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.pdpx.main.XacmlState;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
34 public class XacmlPdpStateChangeListener extends ScoListener<PdpStateChange> {
36 private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpStateChangeListener.class);
38 private final TopicSinkClient client;
40 private final XacmlState state;
43 * Constructs the object.
45 * @param client used to send back response after receiving state change message
46 * @param state tracks the state of this PDP
48 public XacmlPdpStateChangeListener(TopicSinkClient client, XacmlState state) {
49 super(PdpStateChange.class);
55 public void onTopicEvent(CommInfrastructure infra, String topic, StandardCoderObject sco, PdpStateChange message) {
58 if (!state.shouldHandle(message)) {
59 LOGGER.debug("PDP State Change message discarded - {}", message);
63 LOGGER.info("PDP State Change message has been received from the PAP - {}", message);
64 PdpStatus newStatus = state.updateInternalState(message);
66 // Send State Change Status to PAP
67 if (!client.send(newStatus)) {
68 LOGGER.error("failed to send to topic sink {}", client.getTopic());
69 throw new TopicSinkClientException("failed to send to topic sink " + client.getTopic());
72 } catch (final Exception e) {
73 LOGGER.error("failed to handle the PDP State Change message.", e);