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+/*-
+ * ============LICENSE_START=======================================================
+ * policy-management
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.system;
+
+import java.util.List;
+import java.util.Properties;
+
+import org.onap.policy.drools.controller.DroolsController;
+import org.onap.policy.drools.event.comm.TopicSource;
+import org.onap.policy.drools.event.comm.Topic.CommInfrastructure;
+import org.onap.policy.drools.event.comm.TopicSink;
+import org.onap.policy.drools.properties.Lockable;
+import org.onap.policy.drools.properties.Startable;
+import org.onap.policy.drools.protocol.configuration.DroolsConfiguration;
+
+/**
+ * A Policy Controller is the higher level unit of control. It corresponds to
+ * the ncomp equivalent of a controller. It provides management of underlying
+ * resources associated with the policy controller, which is a) communication
+ * infrastructure, and b) policy-core (drools) session infrastructure
+ *
+ */
+public interface PolicyController extends Startable, Lockable {
+
+ /**
+ * name of this Policy Controller
+ */
+ public String getName();
+
+ /**
+ * Get the topic readers of interest for this controller
+ */
+ public List<? extends TopicSource> getTopicSources();
+
+ /**
+ * Get the topic readers of interest for this controller
+ */
+ public List<? extends TopicSink> getTopicSinks();
+
+ /**
+ * Get the Drools Controller
+ */
+ public DroolsController getDrools();
+
+ /**
+ * update maven configuration
+ *
+ * @param newDroolsConfiguration new drools configuration
+ * @return true if the update was successful, false otherwise
+ */
+ public boolean updateDrools(DroolsConfiguration newDroolsConfiguration);
+
+ /**
+ * Get the Properties
+ */
+ public Properties getProperties();
+
+ /**
+ * Attempts delivering of an String over communication
+ * infrastructure "busType"
+ *
+ * @param eventBus Communication infrastructure identifier
+ * @param topic topic
+ * @param event the event object to send
+ *
+ * @return true if successful, false if a failure has occurred.
+ * @throws IllegalArgumentException when invalid or insufficient
+ * properties are provided
+ * @throws IllegalStateException when the engine is in a state where
+ * this operation is not permitted (ie. locked or stopped).
+ * @throws UnsupportedOperationException when the engine cannot deliver due
+ * to the functionality missing (ie. communication infrastructure
+ * not supported.
+ */
+ public boolean deliver(CommInfrastructure busType, String topic,
+ Object event)
+ throws IllegalArgumentException, IllegalStateException,
+ UnsupportedOperationException;
+
+ /**
+ * halts and permanently releases all resources
+ * @throws IllegalStateException
+ */
+ public void halt() throws IllegalStateException;
+
+ /**
+ * Factory that tracks and manages Policy Controllers
+ */
+ public static PolicyControllerFactory factory =
+ new IndexedPolicyControllerFactory();
+
+}