1 files changed, 67 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java b/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java
new file mode 100644
index 0000000000..d32af450ff
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/work/NotificationListener.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+package org.apache.tuscany.sca.work;
+
+/**
+ * A callback interface that can be optionally used for registering 
+ * interest in status of asynchronously scheduled unit of work.
+ *
+ * @version $Rev$ $Date$
+ */
+public interface NotificationListener<T extends Runnable> {
+    
+    /**
+     * Callback method when the unit of work is accepted.
+     * 
+     * @param work Work that was accepted.
+     */
+    void workAccepted(T work);
+    
+    /**
+     * Callback method when the unit of work is successfully completed.
+     * 
+     * @param work Work that was successfully completed.
+     */
+    void workCompleted(T work);
+    
+    /**
+     * Callback when the unit of work is started.
+     * 
+     * @param work Unit of work that was started.
+     */
+    void workStarted(T work);
+    
+    /**
+     * Callback when the unit of work is rejected.
+     * 
+     * @param work Unit of work that was rejected.
+     */
+    void workRejected(T work);
+    
+    /**
+     * Callback when the unit of work fails to complete.
+     * 
+     * @param work Unit of work that failed to complete.
+     * @param error Error that caused the unit of work to fail.
+     */
+    void workFailed(T work, Throwable error);
+    
+    
+
+}