[每日一学]apache camel|IBMWebsphere MQ header issue|MQRFH2 |MQSTR

 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&amp;showBody=false&amp;multiline=false&amp;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 :

==============================================================================

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;
    }

}
===============================================================================================================

其中代码：private int targetClient = JMSC.MQJMS_CLIENT_JMS_COMPLIANT;

要改成：   private int targetClient = JMSC.MQJMS_CLIENT_NONJMS_MQ;