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;
23 import java.util.Timer;
24 import java.util.TimerTask;
25 import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClient;
26 import org.onap.policy.models.pdp.concepts.PdpStatus;
27 import org.onap.policy.pdpx.main.XacmlState;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
31 public class XacmlPdpHearbeatPublisher extends TimerTask {
33 private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpHearbeatPublisher.class);
35 private final TopicSinkClient topicSinkClient;
38 * Tracks the state of this PDP.
40 private final XacmlState currentState;
43 * Current timer interval, in milliseconds.
45 private long intervalMs = 60000;
47 private Timer timer = null;
51 * Constructor for instantiating XacmlPdpPublisher.
53 * @param topicSinkClient used to send heart beat message
54 * @param state tracks the state of this PDP
56 public XacmlPdpHearbeatPublisher(TopicSinkClient topicSinkClient, XacmlState state) {
57 this.topicSinkClient = topicSinkClient;
58 this.currentState = state;
63 PdpStatus message = currentState.genHeartbeat();
64 LOGGER.info("Sending Xacml PDP heartbeat to the PAP - {}", message);
66 topicSinkClient.send(message);
70 * Method to terminate the heart beat.
72 public synchronized void terminate() {
81 * Restarts the timer if the interval has changed. If the timer is not currently
82 * running, then it updates the interval, but does not start the timer.
84 * @param intervalMs desired interval, or {@code null} to leave it unchanged
86 public synchronized void restart(Long intervalMs) {
87 if (intervalMs != null && intervalMs > 0 && intervalMs != this.intervalMs) {
88 this.intervalMs = intervalMs;
100 public synchronized void start() {
102 timer = new Timer(true);
103 timer.scheduleAtFixedRate(this, 0, this.intervalMs);