ONOS checkin based on commit tag e796610b1f721d02f9b0e213cf6f7790c10ecd60

Change-Id: Ife8810491034fe7becdba75dda20de4267bd15cd

1 files changed, 39 insertions, 0 deletions

diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/SimpleTableHashPartitioner.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/SimpleTableHashPartitioner.java
new file mode 100644
index 00000000..8dc26e0f
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/SimpleTableHashPartitioner.java
@@ -0,0 +1,39 @@
+/*
+ * 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.consistent.impl;
+
+import java.util.List;
+
+/**
+ * A simple Partitioner that uses the map name hash to
+ * pick a partition.
+ * <p>
+ * This class uses a md5 hash based hashing scheme for hashing the map name to
+ * a partition. This partitioner maps all keys for a map to the same database
+ * partition.
+ */
+public class SimpleTableHashPartitioner extends DatabasePartitioner {
+
+    public SimpleTableHashPartitioner(List<Database> partitions) {
+        super(partitions);
+    }
+
+    @Override
+    public Database getPartition(String mapName, String key) {
+        return partitions.get(hash(mapName) % partitions.size());
+    }
+}