Monday 31st Dec 2007 : Hollywood - Wicklow Gap

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Monday 24th December 2007

Naas - carragh - newbridge - naas. 40km

Sunday 23rd Dec 2007

Naas - Blessington - Lacken - Vallymount - Ballymore - Naas

55km

Sunday 14th Dec 2007

Sunday Dec 7th 2007

Naas - Ballymore - Blessinton - Eadestown - Kill - Naas.


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SSH access to Joyent

This hopefully the first of a few posts on the general topic of Facebook application development with Java using the free hosting provided by Joyent.

I've setup cygwin for remote access to my joyent account. I followed this tutorial to configure SSH with no password to ease the hassel of logging into the server.

Installing Java JTP into Maven

First download the Java Transaction API
Classes 1.0.1B zip.

And then run this maven command to add the zip to the local repo.

mvninstall:install-file-DgroupId= javax.transaction
-DartifactId=jta
-Dversion=1.0.1B-Dpackaging=jar-Dfile=jta-1_0_1B-classes.zip 

cygwin & java classpaths

alias xsl='/cygdrive/c/tools/Java/jdk1.5.0_13/bin/java -server -classpath 'cygpath -wp /cygdrive/c/tools/xalan-j_2_7_0/xalan.jar:/cygdrive/c/tools/xalan-j_2_7_0/xml- apis.jar:/cygdrive/c/tools/xalan-j_2_7_0/xercesImpl.jar:/cygdrive/c/tools/xalan-j_2_7_0/serializer.jar ' org.apache.xalan.xslt.Process -v'

http://narencoolgeek.blogspot.com/2005/07/java-classpaths-on-cygwin.html

Maven OutOfMemory

    [javac] The system is out of resources.
    [javac] Consult the following stack trace for details.
    [javac] java.lang.OutOfMemoryError
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------

The solution : MAVEN_OPTS=-Xmx512m

Java Persistence API

Java Persistence API

Trying to get JPA and derby working together with jdk 5 SE.

JPA with a Derby DB

Rehash of the JPA tutorial

Hibernate as JPA provider

java.lang.IllegalAccessError: tried to access method junit.framework.TestCase.()V

Seems this error happens when running ANT 1.7 and JUnit 3.8.1. The quick solution is upgrade junit to 3.8.X.

The cause as i can make out at this time is this. The junit task in the ant script forks a new jvm which creates a new classloader, this correctly picks up the junit 3.7.1 jar. Between 3.7 and 3.8.1 junit changed the default method name for getting the test name, from name() to getName(). ANT 1.7 in this case, first checks the junit version and then attempts to use reflection to call the correct test name method, but since the Task class has a protected constuctor method and there is a new classloader this IllegalAccessError is thrown.

The method name change is correct, the reflection stuff is correct but the classloader stuff is probally smack.

C:\Develop\UIClaims50_PeriodicBuilder\UI\UITools\components\cruisecontrol\projects\build-ant.xml:94: The following error occurred while executing this line:
C:\Develop\UIClaims50_PeriodicBuilder\UI\EJBServer\ant\uiclaims.junit.xml:43: java.lang.IllegalAccessError: tried to access method junit.framework.TestCase.()V from class org.apache.tools.ant.taskdefs.optional.junit.JUnitTaskMirrorImpl$VmExitErrorTest
 at org.apache.tools.ant.ProjectHelper.addLocationToBuildException(ProjectHelper.java:541)
 at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:418)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
 at sun.reflect.GeneratedMethodAccessor170.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
...
 at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: C:\Develop\UIClaims50_PeriodicBuilder\UI\EJBServer\ant\uiclaims.junit.xml:43: java.lang.IllegalAccessError: tried to access method junit.framework.TestCase.()V from class org.apache.tools.ant.taskdefs.optional.junit.JUnitTaskMirrorImpl$VmExitErrorTest
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:115)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.Target.execute(Target.java:357)
 at org.apache.tools.ant.Target.performTasks(Target.java:385)
 at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
 at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
 at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
 at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)
 ... 16 more
Caused by: java.lang.IllegalAccessError: tried to access method junit.framework.TestCase.()V from class org.apache.tools.ant.taskdefs.optional.junit.JUnitTaskMirrorImpl$VmExitErrorTest
 at org.apache.tools.ant.taskdefs.optional.junit.JUnitTaskMirrorImpl$VmExitErrorTest.(JUnitTaskMirrorImpl.java:80)
 at org.apache.tools.ant.taskdefs.optional.junit.JUnitTaskMirrorImpl.addVmExit(JUnitTaskMirrorImpl.java:55)
 at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.logVmExit(JUnitTask.java:1446)

