Introduce Eclipse Commons

[lgpl/argeo-commons.git] / eclipse / plugins / org.argeo.eclipse.ui / src / main / java / org / argeo / eclipse / spring / ApplicationContextTracker.java

diff --git a/eclipse/plugins/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/spring/ApplicationContextTracker.java b/eclipse/plugins/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/spring/ApplicationContextTracker.java
new file mode 100644 (file)
index 0000000..be53a97
--- /dev/null
+++ b/eclipse/plugins/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/spring/ApplicationContextTracker.java
@@ -0,0 +1,66 @@
+package org.argeo.eclipse.spring;\r
+\r
+import static java.text.MessageFormat.format;\r
+\r
+import org.osgi.framework.Bundle;\r
+import org.osgi.framework.BundleContext;\r
+import org.osgi.framework.FrameworkUtil;\r
+import org.osgi.framework.InvalidSyntaxException;\r
+import org.osgi.util.tracker.ServiceTracker;\r
+import org.springframework.context.ApplicationContext;\r
+\r
+/**\r
+ * @author Heiko Seeberger\r
+ */\r
+public class ApplicationContextTracker {\r
+\r
+       private static final String FILTER = "(&(objectClass=org.springframework.context.ApplicationContext)" //$NON-NLS-1$\r
+                       + "(org.springframework.context.service.name={0}))"; //$NON-NLS-1$\r
+\r
+       private ServiceTracker applicationContextServiceTracker;\r
+\r
+       /**\r
+        * @param contributorBundle\r
+        *              OSGi bundle for which the Spring application context is to be\r
+        *              tracked. Must not be null!\r
+        * @param factoryBundleContext\r
+        *      BundleContext object which can be used to track services\r
+        * @throws IllegalArgumentException\r
+        *              if the given bundle is null.\r
+        */\r
+       public ApplicationContextTracker(final Bundle contributorBundle, final BundleContext factoryBundleContext) {\r
+               final String filter = format(FILTER, contributorBundle.getSymbolicName());\r
+               try {\r
+                       applicationContextServiceTracker = new ServiceTracker(\r
+                                       factoryBundleContext, FrameworkUtil.createFilter(filter), null);\r
+                       applicationContextServiceTracker.open();\r
+               } catch (final InvalidSyntaxException e) {\r
+                       e.printStackTrace();\r
+               }\r
+       }\r
+\r
+       public void close() {\r
+               if (applicationContextServiceTracker != null) {\r
+                       applicationContextServiceTracker.close();\r
+               }\r
+       }\r
+\r
+       public ApplicationContext getApplicationContext() {\r
+               ApplicationContext applicationContext = null;\r
+               if (applicationContextServiceTracker != null) {\r
+                       try {\r
+                               applicationContext = (ApplicationContext) applicationContextServiceTracker\r
+                                               .waitForService(5000);\r
+                       } catch (InterruptedException e) {\r
+                               e.printStackTrace();\r
+                       }\r
+               }\r
+               return applicationContext;\r
+       }\r
+\r
+       @Override\r
+       protected void finalize() throws Throwable {\r
+               close();\r
+               super.finalize();\r
+       }\r
+}\r