Reverse*a*Sentence*With*Ruby code

For example , if you want "One, Two, Three, Four." to be converted into “.Four ,Three ,Two ,One”, take a look at my ruby version for your reference, hope it helps in some degree :) I know you may never need this function, but some people may let you write such kind of things...

 # Ruby Version 1.9.2-p180  
 def reverseTest(inputtext)  
  @a=""  
  regextext = /[!,.;"()<>\[\]{}]/  
  arr = inputtext.split(/\s/)  
  arr.reverse_each { |item|  
   len = @a.length  
   # Dealing with a word surrounding by one or multiple punctuation  
   if item.partition(regextext).at(1)!=''  
    # Partition the word by particular punctuation, until partition by the last punctuation  
    begin  
     @a .insert(len,item.partition(regextext).at(0))  
     @a .insert(len,item.partition(regextext).at(1))  
     item = item.partition(regextext).at(2)  
    end while item.partition(regextext).at(1)!='' && item.partition(regextext).at(2)!=''  
    # When punctuation is at the end coming after a word  
    @a .insert(len,item.partition(regextext).at(0))  
    @a .insert(len,item.partition(regextext).at(1))  
    @a << ' '  
   # Dealing with a word without surrounding any punctuation  
   else  
    @a << item  
    @a << ' '  
   end  
  }  
  #Remove space at the end of the string and swap symmetry punctuation  
  @a.strip!  
  @a.gsub!(/[()<>\[\]{}]/, '('=>')', ')'=>'(', '<'=>'>', '>'=>'<', '['=>']',']'=>'[', '{'=>'}', '}'=>'{')  
  print @a  
 end  

Using JNative to load AutoITX.dll

I am working on JNative to load AutoITX.dll, and get my complex UI methods work for WebDriver.

First download JNative.jar from website then add JNative.jar to your build path.

Download your AutoITX from http://www.autoitscript.com/site/autoit/downloads/
2 useful docs which you can refer to:
Function reference
http://www.autoitscript.com/autoit3/docs/functions.htm
and AutoITX Help doc -> DLL interface introduction(Find it after installing AutoITV3)

Then start to create your own method based on AutoITX great Functions which in AutoITX.dll

Here is a sample code to create mouse move methods in Java

 package org;  
 import org.xvolks.jnative.JNative;  
 import org.xvolks.jnative.exceptions.NativeException;  
 public class LoadDllSample {  
      public static void main(String[] args) throws IllegalAccessException {  
           // TODO Auto-generated method stub            
           try {  
                GetMyMouseMove(100, 100 ,40);  
           } catch (NativeException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
           }  
      }  
      /*  
       *      AutoItX Interface For AU3_MouseMove() Function  
            AU3_API long WINAPI AU3_MouseMove(long nX, long nY, long nSpeed);  
       */  
      public static void GetMyMouseMove(int x, int y, int s) throws NativeException, IllegalAccessException{  
           JNative nGetMyMouseMove = new JNative("C:\\Program Files\\AutoIt3\\AutoItX\\AutoItX3.dll", "AU3_MouseMove");  //load .dll file and specific func
           nGetMyMouseMove.setParameter(0,x);//The screen x coordinate to move the mouse to.  
           nGetMyMouseMove.setParameter(1,y);//The screen y coordinate to move the mouse to.  
           nGetMyMouseMove.setParameter(2,s);//The speed s to move the mouse (optional)  
           nGetMyMouseMove.invoke();  
           return;  
      }  
 }  

I will work on more functions and hope they may help my WebDriver automation tests soon :) Enjoy!

Update: The source code has been uploaded to my github, check it out if you like : https://github.com/joychester/AutoIT-in-Java

Profiling OSGi project with Btrace

I met "java.lang.NoClassDefFoundError" when i did profiling with my OSGi project:

Error com.myapp.template.TemplateServlet - TemplateServlet.doGet() exception
java.lang.NoClassDefFoundError: CodeLineTiming at com.myapp.service.proxy.abc.impl.ServiceProxyImpl.$btrace$CodeLineTiming$onCall(ServiceProxyImpl.java) at com.myapp.service.proxy.abc.impl.ServiceProxyImpl.getRfpWithChangeLog(ServiceProxyImpl.java:467) at
...

