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Messages sent by Spring JmsTemplate not being received by normal JCSMP subscriber

alinaqvialinaqvi Member Posts: 25
edited November 22 in PubSub+ Software

I am able to successfully send and receive topic messages via Spring JMS but the messages are not being received by a normal Topic subscriber.

My jms code for sending and receiving is below:

  @Autowired
    private JmsTemplate jmsTemplate;


    public void run(String... strings) throws Exception {


        for( int i = 0 ; i < 100; i++) {
        String msg = "Hello World" + i;
        jmsTemplate.setPubSubDomain(true);
        //jmsTemplate.setdu
        logger.info("============= Sending " + msg);
       this.jmsTemplate.convertAndSend("abc/topic2", msg);

        Thread.sleep(1000);
        }
    }
}

@Component
static class MessageHandler {

    private static final Logger logger = LoggerFactory.getLogger(MessageHandler.class);


    @JmsListener(destination = "abc/topic2", containerFactory = "cFactory", concurrency = "2")
    public void processMsg(Message<?> msg) {
    // Works fine, no issues. 
        StringBuffer msgAsStr = new StringBuffer("============= Received \nHeaders:");
        MessageHeaders hdrs = msg.getHeaders();
        msgAsStr.append("\nUUID: "+hdrs.getId());
        msgAsStr.append("\nTimestamp: "+hdrs.getTimestamp());
        Iterator<String> keyIter = hdrs.keySet().iterator();
        while (keyIter.hasNext()) {
            String key = keyIter.next();
            msgAsStr.append("\n"+key+": "+hdrs.get(key));
        }
        msgAsStr.append("\nPayload: "+msg.getPayload());
        logger.info(msgAsStr.toString());
    }

 public CachingConnectionFactory producerCachingConnectionFactory() throws Exception {
    CachingConnectionFactory ccf = new CachingConnectionFactory(connectionFactory());
    ccf.setSessionCacheSize(1);

    return ccf;
}


@Bean
public JmsTemplate jmsTemplate() throws Exception {

    // CachingConnectionFactory ccf = new CachingConnectionFactory(cf);
    JmsTemplate jsmTemplate = new JmsTemplate(producerCachingConnectionFactory() );
    jsmTemplate.setPubSubDomain(true);
    jsmTemplate.setDeliveryPersistent(false); // tried both true and false. 

    //jsmTemplate.setSessionTransacted(true); // I get an exception ... isnt supported with Direct transport.
    return jsmTemplate;
}

@Bean
public ConnectionFactory connectionFactory() throws Exception {

    Hashtable<String, Object> env = new Hashtable<>();


    env.put(InitialContext.PROVIDER_URL, jndiProviderURL);
    env.put(Context.SECURITY_PRINCIPAL, username);
    env.put(Context.SECURITY_CREDENTIALS, password);
       System.setProperty("java.security.krb5.conf", KRB5_LOC);
    System.setProperty("java.security.auth.login.config", JAAS_LOC);
    env.put(SupportedProperty.SOLACE_JMS_AUTHENTICATION_SCHEME, 
   SupportedProperty.AUTHENTICATION_SCHEME_GSS_KRB);
    env.put(SupportedProperty.SOLACE_JMS_KRB_SERVICE_NAME, "HOST");
    env.put(SupportedProperty.SOLACE_JMS_VPN, vpn);
    env.put(SupportedProperty.SOLACE_JMS_DYNAMIC_DURABLES, false);
            env.put(SupportedProperty.SOLACE_JMS_DELIVER_TO_ONE_OVERRIDE , false);
          SolConnectionFactory cf = SolJmsUtility.createConnectionFactory(env );
    return cf;

}

@Bean
public DefaultJmsListenerContainerFactory cFactory(ConnectionFactory connectionFactory, DemoErrorHandler errorHandler) {
    DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
    factory.setConnectionFactory(connectionFactory);
    factory.setErrorHandler(errorHandler);
    factory.setPubSubDomain(true);
    factory.setSubscriptionDurable(false);
    return factory;
}

I wonder if you can spot some obvious issue here please?

Many Thanks,
Ali

Comments

  • marcmarc Member, Moderator, Employee Posts: 38 mod

    Hi Ali,
    To clarify a few things:

    • The MessageHandler in the code you're sharing is indeed receiving and processing the message?
    • Your other receiver, not in the post, is just the TopicSubscriber.java class as is with only a change to the TOPIC_NAME variable?
    • Can you share the rest of your class above where you autowire the jmstemplate?

    thanks,
    Marc

  • alinaqvialinaqvi Member Posts: 25

    Some thing wrong with the edit functionality of this forum ... posts get deleted magically.

  • alinaqvialinaqvi Member Posts: 25

    Attempt No2 for a reply... pls find my answers inline.

    @marc said:
    Hi Ali,
    To clarify a few things:

    • The MessageHandler in the code you're sharing is indeed receiving and processing the message?

    Yes that is correct.

    • Your other receiver, not in the post, is just the TopicSubscriber.java class as is with only a change to the TOPIC_NAME variable?

    Yap, code is below which is tried and tested as its part of a gui tool we use for testing on daily basis.

    private void subscribeSolaceTopic(String pTopic) {
    
    
        try {
            solaceConsumer = solaceSession.getMessageConsumer(new XMLMessageListener() {
    
                public void onReceive(BytesXMLMessage msg) {
                    LOG.info("onReceive->Message Dump: {}", msg.dump());
    
                    });
    
    
                }
    
                public void onException(JCSMPException e) {
                    LOG.error("Consumer received exception:  {}", e);
                }
            });
    
            Topic topic = JCSMPFactory.onlyInstance().createTopic(pTopic);
    
            solaceTopic = topic;
    
            solaceSession.addSubscription(topic);
    
            LOG.info("Connected. Awaiting message...");
            solaceConsumer.start();
    
        } catch (JCSMPException e1) {
            LOG.error(EXCEPTION_OCCURRED , e1);
    
        }
    
    }
    
    • Can you share the rest of your class above where you autowire the jmstemplate?

    The autowire is done on a field and its up there near the top of my first post. If you want I can try attaching the entire project ?

    Thanks,
    Ali

  • alinaqvialinaqvi Member Posts: 25

    Could it be that the call below is adding some thing to the name of the topic ?
    this.jmsTemplate.convertAndSend("abc/topic2", msg)

  • alinaqvialinaqvi Member Posts: 25

    Please ignore this for now ... I might have found the root cause for this. Will come back if the issue still persists.
    Thanks,
    Ali

  • marcmarc Member, Moderator, Employee Posts: 38 mod

    Thanks for the update Ali. Hope it's working for you :smile:
    I'm definitely curious what the issue was if you find that it was indeed the root cause.

    thanks,
    Marc

  • alinaqvialinaqvi Member Posts: 25

    Hey Marc,
    The receiver is basically a gui that was throwing exceptions behind the scenes because it was receiving wrong type of message.
    java.lang.ClassCastException: com.solacesystems.jcsmp.impl.XMLContentMessageImpl cannot be cast to
    com.solacesystems.jcsmp.BytesMessage

    To remedy this we are now using

      jmsTemplate.convertAndSend("abc/topic2", msg.getBytes()); // instead of just msg which is a String
    

    Apologies for the red herring post.
    Thanks,
    Ali

  • marcmarc Member, Moderator, Employee Posts: 38 mod

    Ali,
    Excellent - glad the issue is resolved. And thanks for sharing as I'm sure this will prove to be useful to someone else as well.

    -Marc

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