最近工作中,遇到一个很奇怪的问题:
现象:在camel开发中,通过 IBM Websphere MQ 给assasin 发送xml的message时,会多出<mcd>等这样的header出来
经查:
Being that Camel is using the JMS API to write a message to an MQ
queue, MQ will use the RHQ2 header to store information about the
message, etc. However, the reading app is a non-JMS app, which cannot
read the RFH2 header. We would like to strip the header by utilizing the
targetClient=MQ in our put call, but this isn't working. We tried
targetClient=1 as well
原因是MQ自动加上这些header信息,而client端又无法识别,所以无法读取,出现异常。
解决方案:
在返回给client时,queue加上targetClient=1 ,告诉MQ驱动,不要发送header信息。
<route id="qname">
<from uri="amq:queue:qname" />
<transacted ref="requiredJta" />
<to uri="log:com.wellsfargo.1txc?showHeaders=true&showBody=false&multiline=false&level=INFO"/>
<setHeader
headerName="CamelJmsDestinationName"><constant>queue:///qname?targetClient=1</constant></setHeader>
<to uri="wmq:queue:qname" />
</route>
另一种方案:
用这个类配置在jmsConfiguartion类里:
https://jira.spring.io/secure/attachment/12688/IBMWebSphereMqDestinationResolver.java
example code :
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package org.springframework.jms.support.destination; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.Session; import com.ibm.mq.jms.JMSC; import com.ibm.mq.jms.MQDestination; /** * * Dynamic destination resolver which can set some IBM WebSphere MQ * specific properties. * * @author <a href="mailto:david@davidkarlsen.com">David J. M. Karlsen</a> * @see com.ibm.mq.jms.JMSC * @see DestinationResolver * @see DynamicDestinationResolver * */ public class IBMWebSphereMqDestinationResolver extends DynamicDestinationResolver implements DestinationResolver { private int ccsid = 819; private int encoding = JMSC.MQJMS_ENCODING_NATIVE; private int failIfQuiesce = JMSC.MQJMS_FIQ_YES; private int targetClient = JMSC.MQJMS_CLIENT_JMS_COMPLIANT; /** * @param ccsid * Character set for automatic conversion of message payload. * <p> * Defaults to com.ibm.mq.jms.JMSC.MQJMS_FIQ_YES */ public void setCcsid( int ccsid ) { this.ccsid = ccsid; } /** * @param encoding * Encoding for message payload. * <p> * Defaults to com.ibm.mq.jms.JMSC.MQJMS_ENCODING_NATIVE */ public void setEncoding( int encoding ) { this.encoding = encoding; } /** * @param failIfQuiesce * * Control graceful exits when queue manager is quesing. * <p> * Defaults to com.ibm.mq.jms.JMSC.MQJMS_FIQ_YES */ public void setFailIfQuiesce( int failIfQuiesce ) { this.failIfQuiesce = failIfQuiesce; } /** * @param targetClient * Control target client type (JMS compliant or not). * <p> * Defaults to com.ibm.mq.jms.JMSC.MQJMS_CLIENT_JMS_COMPLIANT */ public void setTargetClient( int targetClient ) { this.targetClient = targetClient; } protected int getCcsid() { return ccsid; } protected int getEncoding() { return encoding; } protected int getFailIfQuiesce() { return failIfQuiesce; } protected int getTargetClient() { return targetClient; } /** * {@inheritDoc} * @see DestinationResolver#resolveDestinationName(Session, String, boolean) */ public Destination resolveDestinationName( Session session, String destinationName, boolean isPubSubDomain ) throws JMSException { Destination destination = super.resolveDestinationName( session, destinationName, isPubSubDomain ); if ( destination instanceof MQDestination ) { MQDestination mqDestination = (MQDestination) destination; mqDestination.setCCSID( getCcsid() ); mqDestination.setEncoding( getEncoding() ); mqDestination.setFailIfQuiesce( getFailIfQuiesce() ); mqDestination.setTargetClient( getTargetClient() ); } return destination; } }
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其中代码:private int targetClient = JMSC.MQJMS_CLIENT_JMS_COMPLIANT;
要改成: private int targetClient = JMSC.MQJMS_CLIENT_NONJMS_MQ;