[Persistence] Add PersistingMutationListener

...to automatically trigger persistence after mutation.
#825

platform/core/src/runs/PersistingMutationListener.js

@@ -0,0 +1,42 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed 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.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define*/
+
+define([], function () {
+    'use strict';
+
+    /**
+     * Listens for mutation on domain objects and triggers mutation when
+     * it occurs.
+     * @param {Topic} topic the `topic` service; used to listen for mutation
+     * @memberof platform/core
+     */
+    function PersistingMutationListener(topic) {
+        var mutationTopic = topic('mutation');
+        mutationTopic.listen(function (domainObject) {
+            var persistence = domainObject.getCapability('persistence');
+            persistence.persist();
+        });
+    }
+
+    return PersistingMutationListener;
+});