/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.cloudstack.messagebus;
import javax.inject.Inject;
import junit.framework.TestCase;
import org.apache.cloudstack.framework.messagebus.MessageBus;
import org.apache.cloudstack.framework.messagebus.MessageDetector;
import org.apache.cloudstack.framework.messagebus.MessageSubscriber;
import org.apache.cloudstack.framework.messagebus.PublishScope;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:/MessageBusTestContext.xml")
public class TestMessageBus extends TestCase {
@Inject MessageBus _messageBus;
@Test
public void testExactSubjectMatch() {
_messageBus.subscribe("Host", new MessageSubscriber() {
@Override
public void onPublishMessage(String senderAddress, String subject, Object args) {
Assert.assertEquals(subject, "Host");
}
});
_messageBus.publish(null, "Host", PublishScope.LOCAL, null);
_messageBus.publish(null, "VM", PublishScope.LOCAL, null);
_messageBus.clearAll();
}
@Test
public void testRootSubjectMatch() {
_messageBus.subscribe("/", new MessageSubscriber() {
@Override
public void onPublishMessage(String senderAddress, String subject, Object args) {
Assert.assertTrue(subject.equals("Host") || subject.equals("VM"));
}
});
_messageBus.publish(null, "Host", PublishScope.LOCAL, null);
_messageBus.publish(null, "VM", PublishScope.LOCAL, null);
_messageBus.clearAll();
}
@Test
public void testMiscMatch() {
MessageSubscriber subscriberAtParentLevel = new MessageSubscriber() {
@Override
public void onPublishMessage(String senderAddress, String subject, Object args) {
Assert.assertTrue(subject.startsWith(("Host")) || subject.startsWith("VM"));
}
};
MessageSubscriber subscriberAtChildLevel = new MessageSubscriber() {
@Override
public void onPublishMessage(String senderAddress, String subject, Object args) {
Assert.assertTrue(subject.equals("Host.123"));
}
};
subscriberAtParentLevel = Mockito.spy(subscriberAtParentLevel);
subscriberAtChildLevel = Mockito.spy(subscriberAtChildLevel);
_messageBus.subscribe("Host", subscriberAtParentLevel);
_messageBus.subscribe("VM", subscriberAtParentLevel);
_messageBus.subscribe("Host.123", subscriberAtChildLevel);
_messageBus.publish(null, "Host.123", PublishScope.LOCAL, null);
_messageBus.publish(null, "Host.321", PublishScope.LOCAL, null);
_messageBus.publish(null, "VM.123", PublishScope.LOCAL, null);
Mockito.verify(subscriberAtParentLevel).onPublishMessage(null, "Host.123", null);
Mockito.verify(subscriberAtParentLevel).onPublishMessage(null, "Host.321", null);
Mockito.verify(subscriberAtParentLevel).onPublishMessage(null, "VM.123", null);
Mockito.verify(subscriberAtChildLevel).onPublishMessage(null, "Host.123", null);
Mockito.reset(subscriberAtParentLevel);
Mockito.reset(subscriberAtChildLevel);
_messageBus.unsubscribe(null, subscriberAtParentLevel);
_messageBus.publish(null, "Host.123", PublishScope.LOCAL, null);
_messageBus.publish(null, "VM.123", PublishScope.LOCAL, null);
Mockito.verify(subscriberAtChildLevel).onPublishMessage(null, "Host.123", null);
Mockito.verify(subscriberAtParentLevel, Mockito.times(0)).onPublishMessage(null, "Host.123", null);
Mockito.verify(subscriberAtParentLevel, Mockito.times(0)).onPublishMessage(null, "VM.123", null);
_messageBus.clearAll();
}
public void testMessageDetector() {
MessageDetector detector = new MessageDetector();
detector.open(_messageBus, new String[] {"VM", "Host"});
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
for(int i = 0; i < 2; i++) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
}
_messageBus.publish(null, "Host", PublishScope.GLOBAL, null);
}
}
});
thread.start();
try {
int count = 0;
while(count < 2) {
if(detector.waitAny(1000)) {
System.out.println("Detected signal on bus");
count++;
} else {
System.out.println("Waiting timed out");
}
}
} finally {
detector.close();
}
try {
thread.join();
} catch (InterruptedException e) {
}
}
}