So two things need to be modified from my side:
1. add package to btrace code , for example "package com.sun.btrace.samples;"

 
 package com.sun.btrace.samples; 

 import com.sun.btrace.annotations.*;  
 import static com.sun.btrace.BTraceUtils.*;  
 import com.sun.btrace.aggregation.*;  
 @BTrace  
 public class MethodResponseTime {  
...
}

2. add OSGI config.properties in felix/conf/ to include org.osgi.framework.bootdelegation=com.sun.btrace,com.sun.btrace.*

Then start your application, enjoy profiling with Btrace:)

Thanks for @yardus great help and also good post from this: http://blogs.sun.com/binublog/entry/glassfish_v3_profiling

Making VisualVM as a Windows service on remote server

I am often Adding a remote JMX connection to the VisualVM to do monitoring work to capture JVM performance status. however, some of application are running as a windows service remotely, so i can not use Btrace Workbench then. if you do not want to change the Windows service back to console mode, then here is what I solved mine:

PS:Making sure Latest JDK1.6 installed for getting jVisualVM and Btrace, more info please refer to https://visualvm.dev.java.net/pluginscenters.html, your JAVA_HOME can be a separate one for your java application.

Step1: Remote to the application server using a console mode: mstsc /console /v:(For Winows server 2003 or winXP sp2) or admin mode:mstsc /admin /v:(Windows XP Service Pack 3, Windows Vista Service Pack 1 and Windows Server 2008 or later), why? please see this link

Step2: Use AppToService.exe to create VisualVM as a Windows service
Type such command line in cmd:

AppToService.exe /Install "C:\Program Files\Java\jdk1.6.0_24\bin\jvisualvm.exe" /AbsName:"VisualVM" /Interact:1

Step3: Start the "VisualVM" in Services

So you can see the VisualVM will launch on your remote desktop, then the Java process on that server running as a service can be monitoring as a local process.

Some Useful References:
http://blogs.sun.com/nbprofiler/entry/monitoring_java_processes_running_as
http://vicevoice.blogspot.com/2009/09/vaas-visualvm-as-service.html
http://www.microsoftnow.com/2008/01/no-more-mstscexe-console.html
More update from Sun blog： https://blogs.oracle.com/nbprofiler/entry/monitoring_java_processes_running_as My Friend Roy and Rudy's help as well:)

消失的纯白2011--A flash Game of my good Friend

转载我一个好朋友自创的Flash Game，在新的一年里,祝福他和他的家人--坚强，幸福！

A decade from my High School Graduation

Little's Law on Performance Test

Little's Law, as a part of Queuing theory, which was introduced to me by Wilson Mar about 2 years ago. We can make use of it to help performance test planning and modeling.

I also would like to usually calculate the arrival rate of system :

L = λW
λ = L/W

Where,
W = Average response time + Think time
L = Virtual Users we simulate in load generation tool

After calculating the arrival rate λ , I will compare arrival rate λ with Throughput X to see if the system can catch up the incoming load, if not, then start tuning it!

One example:

W =(0.352 + 0); -- which means no think time for test
L = 8;

then,
λ = L/W = 8/(0.352 + 0) = 22.73

Meanwhile, get Throughput measured by load generation tool
Throughput = 22
Not that bad currently :)

Some Update after several years I met with such an elegant equation, following results are what i have worked with my perf team to prove the Little's law:

Little's Law for Finding Response Time: 

MeanResponseTime(AVG) = MeanNumberInSystem(VUs) / MeanThroughput(TPS)

Assumptions:

• Stable system, in the long terms
• No Obvious System Bottlenecks
• Similar Actions in the system

Test And Measurement -- Get XXX Pages: 

VUs	AVG(ms)	90%(ms)	TPS	Calculated VUs using Little's Law
1	58	72	16.98	0.99
12	74	108	161.63	11.96
25	83	121	297.99	24.73
50	138	209	360.67	49.77
75	197	349	379.59	74.78
100	261	492	381.21	99.50
125	326	636	381.80	124.71

Predicting and Modeling: 

• Find relations between VU and Avg Response Time By Curve fitting:

y = 0.0067x2 + 1.3698x + 53.613

• Response Time Validation: 

Vus	Predict Result	Test Result
35	109.7	101
65	170.9	172
90	231.1	238
110	285.3	290

• Find relations between VU and Throughput By Curve fitting:

y = 82.39ln(x) + 7.8124

• Throughput Validation: 

Vus	Predict Result	Test Result
35	300.7	342.61
65	351.7	376.35
90	378.5	374.49
110	395	377.74

