the difference between these four promises?
doSomething().then(function () {
return doSomethingElse();
});
doSomething().then(function () {
doSomethingElse();
});
doSomething().then(doSomethingElse());
doSomething().then(doSomethingElse);
Question: What will the code below output to the console and why?
(function(){
var a = b = 3;
})();
console.log("a defined? " + (typeof a !== 'undefined'));
console.log("b defined? " + (typeof b !== 'undefined'));
Question: Consider the two functions below. Will they both return the same thing? Why or why not?
function foo1()
{
return {
bar: "hello"
};
}
function foo2()
{
return
{
bar: "hello"
};
}


Can we use data from forms to retrieve information from the Internet?
SURE!
We can create a call to a web service API for retrieving data about some resource that the service may have.
We need to deal, though, with creating the proper call and with parsing the response of the service.
Typically, API calls follow the form
http://www.domain.com:1234/path/to/resource?a=b&x=y
How can we retrieve the weather for a specific city?
Search the web for "Weather API"
According to the OpenWeather API, the call for calling the current weather data for one location by city name is:
We missed the API key!
OpenWeather returns JSON by default, but it can also return other formats (XML and HTML). How? Check their documentation!
XML
HTML
This builds on top of Exercise # 1.
You are going to provide the current weather for a user-entered city. Any city! For doing that, you are going to create a form and ask the visitor of your site for the name of a city (which was done in exercise # 1).
Then, you are going to use the OpenWeather API to retrieve the information, JS to parse the information, and HTML to render the results.


 Now, I don’t get a lot of time to do it, and when I do get to, I mostly play online. I’ve tried pretty much all of the tools out there from Roll 20, Fantasy Grounds, D&D Beyond, Discord, and combinations of all of the above.
The problem: none of them actually solve my needs.
This brings me to my current hobby project: an online game management tool. Now, the fundamental problem with Roll 20 and Fantasy Grounds is that they are relatively closed eco-systems; you really need to buy into (quite literally!) in order to make the most of it. Now, Fantasy Grounds is far more flexible and you can basically encode anything you want, it’s a lot of time to do so.
So, that’s where my project comes into play. I really like the premise around D&D Beyond, however, it’s also a fairly closed ecosystem providing no APIs to interact with it. However, since D&D Beyond is mainly a D&D Book archive, I can work with that.
Now… the goals of the project are as follows:
- Create a system that works on macOS, iOS, and Windows. My players use varied systems and I need to support all three of those.
- Create an open ecosystem where there is a fluid flow of information coming into the app and going out of the app. If you love Ulysses or Scrivener for writing your campaigns, use it! The app is to help you run your table top session, not management everything else for you.
- High performance, low battery impact. A D&D session can be 3~5 hours long and I don’t want people reaching for their chargers part way in or losing access to their character if they are on their laptop or iOS device, especially if we are at the table.
- A learning project for certain things that I just don’t know too much about, such as low-level graphics frameworks.
- The foundation for other projects that I have that I’d like to work on… secret projects.
One of the key features, if not the primary feature, is an interactive mapping environment. This is going to likely be a top-down view of a true 3D environment with dynamic lighting, character line-of-sight handling, and turn management tools (including things like measuring movement distances and area of effect areas templates).
This brings us to technology and language choices. Now, remember, this is going to be a truly cross-platform app. It also has the need of being run offline or over local-networks only.
The basic choices are:
- web-technology based, such as Electron or Atom
- game engine based, such as Unreal or Unit
- using some type of cross-platform application layer
- handmade, native app
For various reasons that I don’t really want to fully go into here, an Electron-based app is out.  Sure, WebGL is pretty good, and there is WASM, but ultimately, this is really an unproven technology for this type of application. Also, I’d need a different solution on mobile vs. desktop, which starts to complicate the picture as well.
Ok… so Unreal or Unity based? I haven’t fully rejected this idea, but it would likely only be for the map rendering portion as the vast majority of the rest my content is going to be primary text-based UIs (character sheets, rule references, story content, etc…). Unity… I’ve played around with it in the past and it just didn’t stick with me, so I’d use Unreal if I went this route. The question always is does this dependency warrant the design decisions and complexity? I’m not sure.
Cross-platform layer… no.
A native app. Now, this brings the downside of having to re-build the UI layer for each support platform, and for a hobby and one-man-team, that kinda stinks. BUT! I think it’s totally worth it. This choice also brings with it full control over all aspects of the project and how it is shaped. There’s a lot to be said about this.
Language choices: really, there is only really one option that brings straight-forward interop between the various languages choices that may come up: C.
Rust requires bindings and unsafe code; this ends up being a good amount of work to accomplish.
C++ is C++. It’s a very complex and large language. Interop with other languages can be problematic as well.
Swift, well, it’s simply not cross-platform and isn’t going to meet my needs for a Windows install. So it’s out by default.
C is the only language that brings to the table straight-forward interop with all of the platform UI languages (I’ll likely use C# for Windows and ObjC or Swift for macOS and iOS). If I use Swift and I chose C++, I’d have to write a long of interop bindings between the two and that is just a waste of time.
So I’ll be using C and the internet can collectively gasp at my choice. 😀


Hi! My name is Dhruv Aggarwal and I am a Senior studying Computer Engineering. I have programmed in various languages and have multiple projects under my belt. I have coded in C, C#, C++, Java, Python,
Matlab. I also have done some front-end development using HTML, CSS, and JavaScript. I am also proficient in SQL and data analytics. I would like to learn more about IOS and Android development.
Experience
Co-Founder @ Flyr
Aug, 2018- Aug, 2019
Established the startup to create an intelligent recommendation engine which utilizes a proprietary machine learning algorithm to connect students with organizations
My long term vision as a co-founder is to create a platform in which we can successfully recommend organizations and events for students with greater than a 90 percent accuracy
Created a landing page and coded the proprietary algorithm along with being in charge of Project Management, Team Management and Business Development
Software Engineering Intern @ AT&T
Jun, 2019 - Aug, 2019
Wrote Python Scripts to perform ETL and save $12,000 annually
Created an application to autofill fields with AJAX call
Built Exective-Level reports using PowerView on SharePoint
Software Engineering Intern @ Valiance Partners
Jun, 2018 - Aug, 2018
Generated XML to C# code generator to serialize/de-serialize the XML file
Developed user-friendly data grid to display the errors, including the usage of third-party DLL’s
Wrote and debugged complex SQL queries for Exporting/Importing data and to implement ETL across multiple databases/ data sources
Web API calls within a regulated envrionment
Machine Learning Study Abroad
Rome, Italy
May, 2018 - Jun, 2018
Studied neural networks, support vector machines, decision trees and data mining methods
Worked on intelligent information processing along with search and retrieval mechanisms
Wrote and edited algorithms for classification, recognition, prediction, and optimization
Studied machine learning tools and libraries in R, Python, and Matlab
Research in Aerial Robotics
Jan, 2018 - May, 2018
Developed an autopilot algorithm on MATLAB for takeoff and landing of an UAV
Identified waypoints and targets for testing the algorithm in complex scenarios
Simulated and tested the algorithm on X-Plane to assess real time compatibility and avoid


Case study to find out variation of fuel consumption with relative to the variations of the route has been performed. While preparing inventory as mention in early fuel consumption is the factor that concern as basis, there for case study was to collect fuel consumed volume between two stations. Afterward find out factors according to the variation of the route.
While in the planning stage of this case study, there were few problem that has to encounter with. Main problem is that there are no fuel meters in locomotives or diesel multiple units with the required sensitivity. Only in the S12 DMUs are with gauge in diesel tank [14]. Hence only option is to follow the case study for the S12 DMU.
Case study was performed in 21st of February 2015 with the permission of Mr Dilantha Fernando who is the chief engineer of motive power department of Sri Lanka Railway. Case study begins at 5.15 am from the S12 DMUs shed. Performed DMUs locomotive numbers are 923 and 925 which was named as Podimanike train which is having train number of 1005.
For the case study, our target is to collect diesel consumption volumes between stations. Over that to map the speed variations of the journey GPS tracker has been used. Using of tracker is not only to track speed variation but also to map the railway track. Following image shoes the speed profile and altitude profile of the journey.
To measure fuel consumption volume, gauge has been used. While leaving the locomotive from the shed fuel level has been marked in both tanks. Afterwards from every station fuel level has been recorded. Following tables shows the data collection and methodology that used to find out the factor which affect to fuel consumption along the road.
Station stoped |
distance from colombo fort |
distance between following station |
reading tank 1 |
reading tank 2 |
fuel consiumed t1 |
fuel consiumed t2 |
rate of cnsmp t1 l/km |
rate of cnsmp t2 l/km |
total consumption rate |
Colombo Fort |
0 |
0 |
0 |
0 |
0 |
||||
Ragama Junction |
16.42 |
16.42 |
4 |
4 |
28 |
28 |
1.71 |
1.71 |
3.41 |
Gampaha |
28.4 |
11.98 |
3 |
3 |
21 |
21 |
1.75 |
1.75 |
3.51 |
Veyangoda |
38.3 |
9.9 |
2 |
2 |
14 |
14 |
1.41 |
1.41 |
2.83 |
Meerigama |
51.04 |
12.74 |
3 |
2 |
21 |
14 |
1.65 |
1.10 |
2.75 |
Alawwa |
66.48 |
15.44 |
4 |
4 |
28 |
28 |
1.81 |
1.81 |
3.63 |
Polgahawela Junction |
73.91 |
7.43 |
2 |
2 |
14 |
14 |
1.88 |
1.88 |
3.77 |
Rambukkana |
85.14 |
11.23 |
4 |
3 |
28 |
21 |
2.49 |
1.87 |
4.36 |
Ihala Kotte |
96.74 |
11.6 |
4 |
4 |
28 |
28 |
2.41 |
2.41 |
4.83 |
Pilimatalawa |
109.94 |
13.2 |
4 |
5 |
28 |
35 |
2.12 |
2.65 |
4.77 |
Kandy |
119.5 |
9.56 |
3 |
3 |
21 |
21 |
2.20 |
2.20 |
4.39 |
sum |
119.5 |
33 |
32 |
231 |
224 |
In this DMU, two diesel engines are available. Each of is having 3500l diesel tank. Inside height of the tank (height of the gauge) is 500mm. there for 1 mm would represent displacement of 7l volume. From that following multiplication factors has been derived. Factor that has been used is derived by dividing fuel consumption between two stations from average fuel consumption [14].
$$ Multiplication factor = \frac{fuel consumption rate between following station }{ average fuel consumption} $$Station stoped |
multiplication factor |
Colombo fort to Ragama Junction |
0.90 |
Raagama junction to Gampaha |
0.92 |
Gampaha to Veyangoda |
0.74 |
Veyangoda to Meerigama |
0.72 |
Meerigama to Alawwa |
0.95 |
Alawwa to Polgahawela Junction |
0.99 |
Polgahawela junction to Rambukkana |
1.15 |
Rambukkana to Ihala Kotte |
1.27 |
Ihala kotte to Pilimatalawa |
1.25 |
Pilimathalawa to Kandy |
1.15 |
With the details that has been found from the case study, emission inventory has been updated. That has been done by multiplying the average fuel consumed volume by the factor.
Drawback of this method is that this case study has been performed only for one locomotive type. But SLR having over 12 types of locomotive, other than that S12 locomotive is the latest locomotive available in Sri Lanka which is imported in 2012, there are some locomotives manufactured in 1950s which are still in operation. Other change is that locomotives are imported from different manufacturers. Some are from Canada, Germany, china, India and France. Above factors can be make changes for the fuel consumption factor.


This library is built on top of two common libraries, also built by Google, but designed to work with any HTTP service on the web: the Google HTTP Client Library for Java and the Google OAuth Client Library for Java. @see Google HTTP Java Client Library Javadoc @see Google OAuth Java Client Library Javadoc


| Number of Classes | Line Coverage | Mutation Coverage |
|---|---|---|
| 138 | 88% | 80% |
| Name | Number of Classes | Line Coverage | Mutation Coverage |
|---|---|---|---|
| org.joda.time | 35 | 95% |
94% |
| org.joda.time.base | 12 | 98% |
95% |
| org.joda.time.chrono | 31 | 79% |
68% |
| org.joda.time.convert | 13 | 98% |
89% |
| org.joda.time.field | 25 | 80% |
71% |
| org.joda.time.format | 14 | 89% |
76% |
| org.joda.time.tz | 8 | 81% |
68% |


The place where photographers and models find their perfect partner. View, contact, meet, shoot.
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Lorem ipsum dolor sit amet, consectetur.
Chief Technical Officer
CEO & Co-Founder
Business Manager
Graphic Designer
Chief Technical Officer
CEO & Co-Founder
Business Manager
Graphic Designer
Chief Technical Officer
CEO & Co-Founder
Business Manager
Graphic Designer


Robust Small Area Estimation. Robust Basic Unit- and Area-Level Models
| Version: | 0.1-5 |
| Suggests: | robustbase, nlme |
| Published: | 2014-02-13 |
| Author: | Tobias Schoch |
| Maintainer: | Tobias Schoch <tobias.schoch at gmail.com> |
| License: | GPL-2 | GPL-3 | FreeBSD [expanded from: GPL (≥ 2) | FreeBSD] |
| NeedsCompilation: | yes |
| Citation: | rsae citation info |
| In views: | OfficialStatistics |
| CRAN checks: | rsae results |
| Reference manual: | rsae.pdf |
| Vignettes: |
rsae: Robust Small Area Estimation |
| Package source: | rsae_0.1-5.tar.gz |
| Windows binaries: | r-devel: rsae_0.1-5.zip, r-release: rsae_0.1-5.zip, r-oldrel: rsae_0.1-5.zip |
| OS X binaries: | r-release: rsae_0.1-5.tgz, r-oldrel: rsae_0.1-5.tgz |
| Old sources: | rsae archive |
| Reverse suggests: | spaMM |
Please use the canonical form https://CRAN.R-project.org/package=rsae to link to this page.


§143-19 Penalty. Any person violating any of the provisions of this chapter for which no special penalty is provided shall be fined not more than $50. [L 1941, c 268, §18; RL 1945, §7168; RL 1955, §156-19; HRS §143-19]


There is no hope.
You can't stop me...
THERE IS NO HELP! You can try your best to escape, but you'll find no way out. Are you sure this web page is even real?
I
AM
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IN


SnO B-SFO@C carbon Figure metal electrode lithium capacity high anode materials Wang ion storage batteries Zhang electrochemical stress rate {border-style mAh nanoparticles B-SFO conversion density px;} #ffffff;} B-SO@C Chem. lithium-ion Liu reaction reversible surface Mater. binary cyclic matrix performance structural cycling electrodes energy hollow structure Chen battery cycles oxide SEI composite corresponding image material volume TEM Zhou current different diffraction morphological properties Energy Yang electron large low spectra ./j.jpowsour... active charge compact electronic formation high-rate superior using -based Cao Huang Power SEM bulk embedded excellent initial inside potential px; structures {font-family -Fe Adv. Batteries Cheng Lithium discharge evolution font-size fresh graphene long-term oxides particles pattern range respectively, sample; small substances ultrafine .–. B-SFO@C, Besides, Eng. HRTEM Jiang Nano XPS Zhao acid addition, composites conductivity cycle double; exceptional fitted good high-performance images irreversible lattice layer materials, monolith porous respectively. results retention shown size spectroscopy spectrum stability state tap (inset), ./j.cej... /Fe /SnO Anode Carbon EIS Electrochemical Li-ion Lithium-Ion Materials Raman SAED Source Sun X-ray [], amorphous anodes aqueous average border-color border-width chemical chemistry electric elevated enhanced field film full-charged great highly integrity intercalation ions long lower metals monolithic nanocrystals nanotubes novel peaks performances phase phases poor process result reveals rings sample similar situ solid; solution unique volumetric work working wrapped {font-style {font-weight ./j.nanoen... /TM B-SFO@C. C@SnO Choi High-Performance ICE Ion J.S. LIBs. Low-resolution Nanomaterials Nanoscale Sn-based Soc. Storage Table X.W. access bold bulk-like capability content courier; crystal curves cycle, cycled cycles. cycling, deal discharge/charge effectively electroactive electrode, electrode. electrodes, em; features framework function gain gel hierarchical host hybrid improved indicates indicating inducing inherently layers layers, lithiation management mesoporous microscopy morphologic nanosized nanospheres nanotube or/and oxalic potentials production products pt;} pure ratio relatively relaxation resistance resulting roughly scan sodium-ion space spherical stable that, tin trigger various weight


