Spring 与 jmxtrans-agent 集成以监控 bean

Spring integration with jmxtrans-agent to monitor bean

我正在使用 Spring 集成,但想使用 jmxtrans-agent 来监控我的分离器。就像下面的简单示例一样,我尝试计算到达拆分器的请求数。

@ManagedResource
public class Splitter {
    private final AtomicInteger count = new AtomicInteger();

    @ManagedAttribute
    public int getCount(){
        return this.count.get();
    }

    public List<JsonNode> split(Message<ArrayNode> message) {
        count.incrementAndGet();
        ...
    }
}

// spring integration workflow
<int:gateway id="myGateway" service-interface="someGateway" default-request-channel="splitChannel" error-channel="errorChannel"  default-reply-channel="replyChannel" async-executor="MyThreadPoolTaskExecutor"/>

<int:splitter id="mySplitter" input-channel="splitChannel" output-channel="transformChannel" method="split">
    <bean class="Splitter" />
</int:splitter>

// in MBeanExporter, I added
<entry key="myApplication:type=Splitter,name=splitter" value-ref="mySplitter" />

// query
<query
    objectName='myApplication:type=Splitter,name=splitter'
    attribute='Count'
    resultAlias='myApplication.Splitter.count'/>
<collectIntervalInSeconds>20</collectIntervalInSeconds>

我无法查询数据,出现此错误。

javax.management.AttributeNotFoundException: getAttribute failed: ModelMBeanAttributeInfo not found for number
    at javax.management.modelmbean.RequiredModelMBean.getAttribute(RequiredModelMBean.java:1524)
    at org.springframework.jmx.export.SpringModelMBean.getAttribute(SpringModelMBean.java:109)

哦!抱歉错过了。现在我看到了你的代码:

<int:splitter id="mySplitter" input-channel="splitChannel" output-channel="transformChannel" method="split">
    <bean class="Splitter" />
</int:splitter>

因此,<bean class="Splitter" /> 是内部 bean,对于任何其他环境都是不可见的。

要使其正常工作,您应该将该 bean 定义移动到顶层并从 <splitter>:

中引用它
<bean id="mySplitter" class="Splitter" />

<int:splitter id="mySplitter" input-channel="splitChannel" output-channel="transformChannel" ref="mySplitter" method="split"/>

您使用 <splitter> 组件进行 JMX 导出,它实际上不公开内部 bean,仅公开其自己管理的 attributes/operations。