Thierry Danard created NETBEANS-934:
---------------------------------------
Summary: A lock is kept on window settings file
Key: NETBEANS-934
URL: https://issues.apache.org/jira/browse/NETBEANS-934
Project: NetBeans
Issue Type: Bug
Components: platform - Window System
Affects Versions: 9.0
Reporter: Thierry Danard
Fix For: 9.0
I have an application that is based upon the NetBeans platform. In this
application, we have a session mechanism where users can save and restore the
state of the windows. The way this session mechanism works is:
To save:
* force a serialization of the window state (calling
org.netbeans.core.WindowSystem.save)
* save the content of all files in Windows2Local in a "session" file
* save the content of the tracker.properties file in the same "session" file
To restore:
* wipe out the content of the Windows2Local directory and replace it with the
saved content, then
* replace the content of the tracker.properties file
* force a clear/reload using reflection:
// load netbeans state from disk
System.gc();
System.gc();
FileUtil.refreshAll(); // needed to discard any caches copy of the setting
files
Class windowSystemClass =
Thread.currentThread().getContextClassLoader().loadClass("org.netbeans.core.WindowSystem");
Class windowManagerClass =
Thread.currentThread().getContextClassLoader().loadClass("org.netbeans.core.windows.WindowManagerImpl");
Class persistenceHandlerClass =
Thread.currentThread().getContextClassLoader().loadClass("org.netbeans.core.windows.PersistenceHandler");
Class persistenceManagerClass =
Thread.currentThread().getContextClassLoader().loadClass("org.netbeans.core.windows.persistence.PersistenceManager");
Object windowSystem = Lookup.getDefault().lookup(windowSystemClass);
Method method = windowSystemClass.getMethod("hide");
method.invoke(windowSystem);
method = windowManagerClass.getMethod("getInstance");
Object windowManager = method.invoke(windowManagerClass);
windowManager.getClass().getMethod("resetModel").invoke(windowManager);
windowManagerClass.getMethod("setRecentViewList",
String[].class).invoke(windowManager, new Object[]\{new String[0]});
method = persistenceManagerClass.getMethod("getDefault");
Object persistenceManager = method.invoke(persistenceManagerClass);
persistenceManager.getClass().getMethod("clear").invoke(persistenceManager);
method = persistenceHandlerClass.getMethod("getDefault");
Object persistenceHandler = method.invoke(persistenceHandlerClass);
persistenceHandler.getClass().getMethod("clear").invoke(persistenceHandler);
method = windowSystemClass.getMethod("load");
method.invoke(windowSystem);
method = windowSystemClass.getMethod("show");
method.invoke(windowSystem);
This used to work in versions 8.x, but no longer. Some ".settings" files are
locked. The files that stay locked vary, which points to a garbage collection
issue. File.canWrite() actually returns false for some files, which also makes
me think that the Data Objects underlying these objects are opening streams but
don't close them? Running from source, I can't find the issue.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@netbeans.apache.org
For additional commands, e-mail: commits-h...@netbeans.apache.org
For further information about the NetBeans mailing lists, visit:
https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists
