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From Jörn Kottmann <kottm...@gmail.com>
Subject Re: AE Launcher Plugin
Date Thu, 01 Aug 2013 08:09:01 GMT

thanks for pointing this out. I don't think its a big deal for
most users, but we should of course fix it for the next release.

The issue UIMA-3133 Marshall created describes the problem nicely.

There are a couple of other issues that need to be fixed, like UIMA-3134
(was reported already some time ago) and we probably also want to add 
for CPE descriptors. The people over at cTAKES use them for their 
pipelines, I think
it might be more convenient for them if they could launch and debug them 
from eclipse without using our old tools.


On 07/31/2013 05:25 PM, Peter Klügl wrote:
> Hi,
> I can apply my changes to the launcher plugin, but I really like to know
> Jörn's opinion on this. I think he implemented the plugin and maybe I
> missed something.
> Best,
> Peter
> On 31.07.2013 17:03, Marshall Schor wrote:
>> Hi,
>> Thanks for that clear explanation.
>> I think the reason I don't see the issue when running in my test scenario, is
>> that the AE Descriptor under test was in a project which already included a
>> build-path dependency on uimaj-core.  So, the launcher had already added
>> uimaj-core to the class path :-).
>> I think your analysis is correct.  I think that the launcher will need just the
>> uimaj-core jar from the uimaj-ep-runtime plugin, so I might just add that.  Any
>> other parts of the uima framework that the "launched" thing might need, would be
>> the-launched-thing's own responsibility to include on Eclipse build path (which
>> the launcher makes part of the launched process's classpath).
>> -Marshall
>> On 7/31/2013 10:17 AM, Peter Klügl wrote:
>>> Hi,
>>> nope, there is no other posting.
>>> I haven't had the time yet to investigate my assumption, especially
>>> because I have no ready to use example.
>>> Let me explain my assumption:
>>> - I had a problem with the new layout (inlined jars) of the runtime
>>> plugin in the Ruta Workbench, to be more precise, with the classpath
>>> generated by the launch delegate
>>> - the new Ruta launcher was strongly inspired by the AE Launcher plugin
>>> concerning how the classpath of the new vm is generated
>>> - I fixed the problem for the Ruta launcher
>>> - the AE launcher code hasn't changed, therefore there might still occur
>>> the same problem
>>> About the problem in
>>> AnalysisEngineLaunchConfigurationDelegate.getClasspath():
>>> If not in development mode, the classpath is expanded by adding the jar
>>> of the bundles (e.g., runtime):
>>> extendedClasspath.add(pluginIdToJarPath("org.apache.uima.runtime"));
>>> I suppose that this does not work for inlined jars (e.g.,
>>> uimaj-core.jar) and causes ClassNotFoundExceptions or similar.
>>> If in development mode, the classpath is expanded by adding the jar entries:
>>> Bundle bundle =
>>> LauncherPlugin.getDefault().getBundle("org.apache.uima.runtime");
>>> if (bundle != null) {
>>> Enumeration<?> jarEnum = bundle.findEntries("/", "*.jar", true);
>>> while (jarEnum != null && jarEnum.hasMoreElements()) {
>>>     URL element = (URL) jarEnum.nextElement();
>>>     extendedClasspath.add(FileLocator.toFileURL(element).getFile());
>>>    }
>>> }
>>> I solved the problem in the Ruta launcher by simply adding the second
>>> code part to the first one. This actually resolves the jars within the
>>> bundle and add them to the classpath.
>>> Overall, the question is whether jars within jars that are listed in the
>>> classpath are correctly resolved by the vm.
>>> Best,
>>> Peter
>>> On 31.07.2013 15:05, Marshall Schor wrote:
>>>> Hi,
>>>> Sorry if I missed a posting elsewhere about what the issue was; can you point
>>>> to it, or describe it (and the fix :-) ) in a reply?
>>>> -Marshall
>>>> On 7/29/2013 7:07 AM, Peter Klügl wrote:
>>>>> Hi,
>>>>> I would assume that the launcher plugin does not work with the new
>>>>> layout of the runtime plugin, to be more precise, with an installed
>>>>> version of the runtime plugin. However, I haven't tested it yet and my
>>>>> concerns are only grounded on the problems with the ruta launcher.
>>>>> Best,
>>>>> Peter

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