SEBA-640 IgmpProxy should use distributed storage infrastructure of ONOS

Change-Id: I4b1c4d326a5501e9c0e046e3ee8d973ca5f73d70
diff --git a/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/AbstractGroupMemberStore.java b/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/AbstractGroupMemberStore.java
new file mode 100644
index 0000000..9a3af33
--- /dev/null
+++ b/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/AbstractGroupMemberStore.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.opencord.igmpproxy.impl.store.groupmember;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.store.AbstractStore;
+import org.opencord.igmpproxy.GroupMemberId;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Abstract implementation of group-member store.
+ */
+public abstract class AbstractGroupMemberStore extends AbstractStore<GroupMemberEvent, GroupMemberStoreDelegate>
+        implements GroupMemberStore {
+
+    protected Map<GroupMemberId, GroupMember> groupMemberMap;
+
+    protected AbstractGroupMemberStore() {
+
+    }
+
+    protected AbstractGroupMemberStore(Map<GroupMemberId, GroupMember> groupMemberMap) {
+        this.groupMemberMap = groupMemberMap;
+    }
+
+    @Override
+    public GroupMember putGroupMember(GroupMember groupMember) {
+        return groupMemberMap.put(groupMember.getGroupMemberId(), groupMember);
+    }
+
+    @Override
+    public GroupMember updateGroupMember(GroupMember groupMember) {
+        return groupMemberMap.replace(groupMember.getGroupMemberId(), groupMember);
+    }
+
+    @Override
+    public GroupMember removeGroupMember(GroupMemberId groupMemberId) {
+        return groupMemberMap.remove(groupMemberId);
+    }
+
+    @Override
+    public GroupMember getGroupMember(GroupMemberId groupMemberId) {
+        return groupMemberMap.getOrDefault(groupMemberId, null);
+    }
+
+    @Override
+    public Set<GroupMemberId> getAllGroupMemberIds() {
+        return ImmutableSet.copyOf(groupMemberMap.keySet());
+    }
+
+    @Override
+    public Collection<GroupMember> getAllGroupMembers() {
+        return ImmutableList.copyOf(groupMemberMap.values());
+    }
+}