1 files changed, 85 insertions, 0 deletions
diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/flow/ReplicaInfo.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/flow/ReplicaInfo.java
new file mode 100644
index 00000000..6011c16c
--- /dev/null
+++ b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/flow/ReplicaInfo.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2014 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.flow;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.onosproject.cluster.NodeId;
+
+import com.google.common.base.Objects;
+import com.google.common.base.Optional;
+
+/**
+ * Class to represent placement information about Master/Backup copy.
+ */
+public final class ReplicaInfo {
+
+    private final Optional<NodeId> master;
+    private final List<NodeId> backups;
+
+    /**
+     * Creates a ReplicaInfo instance.
+     *
+     * @param master NodeId of the node where the master copy should be
+     * @param backups list of NodeId, where backup copies should be placed
+     */
+    public ReplicaInfo(NodeId master, List<NodeId> backups) {
+        this.master = Optional.fromNullable(master);
+        this.backups = checkNotNull(backups);
+    }
+
+    /**
+     * Returns the NodeId, if there is a Node where the master copy should be.
+     *
+     * @return NodeId, where the master copy should be placed
+     */
+    public Optional<NodeId> master() {
+        return master;
+    }
+
+    /**
+     * Returns the collection of NodeId, where backup copies should be placed.
+     *
+     * @return collection of NodeId, where backup copies should be placed
+     */
+    public List<NodeId> backups() {
+        return backups;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(master, backups);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof ReplicaInfo))  {
+            return false;
+        }
+        ReplicaInfo that = (ReplicaInfo) other;
+        return Objects.equal(this.master, that.master) &&
+                Objects.equal(this.backups, that.backups);
+    }
+
+    // for Serializer
+    private ReplicaInfo() {
+        this.master = Optional.absent();
+        this.backups = Collections.emptyList();
+    }
+}