Client-side CoffeeKup (regular)
Writing your app and templates in CoffeeScript but pre-compiling everything on the server-side.


Pizzaeria Port
Customer Information:
Name
Phone number
Address
Size:
Small
Medium
Large
Extra Large
Toppings:
Pepperoni
Sausage
Canadian Bacon
Mushroom
Onion
Green Pepper
Quantity:
Place order
Review Orders:


The Open Bank Project is an open source API and App store for banks that empowers financial institutions to securely and rapidly enhance their digital offerings using an ecosystem of 3rd party applications and services.
Bring innovation to your door and quickly deliver a greater range of apps and services.
Learn more
Build the next generation of banking apps and deploy to a wide range of banks.
Learn more
Enjoy a wide range of banking applications that address your needs and appeals to you!
Learn more
Raise the bar of financial transparency and unlock an untapped innovation potential.
Learn more
You can meet us at the following events:
What they say about the Open Bank Project.


| PostgreSQL 9.0.10 Documentation | ||||
|---|---|---|---|---|
| Prev | Up | Chapter 18. Server Configuration | Next |
In addition to the postgresql.conf file already mentioned, PostgreSQL uses two other manually-edited configuration files, which control client authentication (their use is discussed in Chapter 19). By default, all three configuration files are stored in the database cluster's data directory. The parameters described in this section allow the configuration files to be placed elsewhere. (Doing so can ease administration. In particular it is often easier to ensure that the configuration files are properly backed-up when they are kept separate.)
Specifies the directory to use for data storage. This parameter can only be set at server start.
Specifies the main server configuration file (customarily called postgresql.conf). This parameter can only be set on the postgres command line.
Specifies the configuration file for host-based authentication (customarily called pg_hba.conf). This parameter can only be set at server start.
Specifies the configuration file for Section 19.2 user name mapping (customarily called pg_ident.conf). This parameter can only be set at server start.
Specifies the name of an additional process-id (PID) file that the server should create for use by server administration programs. This parameter can only be set at server start.
In a default installation, none of the above parameters are set explicitly. Instead, the data directory is specified by the -D command-line option or the PGDATA environment variable, and the configuration files are all found within the data directory.
If you wish to keep the configuration files elsewhere than the data directory, the postgres -D command-line option or PGDATA environment variable must point to the directory containing the configuration files, and the data_directory parameter must be set in postgresql.conf (or on the command line) to show where the data directory is actually located. Notice that data_directory overrides -D and PGDATA for the location of the data directory, but not for the location of the configuration files.
If you wish, you can specify the configuration file names and locations individually using the parameters config_file, hba_file and/or ident_file. config_file can only be specified on the postgres command line, but the others can be set within the main configuration file. If all three parameters plus data_directory are explicitly set, then it is not necessary to specify -D or PGDATA.
When setting any of these parameters, a relative path will be interpreted with respect to the directory in which postgres is started.


Aurora cinema
-
cinema is divided into three halls: "Big" for 390 people, "Azure" for 252 seats and a superior room
for 116 visitors.
Cinema has already been modernized several times, now professional equipment is installed in the halls
global manufacturers: acoustics Electro Voice and JBL, processors Dolby CP 500D and Dolby CP 650. In combination with new projectors,
which is equipped
cinema , all this makes it possible to perfectly transmit and reproduce both the sound and the image during
watching movies.


|
This is how items are being classified in the codeforamerica github Taxonomy repo.
This tree is populated from the json returned by the Taxonomy API at https://api.taxonomy.sandbox.k8s.brigade.cloud/taxonomy Categorization is still a working in progress, changes needs to be done via PR in the repo and ideally one day with a tool/idea like a graphical editor. Empty folders are because there is a category in the taxonomy project but we didn't find a good use of it yet. |
|
|


What is CoronaVirus?
Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus that attacks the respiratory track of a person. The COVID-19 virus spreads primarily through droplets of saliva or discharge from the nose when an infected person coughs or sneezes, so it’s important that you also practice respiratory etiquette (for example, by coughing into a flexed elbow). At this time, there are no specific vaccines or treatments for COVID-19. However, there are many ongoing clinical trials evaluating potential treatments.


Lesson 3 Hello world
Just testing.
https://bbest.github.io/calcoastpoll-analysis
3.1 Create index.html
By default index.html
is served up. Go ahead and create a new file named index.html
with the following basic HTML:
<!DOCTYPE html>

My First Heading

My first paragraph.

Per pages.github.com, since this will be a project site only web files in the gh-pages
branch will show up at http://USER.github.io/REPO
. For a user (or organization) site, the REPO must be named USER.github.io
(or ORG.github.io
) and then the default master
branch will contain the web files for the website http://USER.github.io
(or http://ORG.github.io
). See also User, Organization, and Project Pages - Github Help.
You’ll be prompted to clone this repository into a folder on your local machine.
See GitHub Desktop User Guides for more. You could also do this from the Bash Shell for Git with the command git clone https://github.com/USER/REPO.git
, replacing USER with your Github username and REPO with my_project. Or you can use the Github Desktop App menu File -> Clone Repository…
3.2 Setup Git
Configure git with global commands. Open up the Git Bash on Windows, or Terminal on Mac and type the following on the command line, replacing:
# display your version of git git --version # replace USER with your Github user account git config –-global user.name USER # replace<EMAIL_ADDRESS>with the email you used to register with Github git config –-global user.email<EMAIL_ADDRESS># list your config to confirm user.* variables set git config --list
3.3 Github Workflows
The two most common workflow models for working Github repositories is based on your permissions:
writable: Push & Pull (simplest)
read only: Fork & Pull Request (extra steps)
We will only go over the first writable mode. For more on the second mode, see Forking Projects · GitHub Guides.
3.4 Create RStudio Project with Git Repository
Next, you will clone the repository onto your local machine using RStudio. I recommend creating it in a folder github
under your user or Documents folder.
Open RStudio and under the menu File -> New Project… -> Version Control -> git and enter the URL with the .git
extension (also available from the repository’s Clone button):
If it all works correctly then you should see the files downloaded and showing up in the Files pane of RStudio. If RStudio is configured correctly to work with Git, then you should also see a Git pane.
3.5 Create index.Rmd
in Rmarkdown
Back in RStudio, let’s create a new Rmarkdown file, which allows us to weave markdown text with chunks of R code to be evaluated and output content like tables and plots.
File -> New File -> Rmarkdown… -> Document of output format HTML, OK.
You can give it a Title of “My Project”. After you click OK, most importantly File -> Save as index
(which will get named with the filename extension index.Rmd
).
Some initial text is already provided for you. Let’s go ahead and “Knit HTML”.
Notice how the markdown is rendered similar to as before + R code chunks are surrounded by 3 backticks and {r LABEL}
. These are evaluated and return the output text in the case of summary(cars)
and the output plot in the case of plot(pressure)
.
Notice how the code plot(pressure)
is not shown in the HTML output because of the R code chunk option echo=FALSE
.
Before we continue exploring Rmarkdown, visit the Git pane, check all modified (M) or untracked (?) files, click Commit, enter a message like “added index” and click the “Commit” button. Then Push (up green arrow) to push the locally committed changes on your lapto up to the Github repository online. This will update https://github.com/USER/nps-demo, and now you can also see your project website with a default index.html
viewable at http://USER.github.io/nps-demo
For more on Rmarkdown:
A more advanced topic worth mentioning is dealing merge conflicts
3.6 Exercise: Intertidal Sites Dataset
Gil Rilov shared the following dataset for us to play with:
Please download and open this dataset. Your task is to investigate this dataset and prepare it for submission to OBIS.
3.6.1 Task: Provide Excel cell ranges for how you would divide data into tables?
For reading and wrangling data in R, please see cheat sheets and resources mentioned in:


