ONOS-885: Group store interface definition and in-memory store implementation

Change-Id: I1125fbc23f1e58bcb8aaf5f67c02da610fa7ef25

ONOS-885: Group store interface definition and in-memory store implementation

Change-Id: Id3794bed63785e10ed86c0b5d90bf875d127224c
diff --git a/core/api/src/main/java/org/onosproject/net/group/StoredGroupEntry.java b/core/api/src/main/java/org/onosproject/net/group/StoredGroupEntry.java
new file mode 100644
index 0000000..b3557b4
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/group/StoredGroupEntry.java
@@ -0,0 +1,52 @@
+/*
+ * 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.net.group;
+
+/**
+ * Interface that defines set methods for a group entry
+ * that is stored in the system.
+ */
+public interface StoredGroupEntry extends Group {
+
+    /**
+     * Sets the new state for this entry.
+     *
+     * @param newState new group entry state.
+     */
+    void setState(Group.GroupState newState);
+
+    /**
+     * Sets how long this entry has been entered in the system.
+     *
+     * @param life epoch time
+     */
+    void setLife(long life);
+
+    /**
+     * Sets number of packets processed by this group entry.
+     *
+     * @param packets a long value
+     */
+    void setPackets(long packets);
+
+    /**
+     * Sets number of bytes processed by this group entry.
+     *
+     * @param bytes a long value
+     */
+    void setBytes(long bytes);
+
+}