Google Syntax Highlighter

I'm just going to outline the three steps that are needed to enable the google syntax highlighter within blogger.com sites. A patched version of the 'shCore.js' script has been made available by Wctang, which corrects Issue 18 : Syntaxhighlighter doesn't work on blogger.com. In your template file

1 : Reference the wctang 'shCore.js'

2: Reference the 'svn/tags/1.5.0' version of the code scripts.

3 : Don't reference the 'SyntaxHighlighter.css'.

The '.dp-highlighter .tools' section needs to be patched to enable the syntax high lighter in firefox. Copy the content of the 'SyntaxHighlighter.css' to your template file, and make sure to update the correct section.

/* Styles for the tools */
.dp-highlighter .tools 
{
 padding: 3px 8px 3px 10px;
 font: 9px Verdana, Geneva, Arial, Helvetica, sans-serif;
 color: silver;
 background-color: #f8f8f8;
/* text-align: right; */
 padding-bottom: 10px;
 border-left: 3px solid #6CE26C;
}

The final result ....

public class HelloSyntaxHighlighter
{
  public HelloSyntaxHighlighter()
  {
  }

  private void xx()
  {
  }

  protected boolean static getXX()
  {
    return null;
  }
}

Extending ANT JUnitTask

I needed to run the JUnitTask from code (since i needed to create a custom FileSet for the BatchTest). I started out with a plan Task, but while the code below runs the classpath details that the task uses are incorrect.

public class JunitTestExistsTask extends Task {

  private void runAntJUnitTests()
    throws BuildException {
    
    try
    {
      JUnitTask jUnitTask = new JUnitTask();
      jUnitTask.setOutputToFormatters(true);
      jUnitTask.setProject(getProject());
      jUnitTask.setShowOutput(true);
      jUnitTask.setFork(true);

      FormatterElement formatterElement = new FormatterElement();
      TypeAttribute typeAttribute = new TypeAttribute();
      typeAttribute.setValue("xml");
      formatterElement.setType(typeAttribute);
      jUnitTask.addFormatter(formatterElement);

      BatchTest batchtest = super.createBatchTest();
      File results = new File(getProject().getProperty("dir.test.results"));
      batchtest.setTodir(results);
      batchtest.addFileSet(createFileSet());

      log("runAntJUnitTests --> execute()");
      jUnitTask.execute();
    }
    catch(Throwable e)
    {
      e.printStackTrace();
      throw new BuildException(e);
    }
  }
}

I wanted to avoid having to set the classpath in code, so i took another aproach to the issue. I decided my Task would extend from the JUnitTask, this allows me to keep that majority of the task config in xml, and reuse the default handling of classpaths and jvm args.

public class JunitTestExistsTask extends JUnitTask {

  /**
   * Add the test files to a BatchTest and start the JUnit process.
   * @throws BuildException
   */
  private void runAntJUnitTests()
    throws BuildException {    
    try {
      BatchTest batchtest = super.createBatchTest();
      File results = new File(getProject().getProperty("dir.test.results"));

      batchtest.setTodir(results);
      batchtest.addFileSet(createFileSet());
      super.execute();      
    } catch (Exception e) {
      throw new BuildException(e);
    }
  }
}

The xml for this command

        name="junitTestsExist" 
      classname="curam.uic.tools.policing.junit.JunitTestExistsTask" 
      classpathref="junit.target.cp"/>
  
    

    

  

JMockit : Non-public mock class

Running a simple unit test, with the 'new Object()' syntax.


