我正在开发一个Spring Boot应用程序，我打算在其中使用来自多个队列的JMS消息 - 但是我想控制处理这些消息的执行线程的总数，而不是控制每个执行的线程数。 JMS队列。
简而言之：很多JMS队列。一个线程池来进行处理。
有些队列比其他队列更繁忙（有些队列可能总是有工作，有些则长时间闲置） - 所以我想利用可用的处理能力做任何需要完成的工作，无论源队列。
我使用具有固定池大小的共享DefaultMessageListenerContainer设置了一系列TaskExecutor个。我观察到的行为是，一个队列将占用所有可用的插槽 - 然后（即使第一个队列变空），插槽也不可用于其他队列“{{1}”使用。 / p>
这是在javadocs for DefaultMessageListenerContainer.setTaskExecutor()：
作为此侦听器，普通线程池不会添加太多值 容器在其整个生命周期中将占用许多线程。
DefaultMessageListenerContainer那样可以消耗多个队列的东西吗？答案 0 :(得分：6)
我试图重新创建你的问题，但我不能。可能是因为您在此问题中缺少源代码。但这就是我的尝试。
import java.io.File;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.jms.listener.DefaultMessageListenerContainer;
import org.springframework.jms.listener.adapter.MessageListenerAdapter;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.util.FileSystemUtils;
@Configuration
@EnableAutoConfiguration
public class Application {
public class Receiver {
private String name;
public Receiver(String name) {
this.name = name;
}
/**
* When you receive a message, print it out, then shut down the application.
* Finally, clean up any ActiveMQ server stuff.
*/
public void receiveMessage(String message) {
System.out.println("Received <" + message + "> @ "+name);
//context.close();
FileSystemUtils.deleteRecursively(new File("activemq-data"));
}
}
static String mailboxDestination = "mailbox-destination";
static String mailboxDestination2= "mailbox-destination2";
@Bean
MessageListenerAdapter adapter1() {
MessageListenerAdapter messageListener
= new MessageListenerAdapter(new Receiver("MailBox1"));
messageListener.setDefaultListenerMethod("receiveMessage");
return messageListener;
}
@Bean
MessageListenerAdapter adapter2() {
MessageListenerAdapter messageListener
= new MessageListenerAdapter(new Receiver("MailBox2"));
messageListener.setDefaultListenerMethod("receiveMessage");
return messageListener;
}
@Bean
DefaultMessageListenerContainer container(ConnectionFactory connectionFactory) throws Exception {
DefaultMessageListenerContainer container = new DefaultMessageListenerContainer();
container.setMessageListener(adapter1());
container.setConnectionFactory(connectionFactory);
container.setDestinationName(mailboxDestination);
container.setTaskExecutor(taskExecutor());
return container;
}
@Bean
DefaultMessageListenerContainer container2(ConnectionFactory connectionFactory) throws Exception {
DefaultMessageListenerContainer container = new DefaultMessageListenerContainer();
container.setMessageListener(adapter2());
container.setConnectionFactory(connectionFactory);
container.setDestinationName(mailboxDestination2);
container.setTaskExecutor(taskExecutor());
return container;
}
@Bean
TaskExecutor taskExecutor() throws Exception {
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
taskExecutor.setCorePoolSize(10);
taskExecutor.setMaxPoolSize(100);
taskExecutor.setQueueCapacity(1000);
taskExecutor.setThreadGroupName("MyThreads");
return taskExecutor;
}
public static void main(String[] args) {
// Clean out any ActiveMQ data from a previous run
FileSystemUtils.deleteRecursively(new File("activemq-data"));
// Launch the application
ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
// Send a message
final JmsTemplate jmsTemplate = context.getBean(JmsTemplate.class);
System.out.println("Sending a new message.");
new Thread() {
public void run() {
for(int i=0;i<100;i++) {
final String message = (i+1)+" ping!";
