Question

Spring文档说当你使用@EnableWebSocketMessageBroker注释时，会创建一个类型为WebSocketMessageBrokerStats的bean。这个bean可以通过Spring的MBeanExporter导出到JMX，以便在运行时查看，例如通过JDK的jconsole（或VisualVM）。我不知道如何创建Mbean。

http://docs.spring.io/spring/docs/current/spring-framework-reference/html/websocket.html#websocket-stomp-stats

我发现@EnableMBeanExport相当于使用<context:mbean-export>

在另一个stackoverflow链接中，我发现我需要做一些与下一个相似的事情：

@Configuration
@EnableMBeanExport

    public class SpringConfiguration {
       @Bean
       protected CountingHttpInterceptor countingHttpInterceptor() {
          return new CountingHttpInterceptor();
       }
    }

Exporting Spring @Bean objects using JMX

然后我认为我需要声明一个bean作为下一个：

@Configuration
@EnableMBeanExport
public class SpringConfiguration {

       @Bean
       protected WebSocketMessageBrokerStats webSocketMessageBrokerStats() {
           return new WebSocketMessageBrokerStats();
       }
 }

但这不起作用。

我发现我也需要在JVM中启用JMX。我正在使用WildFly 9.0作为webapplication服务器。我需要启用JMX到WebSocketMessageBrokerStats可以工作吗？

实际上我使用Spring Framework 4.3.2在Websocket实现上有一个STOMP。 Websocket WebSocketMessageBrokerStats在控制台中每30分钟显示一次stats bean显示信息。

我使用此Object找到一些代码的独特位置是Websocket Chat，但我不明白在示例中如何使用它。

https://github.com/salmar/spring-websocket-chat

感谢。

Answer 1

我解决了这个问题。

由于这是使用Spring Framework的问题，我使用了提供此框架的注释。

创建一个类，我们需要注入WebSocketMessageBrokerStats注释创建的@EnableWebSocketMessageBroker bean来监视websockets连接。我们需要使用@ManagedResource注释此类。

代码：

package mx.config.ws;
@ManagedResource(objectName = "Examples:type=JMX,name=Resource")                
public class WebSocketStatsJmxImpl implements WebSocketStatsJmx {


    public WebSocketStatsJmxImpl() {
        super();
        System.out.println("WebSocketStatsJmxImpl::Constructor");
    }



    WebSocketMessageBrokerStats webSocketMessageBrokerStats;

    public WebSocketMessageBrokerStats getWebSocketMessageBrokerStats() {
        return webSocketMessageBrokerStats;
    }
    @Autowired
    public void setWebSocketMessageBrokerStats(WebSocketMessageBrokerStats webSocketMessageBrokerStats) {
        this.webSocketMessageBrokerStats = webSocketMessageBrokerStats; 
    }



    @ManagedAttribute(description="Get stats about WebSocket sessions.")                            // defines an attribute of an MBean
    public String getWebSocketSessionStatsInfo(){
        return webSocketMessageBrokerStats.getWebSocketSessionStatsInfo();
    }
    @ManagedAttribute(description="Get stats about STOMP-related WebSocket message processing.")
    public String getStompSubProtocolStatsInfo(){
        return webSocketMessageBrokerStats.getStompSubProtocolStatsInfo();
    }
    @ManagedAttribute(description="Get stats about STOMP broker relay (when using a full-featured STOMP broker).")
    public String getStompBrokerRelayStatsInfo(){
        return webSocketMessageBrokerStats.getStompBrokerRelayStatsInfo();
    }
    @ManagedAttribute(description="Get stats about the executor processing incoming messages from WebSocket clients.")
    public String getClientInboundExecutorStatsInfo(){
        return webSocketMessageBrokerStats.getClientInboundExecutorStatsInfo();
    }
    @ManagedAttribute(description="Get stats about the executor processing outgoing messages to WebSocket clients.")
    public String getClientOutboundExecutorStatsInfo(){
        return webSocketMessageBrokerStats.getClientOutboundExecutorStatsInfo();
    }
    @ManagedAttribute(description="Get stats about the SockJS task scheduler.")
    public String getSockJsTaskSchedulerStatsInfo(){
        return webSocketMessageBrokerStats.getSockJsTaskSchedulerStatsInfo();
    }
}

创建一个@Configuration，我们将在其中创建一个Spring Bean，我们将实例化WebSocketStatsJmxImpl类。我们必须记住添加 @EnableMBeanExport在某些地方向JMX代理注册所有使用@ManagedResource注释的组件。当我们部署应用程序时，将自动加载所有配置，因为我们将@EnableMBeanExport声明为一个@Configuration，然后@EnableMBeanExport类将是MBeans。

全部：）

@Configuration
@EnableMBeanExport
public class WebSocketStatsJMXBeans {
    @Bean
    public WebSocketStatsJmxImpl jmxWebSocketStatsJmxImpl() {
        return new WebSocketStatsJmxImpl();
    }
}

在我的情况下，我使用Eclipse + Wilfly pluging + Wildfly 9.0。

打开Java VisualVM并查找＆＃34; org.jboss.modules.main＆＃34;，转到MBeans选项卡，然后查看示例Mbean。

多数民众赞成。这项工作。

Answer 2

在Spring 5和Spring Boot 2中，可以使其更简单。

pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>

要导出的Java JMX类：

@Component
@ManagedResource(objectName = "Examples:type=JMX,name=Resource")                
public class YourClassToExport {

    private WebSocketMessageBrokerStats webSocketMessageBrokerStats;

    public WebSocketMessageBrokerStats getWebSocketMessageBrokerStats() {
        return webSocketMessageBrokerStats;
    }

    @Autowired
    public void setWebSocketMessageBrokerStats(WebSocketMessageBrokerStats webSocketMessageBrokerStats) {
        this.webSocketMessageBrokerStats = webSocketMessageBrokerStats; 
    }

    // attributes of an MBean

    @ManagedAttribute(description="Get stats about WebSocket sessions.")                            
    public String getWebSocketSessionStatsInfo(){
        return webSocketMessageBrokerStats.getWebSocketSessionStatsInfo();
    }

    @ManagedAttribute(description="Get stats about STOMP-related WebSocket message processing.")
    public String getStompSubProtocolStatsInfo(){
        return webSocketMessageBrokerStats.getStompSubProtocolStatsInfo();
    }

    @ManagedAttribute(description="Get stats about STOMP broker relay (when using a full-featured STOMP broker).")
    public String getStompBrokerRelayStatsInfo(){
        return webSocketMessageBrokerStats.getStompBrokerRelayStatsInfo();
    }

    @ManagedAttribute(description="Get stats about the executor processing incoming messages from WebSocket clients.")
    public String getClientInboundExecutorStatsInfo(){
        return webSocketMessageBrokerStats.getClientInboundExecutorStatsInfo();
    }

    @ManagedAttribute(description="Get stats about the executor processing outgoing messages to WebSocket clients.")
    public String getClientOutboundExecutorStatsInfo(){
        return webSocketMessageBrokerStats.getClientOutboundExecutorStatsInfo();
    }

    @ManagedAttribute(description="Get stats about the SockJS task scheduler.")
    public String getSockJsTaskSchedulerStatsInfo(){
        return webSocketMessageBrokerStats.getSockJsTaskSchedulerStatsInfo();
    }

}

如何使用MBeanExporter

2 个答案: