2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.pdpx.main.comm.listeners;
23 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
24 import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClient;
25 import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClientException;
26 import org.onap.policy.common.endpoints.listeners.ScoListener;
27 import org.onap.policy.common.utils.coder.StandardCoderObject;
28 import org.onap.policy.models.pdp.concepts.PdpStateChange;
29 import org.onap.policy.models.pdp.concepts.PdpStatus;
30 import org.onap.policy.models.pdp.enums.PdpState;
31 import org.onap.policy.pdpx.main.comm.XacmlPdpHearbeatPublisher;
32 import org.onap.policy.pdpx.main.comm.XacmlPdpMessage;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
36 public class XacmlPdpStateChangeListener extends ScoListener<PdpStateChange> {
38 private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpStateChangeListener.class);
40 private TopicSinkClient client;
42 private XacmlPdpHearbeatPublisher heartbeat;
45 * Constructs the object.
47 * @param client used to send back response after receiving state change message
49 public XacmlPdpStateChangeListener(TopicSinkClient client) {
50 super(PdpStateChange.class);
51 PdpStateChange message = new PdpStateChange();
52 message.setState(PdpState.PASSIVE);
53 heartbeat = new XacmlPdpHearbeatPublisher(client, message);
58 public void onTopicEvent(CommInfrastructure infra, String topic, StandardCoderObject sco, PdpStateChange message) {
60 XacmlPdpMessage newMessage = new XacmlPdpMessage();
62 PdpStatus newStatus = newMessage.formatStatusMessage(message.getState());
64 // Send State Change Status to PAP
65 if (!client.send(newStatus)) {
66 LOGGER.error("failed to send to topic sink {}", client.getTopic());
67 throw new TopicSinkClientException("failed to send to topic sink " + client.getTopic());
70 // Update the heartbeat internal state if publisher is running else create new publisher
71 if (XacmlPdpHearbeatPublisher.isAlive()) {
72 heartbeat.updateInternalState(message.getState());
74 heartbeat = new XacmlPdpHearbeatPublisher(client, message);
77 } catch (final Exception e) {
78 LOGGER.error("failed to handle the PDP State Change message.", e);