Question

我正在编写下面的代码来覆盖线程池。但它不能正常工作。在spring boot app startup中设置覆盖线程池的正确方法是什么。请注意，我的代码中没有通过 Server 实例的控件，因此实例化服务器不是我需要的解决方案。

        @Bean
        public EmbeddedServletContainerCustomizer getContainerCustomizer() {
            return (configurableEmbeddedServletContainer) -> {
                if (configurableEmbeddedServletContainer instanceof JettyEmbeddedServletContainerFactory) {
                    ((JettyEmbeddedServletContainerFactory)configurableEmbeddedServletContainer).addServerCustomizers((server) -> {
                        QueuedThreadPool newPool = new QueuedThreadPool(10);
                        QueuedThreadPool oldPool = server.getBean(QueuedThreadPool.class);
                        server.updateBean(oldPool, newPool);        
                    });
                }
            };
        }

当我执行代码时，它丢失了以下错误线程“main”中的异常

java.util.concurrent.RejectedExecutionException: org.eclipse.jetty.io.ManagedSelector@1ee0005 id=0 keys=0 selected=0
    at org.eclipse.jetty.util.thread.QueuedThreadPool.execute(QueuedThreadPool.java:377)
    at org.eclipse.jetty.io.SelectorManager.execute(SelectorManager.java:125)
    at org.eclipse.jetty.io.SelectorManager.doStart(SelectorManager.java:255)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:106)
    at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:260)
    at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:81)
    at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:244)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.server.Server.doStart(Server.java:384)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)

我也尝试使用示例主代码，并且它也给出了相同的错误。

public class FileServer
{
    public static void main(String[] args) throws Exception
    {
         Server server = new Server(9090);

        QueuedThreadPool newPool = new QueuedThreadPool(10);
        QueuedThreadPool oldPool = server.getBean(QueuedThreadPool.class);
        server.updateBean(oldPool, newPool);


        ResourceHandler resource_handler = new ResourceHandler();

        resource_handler.setDirectoriesListed(true);
        resource_handler.setWelcomeFiles(new String[]{ "index.html" });
        resource_handler.setResourceBase(".");

         HandlerList handlers = new HandlerList();
        handlers.setHandlers(new Handler[] { resource_handler, new DefaultHandler() });
        server.setHandler(handlers);

         server.start();
        server.join();
    }
}

Answer 1

以下是在Jetty中使用属性和不同类型的线程池配置线程池的示例。我的案例中的线程池是InstrumentedQueuedThreadPool。

@Configuration
public class CustomJettyConfiguration {

    @Bean
    public JettyEmbeddedServletContainerFactory jettyEmbeddedServletContainerFactory(
            @Value("${server.port:8080}") final String port,
            @Value("${jetty.threadPool.maxThreads:600}") final String maxThreads,
            @Value("${jetty.threadPool.minThreads:10}") final String minThreads,
            @Value("${jetty.threadPool.idleTimeout:5000}") final String idleTimeout) {
        final JettyEmbeddedServletContainerFactory factory =
                new JettyEmbeddedServletContainerFactory(Integer.valueOf(port));

        // Tweak the connection pool used by Jetty to handle incoming HTTP connections
        InstrumentedQueuedThreadPool instThreadPool =
                new InstrumentedQueuedThreadPool(registry);
        instThreadPool.setPrefix("jetty");
        instThreadPool.setMaxThreads(Integer.valueOf(maxThreads));
        instThreadPool.setMinThreads(Integer.valueOf(minThreads));
        instThreadPool.setIdleTimeout(Integer.valueOf(idleTimeout));
        factory.setThreadPool(instThreadPool);

        ...
        return factory;
    }
}

Answer 2

在春季靴子2.x中，public Bus createBus(List<String> passengers) { return passengers.stream() .map(name -> new Person(name)) .collect(Collectors.toList()) .map(personList -> new Bus(personList)) }已由JettyEmbeddedServletContainerFactory取代。

如何在Spring Boot应用程序中覆盖线程池

2 个答案: