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not find META-INF/extensions.idx #21

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melin opened this issue Aug 24, 2014 · 11 comments
Closed

not find META-INF/extensions.idx #21

melin opened this issue Aug 24, 2014 · 11 comments

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@melin
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melin commented Aug 24, 2014

Exception in thread "main" java.lang.NullPointerException
at ro.fortsoft.pf4j.DefaultExtensionFinder.readPluginsIndexFiles(DefaultExtensionFinder.java:176)
at ro.fortsoft.pf4j.DefaultExtensionFinder.readIndexFiles(DefaultExtensionFinder.java:132)
at ro.fortsoft.pf4j.DefaultExtensionFinder.find(DefaultExtensionFinder.java:54)
at ro.fortsoft.pf4j.DefaultPluginManager.getExtensions(DefaultPluginManager.java:559)
@decebals
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Can you supply more information, please. When you receive this exception? You run your application from IDE or from command line?
I inspect that line and I see that probably you have a plugin without extensions.idx. Do you define a plugin without extensions (only with extension points) ?
I will improve the code (more defense) to prevent this situation.

decebals added a commit that referenced this issue Aug 24, 2014
@decebals
defense for #21
579bae7
@melin
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melin commented Aug 25, 2014

In eclipse to run the demo
########################################
PF4J-DEMO
########################################
2014-08-25 12:11:17,589 INFO ro.fortsoft.pf4j.DefaultPluginManager - PF4J version 0.0.0 in 'deployment' mode
2014-08-25 12:11:17,673 INFO ro.fortsoft.pf4j.DefaultPluginManager - Enabled plugins: []
2014-08-25 12:11:17,673 INFO ro.fortsoft.pf4j.DefaultPluginManager - Disabled plugins: []
2014-08-25 12:11:17,673 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Lookup plugins in 'H:\codes\opensources\github\pf4j\demo\app\plugins'
2014-08-25 12:11:17,688 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Found 2 possible plugins: [plugins\pf4j-demo-plugin1-0.10.0-SNAPSHOT, plugins\pf4j-demo-plugin2-0.10.0-SNAPSHOT]
2014-08-25 12:11:17,688 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Find plugin descriptor '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,688 DEBUG ro.fortsoft.pf4j.ManifestPluginDescriptorFinder - Lookup plugin descriptor in 'plugins\pf4j-demo-plugin1-0.10.0-SNAPSHOT\classes\META-INF\MANIFEST.MF'
2014-08-25 12:11:17,692 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Descriptor PluginDescriptor [pluginId=welcome-plugin, pluginClass=ro.fortsoft.pf4j.demo.welcome.WelcomePlugin, version=0.0.1, provider=Decebal Suiu, dependencies=[]]
2014-08-25 12:11:17,692 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Class 'ro.fortsoft.pf4j.demo.welcome.WelcomePlugin' for plugin '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,692 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Loading plugin '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,698 DEBUG ro.fortsoft.pf4j.PluginLoader - Created class loader 'ro.fortsoft.pf4j.PluginClassLoader@45290155'
2014-08-25 12:11:17,699 DEBUG ro.fortsoft.pf4j.PluginLoader - Found 'H:\codes\opensources\github\pf4j\demo\app\plugins\pf4j-demo-plugin1-0.10.0-SNAPSHOT\classes' directory
2014-08-25 12:11:17,699 DEBUG ro.fortsoft.pf4j.PluginLoader - Added 'H:\codes\opensources\github\pf4j\demo\app\plugins\pf4j-demo-plugin1-0.10.0-SNAPSHOT\classes' to the class loader path
2014-08-25 12:11:17,701 DEBUG ro.fortsoft.pf4j.PluginLoader - Added 'H:\codes\opensources\github\pf4j\demo\app\plugins\pf4j-demo-plugin1-0.10.0-SNAPSHOT\lib\commons-lang-2.6.jar' to the class loader path
2014-08-25 12:11:17,701 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Loaded plugin '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,701 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Creating wrapper for plugin '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,720 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Created wrapper 'PluginWrapper [descriptor=PluginDescriptor [pluginId=welcome-plugin, pluginClass=ro.fortsoft.pf4j.demo.welcome.WelcomePlugin, version=0.0.1, provider=Decebal Suiu, dependencies=[]], pluginPath=/pf4j-demo-plugin1-0.10.0-SNAPSHOT]' for plugin '/pf4j-demo-plugin1-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,720 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Find plugin descriptor '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,720 DEBUG ro.fortsoft.pf4j.ManifestPluginDescriptorFinder - Lookup plugin descriptor in 'plugins\pf4j-demo-plugin2-0.10.0-SNAPSHOT\classes\META-INF\MANIFEST.MF'
2014-08-25 12:11:17,735 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Descriptor PluginDescriptor [pluginId=hello-plugin, pluginClass=ro.fortsoft.pf4j.demo.hello.HelloPlugin, version=0.0.1, provider=Decebal Suiu, dependencies=[]]
2014-08-25 12:11:17,735 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Class 'ro.fortsoft.pf4j.demo.hello.HelloPlugin' for plugin '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,735 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Loading plugin '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,735 DEBUG ro.fortsoft.pf4j.PluginLoader - Created class loader 'ro.fortsoft.pf4j.PluginClassLoader@1bddf367'
2014-08-25 12:11:17,735 DEBUG ro.fortsoft.pf4j.PluginLoader - Found 'H:\codes\opensources\github\pf4j\demo\app\plugins\pf4j-demo-plugin2-0.10.0-SNAPSHOT\classes' directory
2014-08-25 12:11:17,736 DEBUG ro.fortsoft.pf4j.PluginLoader - Added 'H:\codes\opensources\github\pf4j\demo\app\plugins\pf4j-demo-plugin2-0.10.0-SNAPSHOT\classes' to the class loader path
2014-08-25 12:11:17,736 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Loaded plugin '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,736 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Creating wrapper for plugin '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,736 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Created wrapper 'PluginWrapper [descriptor=PluginDescriptor [pluginId=hello-plugin, pluginClass=ro.fortsoft.pf4j.demo.hello.HelloPlugin, version=0.0.1, provider=Decebal Suiu, dependencies=[]], pluginPath=/pf4j-demo-plugin2-0.10.0-SNAPSHOT]' for plugin '/pf4j-demo-plugin2-0.10.0-SNAPSHOT'
2014-08-25 12:11:17,757 DEBUG ro.fortsoft.pf4j.DependencyResolver - Graph:
welcome-plugin -> []
hello-plugin -> []
2014-08-25 12:11:17,758 DEBUG ro.fortsoft.pf4j.DependencyResolver - Plugins order: [welcome-plugin, hello-plugin]
2014-08-25 12:11:17,758 INFO ro.fortsoft.pf4j.DefaultPluginManager - Plugin 'welcome-plugin' resolved
2014-08-25 12:11:17,758 INFO ro.fortsoft.pf4j.DefaultPluginManager - Plugin 'hello-plugin' resolved
2014-08-25 12:11:17,758 INFO ro.fortsoft.pf4j.DefaultPluginManager - Start plugin 'welcome-plugin:0.0.1'
2014-08-25 12:11:17,758 DEBUG ro.fortsoft.pf4j.DefaultExtensionFactory - Create instance for plugin 'ro.fortsoft.pf4j.demo.welcome.WelcomePlugin'
WelcomePlugin.start()
2014-08-25 12:11:17,805 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Fire 'PluginStateEvent [plugin=welcome-plugin, newState=STARTED, oldState=CREATED]' to 'ro.fortsoft.pf4j.DefaultExtensionFinder@3ae490fa'
2014-08-25 12:11:17,805 INFO ro.fortsoft.pf4j.DefaultPluginManager - Start plugin 'hello-plugin:0.0.1'
2014-08-25 12:11:17,805 DEBUG ro.fortsoft.pf4j.DefaultExtensionFactory - Create instance for plugin 'ro.fortsoft.pf4j.demo.hello.HelloPlugin'
HelloPlugin.start()
2014-08-25 12:11:17,830 DEBUG ro.fortsoft.pf4j.DefaultPluginManager - Fire 'PluginStateEvent [plugin=hello-plugin, newState=STARTED, oldState=CREATED]' to 'ro.fortsoft.pf4j.DefaultExtensionFinder@3ae490fa'
2014-08-25 12:11:17,845 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - Checking extension point 'ro.fortsoft.pf4j.demo.api.Greeting'
2014-08-25 12:11:17,846 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - Finding extensions for extension point 'ro.fortsoft.pf4j.demo.api.Greeting'
2014-08-25 12:11:17,847 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - Reading extensions index files from classpath
2014-08-25 12:11:17,847 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - No extensions found
2014-08-25 12:11:17,848 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - Reading extensions index files from plugins
2014-08-25 12:11:17,848 DEBUG ro.fortsoft.pf4j.DefaultExtensionFinder - Reading extensions index file for plugin 'welcome-plugin'
Exception in thread "main" java.lang.NullPointerException
at ro.fortsoft.pf4j.DefaultExtensionFinder.readPluginsIndexFiles(DefaultExtensionFinder.java:178)
at ro.fortsoft.pf4j.DefaultExtensionFinder.readIndexFiles(DefaultExtensionFinder.java:134)
at ro.fortsoft.pf4j.DefaultExtensionFinder.find(DefaultExtensionFinder.java:54)
at ro.fortsoft.pf4j.DefaultPluginManager.getExtensions(DefaultPluginManager.java:559)
at ro.fortsoft.pf4j.demo.Boot.main(Boot.java:49)

