oxygen plugin that has dependency of other jar

[vishwavaranasi]

Hello Team , we have a oxygen plugin that has dependency of other jar , lets say library.jar , this library jar is custom file system provider implementation , this jar has under resources META-INF/services/java.nio.file.spi.FileSystemProvider(it has the entry of com.xxx.xxx.xx.xxx.CustomFileSystemProvider.

issue here the plugin not able to call the any methods inside CustomFileSystemProvider. any help would be appreciated , is there anything we need provide to our plugin.jar?

we have copied library.jar and plugin.ajr under plugins folder.


Thanks,
vishwa

[Radu]

Hi,
Each Oxygen plugin has a "plugin.xml" descriptor file which references JAR libraries. Oxygen loads all those JAR libraries for each plugin when it starts. So if a plugin uses a JAR library it needs to refer to it in the plugin.xml, otherwise it would need to create its own class loader and dynamically load it.

https://www.oxygenxml.com/doc/ug-editor ... lugin.html

Regards,
Radu

[vishwavaranasi]

Thanks Radu ,

we have already copied manually the dependent jars to lib as below

Code: Select all

C:\<path>\oxygen\plugins\oxygen-plugin-workspace-access-1.0\lib\oxygen-plugin-workspace-access-1.0.jar
C:\<path>\oxygen\plugins\oxygen-plugin-workspace-access-1.0\lib\library.jar
C:\<path>\oxygen\plugins\oxygen-plugin-workspace-access-1.0\plugin.xml

and plugin.xml as below

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>
<!-- The plugin.dtd file is located in the OXYGEN_INSATALL_DIR/plugins directory -->
<!DOCTYPE plugin SYSTEM "../plugin.dtd">

<plugin
 id="com.xxx.xx.xx.xx.WorkspaceAccess"
 name="xxxWorkspaceAccess"
 description="Test"
 version="${project.version}"
 vendor="oXygen XML"
 class="com.xx.xx.xx.workspace.WorkspaceAccessPlugin"
 classLoaderType="preferReferencedResources">
 
 <runtime>
	<librariesFolder name="lib" />
    <library name="target/classes" />	 
    <librariesFolder name="target/lib" />	 
 </runtime>
 

 <extension type="WorkspaceAccess" 
  class="com.xx.xx.xx.workspace.xxxWorkspaceAccessPluginExtension"/>
 
  
  <!--
  <extension type="WorkspaceAccess" 
  class="com.xxx.xx.xx.workspace.CustomWorkspaceAccessPluginExtension"/>-->
  
 
  <!--The sample view which will present messages from the sample plugin.-->
  <view id="xxxxWorkspaceAccessID" initialSide="WEST" initialRow="0" description="xxOxygen Workspace" />
  <!--The sample toolbar which will present messages from the sample plugin.-->
  <toolbar id="xxxxWorkspaceAccessID" initialSide="NORTH" initialRow="1"/>
</plugin>

[Radu]

Hi,

This looks good to me, so what Exception gets thrown by Oxygen at runtime?

Regards,
Radu

[vishwavaranasi]

Hello Radu , the library.jar has has a custom java.nio.file.FileSystemProvider implemented named "test123" , the library.jar has META-INF/services/java.nio.file.spi.FileSystemProvider (this is a text file has the entry like ->com.xxx.xxx.xxx.xxx.CustomFileSystemProvider)

from the plugin we tried invoking as
FileSystem fs = FileSystems.newFileSystem(new URI("test123://default"), env);

plugin registered ..and opened oxygen , when we invoke from one of the plugin functions we got the following error.
Exception in thread "AWT-EventQueue-0" java.nio.file.FileSystemNotFoundException: Provider "test123" not installed

thanks for your help on this.

Thanks,
vishwa

[Radu]

Hi Vishwa,

By default the plugin has its own Java class loader, maybe you can add all your libraries with higher priority:

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 <runtime>
	<librariesFolder name="lib"  scope="global"/>
    <library name="target/classes"  scope="global"/>	 
    <librariesFolder name="target/lib"  scope="global"/>	 
 </runtime>

Does that work for you?
If not maybe use this method instead:

Code: Select all

java.nio.file.FileSystems.newFileSystem(URI, Map<String, ?>, ClassLoader)

and for the ClassLoader parameter pass something like "YourPluginClass.class.getClassLoader()" so that you use the plugin's own class loader to search for the implementation.

Regards,
Radu

[vishwavaranasi]

Thanks a lot Radu..
passing class loader xxxx.class.getClassLoader() to FileSystems.newFileSystem - worked for us.

Thanks,
vishwa