Simulate Moving your mouse by AutoIT and WebDriver

You can use AutoIT within WebDriver to move your mouse freely, Create your own APIs to simulate your mouse move and click very easily, enjoy it! :)

 autoitx ai = autoitx.INSTANCE;  
 WebDriver driver = new FirefoxDriver();  
 driver.get("http://www.autoitscript.com/autoit3/downloads.shtml");  
 FirefoxWebElement downloadpic = (FirefoxWebElement) driver.findElement(By.cssSelector("img[alt=\"Download AutoIt\"]"));  
 int X = (int) downloadpic.getLocationOnScreenOnceScrolledIntoView().getX();  
 int Y = (int) downloadpic.getLocationOnScreenOnceScrolledIntoView().getY();  
 int offsetX = (int) downloadpic.getSize().getWidth();  
 int offsetY = (int) downloadpic.getSize().getHeight();
 int posx = X + offsetX/2;  
 int posy = Y + offsetY/2;  
 ai.AU3_MouseMove(posx, posy, 20);  
 ai.AU3_MouseClick("left", posx, posy, 1, 10);  

Reference for my previous post on WebDriver and AutoIT: http://joychester.blogspot.com/2011/01/deal-with-file-download-in-webdriver-by.html

Set up Browser caching with Caution to speed up your website

"If you use tech improperly , things will be messed up!"

There are good start tips for Browser caching strategy posted by HttpWatch long time ago: http://blog.httpwatch.com/2007/12/10/two-simple-rules-for-http-caching/
It works great in most of situation.

However, if you have your website more complex, such as using ajax, the post above may not be sufficient.

I found interesting post from caching on IE for caching Ajax requests:

This means that any Ajax derived content in IE is never updated before its expiration date – even if you use a forced refresh (Ctrl+F5)—which means even you add “Pragma: no-cache” header with your request.
The only way to ensure you get an update is to manually remove the content from the cache.

Detail info goes to Fact#2 of this post: http://blog.httpwatch.com/2009/08/07/ajax-caching-two-important-facts/

Another conclusion for browser caching:

“In order to ensure consistent caching behaviour with IE and Firefox you should:
Always specify an Expires header. It will normally be set to -1 for immediate expiration of HTML pages or a date well into the future for other resources such as images, CSS and Javascript;
If you want to force a page to be reloaded, even with the Back button, then use Cache-Control: no-cache, no-store”

Detail info goes to this post: http://blog.httpwatch.com/2008/10/15/two-important-differences-between-firefox-and-ie-caching/

How to set up Cache-control and Expire header on Apache web Server based on your derision and deep understanding of your application:
http://www.askapache.com/htaccess/speed-up-your-site-with-caching-and-cache-control.html

Deal with File download in WebDriver by AutoIT

"This is annoying , but you have to face it sometimes"

Solution:
1> Install AutoIT V3.2, not the latest version, like V3.3.6, BTW, you had better install AutoIT to its default folder:"C:\Program Files\AutoIt3"
2> Download jWinAuto
3> Add all .jars to your libs, including jna.jar and jAutoIt.jar within jWinAuto
4> Write your testing code
I put the Watir scripts in comments for each steps, FYI:

 import org.openqa.selenium.By;  
 import org.openqa.selenium.WebDriver;  
 import org.openqa.selenium.firefox.FirefoxDriver;  
 import com.compdev.jautoit.autoitx.autoitx;  
 public class AutoIT {  

      public static void main(String[] args) throws InterruptedException {  

           //ai = WIN32OLE.new("AutoItX3.Control")  
           autoitx ai = autoitx.INSTANCE;  
            //ie=FireWatir::Firefox.new  
           WebDriver driver = new FirefoxDriver();  
            //ie.goto("http://www.autoitscript.com/autoit3/downloads.shtml")  
           driver.get("http://www.autoitscript.com/autoit3/downloads.shtml");  
            //ie.image(:alt,'Download AutoIt').click  
            driver.findElement(By.cssSelector("img[alt=\"Download AutoIt\"]")).click();  
            //res=ai.WinWait("Opening autoit-v3-setup.exe","",10)  
            int res = ai.AU3_WinWait("Opening autoit-v3-setup.exe","",10);  
            // if res = 1, then it shows you find the window with proper title  
            System.out.print("res" + res);  
            Thread.sleep(3000);  
            //res=ai.WinActivate("Opening autoit-v3-setup.exe")  
            ai.AU3_WinActivate("Opening autoit-v3-setup.exe","");  
            ai.AU3_Send("{TAB}",0);  
            Thread.sleep(3000);  
            ai.AU3_Send("{TAB}",0);  
            Thread.sleep(3000);  
            ai.AU3_Send("{ENTER}",0);  
            //Start file downloading...
      }  
 }  

So you can use AutoIT in WebDriver to deal with your Win32(disgusting) pop-ups or other situations, easily! Want to know how powerful the AutoIT is, please refer to its function reference :)

BTW, just realize WebDriver is implementing a batch of GUI event driven APIs, Cool!