2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
6 * Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
7 * Modifications Copyright (C) 2022 Nordix Foundation.
8 * ================================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.pap.main.comm;
25 import static org.assertj.core.api.Assertions.assertThatThrownBy;
26 import static org.junit.Assert.assertEquals;
27 import static org.junit.Assert.assertNotNull;
28 import static org.junit.Assert.assertNull;
29 import static org.junit.Assert.assertTrue;
31 import java.util.concurrent.ConcurrentLinkedQueue;
32 import java.util.concurrent.Semaphore;
33 import java.util.concurrent.TimeUnit;
34 import org.junit.After;
35 import org.junit.AfterClass;
36 import org.junit.Before;
37 import org.junit.BeforeClass;
38 import org.junit.Test;
39 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
40 import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
41 import org.onap.policy.common.endpoints.event.comm.TopicListener;
42 import org.onap.policy.common.utils.coder.Coder;
43 import org.onap.policy.common.utils.coder.CoderException;
44 import org.onap.policy.common.utils.coder.StandardCoder;
45 import org.onap.policy.models.pdp.concepts.PdpMessage;
46 import org.onap.policy.models.pdp.concepts.PdpStateChange;
47 import org.onap.policy.pap.main.PolicyPapException;
48 import org.onap.policy.pap.main.parameters.CommonTestData;
49 import org.onap.policy.pap.main.parameters.PapParameterGroup;
51 public class PublisherTest extends Threaded {
53 // these messages will have different request IDs
54 private static final PdpStateChange MSG1 = new PdpStateChange();
55 private static final PdpStateChange MSG2 = new PdpStateChange();
57 // MSG1 & MSG2, respectively, encoded as JSON
58 private static final String JSON1;
59 private static final String JSON2;
61 protected static final String PDP_PAP_TOPIC = "POLICY-PDP-PAP";
65 Coder coder = new StandardCoder();
66 JSON1 = coder.encode(MSG1);
67 JSON2 = coder.encode(MSG2);
69 } catch (CoderException e) {
70 throw new ExceptionInInitializerError(e);
75 * Max time to wait, in milliseconds, for a thread to terminate or for a message to be
78 private static final long MAX_WAIT_MS = 5000;
80 private Publisher<PdpMessage> pub;
81 private MyListener listener;
84 * Configures the topic and attaches a listener.
88 public static void setUpBeforeClass() {
89 final PapParameterGroup parameterGroup = new CommonTestData().getPapParameterGroup(6969);
90 TopicEndpointManager.getManager().shutdown();
92 TopicEndpointManager.getManager().addTopics(parameterGroup.getTopicParameterGroup());
93 TopicEndpointManager.getManager().start();
97 public static void tearDownAfterClass() {
98 TopicEndpointManager.getManager().shutdown();
104 * @throws Exception if an error occurs
107 public void setUp() throws Exception {
110 pub = new Publisher<>(PDP_PAP_TOPIC);
112 listener = new MyListener();
113 TopicEndpointManager.getManager().getNoopTopicSink(PDP_PAP_TOPIC).register(listener);
119 * @throws Exception if an error occurs
122 public void tearDown() throws Exception {
123 TopicEndpointManager.getManager().getNoopTopicSink(PDP_PAP_TOPIC).unregister(listener);
129 protected void stopThread() {
136 public void testPublisher_testStop() throws Exception {
140 assertTrue(waitStop());
142 // ensure we can call "stop" a second time
147 public void testPublisher_Ex() {
148 assertThatThrownBy(() -> new Publisher<>("unknwon-topic")).isInstanceOf(PolicyPapException.class);
152 public void testEnqueue() throws Exception {
153 // enqueue before running
154 pub.enqueue(new QueueToken<>(MSG1));
156 // enqueue another after running
158 pub.enqueue(new QueueToken<>(MSG2));
160 String json = listener.await(MAX_WAIT_MS);
161 assertEquals(JSON1, json);
163 json = listener.await(MAX_WAIT_MS);
164 assertEquals(JSON2, json);
168 public void testRun_StopBeforeProcess() throws Exception {
169 // enqueue before running
170 QueueToken<PdpMessage> token = new QueueToken<>(MSG1);
173 // stop before running
176 // start the thread and then wait for it to stop
178 assertTrue(waitStop());
180 // message should not have been processed
181 assertTrue(listener.isEmpty());
182 assertNotNull(token.get());
186 public void testRun() throws Exception {
189 // should skip token with null message
190 QueueToken<PdpMessage> token1 = new QueueToken<>(null);
193 QueueToken<PdpMessage> token2 = new QueueToken<>(MSG2);
196 // only the second message should have been processed
197 String json = listener.await(MAX_WAIT_MS);
198 assertEquals(JSON2, json);
199 assertNull(token2.get());
202 assertTrue(waitStop());
205 assertTrue(listener.isEmpty());
209 public void testGetNext() throws Exception {
212 // wait for a message to be processed
213 pub.enqueue(new QueueToken<>(MSG1));
214 assertNotNull(listener.await(MAX_WAIT_MS));
219 assertTrue(waitStop());
223 * Listener for messages published to the topic.
225 private static class MyListener implements TopicListener {
228 * Released every time a message is added to the queue.
230 private final Semaphore sem = new Semaphore(0);
232 private final ConcurrentLinkedQueue<String> messages = new ConcurrentLinkedQueue<>();
234 public boolean isEmpty() {
235 return messages.isEmpty();
239 * Waits for a message to be published to the topic.
241 * @param waitMs time to wait, in milli-seconds
242 * @return the next message in the queue, or {@code null} if there are no messages
243 * or if the timeout was reached
244 * @throws InterruptedException if this thread was interrupted while waiting
246 public String await(long waitMs) throws InterruptedException {
247 if (sem.tryAcquire(waitMs, TimeUnit.MILLISECONDS)) {
248 return messages.poll();
255 public void onTopicEvent(CommInfrastructure commType, String topic, String event) {