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From Paweł Wielgus <poulw...@gmail.com>
Subject Re: Struts2 configuration (struts.xml) and Convention Plugin not compatible with Java 8?
Date Wed, 18 Jun 2014 08:39:17 GMT
Thank You for clarification,
i will see what i can do with ClassFinder
and if i will be anything good i will get back.



2014-06-18 10:25 GMT+02:00 Lukasz Lenart <lukaszlenart@apache.org>:
> And we do accept Pull Requests :-)
> https://github.com/apache/struts
>
> 2014-06-18 10:25 GMT+02:00 Lukasz Lenart <lukaszlenart@apache.org>:
>> It can be part of 2.3.x as well, the plan is to be compatible with
>> JDK8 but not depend on it. Lambdas are implemented as anonymous
>> classes as far I can recall, so maybe improving ClassFinder in that
>> area would do the trick ;-)
>>
>> 2014-06-18 10:20 GMT+02:00 Paweł Wielgus <poulwiel@gmail.com>:
>>> Hi Łukasz,
>>> can i somehow help with this?
>>>
>>> Is it all about classloader black magic
>>> or a normal programer can make any progress with this subject.
>>>
>>> I understand that JDK8 is much more than just lambdas,
>>> so maybe i would be able to help with this "lambdas only" problem.
>>>
>>> I would be happy if S2.3.x would be abble to load such action classes
>>> but would not be fully compatible with JDK8.
>>> But maybe this is all or nothing case?
>>>
>>> Best greetings,
>>> Paweł Wielgus.
>>>
>>>
>>>
>>>
>>> 2014-06-18 10:08 GMT+02:00 Lukasz Lenart <lukaszlenart@apache.org>:
>>>> S2 isn't JDK8 compatible, it will be case for S2.5
>>>>
>>>>
>>>> 2014-06-18 10:04 GMT+02:00 Paweł Wielgus <poulwiel@gmail.com>:
>>>>> Hi all,
>>>>> does anyone know
>>>>> if this these exceptions [1][2] i see when staring application
>>>>> are the result of using lambda expressions inside actions?
>>>>>
>>>>> If i just move these lambdas out of action body
>>>>> to another class (helper)
>>>>> everything works just fine.
>>>>>
>>>>> How can i help to resolve this?
>>>>> I would love to have lambdas in action methods.
>>>>>
>>>>> Struts version is 2.3.16.3
>>>>> Java version is 1.8.0_05
>>>>>
>>>>> Best greetings,
>>>>> Paweł Wielgus.
>>>>>
>>>>>
>>>>>
>>>>> [1] - for action defined in struts.xml
>>>>>
>>>>> SEVERE: Unable to read class [com.ppp.elsevier.struts.action.JournalCoverAction]
>>>>> java.lang.ArrayIndexOutOfBoundsException: 51966
>>>>> at org.objectweb.asm.ClassReader.readUTF8(Unknown Source)
>>>>> at org.objectweb.asm.ClassReader.readClass(Unknown Source)
>>>>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>>>>> at org.objectweb.asm.ClassReader.accept(Unknown Source)
>>>>> at com.opensymphony.xwork2.util.finder.ClassFinder.readClassDef(ClassFinder.java:717)
>>>>> at com.opensymphony.xwork2.util.finder.ClassFinder.<init>(ClassFinder.java:112)
>>>>> at org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:390)
>>>>> at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:347)
>>>>> at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53)
>>>>> at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:268)
>>>>> at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
>>>>> at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445)
>>>>> at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:489)
>>>>> at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
>>>>> at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
>>>>> at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:298)
>>>>> at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:119)
>>>>> at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4076)
>>>>> at org.apache.catalina.core.StandardContext.start(StandardContext.java:4730)
>>>>> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
>>>>> at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
>>>>> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
>>>>> at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
>>>>> at org.apache.catalina.core.StandardService.start(StandardService.java:525)
>>>>> at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
>>>>> at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>>>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>>> at java.lang.reflect.Method.invoke(Method.java:483)
>>>>> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
>>>>> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
>>>>>
>>>>>
>>>>>
>>>>> [2] - for action found by convention plugin
>>>>>
>>>>> SEVERE: Unable to read class
>>>>> [com.ppp.elsevier.struts.action.admin.reports.BuyedBookCategoriesAction]
>>>>> java.lang.ArrayIndexOutOfBoundsException: 12919
>>>>> at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>>>>> at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>>>>> at org.objectweb.asm.ClassReader.<init>(Unknown Source)
>>>>> at com.opensymphony.xwork2.util.finder.ClassFinder.readClassDef(ClassFinder.java:716)
>>>>> at com.opensymphony.xwork2.util.finder.ClassFinder.<init>(ClassFinder.java:112)
>>>>> at org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:390)
>>>>> at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:347)
>>>>> at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53)
>>>>> at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:268)
>>>>> at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
>>>>> at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445)
>>>>> at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:489)
>>>>> at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
>>>>> at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
>>>>> at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:298)
>>>>> at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:119)
>>>>> at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4076)
>>>>> at org.apache.catalina.core.StandardContext.start(StandardContext.java:4730)
>>>>> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
>>>>> at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
>>>>> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
>>>>> at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
>>>>> at org.apache.catalina.core.StandardService.start(StandardService.java:525)
>>>>> at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
>>>>> at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>>>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>>> at java.lang.reflect.Method.invoke(Method.java:483)
>>>>> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
>>>>> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
>>>>>
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