Hi Larzeni,
The project you provided as download only builds a WAR not EAR. As the
WAR declares all dependencies as "provided" it won't run anyway. Can you
provide the EAR gradle project? I downloaded Wildfly, Graddle but I need
your full "environment" to test it.
Can you update it, please? I have to admit I never used Gradle before,
so maybe it's my fault, but at least my Intellij does not bring up an
EAR artifact either...
Jens
Am 15/12/15 um 11:00 schrieb Luca Arzeni:
After struggling for a couple of week I have to admit my defeat.
I've found no way to make the project to work.
And NO, there is NO WAY to circument this issue using jboss-deployment-structure.xml,
"Dependencies" iin manifest entries, or placing tapestry jars inside the jboss
modules folder and folks like them.
BUT, if some poor soul like me should face this issue, this is the workaround
that I've found:
1) individuate the classes that causes you app to crash
2) leave these classes in war/classes folder (not sure if this is needed, but I
have no time to debunk also this point)
3) generate an additional jar (say "classLoaderFucker.jar") which contains ONLY
the classes that causes you app to crash
4) place this jar in the ear/lib folder.
This way plastic will find the classes that he needs in the ear lib folder (in
it's same classloader), and will no more cause classloader issues.
I fully understand that THIS IS NOT A SOLUTION, but simply a cumbersome
workaround, and the procedure is a trial and error attempt to patch the issue,
but at least my app is (for now...) working.
(sadly) Thanks to all,
larzeni
Sent: Friday, December 11, 2015 at 7:05 PM
From: "Luca Arzeni" <l.arz...@iname.com>
To: "Tapestry Users" <users@tapestry.apache.org>
Subject: Is tapestry plastic incompatible with JEE specs?
Hi there,
my environment is:
JBoss 7.2+ (actually 6.1.1.GA) or Wildfly 8.0 Final
Tapestry5 5.3.7
I'm developing a little ear, which has the following structure
myear.ear
| core-1.1.jar
| webclient-1.1.war
| lib/
| plastic-5.3.7.jar
| tapestry5-annotations-5.3.7.jar
| tapestry-core-5.3.7.jar
| tapestry-func-5.3.7.jar
| tapestry-ioc-5.3.7.jar
| tapestry-json-5.3.7.jar
| tapestry-upload-5.3.7.jar
| ... omissis ...
the core-1.1.jar module contains few EJBs,
the webclient-1.1.war module contains my t5 app (pages, components and so on)
I routinely use and appreciate t5 IOC, so I used it also in the core module; at this
point I need to have the t5 jars available to the core AND to the webclient, so I put
them in the shared "lib" folder of the EAR.
So far, so good: the app worked and I had no problem.
Today I was needing to place an object (a simple bean with 3 strings attributes
and their getters and setters) and serialize/deserialize it into a file.
The bean is needed only in the webclient (I need to place it in session), so I
placed it in the webclient.war.
Now my webapp crashed when I try to instantiate a page that refers to the bean.
Looking at the problem, it seems to be caused by plastic that tries to reach
the class by using the jboss classloader.
This is the relevant part of the stack:
---
org.apache.tapestry5.internal.plastic.asm.ClassWriter.getCommonSuperClass(ClassWriter.java:1588)
org.apache.tapestry5.internal.plastic.asm.ClassWriter.getMergedType(ClassWriter.java:1559)
org.apache.tapestry5.internal.plastic.asm.Frame.merge(Frame.java:1406)
org.apache.tapestry5.internal.plastic.asm.Frame.merge(Frame.java:1308)
org.apache.tapestry5.internal.plastic.asm.MethodWriter.visitMaxs(MethodWriter.java:1353)
org.apache.tapestry5.internal.plastic.asm.tree.MethodNode.accept(MethodNode.java:635)
org.apache.tapestry5.internal.plastic.asm.tree.MethodNode.accept(MethodNode.java:557)
org.apache.tapestry5.internal.plastic.asm.tree.ClassNode.accept(ClassNode.java:361)
org.apache.tapestry5.internal.plastic.PlasticClassPool.toBytecode(PlasticClassPool.java:187)
org.apache.tapestry5.internal.plastic.PlasticClassPool.realize(PlasticClassPool.java:140)
org.apache.tapestry5.internal.plastic.PlasticClassPool.realizeTransformedClass(PlasticClassPool.java:122)
org.apache.tapestry5.internal.plastic.PlasticClassImpl.createInstantiator(PlasticClassImpl.java:358)
org.apache.tapestry5.internal.plastic.PlasticClassPool.loadAndTransformClass(PlasticClassPool.java:350)
org.apache.tapestry5.internal.plastic.PlasticClassLoader.loadClass(PlasticClassLoader.java:38)
java.lang.ClassLoader.loadClass(ClassLoader.java:358)
java.lang.Class.getDeclaredFields0(Native Method)
java.lang.Class.privateGetDeclaredFields(Class.java:2509)
java.lang.Class.getDeclaredField(Class.java:1959)
---
In the JEE spec it is written that the war classloader must be isolated from
the EAR classloader.
In my understanding this means that t5 plastic (which lives in the EAR
classloader) cannot reach the classes that are in the war (separate
classloader).
I could place the jars in the war/lib folder, but at this point the core module
cannot see them.
The only viable solution that I found is to place the bean classes in the
shared lib folder, by extracting them from the war, but this is only a
temporary patch.
In the past I developed another ear and I had a similar issue trying to instantiate a
page from another page. I solved it by avoiding the link between the two pages; but now
I'm starting to think that it was another "face" of the same problem.
Now, since these issues are becoming too frequent to work around them, and I'm
wandering if there is a real solution or there's a real compatibility issue
between T5 and JEE specs.
Is there anyone that can help me?
Thanks,
larzeni
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