Question

我需要在Mule中公开REST Web服务。我在Mule中有以下流程： -

   <flow name="MainService" doc:name="MainService">
        <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8082" doc:name="HTTP"/>
        <logger message="RequestLog :- #[message.payloadAs(java.lang.String)]" level="INFO" doc:name="RequestLogger"/>
         <jms:outbound-endpoint queue="NewQueue" connector-ref="Active_MQ" doc:name="JMS" exchange-pattern="request-response"/>
    </flow>


    <flow name="testFlow1" doc:name="testFlow1" initialState="started">
       <jms:inbound-endpoint connector-ref="Active_MQ" address="jms://tcp:NewQueue" doc:name="JMS" exchange-pattern="request-response" disableTemporaryReplyToDestinations="true" responseTimeout="90000"/>
        <jersey:resources doc:name="REST">
            <component class="com.test.services.schema.maindata.v1.Impl.MainDataImpl"/>
        </jersey:resources>
    </flow>

现在我希望每当从休息客户端触发服务时，请求应首先进入 MainService流程和 testFlow1流程<中的ActiveMQ队列 NewQueue / strong>它将从 NewQueue 获取请求并执行它..

现在这个网络服务有两种方法： -

第一种方法是 insertDataOperation ，它是从中触发的将客户端作为POST方法，它接受JSON请求身体..

第二种方法是 retrieveDataOperation ，它有从休息客户端作为GET方法触发，该方法有请求网址如下： - 价值所在的http://localhost:8082/getData/retrieve/?id=21 id ..

现在，当我触发该值时，我得到以下异常： -

INFO 2014-08-10 20:23:56,622 [[test].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'Active_MQ.dispatcher.2028594834'. Object is: EeJmsMessageDispatcher INFO 2014-08-10 20:23:56,622 [[test].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'Active_MQ.dispatcher.2028594834'. Object is: EeJmsMessageDispatcher ERROR 2014-08-10 20:23:56,709 [ActiveMQ Session Task-1] org.mule.exception.DefaultMessagingExceptionStrategy: ******************************************************************************** Message : Failed to invoke JerseyResourcesComponent{testFlow1.component.1820680768}. Component that caused exception is: JerseyResourcesComponent{testFlow1.component.1820680768}. Message payload is of type: String Code : MULE_ERROR--2 -------------------------------------------------------------------------------- Exception stack is: 1. null (java.lang.NullPointerException) org.mule.module.jersey.JerseyResourcesComponent:116 (null) 2. Failed to invoke JerseyResourcesComponent{testFlow1.component.1820680768}. Component that caused exception is: JerseyResourcesComponent{testFlow1.component.1820680768}. Message payload is of type: String (org.mule.component.ComponentException) org.mule.component.AbstractComponent:144 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html) -------------------------------------------------------------------------------- Root Exception stack trace: java.lang.NullPointerException at org.mule.module.jersey.JerseyResourcesComponent.doInvoke(JerseyResourcesComponent.java:116) at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:122) at org.mule.component.AbstractComponent.access$000(AbstractComponent.java:57) + 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything) ******************************************************************************** ERROR 2014-08-10 20:23:57,746 [ActiveMQ Session Task-2] org.mule.exception.DefaultMessagingExceptionStrategy: ******************************************************************************** Message : "Message with id "ID:ANIRBAN-PC-50216-1407682432183-1:1:6:1:1" has been redelivered 1 times on endpoint "jms://tcp:NewQueue", which exceeds the maxRedelivery setting of 0 on the connector "Active_MQ". Message payload is of type: ActiveMQTextMessage Code : MULE_ERROR--2 -------------------------------------------------------------------------------- Exception stack is: 1. "Message with id "ID:ANIRBAN-PC-50216-1407682432183-1:1:6:1:1" has been redelivered 1 times on endpoint "jms://tcp:NewQueue", which exceeds the maxRedelivery setting of 0 on the connector "Active_MQ". Message payload is of type: ActiveMQTextMessage (org.mule.transport.jms.redelivery.MessageRedeliveredException) org.mule.transport.jms.redelivery.JmsXRedeliveryHandler:81 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/transport/jms/redelivery/MessageRedeliveredException.html) -------------------------------------------------------------------------------- Root Exception stack trace: org.mule.transport.jms.redelivery.MessageRedeliveredException: "Message with id "ID:ANIRBAN-PC-50216-1407682432183-1:1:6:1:1" has been redelivered 1 times on endpoint "jms://tcp:NewQueue", which exceeds the maxRedelivery setting of 0 on the connector "Active_MQ". Message payload is of type: ActiveMQTextMessage at org.mule.transport.jms.redelivery.JmsXRedeliveryHandler.handleRedelivery(JmsXRedeliveryHandler.java:81) at org.mule.transport.jms.MultiConsumerJmsMessageReceiver$JmsWorker.preProcessMessage(MultiConsumerJmsMessageReceiver.java:512) at org.mule.transport.AbstractReceiverWorker$1$1.process(AbstractReceiverWorker.java:117) + 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything) ********************************************************************************

现在我觉得需要插入ActiveMQ队列NewQueue的请求应该是 insertDataOperation 的字符串格式，因为请求是在BODY上...我不确定 retrieveDataOperation ，其在网址中包含值id ...

请让我知道如何解决这两种情况的例外情况......请帮忙

Answer 1

最突出的问题是您只通过JMS端点发送HTTP请求的有效负载，这当然不足以让Jersey感到满意。

您需要将整个Mule消息序列化为XML（因此它的属性也会被转移）......

<xml:object-to-xml-transformer acceptMuleMessage="true" />

...然后通过JMS发送它，然后在Jersey组件之前反序列化它。

TBF我不知道这是否有效，但这可能是最接近工作解决方案的。

Answer 2

根据David的建议，需要添加： -

<mulexml:object-to-xml-transformer acceptMuleMessage="true" doc:name="Object to XML"/>

更新的工作流程： -

<jms:activemq-connector name="Active_MQ" brokerURL="tcp://localhost:61616" validateConnections="true" doc:name="Active MQ"/>

<flow name="MainService" doc:name="MainService">
<http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8082" doc:name="HTTP"/>
<logger message="RequestLog :- #[message.payloadAs(java.lang.String)]" level="INFO" doc:name="RequestLogger"/>
<mulexml:object-to-xml-transformer acceptMuleMessage="true" doc:name="Object to XML"/>
<jms:outbound-endpoint queue="NewQueue" connector-ref="Active_MQ" doc:name="JMS" exchange-pattern="request-response"/>
</flow>

<flow name="testFlow1" doc:name="testFlow1" initialState="started">
 <jms:inbound-endpoint connector-ref="Active_MQ" address="jms://tcp:NewQueue" doc:name="JMS" exchange-pattern="request-response" disableTemporaryReplyToDestinations="true" responseTimeout="90000"/>
 <mulexml:xml-to-object-transformer doc:name="XML to Object"/>
 <jersey:resources doc:name="REST">
   <component class="com.test.services.schema.maindata.v1.Impl.MainDataImpl"/>
 </jersey:resources>
</flow>

如何在Mule中使用ActiveMQ来使用REST Web服务

2 个答案: