[CAMEL-8723] Add desired message type to ProducerTemplate.sendBody methods

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 2.15.1
• Fix Version/s: 2.18.0
• Component/s: camel-core
• Labels: pojo type-converter
• Estimated Complexity: Moderate
• Assignee: Luca Burgazzoli
• Reporter: Geert Schuring
• Created: 30/Apr/15 12:47
• Updated: 03/May/16 13:29
• Resolved: 03/May/16 13:29

Description

Using Pojo Messaging annotations, Camel automatically uses the Type Converter system to unmarshall XML messages to JAXB objects in the following scenario:

public class CamelPojoDemo {
	
    @Produce(uri = "amq:camelpojodemo.reply")
    private ProducerTemplate producer;
	
    @Consume(uri = "amq:camelpojodemo.request")
    public void trigger(UpdateMarketDataMessage message) {
    	String result = "Processed prices: " + message.getMarketData().getPrices().size();
    	producer.sendBody(result);
    }
}

However, handing the producer a JAXB object and expecting it to marshall it to XML before sending it does not seem possible in the current API.

I would like to propose to add the following method to the ProducerTemplate:

  /**
     * Sends the body to the default endpoint after converting it to the given type
     * <br/><br/>
     * <p/><b>Notice:</b> that if the processing of the exchange failed with an Exception
     * it is thrown from this method as a {@link org.apache.camel.CamelExecutionException} with
     * the caused exception wrapped.
     *
     * @param body the payload to send
     * @param type the type which the body should be converted to before sending
     * @throws CamelExecutionException if the processing of the exchange failed
     */
    void sendBody(Object body, Class type) throws CamelExecutionException;

This would allow users to send a JAXB object and instruct Camel to use its Type Converter system to marshall the object to XML:

producer.sendBody(jaxbObject, String.class);

Note: The sendBody, sendBodyAndHeader and sendBodyAndProperty methods are all overloaded several times which could mean quite a number of new methods.

Issue Links

• relates to: CAMEL-9602 ProducerTemplateBuilder