Autolab Virtual Machine Images
| VM image | Courses using this image | Comments |
|---|---|---|
| rhel.img | 15-112, 15-213 | Standard Andrew RHEL6 Linux image |
| rhel122.img | 15-122 | Andrew image with C0 |
| rhel210.img | 15-210, 15-150 | Andrew image with SML and LLVM |
| rhel-02.img | 15-440 | Andrew image with Go |
| rhel61compilers-01.img | 15-411 | Andrew image with SML |
| rhelfuse.img | 15-746 | Andrew image with fuse module |
| rhel18732.img | 18-732 | Andrew image with client and server users |


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LIVE BETTER (The Great Atlantic & Pacific Tea Company)
Disclaimer: Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies. FDA has not evaluated whether this product complies.
*Compare to the active ingredient in Phazyme® Ultra Strength
Ultra Strength
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*This product is not manufactured or distributed by C.B. Fleet Company Inc., distributor of Phazyme®.
DISTRIBUTED BY ONPOINT, INC.
2 PARAGON DRIVE
MONTVALE, NJ 07645
TAMPER EVIDENT: DO NOT USE IF IMPRINTED SAFETY SEAL UNDER CAP IS BROKEN OR MISSING.
KEEP OUTER CARTON FOR COMPLETE WARNINGS AND PRODUCT INFORMATION.
|
GAS RELIEF
ULTRA STRENGTH simethicone capsule, liquid filled | ||||||||||||||||||||
| ||||||||||||||||||||
| ||||||||||||||||||||
| ||||||||||||||||||||
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| ||||||||||||||||||||
|
| Labeler - LIVE BETTER (The Great Atlantic & Pacific Tea Company) (001367366) |
| Registrant - P and L Development of New York Corporation (800014821) |


Ah! Much better.
Kill the nausea of bad styling. Restore sane, readable defaultsthat won't make you vomit.
Download Transcendence.


Migration run result
This migration tool is run against the application :applname. of type :appltype..
The tool is run at :timestamp..
Generated files
These are the files that are stored in :tgtdir.. Some of these files may have to be modified manually as listed below:
Deploying application to :tgttype.
Perform the following actions:
- You can setup environtment variables to make it easy to run the commands listed here:
- The docker image repository host (and port) that you will use such as docker.io for DockerHub, or .icr.io or other repository hosts. export REPOHOST=docker.io
- The namespace that you will store this image to. export REPOSPACE=mynamespace
:envvar.
- Go to the conversion path directory cd :tgtdir.
- Generate the docker image:docker build -t :applname. .
- Tag the docker image for a docker repository that is accessible to the cluster.docker tag :applname. ${REPOHOST}/${REPOSPACE}/:applname.
- Store the docker image into a docker repository that is accessible to the cluster.docker login ${REPOHOST} docker push ${REPOHOST}/${REPOSPACE}/:applname.
:deployapp.


About project
Inspired by the lack of automation in education,
this project aims to create automated quiz generator on any topic available online.
As this project is part of final year project from Swansea University, it will we under development until 2021 July.
Disclaimer
This website relies on producing quizzes based on Wikipedia articles. User
judgement when choosing a topic is advised as there is no filtering in place to
prevent incorrect or hurtful content from being generated.


OpenVidu Server CDR
OpenVidu Server offers a CDR logging system, so you can easily keep record of every session, every user connecting to them and every media connection established by each one of the users (sending or receiving). To start OpenVidu Server with CDR enabled, launch it with option openvidu.cdr=true
. The CDR file will be located under log/
folder in the same path as your Java executable.
The record is a plain text file containing one standard JSON entry for each line. All JSON entries have the following structure:
{"EVENT_NAME": {"sessionId": "SESSION_ID", "timestamp": TIMESTAMP, "PROP_1": "VALUE_1","PROP_2": "VALUE_2", ... }}
So every entry is a JSON object identified by a specific event name, and all of them have as properties the sessionId
identifying the video-session for which this event was registered and the timestamp
. Besides this two common properties, there are custom properties for every specific event with useful information. The complete list of possible JSON entries is available below:
Events in OpenVidu CDR
- sessionCreated
- sessionDestroyed
- participantJoined
- participantLeft
- webrtcConnectionCreated
- webrtcConnectionDestroyed
- recordingStarted (removed in OpenVidu 2.11.0. Use recordingStatusChanged)
- recordingStopped (removed in OpenVidu 2.11.0. Use recordingStatusChanged)
- recordingStatusChanged (from OpenVidu 2.11.0)
- filterEventDispatched (from OpenVidu 2.12.0)
sessionCreated
Recorded when a new session has been created.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
Example:
{"sessionCreated":{"sessionId":"fds4e07mdug1ga3h","timestamp":1538481330577}}
sessionDestroyed
Recorded when a session has finished.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
startTime |
Time when the session started | UTC milliseconds |
duration |
Total duration of the session | Seconds |
reason |
Why the session was destroyed | ["lastParticipantLeft" ,"sessionClosedByServer" ,"openviduServerStopped" ] |
Example:
{"sessionDestroyed":{"sessionId":"fds4e07mdug1ga3h","timestamp":1538481699154,"startTime":1538481330577,"duration":368,"reason":"lastParticipantLeft"}}
participantJoined
Recorded when a user has connected to a session.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
participantId |
Identifier of the participant | A string with the participant unique identifier |
location |
Geo location of the participant PRO |
A string with format "CITY, COUNTRY" (or "unknown" ) |
platform |
Complete description of the platform used by the participant to connect to the session | A string with the platform description |
clientData |
Metadata associated to this participant from the client side. This corresponds to parameter metadata of openvidu-browser method Session.connect |
A string with the participant client-side metadata (generated when calling Session.connect method) |
serverData |
Metadata associated to this participant from the server side. This corresponds to parameter data of REST API operation POST /api/tokens or its Java/Node server SDKs variants |
A string with the participant server-side metadata (generated with the token) |
Example:
{"participantJoined":{"sessionId":"ses_SuXO99zeb1","timestamp":1584008771500,"participantId":"con_ZTMYOmVuZB","location":"Berlin, Germany","platform":"Chrome 80.0.3987.132 on Linux 64-bit","clientData":"Mike","serverData":"{'user': 'client1'}"}}
participantLeft
Recorded when a user has left a session.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
participantId |
Identifier of the participant | A string with the participant unique identifier |
location |
Geo location of the participant PRO |
A string with format "CITY, COUNTRY" (or "unknown" ) |
platform |
Complete description of the platform used by the participant to connect to the session | A string with the platform description |
clientData |
Metadata associated to this participant from the client side. This corresponds to parameter metadata of openvidu-browser method Session.connect |
A string with the participant client-side metadata (generated when calling Session.connect method) |
serverData |
Metadata associated to this participant from the server side. This corresponds to parameter data of REST API operation POST /api/tokens or its Java/Node server SDKs variants |
A string with the participant server-side metadata (generated with the token) |
startTime |
Time when the participant joined the session | UTC milliseconds |
duration |
Total duration of the participant's connection to the session | Seconds |
reason |
How the participant left the session | ["disconnect" ,"forceDisconnectByUser" ,"forceDisconnectByServer" ,"sessionClosedByServer" ,"networkDisconnect" ,"openviduServerStopped" ] |
Example:
{"participantLeft":{"sessionId":"ses_SuXO99zeb1","timestamp":1584009224993,"startTime":1584008771500,"duration":453,"reason":"disconnect","participantId":"con_ZTMYOmVuZB","location":"Berlin, Germany","platform":"Chrome 80.0.3987.132 on Linux 64-bit","clientData":"Mike","serverData":"{'user': 'client1'}"}}
webrtcConnectionCreated
Recorded when a new media stream has been established. Can be an "INBOUND" connection (the user is receiving a stream from a publisher of the session) or an "OUTBOUND" connection (the user is a publishing a stream to the session).
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
participantId |
Identifier of the participant | A string with the participant unique identifier |
connection |
Whether the media connection is an inbound connection (the participant is receiving media from OpenVidu) or an outbound connection (the participant is sending media to OpenVidu) | ["INBOUND" ,"OUTBOUND" ] |
receivingFrom |
If connection is "INBOUND" , the participant from whom the media stream is being received |
A string with the participant (sender) unique identifier |
audioEnabled |
Whether the media connection has negotiated audio or not | [true ,false ] |
videoEnabled |
Whether the media connection has negotiated video or not | [true ,false ] |
videoSource |
If videoEnabled is true , the type of video that is being transmitted |
["CAMERA" ,"SCREEN" ] |
videoFramerate |
If videoEnabled is true , the framerate of the transmitted video |
Number of fps |
videoDimensions |
If videoEnabled is true , the dimensions transmitted video |
String with the dimensions (e.g. "1920x1080" ) |
Example:
{"webrtcConnectionCreated":{"sessionId":"fds4e07mdug1ga3h","timestamp":1538481419726,"participantId":"ges2furjsjjmyi0b","connection":"INBOUND","receivingFrom":"wsalcr1r72goj8sk","videoSource":"CAMERA","videoFramerate":30,"videoDimensions":"{\"width\":640,\"height\":480}","audioEnabled":true,"videoEnabled":true}}
webrtcConnectionDestroyed
Recorded when any media stream connection is closed.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
participantId |
Identifier of the participant | A string with the participant unique identifier |
connection |
Whether the media connection is an inbound connection (the participant is receiving media from OpenVidu) or an outbound connection (the participant is sending media to OpenVidu) | ["INBOUND" ,"OUTBOUND" ] |
receivingFrom |
If connection is "INBOUND" , the participant from whom the media stream is being received |
A string with the participant (sender) unique identifier |
audioEnabled |
Whether the media connection has negotiated audio or not | [true ,false ] |
videoEnabled |
Whether the media connection has negotiated video or not | [true ,false ] |
videoSource |
If videoEnabled is true , the type of video that is being transmitted |
["CAMERA" ,"SCREEN" ] |
videoFramerate |
If videoEnabled is true , the framerate of the transmitted video |
Number of fps |
videoDimensions |
If videoEnabled is true , the dimensions transmitted video |
String with the dimensions (e.g. "1920x1080" ) |
startTime |
Time when the media connection was established | UTC milliseconds |
duration |
Total duration of the media connection | Seconds |
reason |
How the WebRTC connection was destroyed | ["unsubscribe" ,"unpublish" ,"disconnect" ,"forceUnpublishByUser" ,"forceUnpublishByServer" ,"forceDisconnectByUser" ,"forceDisconnectByServer" ,"sessionClosedByServer" ,"networkDisconnect" ,"openviduServerStopped" ,"mediaServerDisconnect" ] |
Example:
{"webrtcConnectionDestroyed":{"sessionId":"fds4e07mdug1ga3h","timestamp":1538481449060,"startTime":1538481419726,"duration":29,"reason":"disconnect","participantId":"ges2furjsjjmyi0b","connection":"INBOUND","receivingFrom":"wsalcr1r72goj8sk","videoSource":"CAMERA","videoFramerate":30,"videoDimensions":"{\"width\":640,\"height\":480}","audioEnabled":true,"videoEnabled":true}}
recordingStarted
REMOVED IN OPENVIDU 2.11.0. Use recordingStatusChanged
Recorded when a new session has started to be recorded
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
id |
Unique identifier of the recording | A string with the recording unique identifier |
name |
Name given to the recording file | A string with the recording name |
outputMode |
Output mode of the recording (COMPOSED or INDIVIDUAL ) |
A string with the recording output mode |
hasAudio |
Wheter the recording file has audio or not | [true ,false ] |
hasVideo |
Wheter the recording file has video or not | [true ,false ] |
recordingLayout |
The type of layout used in the recording. Only defined if outputMode is COMPOSED and hasVideo is true |
A RecordingLayout value (BEST_FIT, PICTURE_IN_PICTURE, CUSTOM ...) |
resolution |
Resolution of the recorded file. Only defined if outputMode is COMPOSED and hasVideo is true |
A string with the width and height of the video file in pixels. e.g. "1280x720" |
size |
The size of the video file | 0 |
duration |
Duration of the video file | 0 |
Example:
{"recordingStarted":{"sessionId":"TestSession","timestamp":1549015630563,"id":"TestSession","name":"MyRecording","outputMode":"COMPOSED","hasAudio":false,"hasVideo":true,"recordingLayout":"BEST_FIT","resolution":"1920x1080","size":0,"duration":0.0}}
recordingStopped
REMOVED IN OPENVIDU 2.11.0. Use recordingStatusChanged
Recorded when a new session has stopped being recorded
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
startTime |
Time when the stopped recording started | UTC milliseconds |
id |
Unique identifier of the recording | A string with the recording unique identifier |
name |
Name given to the recording file | A string with the recording name |
outputMode |
Output mode of the recording (COMPOSED or INDIVIDUAL ) |
A string with the recording output mode |
hasAudio |
Wheter the recording file has audio or not | [true ,false ] |
hasVideo |
Wheter the recording file has video or not | [true ,false ] |
recordingLayout |
The type of layout used in the recording. Only defined if outputMode is COMPOSED and hasVideo is true |
A RecordingLayout value (BEST_FIT, PICTURE_IN_PICTURE, CUSTOM ...) |
resolution |
Resolution of the recorded file. Only defined if outputMode is COMPOSED and hasVideo is true |
A string with the width and height of the video file in pixels. e.g. "1280x720" |
size |
The size of the video file | Bytes |
duration |
Duration of the video file | Seconds |
reason |
Why the recording stopped | ["recordingStoppedByServer" ,"lastParticipantLeft" ,"sessionClosedByServer" ,"automaticStop" ,"openviduServerStopped" , "mediaServerDisconnect" ] |
Example:
{"recordingStopped":{"sessionId":"TestSession","timestamp":1549015640859,"startTime":1549015630563,"id":"TestSession","name":"MyRecording","outputMode":"COMPOSED","hasAudio":false,"hasVideo":true,"recordingLayout":"BEST_FIT","resolution":"1920x1080","size":617509,"duration":5.967,"reason":"recordingStoppedByServer"}}
recordingStatusChanged
Recorded when the status of a recording has changed. The status may be:
started
: the session is being recorded. This means the associated video(s) already exists and its size is greater than 0. NOTE: when using COMPOSED recording with video, this event does not mean there are publisher's streams being recorded in the video file. It only ensures the video file exists and its size is greater than 0stopped
: the recording process has stopped and files are being processed. The recording entity's duration and size properties will still be set to 0.ready
: the recorded file has been successfully processed and is available for download. The recording entity's duration and size properties are properly defined nowfailed
: the recording process has failed. The final state of the recorded file cannot be guaranteed to be stable
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
startTime |
Time when the recording started | UTC milliseconds |
id |
Unique identifier of the recording | A string with the recording unique identifier |
name |
Name given to the recording file | A string with the recording name |
outputMode |
Output mode of the recording (COMPOSED or INDIVIDUAL ) |
A string with the recording output mode |
hasAudio |
Wheter the recording file has audio or not | [true ,false ] |
hasVideo |
Wheter the recording file has video or not | [true ,false ] |
recordingLayout |
The type of layout used in the recording. Only defined if outputMode is COMPOSED and hasVideo is true |
A RecordingLayout value (BEST_FIT, PICTURE_IN_PICTURE, CUSTOM ...) |
resolution |
Resolution of the recorded file. Only defined if outputMode is COMPOSED and hasVideo is true |
A string with the width and height of the video file in pixels. e.g. "1280x720" |
size |
The size of the video file. 0 until status is stopped | Bytes |
duration |
Duration of the video file. 0 until status is stopped | Seconds |
status |
Status of the recording | ["started" ,"stopped" ,"ready" ,"failed" ] |
reason |
Why the recording stopped. Only defined when status is stopped or ready | ["recordingStoppedByServer" ,"lastParticipantLeft" ,"sessionClosedByServer" ,"automaticStop" ,"openviduServerStopped" , "mediaServerDisconnect" ] |
Example:
{"recordingStatusChanged":{"sessionId":"TestSession","timestamp":1549015640859,"startTime":1549015630563,"duration":5.967,"id":"TestSession","name":"MyRecording","outputMode":"COMPOSED","hasAudio":true,"hasVideo":true,"recordingLayout":"BEST_FIT","resolution":"1920x1080","size":617509,"status":"stopped","reason":"sessionClosedByServer"}}
filterEventDispatched
From OpenVidu 2.12.0
Recorded when a filter event has been dispatched. This event can only be triggered if a filter has been applied to a stream and a listener has been added to a specific event offered by the filter. See Voice and video filters to learn more.
| Property | Description | Value |
|---|---|---|
sessionId |
Session for which the event was triggered | A string with the session unique identifier |
timestamp |
Time when the event was triggered | UTC milliseconds |
participantId |
Identifier of the participant | A string with the participant unique identifier |
streamId |
Identifier of the stream for which the filter is applied | A string with the stream unique identifier |
filterType |
Type of the filter applied to the stream | A string with the type of filter |
eventType |
Event of the filter that was triggered | A string with the type of event |
data |
Data of the filter event | A string with the data returned by the filter event. Its value will depend on the type of filter and event |
Example:
{"filterEventDispatched":{"sessionId":"TestSession","timestamp":1568645808285,"participantId":"oklnb2wgsisr0sd3","streamId":"oklnb2wgsisr0sd3_CAMERA_GXTRU","filterType":"ZBarFilter","eventType":"CodeFound","data":"{timestampMillis=1568645808285, codeType=EAN-13, source=23353-1d3c_kurento.MediaPipeline/1f56f4a5-807c-71a30d40_kurento.ZBarFilter, type=CodeFound, value=0012345678905, tags=[], timestamp=1568645808}"}}


