Implemented a PartitionManager to keep track of partitions
assigned to instances.

Also updated GossipIntentStore a little to the new API. This work is not
yet complete.

Change-Id: I64d1779b669de51c35da686b65006a80ac4819b0
diff --git a/core/store/dist/src/main/java/org/onosproject/store/intent/impl/PartitionService.java b/core/store/dist/src/main/java/org/onosproject/store/intent/impl/PartitionService.java
new file mode 100644
index 0000000..1062b65
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/intent/impl/PartitionService.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.store.intent.impl;
+
+/**
+ * Service for interacting with the partition-to-instance assignments.
+ */
+public interface PartitionService {
+
+    /**
+     * Returns whether the given intent key is in a partition owned by this
+     * instance or not.
+     *
+     * @param intentKey intent key to query
+     * @return true if the key is owned by this instance, otherwise false
+     */
+    boolean isMine(String intentKey);
+
+    // TODO add API for rebalancing partitions
+}