Michael Ludwig schrieb am 19.01.2011 um 13:51 (+0100):
> Patrick Martin schrieb am 19.01.2011 um 10:31 (+0100):
> > D:\tmp\build.xml:7: taskdef A class needed by class
> > org.apache.tools.ant.taskdefs.email.MimeMailer cannot be found:
> > javax/mail/MessagingException
> > using the classloader AntClassLoader[D:\tmp\a\activation.jar]
>
> Only activation.jar in this classloader. But even when I put all
> required JARs into that custom classloader, it fails:
>
> <path id="mail.path">
> <pathelement location="${ant.home}/lib/ant-javamail.jar" />
> <pathelement location="${javamail.dir}/mail.jar" />
> <fileset dir="${javamail.dir}/lib">
> <include name="**/*.jar"/>
> </fileset>
> <pathelement location="${jlb.dir}/activation.jar" />
> </path>
>
> <taskdef name="mymail"
> classpathref="mail.path"
> classname="org.apache.tools.ant.taskdefs.email.EmailTask" />
>
> T:\MiLu\mail-jar.xml:25: java.lang.ClassNotFoundException:
> javax.mail.internet.MimeMessage
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:169)
> at
> org.apache.tools.ant.taskdefs.email.EmailTask.execute(EmailTask.java:452)
> at
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
> 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:597)
> at
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
> at org.apache.tools.ant.Task.perform(Task.java:348)
> at org.apache.tools.ant.Target.execute(Target.java:390)
> at
> org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:179)
> at
> org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:82)
> at org.apache.tools.ant.Main.runBuild(Main.java:786)
> at org.apache.tools.ant.Main.startAnt(Main.java:218)
> at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
> at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
>
> It seems you have to use the main classloader, not a self-defined one.
> But I might be wrong. And even if not, I don't know why. For the
> experts to clarify.
Okay, thanks to the <ClassloaderTask>, it now works. (See script.)
But I still haven't understood the underlying issue. What's so special about
mail.jar that it needs special treatment?
I noticed its MANIFEST.MF contains lots of checksums. Do they cause problems
for additional classloaders defined in Ant?
Name: javax/mail/search/SearchTerm.class
SHA1-Digest: JveDH0FF1JcVa7wJL7mLJ48Vwd4=
Here's the working script:
<!-- vim: set filetype=ant: -->
<project>
<property name="jlb.dir" location="G:\JLib"/>
<property name="javamail.dir" location="${jlb.dir}/javamail-1.4.1"/>
<path id="mail.path">
<pathelement location="${javamail.dir}/mail.jar" />
<!-- not needed:
<fileset dir="${javamail.dir}/lib"><include
name="**/*.jar"/></fileset>
<pathelement location="${jlb.dir}/activation.jar" />
-->
</path>
<!-- http://enitsys.sourceforge.net/ant-classloadertask/ -->
<!-- JAR liegt in ~/.ant/lib -->
<taskdef name="classloadertask"
classname="org.apache.tools.ant.taskdefs.ClassloaderTask"/>
<!-- nachrüsten -->
<classloadertask classpathRef="mail.path" loader="thread"/>
<property name="address" value="[email protected]"/>
<property name="password" value="secret"/>
<mail from="${address}"
mailhost="mail.gmx.de" ssl="yes" mailport="465"
user="${address}" password="${password}"
subject="Ant Mail Test">
<to address="[email protected]"/>
</mail>
</project>
--
Michael Ludwig
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