Bug 232356 - [GC] Option to remove the plugins automatically when

uninstall feature

3 files changed, 35 insertions, 4 deletions

diff --git a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdatePlugin.java b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdatePlugin.java
index 25bd314e6..a4dac61fd 100644
--- a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdatePlugin.java
+++ b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdatePlugin.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2010 IBM Corporation and others.
+ * Copyright (c) 2008, 2011 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -30,7 +30,10 @@ import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;
 
 /**
- * Activator class for the automatic updates plugin
+ * Activator class for the automatic updates plugin. The automatic updates plugin
+ * is responsible for scheduling background update checks, based on update settings
+ * specified by end user settings. The implementation of update checking is provided
+ * by another plugin that provides an IUpdateChecker implementation.
  */
 public class AutomaticUpdatePlugin extends AbstractUIPlugin {
 
diff --git a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdateScheduler.java b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdateScheduler.java
index cfb42f3cc..785a01845 100644
--- a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdateScheduler.java
+++ b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/AutomaticUpdateScheduler.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2010 IBM Corporation and others.
+ * Copyright (c) 2008, 2011 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -14,6 +14,7 @@ import com.ibm.icu.util.Calendar;
 import com.ibm.icu.util.ULocale;
 import org.eclipse.core.runtime.*;
 import org.eclipse.equinox.internal.p2.core.helpers.ServiceHelper;
+import org.eclipse.equinox.internal.p2.garbagecollector.GarbageCollector;
 import org.eclipse.equinox.internal.provisional.p2.updatechecker.*;
 import org.eclipse.equinox.p2.core.IProvisioningAgent;
 import org.eclipse.equinox.p2.engine.IProfile;
@@ -77,9 +78,35 @@ public class AutomaticUpdateScheduler implements IStartup {
 	}
 
 	public void earlyStartup() {
+		garbageCollect();
 		scheduleUpdate();
 	}
 
+	/**
+	 * Invokes the garbage collector to discard unused plugins, if specified by a 
+	 * corresponding preference.
+	 */
+	private void garbageCollect() {
+		// Nothing to do if we don't know what profile we are checking
+		if (profileId == null)
+			return;
+		//check if gc is enabled
+		IPreferenceStore pref = AutomaticUpdatePlugin.getDefault().getPreferenceStore();
+		if (!pref.getBoolean(PreferenceConstants.PREF_GC_ON_STARTUP))
+			return;
+		IProvisioningAgent agent = (IProvisioningAgent) ServiceHelper.getService(AutomaticUpdatePlugin.getContext(), IProvisioningAgent.SERVICE_NAME);
+		GarbageCollector collector = (GarbageCollector) agent.getService(GarbageCollector.SERVICE_NAME);
+		if (collector == null)
+			return;
+		IProfileRegistry registry = (IProfileRegistry) agent.getService(IProfileRegistry.SERVICE_NAME);
+		if (registry == null)
+			return;
+		IProfile profile = registry.getProfile(profileId);
+		if (profile == null)
+			return;
+		collector.runGC(profile);
+	}
+
 	public void shutdown() {
 		removeUpdateListener();
 	}
diff --git a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/PreferenceConstants.java b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/PreferenceConstants.java
index 6f2de2be3..398c7da78 100644
--- a/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/PreferenceConstants.java
+++ b/bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/PreferenceConstants.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- *  Copyright (c) 2008, 2010 IBM Corporation and others.
+ *  Copyright (c) 2008, 2011 IBM Corporation and others.
  *  All rights reserved. This program and the accompanying materials
  *  are made available under the terms of the Eclipse Public License v1.0
  *  which accompanies this distribution, and is available at
@@ -28,4 +28,5 @@ public class PreferenceConstants {
 	public static final String PREF_REMIND_240Minutes = "4 Hours";//$NON-NLS-1$
 	public static final String PREF_AUTO_UPDATE_INIT = "autoUpdateInit"; //$NON-NLS-1$
 	public static final String PREF_MIGRATED_34 = "migrated34Prefs"; //$NON-NLS-1$
+	public static final String PREF_GC_ON_STARTUP = "gcOnStartup"; //$NON-NLS-1$
 }