Eclipse plugin and JXE

A plugin is in place in WID. Now a bug of the plugin is fixed. When I replace the old one with the changed plugin into /plugins directory, and then start WID, the old code seems still to run... I find many JXE files with plugin names are under /configuration/org.eclipse.osgi/jxes directory, which seems to be plugin cache of Eclipse plugin registry. Therefore, to update the cached plugin, the corresponding JXE file should be deleted and then restart Eclipse. Now the new class is loaded and run well. Another way is to add -clean parameter to Eclipse startup command, which is to clean configurations. Here is a document which introduces what's behind Eclipse and JXE. Classloading from jar file is relatively expensive, so Eclipse use JXE file to provide internal class format to load class more efficiently at run-time. In addition, because all the data structures in the JXE are read-only, the entire JXE can be loaded using memory-mapping. Update: WID contains com.ibm.jxesupport plugin and the following setting in config.ini is to enable JXE support in WID:

#setup for jxe osgi.framework.extensions=com.ibm.jxesupport