Calculates the spatial size of the output volume of a convolution kernel.
Calculates the spatial size of the output volume of a convolution kernel when using Tensorflow.


Vendor Name:
INROUND INNOVATIONS INC.
Reference Number:
8030690
Contract Date:
2016-18-01
Description of Work:
0499 Other Professional Services Not Elsewhere Specified
Contract Period:
2016-18-01 to 2016-31-05
Delivery Date:
2016-31-05
Original Contract Value:
$15,119.40
Current Contract Value:
$61,989.54
Comments:
This contract is a call-up against a Public Services and Procurement Canada procurement tool. This contract is a multi-year contract and includes one or more amendments.
Former Public Servant in Receipt of a Pension under the Public Service Superannuation Act:
No


Schreib.
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--- layout: post-classic title: "Website 2.0" desc: "Finally the new website is up at running, some features might not be up jet, but progress has been made and numerous improvements have been implemented." thumbnail: "5b9f9d2df0c5cd9534343b5bca580665.png" categories: article tags: {} ---
As for improvements the website not only displays a sense of competence, but carefull consideration for color schemes and new web standarts.
As for actual differences I've firstly switched from my own CMS system to Joomla (whether that was the right decision is questionable).
There is also now responsive design across the entire site, being designed mobile first. Abviously this would require some good css and as for general elements I've used some Bootstrap for a few elements and SCSS for my own sections.
The color scheme has also been updated, which took longer then expected, since I'm terrible with colors. Although I'm quite satisfied with the result I do have to thank the other creaters for doing the hard work for me (espessialy http://ourlittleprojects.com/).
Starting from scrath again did also improve the general structure of the site, now making it more of a portfolio rather than just a fun project.


{% extends "layout.html" %}
{% block page_title %}
Money Claims Prototype
{% endblock %}
{% block proposition_header %}
{% set my_account="2" %}
{% include "includes/propositional_navigation.html" %}
{% endblock %}
{% block content %}
{% include "includes/phase_banner_beta.html" %}
Back
Check your answers before submitting
|
Reference number
|
BRS-000000000000
|
Change
|
|
When did it start
|
12 May 2021
|
Change
|
| What type is it
|
Standard breathing space
|
Change
|
| Expected end date
|
12 July 2021
|
Change
|
{% include 'prototypes/features-to-be-built/includes/contact.html' %}
{% endblock %}


Generate Colormaps from the Color Brewer database.
Parameters
Category UIOptionMenu type of colormap Select Colormap by UIradioOption order to list available colourmaps No of Colors / Name UIoptionMention number of colours or name of colormap Stepped UItoggle colors a descrete if checked colormap colormaps available Output Ports
CB_Datamap Datamap datamap object of the selected Color Brewer colormap
This macro generates highly intuitive colormaps that take into account human perception of colors, their tone and intensity. The macro uses the ColorBrewer database (a .csv file) and presents a list of colormaps from the users parameters. The user can then easily select the colormap closest to their need. ColorBrewer is an online tool for generating colormaps primarily looking at map data but can be used with any type of data and provides much better interpretation of the data than the standard visualization colormaps.
Category
There are three categories qualitative(qual), sequential(seq) and diverging(div). Qualitative are for data that represents labels rather than quantitative values. Sequential for quantitative data that goes from a minimum to a max values. Diverging colormaps are for values that a based around some sort of average.
Select Colormaps by
Choose the colormap by its name or number of colors
No of Colors / Name
Select the number of colors or the name of the colormaps to list. This widget changes depending on what Select Colormaps by is set to.
Stepped
By default the colourmaps are continous ie the color for any value is interperted between the nearest key colors. Otherwise the colormap is descrete and values will be assigned the nearest key color.
Colormaps
A visual list of the colormaps available from the choices made previously. These are presented in a descrete form so the key colors can be clearly seen.
CB_Datamap
Standard Datamap object which contain the colormap create from the Color Brewer database. This object should be used as the Datamap input for the desired DataObject.
CB_ColorMapEg
xp_comm_proj/cb_map/cbcmmacs.v contains the User Macro, the UI Macro and the Example Application.
The ColorBrewer database, ColorBrewer_all_schemes_RGBonly3.csv, is provided under the Apache license agreement. See the file ColorBrewer_all_schemes_RGBonly3.license.txt.
Tino Ernst & Tobias Shriebeck International AVS Centre Research Computing Services Devonshire House, Precinct Centre, University of Manchester Oxford Road Manchester UK M13 9PL
CB_ColorMapCore


Fake News or Real News?
insert_chart
Analyze News
center_focus_weak
Analyze Image
Navbar Link
menu
Link Analyzer
speaker_notes
www.fakenews??????.com
Analyze Link


Jdon Framework Architecture
Jdon Framework is a light-weight framework for developing DDD applications.
Jdon Framework = Domain Model + In-memory + Domain Events.
Events implementation of Jdon Framework 6.4 is the Disruptor that it is a concurrent framework can handle 6 million orders per second on a single thread in LMAX recommended by Martin Fowler.
DDD CQRS EventSourcing example source: football Match
Before Domain-Driven Design(DDD) appears , business logic was implemented by the technical component directly, such as service,action and so on, and the model objects were all anaemia model , they are just a data collections, on this way, technical components drive the anaemia models to complete the business logics. this way called "Transaction script".
In DDD there is a big different from the traditional script. Domain models drive the technical components to finish the business logics, domain model is like DNA.
So our architecture can focus on business domain model that is easy to understand ,extend and maintain, in the mean time, domain model also makes our software systems more scalable,and be better performance.
DDD-Oriented Architecture
for easy focus on the business domain,Jdon Framework make domain model easy to living in a software system.
In Memory Domain model
domain model mainly includes the Entity,Value Object and Service that all focus on the business domain,it is nothing to do with the concrete technical implementation. but we need let them living in the technical system.
In Jdon Framework, these domain models are marked with the @Model annotation, so they are in memory and send asynchronous events or message to the consumers .
domain model is the core of our software systems,their lifecycles management is very important, Jdon Framework makes the management of domain model's lifecycles more easily, domain model lives in the in-memory cache ,such as ehcache,oscache,terracotta ....,so the software system will be more scalable with the distributed cache system ,such as terracotta ,memcached.
However,cache is a very low-level technical layer,if we allow the developers to manually interact with cache,then it will easily lead to errors and inconsistecies,so Jdon Framework integrates two interceptors ,one is "CacheInterceptor" ,the other is "DomainCacheInterceptor",they both are configured in the "aspect.xml" file which is a config file of Jdon Framework.
First let's see "CacheInterceptor":
"CacheIntercep" is between the presentation layer and business layer,when the presentation action invoke the "get*()" method of business service,the CacheInterceptor will intercept the invocation,it first checks that whether the domain model object already is the cache,if the model object is not in cache,CacheInterceptor will invoke the next interceptor which is in the interceptor chain,and finally the model object will be fetched from persistence datasource,the CacheInterceptor will gain the fetched model object and put it into the cache.
I guess you have understood how the CacheInterceptor works,now i will introduce you how the DomainCacheInteceptor works?
DomainCacheInterceptor is between business layer(domain model live in this layer) and the persistence layer,before the business layer invoking the persistence layer component to fetch the model, the DomainCacheInterceptor will intercept the invocation,it will also check that whether the model has already in the cache,if in,DomainCacheInterceptor just return the cached Model,or else it will put the model which is retrieved from persistence datasource into the cache.
Last let me see the followed diagram,the diagram describes the relation of the two interceptors.
The architecture components
There are five components model in Jdon Framework, they are:
1. Entity Model with @Model;
2. Service with @Service;
technical component
3. Component with @Component ;
technical component
4. Prodcuer-Consumer mode with @send @Consumer;
5. Interceptor with @ Interceptor, need with @Introduce;
All in com.jdon.annotation.*
As mentioned above,Jdon Framework seperates the application architecture into two parts:Domain models and technical components .
domain models lives in the cache ,and the technical components lives in the IOC container.
The technical component's lifecycles management is also important,Jdon Framework use the IOC container to manage the lifecycles of technical components,at the same time,the IOC container is also holded in the context container such as the ServeltContext.
Jdon Framework uses the interceptors to inject the technical components into the domain models.
By the Jdon Framework,it will drive you to develop your application with the OO style,what's more,in this style,The domain models drive the components to finish the business operations,so do you smell the flavor of DDD ?
Domain Events and CQRS or EDA
As the DDD framework,it is essential to solve the interaction between the domain model and the technical component,Jdon Framework apply the domain event pattern to make the domain models less coupling with technical components.the core architecture diagram as the followed here:
As the above diagram description,when domain models trigger some domain events,the domain event will generate proper domain message,at last the messageListener will treat with the event,and assist with the business logic.
Domain Event is a Producer-Consumer or Publisher-Subscriber patterns; Asynchronous; topic or queue (1:N or 1:1) ; Domain Model is a producer; it send events or message to the consumers:
@Send(topicName) => @Consumer(topicName);
the Topic mode is powered by disruptor. that is fast concurrent programming framework that introduced by Martin fowler :LMAX Architecture.
if there are many consumers, their started order is by its class name's alphabetical . such AEventHandler is first be reaction; and then BEventHandler and CEve.......
If you want to use Domain event ,you just need to use three Annotations,@Introduce,@Inject and @Send.for example,we have a model class named MyModel,and a domain event named MyDomainEvent ,the code is as here:
@Model
public class MyModel {
private Long id;
private String name;
@Inject
private MyModelDomainEvent myModelDomainEvent;
@Inject
private MyModelService myModelServiceCommand;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
if (this.name == null) {
//this is async method, can be splite twice times calling.
EventMessage message = myModelDomainEvent.asyncFindName(this);
this.name = (String) message.getEventResult();
}
return name;
}
……
}
@Introduce("message")
public class MyModelDomainEvent {
@Send(value="MyModel.findName",asyn=true)
public DomainMessage asyncFindName(MyModel myModel) {
return new DomainMessage(myModel);
}
} |
When you retrieve MyModel from service or repository,the CacheInterceptor and the DomainCacheInterceptor will inject the MyModelDomainEvent and MyModelService into MyModel,when injecting the MyModelDomainEvent,@Introduce("message") will lead MyModelDomainEvent to be enhanced with MessageInterceptor,when myModel.getName() is invoked, the MessageListenner will intercept the invocation,it will choose proper means to drive the MessageListner to response this event request.
domain event programming steps:
1. keep domain model in-memory cache:
@Model
public class User {
private String userId;
private String name;
....
}
A class with @Model will live in memory, default is Cache (Ehcache). Or Key-value store others.
When a domain model object with @Model is fetch from repository, we need use @Introduce(“modelCache”) to mak the object live in memory.
@Introduce(“modelCache”) must be annotated in
the interfaces that @Model objects are created or reconstructed
, the interfaces is such as repository class.
This step is very important for domain events working,
2.annotate producer class with @Model and @Introduce("message")
annotate the method with @Send("mytopic") of the producer class
@Introduce(“message”)："message" is the om.jdon.domain.message.MessageInterceptor configured in aspect.xml
It means introducing a MessageInterceptor for this class.
@ Send("mytopic"): "mytopic" is your topic name that equals to the "mytopic" in @Consumer("mytopic");
In this method, you must marshal your data into a DomainMessag that can be unmarshal in consumers.
3.(1) . annotate consumer class with@Consumer("mytopic");
(2). the consumer class need implement
com.jdon.domain.message.DomainEventHandler
another domain events sample :
@Send(topic) ==> @Component(topic);
the consumer is a class with @Component(topic) that need implement com.jdon.domain.message.MessageListener,
Consumer is a future or weight or cron task.
DCI
DCI: Data, Context, Interactions is a programming paradigm invented by Trygve Reenskaug. the domain model is a Data, the domain events producer is a Role of DCI, it includes the interactions of DCI.
Jdon Framework's domain model injection function can inject the role into the domain model, such as above the class UserDomainEvents is a Role, it can be injected into the model UserModel.so it help UserModel implements business function ComputeCount. In runtime, The Role UserDomainEvents will be injected into the Data UserModel.
