[ONOS-6446] ObjectiveTrackerService is not a public service
If an application want to create custom Intent installer, it might need
ObjectiveTrackerService.
However, the ObjectiveTrackerService is not public api (in /core/net,
should be /core/api); so application outside the ONOS can't use it.
Move ObjectiveTrackerService and it's dependence to /code/api
Change-Id: Ie2ad8dd9d39ccae1c91f4b57887089e0aec83ede
diff --git a/core/api/src/main/java/org/onosproject/net/intent/ObjectiveTrackerService.java b/core/api/src/main/java/org/onosproject/net/intent/ObjectiveTrackerService.java
new file mode 100644
index 0000000..78a28eb
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/intent/ObjectiveTrackerService.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2014-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 org.onosproject.net.NetworkResource;
+
+import java.util.Collection;
+
+/**
+ * Auxiliary service for tracking intent path flows and for notifying the
+ * intent service of environment changes via topology change delegate.
+ */
+public interface ObjectiveTrackerService {
+
+ /**
+ * Sets a topology change delegate.
+ *
+ * @param delegate topology change delegate
+ */
+ void setDelegate(TopologyChangeDelegate delegate);
+
+ /**
+ * Unsets topology change delegate.
+ *
+ * @param delegate topology change delegate
+ */
+ void unsetDelegate(TopologyChangeDelegate delegate);
+
+ /**
+ * Adds a path flow to be tracked.
+ *
+ * @param intentKey intent identity on whose behalf the path is being tracked
+ * @param resources resources to track
+ */
+ // TODO consider using the IntentData here rather than just the key
+ void addTrackedResources(Key intentKey,
+ Collection<NetworkResource> resources);
+
+ /**
+ * Removes a path flow to be tracked.
+ *
+ * @param intentKey intent identity on whose behalf the path is being tracked
+ * @param resources resources to stop tracking
+ */
+ void removeTrackedResources(Key intentKey,
+ Collection<NetworkResource> resources);
+
+ /**
+ * Submits the specified intent data to be tracked.
+ *
+ * @param intentData intent data object to be tracked
+ */
+ void trackIntent(IntentData intentData);
+}