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/*
* ============LICENSE_START=======================================================
* ONAP PAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2021, 2023 Nordix Foundation.
* ================================================================================
* 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.pap.main.comm;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.junit.jupiter.api.Test;
import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
import org.onap.policy.models.pdp.concepts.PdpResponseDetails;
import org.onap.policy.models.pdp.concepts.PdpStatus;
class MultiPdpStatusListenerTest {
private static final CommInfrastructure INFRA = CommInfrastructure.NOOP;
private static final String TOPIC = "my-topic";
private static final String ID1 = "request-1";
private static final String ID2 = "request-2";
private static final List<String> ID_LIST = Arrays.asList(ID1, ID2);
private MultiPdpStatusListener listener;
private PdpStatus status;
@Test
void testMultiPdpStatusListenerString() throws Exception {
listener = new MyListener(ID1);
assertEquals(List.of(ID1).toString(), listener.getUnseenIds().toString());
// an ID is in the queue - not done yet
assertFalse(doWait(0));
}
@Test
void testMultiPdpStatusListenerCollectionOfString() throws Exception {
List<String> lst = ID_LIST;
listener = new MyListener(lst);
assertEquals(lst.toString(), listener.getUnseenIds().toString());
// an ID is in the queue - not done yet
assertFalse(doWait(0));
/*
* Try with an empty list - should already be complete.
*/
listener = new MyListener(new LinkedList<>());
assertTrue(listener.getUnseenIds().isEmpty());
assertTrue(doWait(0));
}
@Test
void testGetUnseenIds() {
List<String> lst = ID_LIST;
listener = new MyListener(lst);
assertEquals(lst.toString(), listener.getUnseenIds().toString());
// receive message from one PDP
status = new PdpStatus();
status.setResponse(makeResponse(ID2));
listener.onTopicEvent(INFRA, TOPIC, status);
assertEquals(List.of(ID1).toString(), listener.getUnseenIds().toString());
// receive message from the other PDP
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
assertTrue(listener.getUnseenIds().isEmpty());
}
@Test
void testAwait() throws Exception {
// try with an empty list - should already be complete
listener = new MyListener(new LinkedList<>());
assertTrue(doWait(0));
// try it with something in the list
listener = new MyListener(ID_LIST);
assertFalse(doWait(0));
// process a message from one PDP - wait should block the entire time
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
long tbeg = System.currentTimeMillis();
assertFalse(doWait(50));
assertTrue(System.currentTimeMillis() - tbeg >= 49);
// process a message from the other PDP - wait should NOT block
status = new PdpStatus();
status.setResponse(makeResponse(ID2));
listener.onTopicEvent(INFRA, TOPIC, status);
tbeg = System.currentTimeMillis();
assertTrue(doWait(4000));
assertTrue(System.currentTimeMillis() - tbeg < 3000);
}
@Test
void testOnTopicEvent() throws Exception {
listener = new MyListener(ID_LIST);
// not done yet
assertFalse(doWait(0));
// process a message - still not done as have another ID to go
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
assertFalse(doWait(0));
// process a message from the same PDP - still not done
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
assertFalse(doWait(0));
// process another message - now we're done
status = new PdpStatus();
status.setResponse(makeResponse(ID2));
listener.onTopicEvent(INFRA, TOPIC, status);
assertTrue(doWait(0));
// handleEvent throws an exception - doWait does not return true
listener = new MyListener(ID1) {
@Override
protected String handleEvent(CommInfrastructure infra, String topic, PdpStatus message) {
throw new RuntimeException("expected exception");
}
};
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
assertFalse(doWait(0));
// handleEvent returns null - doWait does not return true
listener = new MyListener(ID1) {
@Override
protected String handleEvent(CommInfrastructure infra, String topic, PdpStatus message) {
return null;
}
};
status = new PdpStatus();
status.setResponse(makeResponse(ID1));
listener.onTopicEvent(INFRA, TOPIC, status);
assertFalse(doWait(0));
}
/**
* Waits for the listener to complete. Spawns a background thread to do the waiting so
* we can limit how long we wait.
*
* @param millisec milliseconds to wait
* @return {@code true} if the wait completed successfully, {@code false} otherwise
* @throws InterruptedException if this thread is interrupted while waiting for the
* background thread to complete
*/
private boolean doWait(long millisec) throws InterruptedException {
AtomicBoolean done = new AtomicBoolean(false);
Thread thread = new Thread() {
@Override
public void run() {
try {
done.set(listener.await(millisec, TimeUnit.MILLISECONDS));
} catch (InterruptedException expected) {
return;
}
}
};
thread.start();
thread.join(5000);
thread.interrupt();
return done.get();
}
/**
* Makes a response for the given request ID.
*
* @param id ID of the request
* @return a new response
*/
private PdpResponseDetails makeResponse(String id) {
PdpResponseDetails resp = new PdpResponseDetails();
resp.setResponseTo(id);
return resp;
}
private static class MyListener extends MultiPdpStatusListener {
public MyListener(String id) {
super(id);
}
public MyListener(List<String> lst) {
super(lst);
}
@Override
protected String handleEvent(CommInfrastructure infra, String topic, PdpStatus message) {
return (message.getResponse().getResponseTo());
}
}
}
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