DDD DCI and Domain Events example
DCI Example:SimpleJdonFrameworkTest.rar
AOP
Using the DDD,It is the domain models drive the technical components to finish the business logics,and in this design style,the components are just the assistants,which assist the domain models to complete the business operations.So how the domain models gain the needed components,Jdon framework use the @Inject and @Component to inject components and the domain events into models.
As the followed diagram illustrates ,when client invoke the getA("a"),if Model A with a Introduce,the A will be enhanced,and the technical component C will also be injected into the A ,at the same time,when inject the B,the B will also be enhanced for the @Introduce.
Other Details
Jdon is a RAD tool for writing a
small/medium stand-alone JavaEE application. it is a IOC/AOP
framework too, and includes a lightweight Ioc container
based on Picocontainer.the feature of Jdon is that all components
are replaceable, even includes the framework itself. you
can plug in any java objects, Jdon is a embeddable framework.
Jdon provides Domain Driven Development for data CRUD
and batch inquiry (master-details)
Jdon is similar with Rubby + lightweight container,
and really simplifies JavaEE development! It can produce
high quality
applications, faster and at lower cost.
By using cache Jdon optimizes the components running performance,
such as the dynamic proxy components. Because of the cache optimization, Jdon potentially improves
the application system performance, such as batch inquiry
operations. The performance of the JPetstore with Jdon is best among several JPetstores (including iBATIS JPetstore/Spring JPetstore)
Jdon seamlessly supports two services: POJO/EJB , it helps
you to build a scalable and extendable small/medium
JavaEE system .
Jdon give your JavaEE application a complete quality solution:
Ioc microkernel:
The great thing about objects is they can be replaced.
----Object-
Oriented Analysis and Design with Applications, Grady Booch,
one of the
founding fathers of object-oriented programming
The great thing about Jdon is it helps you replace them((even
you can replace jdon itself!).
All framework components
include framework infrastructure objects are be managed
by a micocontainer made by Picocontainer,
you can insert or change any components by change the
xml configuration files(such as container.xml/aspect.xml/jdonframework.xml),
you can also replace Jdon framework's infrastructure components(this
is a strongpoint).
Jdon framework will make your components. the infrastructure
components or POJO services collaborate with each other
via dependency
injection.
When you have hundreds of components/POJO services, Jdon's
autowiring function will take care of their invocation
relation.
Interceptor :
You can insert a Interceptor by XML files aspect.xml, Jdon
has some default interceptos, they are pool interceptor/cache
interceptor/stateful interceptor.this interceptos will
active before target services are invoked.if you appont
a interceptor to a service, the service must implements
the interface the interceptor, such as Poolable or Stateful
Service/Componet:
When you want to develop a small system, you
can only use POJO services implement logic function. How to get a service instance? two ways: Annotation or XML
First: Annotation:
Second: XML
in jdonframework.xml (container.xml)
there is such service configuration:
<pojoService name="userDao" class="news.container.UserJdbcDao">
<constructor value="java:/NewsDS"/>
</pojoService> |
in code, we can get the service instance by below mode:
| UserDao ud = (UserDao)WebAppUtil.getService(“userDao”,
request); |
Jdon defines four service models: component instance that
is singleton, service instance that can be pooled
about Choice with Annotaion and XML in Ioc container:XML in IoC containers: A Hell or A Realm?
More Annotation
@Poolable: get a instance from the class's object pooing, Object Pooling - Determinism vs. Throughput
@Stateful:its instance lifecycle is user session scope
@Singleton: get a singleton instance form the class
RAD Tool
Keep deliberately simple, yet still very powerful, so
that your code is kept simple.
Jdon provides a fast development
way for model's CRUD(create/read/update/delete) , in presentation
layer, in general, you don't need any code, only configure MVC Process in
the jdonframework.xml:
<model key="userId" class ="com.jdon.framework.test.model.UserTest"> <actionForm name="userActionForm"/> <handler> <service ref="testService"> <getMethod name="getUser" /> <createMethod name="createUser" /> <updateMethod name="updateUser" /> <deleteMethod name="deleteUser" /> </service> </handler> </model> |
Jdon's presentation layer is based Struts 1.2, so Jdon
will generate Action instance at running time.
Multi page query function can be accomplished quickly
by Jdon, Jdon provide the multi-page taglib, JDBC template,
and Model's cache optimization.
Use Jdon, you can develop a small system in several minutes,
here is the system demo:http://www.jdon.com:8080/testWeb/
More details in Architecture Document Step by Step develop a Jdon application
Comparison with Ruby on Rails
Domain Driven Development
When we develop a J2EE application with Jdon Framework,at first we must finish domain object 's design, and then copy the domain object(Model) to presentation layer's ModelForm, and persistence Model in Hibernate/iBatis. Boundary Object = Domain Object = Entity Object(BO).
Less and simple confuration:
The configuration of jdon Framework is simple, this is the XML DTD, you will find the schemal is very simple, the amount of the schemal is less.
There are two parts in XML jdonframework.xml: models and services, services part is basic configure, it looks like: <pojoService name="XXX" class="xx.xxx.xx" />, models part is for CRUD as below.
CRUD(Create/Read/Update/Delete)
In Jdon Framework, Business logic can be done in service layer, by below configure xml(such as jdonframework.xml), we can kick off controller layer, the C of MVC is done by configures:
<app>
<models>
<model key="username" class="com.jdon.framework.samples.jpetstore.domain.Account">
<actionForm name="accountForm"/> //Boundary Object
<handler>
<service ref="accountService"> /Business Logic Service Component
<getMethod name="getAccount"/> //read Method of the Service
<createMethod name="insertAccount"/> //Create Method of the Service
<updateMethod name="updateAccount"/> /Update Method of the Service
<deleteMethod name="deleteAccount"/>//delete Method of the Service
</service>
</handler>
</model>
</models>
<services>
.......
</services>
</app>
Command patern for calling services
Like the ActionController of Ruby on Rails, t he function/pattern handles incoming requests from the user's browser and routes them to the correct method of a service class , not a controller class such as Struts's DispatchAction. click here for details.
POJO Services and IOC
consider below code:
§package test;
§ public class BServiceImp implements BService{
§ AService a;
§§ public B(AService a){
§§ § this.a = a
§§ }
§ public void invoke(){
§ a.myMethod();
§ }
§ }
There are two way for invoking B:
Ordinarily way without ioc container:
BService b = new BServiceImp(new AServiceImp());
b. invoke();
Revolution way with jdon ioc container：
BService b = (BService) WebAppUtil.getService(“bservice”);
b. invoke();
Now There is only one A class in B class code, if there are more other classes such as C/D/E... , when we create B instance, we must spend more energy in creating those instances of A/C/D or E ..
but, with jdon ioc container, we don't need do these
stupid works any more. when we need use any class, we
can only fetch it and use it.
certainly, at first we must configure all these class in jdonframework.xml:
<app>
<models>
.....
</models>
<services>
<pojoService name="bservice" class="test.BServiceImp"/>
<pojoService name="aservice" class="test.AServiceImp"/>
<pojoService name="cservice" class="test.CServiceImp"/>
</services>
</app>
in configure xml, we don't need take care of the relations
B with A/C/D, this is important difference from Spring,
in Spring configure file, we need add "ref local=a" ,
at this point, Jdon is like HiveMind.
Filter and AOP Interceptor
Permission and cache can be the Interceptors for the application , here is a sample, in myaspect.xml:
<aspect>
<interceptor name="jivejdon_permissionInterceptor" class="com.jdon.jivejdon.service.interceptor.PermissionInterceptor"
pointcut="pojoServices" />
</aspect>
in web.xml we need tell jdon framework the interceptors configuration:
<web-app>
<context-param>
<param-name>aspectConfigure</param-name>
<param-value>WEB-INF/myaspect.xml</param-value>
</context-param>
</web-app>
all configurations can be found in jdon framework's examples.
Jdon Framework architecture
Jdon Framework in J2EE Application Architecture:
welcome you join our english document team.
DDD CQRS EventSourcing example source: football Match
CES:Context Event and State
old version :
Step By Step
How to develop Struts-Jdon-JDBC Application
Command patern for calling services
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