Initial implementation of Meter Service (needs testing)

Change-Id: Ie07bd3e2bd7c67a6499c965d8926eb361ad16462

store impl started

Change-Id: Ib8b474f40dcecff335a421c12ad149fe9830c427

full implementation

Change-Id: Ie59fd61d02972bd04d887bdcca9745793b880681
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/meter/MeterStore.java b/incubator/api/src/main/java/org/onosproject/incubator/net/meter/MeterStore.java
new file mode 100644
index 0000000..232eedd
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/meter/MeterStore.java
@@ -0,0 +1,78 @@
+/*
+ * 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.incubator.net.meter;
+
+import org.onosproject.store.Store;
+
+import java.util.Collection;
+
+/**
+ * Entity that stores and distributed meter objects.
+ */
+public interface MeterStore extends Store<MeterEvent, MeterStoreDelegate> {
+
+    /**
+     * Adds a meter to the store.
+     *
+     * @param meter a meter
+     */
+    void storeMeter(Meter meter);
+
+    /**
+     * Deletes a meter from the store.
+     *
+     * @param meter a meter
+     */
+    void deleteMeter(Meter meter);
+
+    /**
+     * Updates a meter whose meter id is the same as the passed meter.
+     *
+     * @param meter a new meter
+     */
+    void updateMeter(Meter meter);
+
+    /**
+     * Updates a given meter's state with the provided state.
+     * @param meter a meter
+     */
+    void updateMeterState(Meter meter);
+
+    /**
+     * Obtains a meter matching the given meter id.
+     *
+     * @param meterId a meter id
+     * @return a meter
+     */
+    Meter getMeter(MeterId meterId);
+
+    /**
+     * Returns all meters stored in the store.
+     *
+     * @return a collection of meters
+     */
+    Collection<Meter> getAllMeters();
+
+    /**
+     * Update the store by deleting the failed meter.
+     * Notifies the delegate that the meter failed to allow it
+     * to nofity the app.
+     *
+     * @param op a failed meter operation
+     * @param reason a failure reason
+     */
+    void failedMeter(MeterOperation op, MeterFailReason reason);
+}