Petar Tahchiev wrote:
Hi guys,
my name is Petar Tahchiev and I am one of the developers of Jakarta Cactus.
I have a really strange problem, when using Ant > 1.6.5.
Hi peter, glad to get some of the cactus folk involved.
When trying to execute my cactus tasks, I invoke actually the JunitTask, I
get the
following exception:
-----------------------------------------------------------------------------
/home/peter/bin/workspace/TestCactus/build.xml:93:
java.lang.NullPointerException
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.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(
DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:758)
at org.apache.tools.ant.Main.startAnt(Main.java:217)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(
JUnitTask.java:1272)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:823)
at org.apache.cactus.integration.ant.CactusTask.executeInContainer(
CactusTask.java:453)
at org.apache.cactus.integration.ant.CactusTask.execute(
CactusTask.java:204)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java
:288)
at sun.reflect.GeneratedMethodAccessor2.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.dispatch.DispatchUtils.execute(
DispatchUtils.java:105)
... 11 more
--- Nested Exception ---
java.lang.NullPointerException
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(
JUnitTask.java:1272)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:823)
at org.apache.cactus.integration.ant.CactusTask.executeInContainer(
CactusTask.java:453)
at org.apache.cactus.integration.ant.CactusTask.execute(
CactusTask.java:204)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java
:288)
at sun.reflect.GeneratedMethodAccessor2.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.dispatch.DispatchUtils.execute(
DispatchUtils.java:105)
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.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(
DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:758)
at org.apache.tools.ant.Main.startAnt(Main.java:217)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Total time: 8 seconds
------------------------------------------------------------------------------------------------
However, if I downgrade to Ant 1.6.5 I don't get this exception and
everything passes
smoothly. Looking at the source code of the task, on line 1272 here is what
we see:
runner = delegate.newJUnitTestRunner(test, test.getHaltonerror(),
test.getFiltertrace(),
test.getHaltonfailure(), false,
true, classLoader);
so it turns out that delegate is null !!!
or test is null.
> In Ant 1.6.5. there seems that this "delegate" object is missing.
Its an addition that lets Ant load junit if it is on the classpath of
the tests; there's no longer any need to have it on ant's own classpath.
We don't plan to roll back to the old design, so the problem with Cactus
becomes one of determining hw
> Also when
> we look on line 799
> we see that delegate is explicitly nullified:
> ------------------------------------------------
>
> delegate = null;
>
> ------------------------------------------------
>
but if you look at execute(), you see
delegate = createMirror(this, mirrorLoader);
How does cactus override execute()? Does it call super.execute(), or
does it do something else? If you point us at the SVN copy of the task,
we can look for ourselves and see. It may be that you are calling some
internal execution stuff before a delegate is set up
--
Steve Loughran http://www.1060.org/blogxter/publish/5
Author: Ant in Action http://antbook.org/
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