Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.ui / src / org / simantics / ui / workbench / WorkbenchShutdownServiceImpl.java

diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/workbench/WorkbenchShutdownServiceImpl.java b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/WorkbenchShutdownServiceImpl.java
new file mode 100644 (file)
index 0000000..ea9d14f
--- /dev/null
+++ b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/WorkbenchShutdownServiceImpl.java
@@ -0,0 +1,79 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.ui.workbench;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Hashtable;\r
+import java.util.List;\r
+\r
+import org.osgi.framework.BundleContext;\r
+import org.osgi.framework.ServiceRegistration;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class WorkbenchShutdownServiceImpl implements WorkbenchShutdownService {\r
+\r
+    private static ServiceRegistration service = null;\r
+\r
+    private final List<Runnable>       hooks   = new ArrayList<Runnable>();\r
+\r
+    /**\r
+     * Invoked by the bundle activator to initialize the cache service.\r
+     * \r
+     * @param context the bundle context to register the service with\r
+     */\r
+    @SuppressWarnings({ "unchecked", "rawtypes" })\r
+    public synchronized static void initialize(BundleContext context) {\r
+        if (service == null) {\r
+            service = context.registerService(WorkbenchShutdownService.class.getName(), new WorkbenchShutdownServiceImpl(), new Hashtable());\r
+        }\r
+    }\r
+\r
+    /**\r
+     * Invoked by the bundle activator to close the cache service.\r
+     */\r
+    public synchronized static void close() {\r
+        if (service != null) {\r
+            service.unregister();\r
+            service = null;\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public synchronized void registerShutdownHook(Runnable hook) {\r
+        hooks.add(hook);\r
+    }\r
+\r
+    @Override\r
+    public synchronized void doShutdown() {\r
+        Runnable[] rs = hooks.toArray(new Runnable[0]);\r
+        hooks.clear();\r
+        for (Runnable hook : rs) {\r
+            try {\r
+                hook.run();\r
+            } catch (Exception e) {\r
+                handleException(hook, e);\r
+            } catch (LinkageError e) {\r
+                handleException(hook, e);\r
+            } catch (AssertionError e) {\r
+                handleException(hook, e);\r
+            }\r
+        }\r
+    }\r
+\r
+    protected void handleException(Object source, Throwable t) {\r
+        System.err.println(getClass().getSimpleName() + ": workbench shutdown hook " + source + " caused unexpected exception:");\r
+        t.printStackTrace();\r
+    }\r
+\r
+}\r