what is wrong with Jersey class in below Mule flow?
在下面的 mule 流程中，我为带有 VM 端点的 REST Web 服务实现了 Jersey 类。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | <flow name="APIKeyLoadFlow" doc:name="APIKeyLoadFlow" initialState="started"> <http:inbound-endpoint exchange-pattern="request-response" address="${api.load.invoke.url}" doc:name="HTTP" responseTimeout="${apikey.http.responsetimeout}" /> <logger message="Start Of APIKeyLoadFlow -#[payload]" level="INFO" doc:name="ENTRY_LOG" /> <request-reply timeout="300000"> <vm:outbound-endpoint connector-ref="VM_Connector" exchange-pattern="one-way" path="APIKeyLoadRequest"> </vm:outbound-endpoint> <vm:inbound-endpoint connector-ref="VM_Connector" exchange-pattern="one-way" path="APIKeyLoadResponse"> </vm:inbound-endpoint> </request-reply> <logger message="End of APIKeyLoadFlow" level="INFO" doc:name="EXIT_LOG" /> <catch-exception-strategy doc:name="Catch Exception Strategy"> <logger level="WARN" doc:name="Exception_Log" message="Exception in ApiKeyFlow #[System.getProperty('line.separator')] Error Description = #[exception.getMessage()]" /> </catch-exception-strategy> </flow> <flow name="ApiKeyLoadRestServiceFlow" doc:name="ApiKeyLoadRestServiceFlow"> <vm:inbound-endpoint exchange-pattern="one-way" path="APIKeyLoadRequest" doc:name="APIKey_Load_Request"> </vm:inbound-endpoint> <logger message="Start of ApiKeyLoadRestServiceFlow -#[payload]" level="INFO" doc:name="ENTRY_LOG" /> <jersey:resources doc:name="REST"> <component class="com.elexon.bmrs.apikey.service.impl.ApiKeyLoadImpl" /> </jersey:resources> <logger message="End of ApiKeyLoadRestServiceFlow" level="INFO" doc:name="EXIT_LOG" /> <vm:outbound-endpoint exchange-pattern="one-way" path="APIKeyLoadResponse" doc:name="APIKey_Load_Response"> </vm:outbound-endpoint> |
但是我在运行请求时遇到了异常？请告诉我实施流程中的问题是什么？
INFO 2015-12-08 13:09:59,792 [[apikey_load_phase3].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor：APIKeyLoadFlow 开始 -org.apache.commons .httpclient.ContentLengthInputStream@1517f14
信息 2015-12-08 13:09:59,813 [[apikey_load_phase3].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager：初始化：'VM_Connector.dispatcher.25489136'。对象是：VMMessageDispatcher
信息 2015-12-08 13:09:59,813 [[apikey_load_phase3].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager：开始：'VM_Connector.dispatcher.25489136'。对象是：VMMessageDispatcher
INFO 2015-12-08 13:09:59,830 [[apikey_load_phase3].ApiKeyLoadRestServiceFlow.stage1.02] org.mule.api.processor.LoggerMessageProcessor：ApiKeyLoadRestServiceFlow 开始 -org.apache.commons.httpclient.ContentLengthInputStream@1517f14
错误 2015-12-08 13:09:59,833 [[apikey_load_phase3].ApiKeyLoadRestServiceFlow.stage1.02] org.mule.exception.DefaultMessagingExceptionStrategy:
消息：调用 JerseyResourcesComponent{ApiKeyLoadRestServiceFlow.component.14630019} 失败。导致异常的组件是：JerseyResourcesComponent{ApiKeyLoadRestServiceFlow.component.14630019}。消息负载的类型：ContentLengthInputStream
代码：MULE_ERROR--2
异常堆栈是：
1.空(java.lang.NullPointerException)
org.mule.module.jersey.JerseyResourcesComponent:116(空)
2. JerseyResourcesComponent{ApiKeyLoadRestServiceFlow.component.14630019}调用失败。导致异常的组件是：JerseyResourcesComponent{ApiKeyLoadRestServiceFlow.component.14630019}。消息负载类型：ContentLengthInputStream (org.mule.component.ComponentException)
org.mule.component.AbstractComponent:144 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html)
根异常堆栈跟踪：
java.lang.NullPointerException
在 org.mule.module.jersey.JerseyResourcesComponent.doInvoke(JerseyResourcesComponent.java:116)
在 org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:122)
在 org.mule.component.AbstractComponent.access$000(AbstractComponent.java:57)
另外 3 个(设置调试级别日志记录或 '-Dmule.verbose.exceptions=true' 为所有内容)
Jersey 组件需要绑定到一个 http 端点，因此不确定它是否可以在 VM 端点后面工作，因为所有 http 标头和请求信息在通过传输障碍等时都会丢失。您可以尝试从在 vm 调用之前入站到出站，但仍然不确定这是否有效。