注册camel的ftp jpa Idempotent存储库时出错

Question

我正在尝试实现jpa幂等存储库，就像这里描述的http://camel.apache.org/file2.html一样，但我得到了一个Mbean导出错误。

在我的application-context.xml上，我有以下部分。

<bean id="mvStore" class="org.apache.camel.processor.idempotent.jpa.JpaMessageIdRepository" lazy-init="false">
        <!-- Here we refer to the spring jpaTemplate -->
        <constructor-arg index="0" ref="jpaTemplate" />
        <!-- This 2nd parameter is the name (= a cateogry name). You can have different repositories with different names -->
        <constructor-arg index="1" value="FileConsumer" />
    </bean>
<context:mbean-server id="mbeanServer" />
<context:mbean-export server="mbeanServer" registration="replaceExisting" default-domain="br.com.touchtec"/>

如果我删除上面的部分，那么服务器(tomcat)就可以正常启动。有人能帮我解决这个问题吗？

下面是堆栈：

Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.apache.camel.processor.idempotent.jpa.JpaMessageIdRepository@6df960c4] with key 'mvStore'; nested exception is javax.management.MalformedObjectNameException: Key properties cannot be empty
    at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:602)
    at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:527)
    at org.springframework.jmx.export.MBeanExporter.afterPropertiesSet(MBeanExporter.java:413)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)
    ... 50 more

Caused by: javax.management.MalformedObjectNameException: Key properties cannot be empty
    at javax.management.ObjectName.construct(ObjectName.java:467)
    at javax.management.ObjectName.<init>(ObjectName.java:1403)
    at javax.management.ObjectName.getInstance(ObjectName.java:1285)
    at org.springframework.jmx.support.ObjectNameManager.getInstance(ObjectNameManager.java:62)
    at org.springframework.jmx.export.naming.MetadataNamingStrategy.getObjectName(MetadataNamingStrategy.java:114)
    at org.springframework.jmx.export.MBeanExporter.getObjectName(MBeanExporter.java:728)
    at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:631)
    at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:592)
    ... 54 more

Answer 1

首先，我希望您清楚，jmx部分不是使Idempotent Repository正常工作所必需的。您的错误是一个纯粹的JMX/Spring错误，没有链接到Camel。

如果您想使用MBeanExporter，您应该阅读Spring JMX上的官方文档，以便更好地理解这一问题。

您的MBeanExporter定义可能如下所示

<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter">
    <property name="beans">
      <map>
        <entry key="bean:name=mvStore" value-ref="mvStore"/>
      </map>
    </property>
    <property name="server" ref="mbeanServer"/>
  </bean>