libinsong1204@gmail.com

From: Decebal Suiu
Date: 2014-08-25 03:20
To: decebals/pf4j
CC: melin
Subject: Re: [pf4j] not find META-INF/extensions.idx (#21)
Can you supply more information, please. When you receive this exception? You run your application from IDE or from command line?
I inspect that line and I see that probably you have a plugin without extensions.idx. Do you define a plugin without extensions (only with extension points) ?
I will improve the code (more defense) to prevent this situation.
—
Reply to this email directly or view it on GitHub.

@decebals
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If you use Eclipse than make sure annotation processing is enabled at least for any projects registering objects using annotations. In the properties for your new project go to Java Compiler -> Annotation Processing
Check the “Enable Project Specific Settings” and make sure “Enable annotation processing” is checked.

@decebals
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Any news? If my last comment helped you please tell me to improve readme file.

@decebals decebals closed this as completed Sep 9, 2014
@codespelunker
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Any chance a production release will be made available soon with this fix in it?

@decebals
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decebals commented Apr 9, 2015

I don't understand you. Do you have the same problem? If your response is yes, please give me more details about the context when this appears.

@decebals decebals reopened this Apr 9, 2015
@decebals
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decebals commented Apr 9, 2015

Do you use the last pf4j version?

@codespelunker
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Sorry, I didn't get a notification that you had replied. Apologies for the delay.

Yes, with the latest p4fj release, release-0.9.0 (on 7/30/14), we saw this same problem. Getting the latest from master solved the issue for us. I was simply wondering if you were going to make a new release.

@decebals
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Sure. Monday I will release 0.9.1

@gearlles
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gearlles commented Aug 9, 2015

I have the same problem. Are you going to release the fix soon?

@decebals
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Please check the SNAPSHOT. If everything is OK I will release a new version.

@decebals decebals mentioned this issue Aug 10, 2015
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@decebals decebals closed this as completed Sep 2, 2015
@WolfgangFahl WolfgangFahl mentioned this issue Nov 13, 2018
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@decebals decebals mentioned this issue May 1, 2019
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@melin @decebals @codespelunker @gearlles