### Eclipse Workspace Patch 1.0
#P org.eclipse.mylyn.tasks.core
Index: plugin.xml
===================================================================
RCS file: /cvsroot/mylyn/org.eclipse.mylyn.tasks/org.eclipse.mylyn.tasks.core/plugin.xml,v
retrieving revision 1.29
diff -u -r1.29 plugin.xml
--- plugin.xml	1 Mar 2011 09:08:47 -0000	1.29
+++ plugin.xml	21 Jun 2011 10:04:58 -0000
@@ -13,6 +13,7 @@
 <plugin>
    <extension-point id="templates" name="templates" schema="schema/templates.exsd"/>
    <extension-point id="synchronizationParticipants" name="Synchronization Participants" schema="schema/synchronizationParticipants.exsd"/>
+   <extension-point id="taskActivationListeners" name="Task Activation Listeners" schema="schema/taskActivationListeners.exsd"/>
    
    <!--
    <extension 
Index: schema/taskActivationListeners.exsd
===================================================================
RCS file: schema/taskActivationListeners.exsd
diff -N schema/taskActivationListeners.exsd
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ schema/taskActivationListeners.exsd	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,109 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.eclipse.mylyn.tasks.core" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appInfo>
+         <meta.schema plugin="org.eclipse.mylyn.tasks.core" id="taskActivationListeners" name="Task Activation Listeners"/>
+      </appInfo>
+      <documentation>
+         This extension point can be used to register a task activation listener. The listener class must implement the interface org.eclipse.mylyn.tasks.core.ITaskActivationListener
+      </documentation>
+   </annotation>
+
+   <element name="extension">
+      <annotation>
+         <appInfo>
+            <meta.element />
+         </appInfo>
+      </annotation>
+      <complexType>
+         <choice minOccurs="0" maxOccurs="unbounded">
+            <element ref="listener" minOccurs="0" maxOccurs="unbounded"/>
+         </choice>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute translatable="true"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="listener">
+      <complexType>
+         <attribute name="id" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="listenerClass" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute kind="java" basedOn=":org.eclipse.mylyn.tasks.core.ITaskActivationListener"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="since"/>
+      </appInfo>
+      <documentation>
+         Since Mylyn Tasks 3.7
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="examples"/>
+      </appInfo>
+      <documentation>
+         [Enter extension point usage example here.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="apiinfo"/>
+      </appInfo>
+      <documentation>
+         [Enter API information here.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="implementation"/>
+      </appInfo>
+      <documentation>
+         [Enter information about supplied implementation of this extension point.]
+      </documentation>
+   </annotation>
+
+
+</schema>
Index: src/org/eclipse/mylyn/internal/tasks/core/TaskActivityManager.java
===================================================================
RCS file: /cvsroot/mylyn/org.eclipse.mylyn.tasks/org.eclipse.mylyn.tasks.core/src/org/eclipse/mylyn/internal/tasks/core/TaskActivityManager.java,v
retrieving revision 1.79
diff -u -r1.79 TaskActivityManager.java
--- src/org/eclipse/mylyn/internal/tasks/core/TaskActivityManager.java	15 Apr 2011 09:10:26 -0000	1.79
+++ src/org/eclipse/mylyn/internal/tasks/core/TaskActivityManager.java	21 Jun 2011 10:05:02 -0000
@@ -26,7 +26,11 @@
 import java.util.concurrent.CopyOnWriteArraySet;
 
 import org.eclipse.core.runtime.Assert;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.mylyn.commons.core.StatusHandler;
 import org.eclipse.mylyn.internal.tasks.core.TaskContainerDelta.Kind;
@@ -91,9 +95,31 @@
 		this.taskList = taskList;
 		this.repositoryManager = repositoryManager;
 		this.taskList.addChangeListener(TASKLIST_CHANGE_LISTENER);
+		initTaskListeners();
 		clear();
 	}
 
+	private void initTaskListeners() {
+		try {
+			IExtensionRegistry registry = Platform.getExtensionRegistry();
+			IConfigurationElement[] config = registry.getConfigurationElementsFor(ITasksCoreConstants.ID_PLUGIN
+					+ ".taskActivationListeners"); //$NON-NLS-1$
+			if (config.length > 0) {
+				Object object;
+				object = config[0].createExecutableExtension("listenerClass");//$NON-NLS-1$
+				if (object instanceof ITaskActivationListener) {
+					addActivationListener((ITaskActivationListener) object);
+				} else {
+					StatusHandler.log(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN,
+							"Registering of task activation listener failed: \"" + object + "\"")); //$NON-NLS-1$ //$NON-NLS-2$
+				}
+			}
+		} catch (CoreException e) {
+			StatusHandler.log(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN,
+					"Registering of task activation listener failed: \"" + e.getMessage() + "\"")); //$NON-NLS-1$ //$NON-NLS-2$
+		}
+	}
+
 	/**
 	 * Get the user specified first day of the week (Calendar.SUNDAY | Calendar.MONDAY)
 	 *