在尝试从Spring队列sendAndReceivePerson()中读取Person对象时，如何阻止JmsTemplate ActiveMQ单元测试person.queue阻止？
测试创建一个Person对象，将其发送到队列person.queue（这也应该创建包含队列的嵌入式代理），然后尝试从同一队列中读取对象。 / p>
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {MessagingConfiguration.class})
public class PersonMessengerTest {
@Autowired
private PersonMessenger personMessenger;
@Test
public void sendAndReceivePerson() {
final Person person = new Person();
final UUID id = UUID.randomUUID();
person.setId(id);
person.setFirstName("Derek");
person.setLastName("Mahar");
personMessenger.sendPersion(person);
final Person receivedPersion = personMessenger.receivePersion();
assertEquals(id, receivedPersion.getId());
}
}
public class PersonMessenger {
private final JmsOperations jmsOperations;
public PersonMessenger(JmsOperations jmsOperations) {
this.jmsOperations = jmsOperations;
}
public void sendPersion(final Person person) {
this.jmsOperations.convertAndSend(person);
}
public Person receivePersion() {
return (Person) this.jmsOperations.receiveAndConvert();
}
}
@Configuration
@Import({CommonConfiguration.class})
public class MessagingConfiguration {
public static final String PERSON_QUEUE = "person.queue";
@Autowired
private ApplicationEnvironment applicationEnvironment;
@Bean
public ConnectionFactory jmsConnectionFactory() {
final ActiveMQConnectionFactory activeMqConnectionFactory = new ActiveMQConnectionFactory(
this.applicationEnvironment.getJmsBrokerUrl());
activeMqConnectionFactory.setTrustAllPackages(true);
return activeMqConnectionFactory;
}
@Bean
public JmsOperations jmsTemplate(ConnectionFactory connectionFactory) {
final JmsTemplate jmsTemplate = new JmsTemplate(connectionFactory);
jmsTemplate.setDefaultDestinationName(PERSON_QUEUE);
return jmsTemplate;
}
@Bean
public PersonMessenger personMessenger(JmsOperations jmsOperations) {
return new PersonMessenger(jmsOperations);
}
@Bean(name = PERSON_QUEUE)
public Queue personQueue() {
return new ActiveMQQueue(PERSON_QUEUE);
}
}
@Configuration
@PropertySource("classpath:application.properties")
public class CommonConfiguration {
@Autowired
private Environment applicationEnvironment;
@Bean
public ApplicationEnvironment applicationEnvironment() {
return new ApplicationEnvironment(this.applicationEnvironment);
}
}
application.properties：
jms.brokerUrl=vm://test?async=false&broker.persistent=false&broker.useJmx=false
请注意，尝试从队列中读取Person对象时测试阻止：
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T E S T S
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Running com.opessoftware.example.spring.messenger.PersonMessengerTest
2017-02-15 15:30:33,736|WARN|main|o.a.activemq.broker.BrokerService|49670|
org.apache.activemq.broker.BrokerService.checkMemorySystemUsageLimits(BrokerService.java:2142)
Memory Usage for the Broker (1024mb) is more than the maximum available for the JVM: 955 mb - resetting to 70% of maximum available: 668 mb
2017-02-15 15:30:33,993|WARN|main|o.a.activemq.broker.BrokerService|49927|
org.apache.activemq.broker.BrokerService.checkMemorySystemUsageLimits(BrokerService.java:2142)
Memory Usage for the Broker (1024mb) is more than the maximum available for the JVM: 955 mb - resetting to 70% of maximum available: 668 mb
receiveAndConvert()调用可能会创建第二个嵌入式代理，还是可能是从另一个队列中读取？
答案 0 :(得分：2)
使用嵌入式代理进行测试时出现的臭名昭着的问题。
连接在操作之间关闭，没有持久性，数据就会丢失。
尝试在CachingConnectionFactory中包装连接工厂，以便连接保持打开状态（因此代理保持运行状态）。
出于性能原因，你应该真的使用CachingConnectionFactory和JmsTemplate，但在单元测试中它会特别糟糕。
答案 1 :(得分：1)
作为Gary Russell suggested，为了防止每个JMS操作关闭连接并丢弃嵌入式代理以及队列中的Person消息，方法jmsConnectionFactory()在配置类MessagingConfiguration中现在将ActiveMQConnectionFactory（实现ConnectionFactory）包装在CachingConnectionFactory中：
@Configuration
@Import({CommonConfiguration.class})
@EnableJms
public class MessagingConfiguration {
public static final String PERSON_QUEUE = "person.queue";
@Autowired
private ApplicationEnvironment applicationEnvironment;
@Bean
public ConnectionFactory jmsConnectionFactory() {
final ActiveMQConnectionFactory activeMqConnectionFactory = new ActiveMQConnectionFactory(
this.applicationEnvironment.getJmsBrokerUrl());
activeMqConnectionFactory.setTrustAllPackages(true);
return new CachingConnectionFactory(activeMqConnectionFactory);
}
@Bean
public JmsOperations jmsTemplate(ConnectionFactory connectionFactory) {
final JmsTemplate jmsTemplate = new JmsTemplate(connectionFactory);
jmsTemplate.setDefaultDestinationName(PERSON_QUEUE);
return jmsTemplate;
}
@Bean
public PersonMessenger personMessenger(JmsOperations jmsOperations) {
return new PersonMessenger(jmsOperations);
}
@Bean(name = PERSON_QUEUE)
public Queue personQueue() {
return new ActiveMQQueue(PERSON_QUEUE);
}
}
请注意，测试仅传递并输出单个BrokerService内存警告，这意味着测试只会创建一个所有JMS操作都使用的嵌入式代理。
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Building spring-hibernate-jpa 1.0.0-SNAPSHOT
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--- maven-surefire-plugin:2.10:test (default-cli) @ spring-hibernate-jpa ---
Surefire report directory: /home/derek/Projects/spring-hibernate-jpa/target/surefire-reports
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T E S T S
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Running com.opessoftware.example.spring.messenger.PersonMessengerTest
2017-02-16 10:14:03,743|WARN|main|o.a.activemq.broker.BrokerService|1579|
org.apache.activemq.broker.BrokerService.checkMemorySystemUsageLimits(BrokerService.java:2142)
Memory Usage for the Broker (1024mb) is more than the maximum available for the JVM: 955 mb - resetting to 70% of maximum available: 668 mb
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.929 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
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BUILD SUCCESS
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Total time: 4.190s
Finished at: Thu Feb 16 10:14:04 EST 2017
Final Memory: 8M/60M
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