ECDeviceStore: DeviceStore built using ONOS distributed primitives: ECMap and DistributedSet (disabled right now)

Change-Id: I36fdcd635f982f2b8dac291c52be4662601ef9f0
diff --git a/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceKey.java b/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceKey.java
new file mode 100644
index 0000000..0896bf1
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/device/impl/DeviceKey.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2014-2015 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.device.impl;
+
+import java.util.Objects;
+
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.provider.ProviderId;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Key for DeviceDescriptions in ECDeviceStore.
+ */
+public class DeviceKey {
+    private final ProviderId providerId;
+    private final DeviceId deviceId;
+
+    public DeviceKey(ProviderId providerId, DeviceId deviceId) {
+        this.providerId = providerId;
+        this.deviceId = deviceId;
+    }
+
+    public ProviderId providerId() {
+        return providerId;
+    }
+
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(providerId, deviceId);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof DeviceKey)) {
+            return false;
+        }
+        DeviceKey that = (DeviceKey) obj;
+        return Objects.equals(this.deviceId, that.deviceId) &&
+               Objects.equals(this.providerId, that.providerId);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .toString();
+    }
+}