MessageCreator messageCreator = new MessageCreator() {
@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage(message);
}
};
jmsTemplate.send(mailboxDestination, messageCreator);
}
}
}.start();
new Thread() {
public void run() {
for(int i=0;i<100;i++) {
final String message = (i+1)+" ping!";
MessageCreator messageCreator = new MessageCreator() {
@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage(message);
}
};
jmsTemplate.send(mailboxDestination2, messageCreator);
}
}
}.start();
}
}
我得到的输出是;
Received <1 ping!> @ MailBox2
Received <1 ping!> @ MailBox1
Received <2 ping!> @ MailBox2
Received <2 ping!> @ MailBox1
Received <3 ping!> @ MailBox2
Received <3 ping!> @ MailBox1
Received <4 ping!> @ MailBox2
Received <4 ping!> @ MailBox1
Received <5 ping!> @ MailBox2
Received <5 ping!> @ MailBox1
Received <6 ping!> @ MailBox2
Received <6 ping!> @ MailBox1
Received <7 ping!> @ MailBox2
Received <7 ping!> @ MailBox1
Received <8 ping!> @ MailBox2
Received <8 ping!> @ MailBox1
Received <9 ping!> @ MailBox2
Received <9 ping!> @ MailBox1
Received <10 ping!> @ MailBox2
Received <10 ping!> @ MailBox1
Received <11 ping!> @ MailBox2
Received <11 ping!> @ MailBox1
Received <12 ping!> @ MailBox1
Received <12 ping!> @ MailBox2
Received <13 ping!> @ MailBox1
Received <13 ping!> @ MailBox2
Received <14 ping!> @ MailBox1
Received <14 ping!> @ MailBox2
Received <15 ping!> @ MailBox2
Received <15 ping!> @ MailBox1
Received <16 ping!> @ MailBox2
Received <16 ping!> @ MailBox1
Received <17 ping!> @ MailBox2
Received <17 ping!> @ MailBox1
Received <18 ping!> @ MailBox2
Received <18 ping!> @ MailBox1
Received <19 ping!> @ MailBox1
Received <19 ping!> @ MailBox2
Received <20 ping!> @ MailBox1
Received <20 ping!> @ MailBox2
Received <21 ping!> @ MailBox1
Received <21 ping!> @ MailBox2
Received <22 ping!> @ MailBox1
Received <22 ping!> @ MailBox2
Received <23 ping!> @ MailBox1
Received <23 ping!> @ MailBox2
Received <24 ping!> @ MailBox1
Received <24 ping!> @ MailBox2
Received <25 ping!> @ MailBox1
Received <25 ping!> @ MailBox2
Received <26 ping!> @ MailBox1
Received <26 ping!> @ MailBox2
Received <27 ping!> @ MailBox1
Received <27 ping!> @ MailBox2
Received <28 ping!> @ MailBox2
Received <28 ping!> @ MailBox1
Received <29 ping!> @ MailBox2
Received <29 ping!> @ MailBox1
Received <30 ping!> @ MailBox2
Received <30 ping!> @ MailBox1
Received <31 ping!> @ MailBox2
Received <31 ping!> @ MailBox1
Received <32 ping!> @ MailBox2
Received <33 ping!> @ MailBox2
Received <32 ping!> @ MailBox1
Received <34 ping!> @ MailBox2
Received <33 ping!> @ MailBox1
Received <34 ping!> @ MailBox1
Received <35 ping!> @ MailBox2
Received <35 ping!> @ MailBox1
Received <36 ping!> @ MailBox2
Received <36 ping!> @ MailBox1
Received <37 ping!> @ MailBox2
Received <37 ping!> @ MailBox1
Received <38 ping!> @ MailBox2
Received <38 ping!> @ MailBox1
Received <39 ping!> @ MailBox2
Received <39 ping!> @ MailBox1
Received <40 ping!> @ MailBox2
Received <40 ping!> @ MailBox1
Received <41 ping!> @ MailBox2
Received <42 ping!> @ MailBox2
Received <43 ping!> @ MailBox2
Received <44 ping!> @ MailBox2
Received <45 ping!> @ MailBox2
Received <46 ping!> @ MailBox2
Received <47 ping!> @ MailBox2
Received <48 ping!> @ MailBox2
Received <49 ping!> @ MailBox2
Received <50 ping!> @ MailBox2
Received <51 ping!> @ MailBox2
Received <52 ping!> @ MailBox2
Received <53 ping!> @ MailBox2
