Getting Started of GWT

Simple Note

Just follow the official Getting Started document: http://www.gwtproject.org/gettingstarted.html
(MyWebApp can be an absolute path when creating webapp)

Really excellent document, I cannot say anything else further to make it better.

ZK JMeter: Loop Controller with AURequest

Simple Note

This script is modified from TestSimpleRecord.jmx at https://github.com/benbai123/ZK_Practice/tree/master/General/JMeter/jmeterTestingScript

* Counter Increment: 2, since there are 2 au requests under loop controller
 (i.e., Increment should match the amount of au requests under loop controller)

* Use ${ZSID_C} for ZK-SID of the 1st au request under loop controller,

* Use ${__intSum(${ZSID_C},1,ZSID_C)} for ZK-SID of the 2nd (and after if any) au requests under loop controller.

Pre-Request

Record JMeter Testing Script for ZK
http://ben-bai.blogspot.tw/2013/12/record-jmeter-testing-script-for-zk.html

Modify Demo

http://screencast.com/t/Uut8mUa3b0G

Download

Testing Project
https://github.com/benbai123/ZK_Practice/tree/master/General/JMeter/TestProjForJMeter

Demo Flash
https://github.com/benbai123/ZK_Practice/blob/master/General/JMeter/demo/AURequestLoop.swf

Jmeter Script
TestLoopAURequest.jmx at https://github.com/benbai123/ZK_Practice/tree/master/General/JMeter/jmeterTestingScript

Record JMeter Testing Script for ZK

Simple Note

Tested with JMeter 2.9 and ZK 6.5.2

* Input address and port in HTTP Request Default so they will not be recorded in request and can be changed easily if address/port are changed.

* Need to remove UserDefinedVariable (dtid: 0) before each record then add it back.

* Add parameter tdtid: ${__intSum(${dtid},1,dtid)} to the request for loading page

* Change parameter dtid to ${dtid} for each au request.

* Included pattern:
    .*/zkau.*
    .*\.zul
    .*/TestProjForJMeter.* (for welcome page or any other url matched by servlet, index.zul here)

* Excluded pattern:
    .*/zkau/web/.* (ignore the requests for load resources)

Record Demo

http://screencast.com/t/4rUMLerhQg


Recorded requests:

1. Page load

2. Click "click to start tast"

3. Click "increase first intbox"

4. Click "increase second intbox" (it is wrong in the demo, fixed in latest project)

5. Click "increase first intbox" again

6. Click "increase second intbox" again

7. Remove desktop

Reference

ZK Document
http://books.zkoss.org/wiki/Small_Talks/2012/January/Execute_a_Loading_or_Performance_Test_on_ZK_using_JMeter

JMeter User Manual
http://jmeter.apache.org/usermanual/functions.html#__intSum

Download

Testing Project
https://github.com/benbai123/ZK_Practice/tree/master/General/JMeter/TestProjForJMeter

Demo Flash
https://github.com/benbai123/ZK_Practice/blob/master/General/JMeter/demo/SimpleRecord.swf

Jmeter Script
TestSimpleRecord.jmx at https://github.com/benbai123/ZK_Practice/tree/master/General/JMeter/jmeterTestingScript

JAVA: ZIp or Unzip Files/Folders with zip4j

Simple Note

Testing Project extract resource/test.xlsx to tmp folder then compress files/folders under tmp folder to dist/test.xlsx with zip4j.

dist/test.xlsx is readable by MS Excel.

Testing Project

https://github.com/benbai123/JSP_Servlet_Practice/tree/master/Practice/JAVA/IO/FileProcessing/ZIPorUNZIP

References

examples downloaded from http://www.lingala.net/zip4j/download.php

Write ByteArrayOutputStream to File

Simple Note

test/Test.java shows how to write a ByteArrayOutputStream to a File (dist/test.txt)

https://github.com/benbai123/JSP_Servlet_Practice/tree/master/Practice/JAVA/IO/WriteByteAarrayOutputStreamToFile

Polymorphism in C++

Simple Note

From reference:

One of the key features of derived classes is that a pointer to a derived class is type-compatible with a pointer to its base class. Polymorphism is the art of taking advantage of this simple but powerful and versatile feature, that brings Object Oriented Methodologies to its full potential.

Also refer to http://ben-bai.blogspot.tw/2013/11/virtual-keyword-in-c.html

Tested with Dev-C++ 4.9.9.2

Code

https://github.com/benbai123/C_Cplusplus_Practice/blob/master/CPP/CPP_Basic/CPP_Extend_and_scope/polymorphism/basic/polymorphism_basic.cpp

Result

Refer to http://ben-bai.blogspot.tw/2013/11/virtual-keyword-in-c.html

Reference

http://www.cplusplus.com/doc/tutorial/polymorphism/

Virtual Keyword in C++

Simple Note

Use virtual keyword to define a function in a class that can be redefined in its derived class.

The only valid declaration (virtual or non-virtual) is the declaration within first level Class (first level here means the base class), redefine it in derived class will be ignored.

Also refer to http://ben-bai.blogspot.tw/2013/11/polymorphism-in-c.html

Tested with Dev-C++ 4.9.9.2

Program

https://github.com/benbai123/C_Cplusplus_Practice/blob/master/CPP/CPP_Basic/CPP_Extend_and_scope/virtual/virtual.cpp

Result

Reference

http://www.cplusplus.com/doc/tutorial/polymorphism/