Refactored IntentPartitionService as WorkPartitionService

Change-Id: Ic5cf1978b7fce55b34f84eae9b03c8f9ddcfb9c1
diff --git a/core/api/src/main/java/org/onosproject/net/intent/WorkPartitionService.java b/core/api/src/main/java/org/onosproject/net/intent/WorkPartitionService.java
new file mode 100644
index 0000000..354bca4
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/intent/WorkPartitionService.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2016-present 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.net.intent;
+
+import java.util.function.Function;
+
+import org.onosproject.cluster.NodeId;
+import org.onosproject.event.ListenerService;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Service for partitioning work, represented via a unique identifier, onto cluster nodes.
+ */
+@Beta
+public interface WorkPartitionService
+    extends ListenerService<WorkPartitionEvent, WorkPartitionEventListener> {
+
+    /**
+     * Returns whether a given id maps to a partition owned by this
+     * instance.
+     *
+     * @param id id
+     * @param hasher function that maps id to a long value
+     * @return {@code true} if the id maps to a partition owned by this instance, otherwise {@code false}
+     */
+    <K> boolean isMine(K id, Function<K, Long> hasher);
+
+    /**
+     * Returns the owner for a given id.
+     *
+     * @param id id to query
+     * @param hasher function that maps id to a long value
+     * @return the leader node identifier
+     */
+    <K> NodeId getLeader(K id, Function<K, Long> hasher);
+}