Initial check-in for new p2p cluster messaging; to be refactored.
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/cluster/impl/TLVMessage.java b/core/store/dist/src/main/java/org/onlab/onos/store/cluster/impl/TLVMessage.java
new file mode 100644
index 0000000..246f8ee
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/cluster/impl/TLVMessage.java
@@ -0,0 +1,70 @@
+package org.onlab.onos.store.cluster.impl;
+
+import org.onlab.nio.AbstractMessage;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Base message for cluster-wide communications using TLVs.
+ */
+public class TLVMessage extends AbstractMessage {
+
+    private final int type;
+    private final byte[] data;
+
+    /**
+     * Creates an immutable TLV message.
+     *
+     * @param type   message type
+     * @param data   message data bytes
+     */
+    public TLVMessage(int type, byte[] data) {
+        this.length = data.length + TLVMessageStream.METADATA_LENGTH;
+        this.type = type;
+        this.data = data;
+    }
+
+    /**
+     * Returns the message type indicator.
+     *
+     * @return message type
+     */
+    public int type() {
+        return type;
+    }
+
+    /**
+     * Returns the data bytes.
+     *
+     * @return message data
+     */
+    public byte[] data() {
+        return data;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, data);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+        final TLVMessage other = (TLVMessage) obj;
+        return Objects.equals(this.type, other.type) &&
+                Objects.equals(this.data, other.data);
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this).add("type", type).add("length", length).toString();
+    }
+
+}