Spring Integration出站通道适配器目标表达式MQMDMessageContext

Question

我正在使用Spring-Integration jms outbound-channel-adapter将消息发送到动态队列。我使用了属性destination-expression="headers.DestinationQueueName"。 DestinationQueueName在写入OUT_MSG频道的出站邮件之前在代码中设置。

  

  
1. ＆lt; int-jms：outbound-channel-adapter id =＆＃34; msgWrtr＆＃34;
  
2. 连接工厂=＆＃34; MQConnectionFactory＆＃34;信道=＆＃34; OUT_MSG＆＃34;
  
3. 目的地表达=＆＃34; headers.DestinationQueueName＆＃34;＆GT;
  
4. ＆LT; / INT-JMS：出站通道适配器及GT;
  

如何在队列中设置这些属性：MQMDMessageContext，MQMDReadEnabled和MQMDWriteEnabled？

Answer 1

如何而不只是DestinationQueueName字符串将com.ibm.mq.jms.MQQueue对象添加到标题中，当然还有这些选项？

Answer 2

您的动态目标名称标头表达式很好。只需为您的JmsTemplate实例配置自定义目标解析器即可。

@Bean
public MQDestinationResolver mqDestinationResolver() {
    return new MQDestinationResolver();
}

public class MQDestinationResolver extends DynamicDestinationResolver implements CachingDestinationResolver {
        private final Map<String, Destination> destinationCache = new ConcurrentHashMap<>(16);
        private boolean cache = true;

        public void setCache(boolean cache) {
            this.cache = cache;
        }


    @Override
    public Destination resolveDestinationName(@Nullable Session session, String destinationName, boolean pubSubDomain)
            throws JMSException {
        Destination destination = this.destinationCache.get(destinationName);
        if (destination == null) {
            destination = super.resolveDestinationName(session, destinationName, pubSubDomain);
            MQDestination mqDestination = (MQDestination) destination;
            // Set IBM MQ specific destination properties
            mqDestination.setMQMDReadEnabled(true);
            mqDestination.setMQMDWriteEnabled(true);
            mqDestination.setMessageBodyStyle(WMQConstants.WMQ_MESSAGE_BODY_UNSPECIFIED);
            mqDestination.setTargetClient(WMQConstants.WMQ_CLIENT_JMS_COMPLIANT);
            if (this.cache) {
                this.destinationCache.put(destinationName, destination);
            }
        }
        return destination;
    }

    @Override
    public void removeFromCache(String destinationName) {
        this.destinationCache.remove(destinationName);
    }

    @Override
    public void clearCache() {
        this.destinationCache.clear();
    }
}