public void test()
{
Mockit.redefineMethods(emeraldjava.impl.ApplicationCase.class, new Object() {
public void method()
{
System.out.println("JMocked");
}
});
}
ApplicationCaseTest appCase = new ApplicationCaseTest(getName());
assert(appCase.method(),..);
}


I got this error.


java.lang.IllegalArgumentException: Non-public mock class
at mockit.Mockit.collectMockMethods(Mockit.java:182)
at mockit.Mockit.redefineMethods(Mockit.java:170)
at mockit.Mockit.redefineMethods(Mockit.java:124)
at emerabldjava.workflow.ClaimIntakeTest.test2(ClaimIntakeTest.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:166)
at junit.framework.TestCase.runBare(TestCase.java:140)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:131)
at junit.framework.TestSuite.runTest(TestSuite.java:173)
at junit.framework.TestSuite.run(TestSuite.java:168)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)


Solution

Use an named class


public Test extends TestCase
{

public class AppMock
{
public void method()
{
System.out.println("JMocked");
}
}

public void test()
throws AppException, InformationalException, ClassNotFoundException
{
Mockit.redefineMethods(emeraldjava.impl.ApplicationCase.class, new AppMock());
UICApplicationCaseTest appCase = new UICApplicationCaseTest(getName());
assert(appCase.method(),..);
}
}


Blogger with Google Analytics & Sitemap

Just a couple of quick links to two tutorials on setting your blog (or any website) up with statistics and indexing.

Blogger And Analytics outlines how you can see the hits your site recieves, using Google Analytics.

To ensure that the context of your site is index for the google search engine you should follow the Blogger and Sitemap tutorial, which uses the Google SiteMap.

Blogger & Google Code Prettify

I wanted to improve the look of my java source code examples that i have in my blog posts. I came across the google-code-prettify project. The main hassel is the java script and css files need to be included in the blog template. A bit of investigation and i noticed i could link the two required files from the project web site. [Granted, if they change the location of the files we're screwed.]

1: Add the java script file to the blog template.

<script src="http://google-code-prettify.googlecode.com/svn/trunk/src/prettify.js" type="text/javascript">

The complete java script src file path : http://google-code-prettify.googlecode.com/svn/trunk/src/prettify.js

2: Link the css file to the blog template.

<link rel="stylesheet" type="text/css" ref="http://google-code-prettify.googlecode.com/svn/trunk/src/prettify.css"/>

The complete css src file path : http://google-code-prettify.googlecode.com/svn/trunk/src/prettify.css

3: Update the blog template to call the prettyPrint() function when loaded.

In the blog template file add the call to the prettyPrint() function to the body onload tag.

<body onload="prettyPrint();">

4: Use the prettyprint command in your blog post.

<pre class="prettyprint" id="xml">
your code
<pre>

Links

Duffblog 2.0: Google Code Prettify

JMockit

The business class we want to test


package emeraldjava.jmockit;

/**
* Service.
*/
public class Service {

public boolean doBusinessWork()
throws Exception
{
Workflow workflow = new Workflow();
if(workflow.startProcess()==1)
return true;
else
return false;
}

}


The object used by the service class


package emeraldjava.jmockit;

public class Workflow {

public long startProcess()
throws Exception
{
return 1;
}

}


The test class


package curam.uic.tools.jmockit;

import junit.framework.TestCase;
import mockit.Mockit;

public class ServiceTest extends TestCase {

public ServiceTest(String name)
{
super(name);

}

public void test()
throws Exception
{
Service service = new Service();
assertEquals("",true,service.doBusinessWork());
}

public void test2()
throws Exception
{
Service service = new Service();

Mockit.redefineMethods(Workflow.class, new Object() {
public long startProcess()
{
return 2;
}
});
assertEquals("",false,service.doBusinessWork());
}

public static class WorkflowMock
{
public long startProcess()
throws Exception
{
throw new Exception();
}
}

public void test3()
{
Service service = new Service();
Mockit.redefineMethods(Workflow.class, WorkflowMock.class);

try
{
service.doBusinessWork();
}
catch(Exception e)
{
assertNotNull("Exception thrown",e);
}
}
}