/*
* Copyright 2002-2016 the original author or authors.
*
* 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.
*/
package org.springframework.integration.core;
import static org.junit.Assert.assertNull;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.verify;
import java.lang.reflect.Field;
import java.util.UUID;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Ignore;
import org.junit.Test;
import org.mockito.Mockito;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.support.GenericMessage;
import org.springframework.util.IdGenerator;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.StopWatch;
/**
* @author Oleg Zhurakousky
* @author Gunnar Hillert
* @author Gary Russell
*/
public class MessageIdGenerationTests {
private final Log logger = LogFactory.getLog(getClass());
@Test
public void testCustomIdGenerationWithParentRegistrar() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context-withGenerator.xml", this.getClass());
ClassPathXmlApplicationContext child = new ClassPathXmlApplicationContext(new String[]{"MessageIdGenerationTests-context.xml"}, this.getClass(), parent);
IdGenerator idGenerator = child.getBean("idGenerator", IdGenerator.class);
MessageChannel inputChannel = child.getBean("input", MessageChannel.class);
inputChannel.send(new GenericMessage<Integer>(0));
verify(idGenerator, atLeastOnce()).generateId();
child.close();
parent.close();
this.assertDestroy();
}
@Test
public void testCustomIdGenerationWithParentChildIndependentCreation() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context-withGenerator.xml", this.getClass());
GenericXmlApplicationContext child = new GenericXmlApplicationContext();
child.load("classpath:/org/springframework/integration/core/MessageIdGenerationTests-context.xml");
child.setParent(parent);
child.refresh();
IdGenerator idGenerator = child.getBean("idGenerator", IdGenerator.class);
MessageChannel inputChannel = child.getBean("input", MessageChannel.class);
inputChannel.send(new GenericMessage<Integer>(0));
verify(idGenerator, atLeastOnce()).generateId();
child.close();
parent.close();
this.assertDestroy();
}
@Test
public void testCustomIdGenerationWithParentRegistrarClosed() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context-withGenerator.xml", this.getClass());
ClassPathXmlApplicationContext child = new ClassPathXmlApplicationContext(new String[]{"MessageIdGenerationTests-context.xml"}, this.getClass(), parent);
IdGenerator idGenerator = child.getBean("idGenerator", IdGenerator.class);
MessageChannel inputChannel = child.getBean("input", MessageChannel.class);
inputChannel.send(new GenericMessage<Integer>(0));
verify(idGenerator, atLeastOnce()).generateId();
parent.close();
child.close();
this.assertDestroy();
}
@Test
public void testCustomIdGenerationWithChildRegistrar() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context.xml", this.getClass());
ClassPathXmlApplicationContext child = new ClassPathXmlApplicationContext(new String[]{"MessageIdGenerationTests-context-withGenerator.xml"}, this.getClass(), parent);
IdGenerator idGenerator = child.getBean("idGenerator", IdGenerator.class);
Mockito.reset(idGenerator);
MessageChannel inputChannel = child.getBean("input", MessageChannel.class);
inputChannel.send(new GenericMessage<Integer>(0));
verify(idGenerator, atLeastOnce()).generateId();
child.close();
parent.close();
this.assertDestroy();
}
@Test
public void testCustomIdGenerationWithChildRegistrarClosed() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context.xml", this.getClass());
ClassPathXmlApplicationContext child = new ClassPathXmlApplicationContext(new String[]{"MessageIdGenerationTests-context-withGenerator.xml"}, this.getClass(), parent);
IdGenerator idGenerator = child.getBean("idGenerator", IdGenerator.class);
Mockito.reset(idGenerator);
MessageChannel inputChannel = child.getBean("input", MessageChannel.class);
inputChannel.send(new GenericMessage<Integer>(0));
verify(idGenerator, atLeastOnce()).generateId();
child.close();
parent.close();
this.assertDestroy();
}
// similar to the last test, but should not fail because child AC is closed before second child AC is started
@Test
public void testCustomIdGenerationWithParentChildIndependentCreationChildrenRegistrarsOneAtTheTime() throws Exception {
ClassPathXmlApplicationContext parent = new ClassPathXmlApplicationContext("MessageIdGenerationTests-context.xml", this.getClass());
GenericXmlApplicationContext childA = new GenericXmlApplicationContext();
childA.load("classpath:/org/springframework/integration/core/MessageIdGenerationTests-context-withGenerator.xml");
childA.setParent(parent);
childA.refresh();
childA.close();
GenericXmlApplicationContext childB = new GenericXmlApplicationContext();
childB.load("classpath:/org/springframework/integration/core/MessageIdGenerationTests-context-withGenerator.xml");
childB.setParent(parent);
childB.refresh();
parent.close();
childB.close();
this.assertDestroy();
}
@Test
@Ignore
public void performanceTest() {
int times = 1000000;
StopWatch watch = new StopWatch();
watch.start();
for (int i = 0; i < times; i++) {
new GenericMessage<Integer>(0);
}
watch.stop();
double defaultGeneratorElapsedTime = watch.getTotalTimeSeconds();
Field idGeneratorField = ReflectionUtils.findField(MessageHeaders.class, "idGenerator");
ReflectionUtils.makeAccessible(idGeneratorField);
ReflectionUtils.setField(idGeneratorField, null, (IdGenerator) () -> TimeBasedUUIDGenerator.generateId());
watch = new StopWatch();
watch.start();
for (int i = 0; i < times; i++) {
new GenericMessage<Integer>(0);
}
watch.stop();
double timebasedGeneratorElapsedTime = watch.getTotalTimeSeconds();
logger.info("Generated " + times + " messages using default UUID generator " +
"in " + defaultGeneratorElapsedTime + " seconds");
logger.info("Generated " + times + " messages using Timebased UUID generator " +
"in " + timebasedGeneratorElapsedTime + " seconds");
logger.info("Time-based ID generator is " + defaultGeneratorElapsedTime / timebasedGeneratorElapsedTime + " times faster");
}
private void assertDestroy() throws Exception {
Field idGenField = ReflectionUtils.findField(MessageHeaders.class, "idGenerator");
ReflectionUtils.makeAccessible(idGenField);
assertNull("the idGenerator field has not been properly reset to null", idGenField.get(null));
}
public static class SampleIdGenerator implements IdGenerator {
@Override
public UUID generateId() {
return UUID.nameUUIDFromBytes(((System.currentTimeMillis() - System.nanoTime()) + "").getBytes());
}
}
}