Received <54 ping!> @ MailBox2
Received <55 ping!> @ MailBox2
Received <56 ping!> @ MailBox2
Received <57 ping!> @ MailBox2
Received <58 ping!> @ MailBox2
Received <59 ping!> @ MailBox2
Received <60 ping!> @ MailBox2
Received <61 ping!> @ MailBox2
Received <62 ping!> @ MailBox2
Received <63 ping!> @ MailBox2
Received <64 ping!> @ MailBox2
Received <65 ping!> @ MailBox2
Received <66 ping!> @ MailBox2
Received <67 ping!> @ MailBox2
Received <68 ping!> @ MailBox2
Received <69 ping!> @ MailBox2
Received <70 ping!> @ MailBox2
Received <71 ping!> @ MailBox2
Received <72 ping!> @ MailBox2
Received <73 ping!> @ MailBox2
Received <74 ping!> @ MailBox2
Received <75 ping!> @ MailBox2
Received <76 ping!> @ MailBox2
Received <77 ping!> @ MailBox2
Received <78 ping!> @ MailBox2
Received <79 ping!> @ MailBox2
Received <80 ping!> @ MailBox2
Received <81 ping!> @ MailBox2
Received <82 ping!> @ MailBox2
Received <83 ping!> @ MailBox2
Received <84 ping!> @ MailBox2
Received <85 ping!> @ MailBox2
Received <86 ping!> @ MailBox2
Received <87 ping!> @ MailBox2
Received <88 ping!> @ MailBox2
Received <89 ping!> @ MailBox2
Received <90 ping!> @ MailBox2
Received <91 ping!> @ MailBox2
Received <92 ping!> @ MailBox2
Received <93 ping!> @ MailBox2
Received <94 ping!> @ MailBox2
Received <95 ping!> @ MailBox2
Received <96 ping!> @ MailBox2
Received <97 ping!> @ MailBox2
Received <98 ping!> @ MailBox2
Received <99 ping!> @ MailBox2
Received <100 ping!> @ MailBox2
Received <41 ping!> @ MailBox1
Received <42 ping!> @ MailBox1
Received <43 ping!> @ MailBox1
Received <44 ping!> @ MailBox1
Received <45 ping!> @ MailBox1
Received <46 ping!> @ MailBox1
Received <47 ping!> @ MailBox1
Received <48 ping!> @ MailBox1
Received <49 ping!> @ MailBox1
Received <50 ping!> @ MailBox1
Received <51 ping!> @ MailBox1
Received <52 ping!> @ MailBox1
Received <53 ping!> @ MailBox1
Received <54 ping!> @ MailBox1
Received <55 ping!> @ MailBox1
Received <56 ping!> @ MailBox1
Received <57 ping!> @ MailBox1
Received <58 ping!> @ MailBox1
Received <59 ping!> @ MailBox1
Received <60 ping!> @ MailBox1
Received <61 ping!> @ MailBox1
Received <62 ping!> @ MailBox1
Received <63 ping!> @ MailBox1
Received <64 ping!> @ MailBox1
Received <65 ping!> @ MailBox1
Received <66 ping!> @ MailBox1
Received <67 ping!> @ MailBox1
Received <68 ping!> @ MailBox1
Received <69 ping!> @ MailBox1
Received <70 ping!> @ MailBox1
Received <71 ping!> @ MailBox1
Received <72 ping!> @ MailBox1
Received <73 ping!> @ MailBox1
Received <74 ping!> @ MailBox1
Received <75 ping!> @ MailBox1
Received <76 ping!> @ MailBox1
Received <77 ping!> @ MailBox1
Received <78 ping!> @ MailBox1
Received <79 ping!> @ MailBox1
Received <80 ping!> @ MailBox1
Received <81 ping!> @ MailBox1
Received <82 ping!> @ MailBox1
Received <83 ping!> @ MailBox1
Received <84 ping!> @ MailBox1
Received <85 ping!> @ MailBox1
Received <86 ping!> @ MailBox1
Received <87 ping!> @ MailBox1
Received <88 ping!> @ MailBox1
Received <89 ping!> @ MailBox1
Received <90 ping!> @ MailBox1
Received <91 ping!> @ MailBox1
Received <92 ping!> @ MailBox1
Received <93 ping!> @ MailBox1
Received <94 ping!> @ MailBox1
Received <95 ping!> @ MailBox1
Received <96 ping!> @ MailBox1
Received <97 ping!> @ MailBox1
Received <98 ping!> @ MailBox1
Received <99 ping!> @ MailBox1
Received <100 ping!> @ MailBox1
如果我错了，请纠正我但使用此配置我不会发现任何问题。两个队列和一个任务执行者。