Kafka consumer using Apache Camel

Question

I am new to Apache camel. we are doing POC to develop kafka consumer using Camel. Below is the sample code.

    context.addRoutes(new RouteBuilder(){

      @Override
        public void configure() throws Exception {
            // TODO Auto-generated method stub

         from("kafka:{{consumer.topic}}?brokers={{kafka.host}}:{{kafka.port}}" 
                     + "&consumersCount={{consumer.consumersCount}}" 
                     + "&seekTo={{consumer.seekTo}}" 
                     + "&groupId={{consumer.group}}")
             .process(new Processor() {

                @Override
                public void process(Exchange exchange) throws Exception {

                    Message message = exchange.getIn();
                    Object data = message.getBody();

                    System.out.println(data);
                }
             })
             .to("seda:end");


  });

        context.start();

    ConsumerTemplate template=context.createConsumerTemplate();
    String info=template.receiveBody("seda:end",String.class);

    System.out.println(info);
}

I am having below issues:

1. Context stops immediately after start.
2. If I poll To endpoint using consumer template, it does not print anything whereas inside .process(), I am able to print kafka messages when I start context in infinite loop. Why consumer template is not able to print.

Answer 1

1. As Claus already commented, your Camel Context is shutting down immediately because it is not blocking. See the links in his comment.
2. I think you missed a template.start(); to start your Consumer. See this link for an example.