Hi,
I have been playing with the beanshelldef class defined by Peter in thread:
http://marc.theaimsgroup.com/?l=ant-dev
<http://marc.theaimsgroup.com/?l=ant-dev&m=106577547220771&w=2>
&m=106577547220771&w=2
Occasionally, I get a duplicate class definition error when using a task
defined by beanshelldef. I can reproduce the problem by using antcall. The
attached build file works fine if I call the 'test' target but fails when the
'call' target is invoked. Is there a new version of BeanShellDef with this
problem fixed? It seems like beanshelldef is executed twice.
Since we know the name of the task that is being created, is it possible to
delay the compilation of the beanshelldef code until it is used, to improve
startup performance?
Ant version: 1.6
BeanShell: 2.0beta1
This task has turned out to be extremely useful. I hope it makes it into the
next version of ant.
Thanks,
Michael
build.xml
=============================
<project name="echo" basedir=".">
<typedef name="beanshelldef" classname="BeanShellDef"/>
<beanshelldef name="test1" classname="AList">
import org.apache.tools.ant.Task;
public class AList extends Task {
String message = null;
public void setMessage(String message) {
this.message = message;
}
public void execute() {
System.out.println("message is " + message);
}
}
</beanshelldef>
<test1 message="hello world"/>
<macrodef name="testMacro">
<attribute name="message"/>
<sequential>
<test1 message="@{message}"/>
</sequential>
</macrodef>
<testMacro message="Hello from Macro"/>
<target name="test">
<test1 message="hello from target test"/>
<testMacro message="hello from target test in macro"/>
</target>
<target name="call">
<antcall target="test"/>
</target>
</project>
Error
=============================
E:\builds\sst2>ant call
Buildfile: build.xml
[test1] message is hello world
[test1] message is Hello from Macro
call:
[beanshelldef] java.lang.reflect.InvocationTargetException
[beanshelldef] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[beanshelldef] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[beanshelldef] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[beanshelldef] at java.lang.reflect.Method.invoke(Method.java:324)
[beanshelldef] at bsh.Reflect.invokeOnMethod(Unknown Source)
[beanshelldef] at bsh.Reflect.invokeObjectMethod(Unknown Source)
[beanshelldef] at bsh.BshClassManager.defineClass(Unknown Source)
[beanshelldef] at bsh.ClassGeneratorImpl.generateClassImpl(Unknown Source)
[beanshelldef] at bsh.ClassGeneratorImpl.generateClass(Unknown Source)
[beanshelldef] at bsh.BSHClassDeclaration.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at BeanShellDef.execute(BeanShellDef.java:95)
[beanshelldef] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
[beanshelldef] at org.apache.tools.ant.Task.perform(Task.java:401)
[beanshelldef] at org.apache.tools.ant.Target.execute(Target.java:338)
[beanshelldef] at
org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:172)
[beanshelldef] at
org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:126)
[beanshelldef] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
[beanshelldef] at
org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:144)
[beanshelldef] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
[beanshelldef] at org.apache.tools.ant.Task.perform(Task.java:401)
[beanshelldef] at org.apache.tools.ant.Target.execute(Target.java:338)
[beanshelldef] at org.apache.tools.ant.Target.performTasks(Target.java:365)
[beanshelldef] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)
[beanshelldef] at
org.apache.tools.ant.Project.executeTargets(Project.java:1094)
[beanshelldef] at org.apache.tools.ant.Main.runBuild(Main.java:669)
[beanshelldef] at org.apache.tools.ant.Main.startAnt(Main.java:220)
[beanshelldef] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:215)
[beanshelldef] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:90)
[beanshelldef] Caused by: java.lang.LinkageError: duplicate class definition:
AList
[beanshelldef] at java.lang.ClassLoader.defineClass0(Native Method)
[beanshelldef] at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
[beanshelldef] at java.lang.ClassLoader.defineClass(ClassLoader.java:431)
[beanshelldef] ... 31 more
[beanshelldef] bsh.InterpreterError: Unable to define class:
java.lang.reflect.InvocationTargetException
[beanshelldef] at bsh.BshClassManager.defineClass(Unknown Source)
[beanshelldef] at bsh.ClassGeneratorImpl.generateClassImpl(Unknown Source)
[beanshelldef] at bsh.ClassGeneratorImpl.generateClass(Unknown Source)
[beanshelldef] at bsh.BSHClassDeclaration.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at bsh.Interpreter.eval(Unknown Source)
[beanshelldef] at BeanShellDef.execute(BeanShellDef.java:95)
[beanshelldef] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
[beanshelldef] at org.apache.tools.ant.Task.perform(Task.java:401)
[beanshelldef] at org.apache.tools.ant.Target.execute(Target.java:338)
[beanshelldef] at
org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:172)
[beanshelldef] at
org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:126)
[beanshelldef] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
[beanshelldef] at
org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:144)
[beanshelldef] at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)
[beanshelldef] at org.apache.tools.ant.Task.perform(Task.java:401)
[beanshelldef] at org.apache.tools.ant.Target.execute(Target.java:338)
[beanshelldef] at org.apache.tools.ant.Target.performTasks(Target.java:365)
[beanshelldef] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)
[beanshelldef] at
org.apache.tools.ant.Project.executeTargets(Project.java:1094)
[beanshelldef] at org.apache.tools.ant.Main.runBuild(Main.java:669)
[beanshelldef] at org.apache.tools.ant.Main.startAnt(Main.java:220)
[beanshelldef] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:215)
[beanshelldef] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:90)
BUILD FAILED
E:\builds\sst2\build.xml:33: Following error occured while executing this line
E:\builds\sst2\build.xml:5: Sourced file: inline evaluation of: `` import
org.apache.tools.ant.Task; public class AList extends Task { . . . ''
internal Error: Unable to define class: java.
lang.reflect.InvocationTargetException : at Line: 3 : in file: inline
evaluation of: `` import org.apache.tools.ant.Task; public class
AList extends Task { . . . '' : public class AList ex
tends Task {
Total time: 6 seconds
