CODEWITHSUNDEEP
javaintegrationapache-camel
armandino
armandino

Reputation: 18518

Dynamic to(URI) in Camel

I'd like configure a Camel route where the to(uri) can be specified at runtime.

I tried the following:

public class Foo extends RouteBuilder {
    @Override
    public void configure() {
        // the URI can point to different hosts
        from("direct:start").to(${someUri}");
    }
}

and then

ProducerTemplate pt = camelContext.createProducerTemplate();
pt.requestBodyAndHeader("direct:start", "someUri", "http://example.com");

However the above doesn't work (Camel complains about not having a default Endpoint).

What's the best way to go about this?

Upvotes: 2

Views: 12246

Answers (3)

Tharali Janardhan
Tharali Janardhan

Reputation: 1

I simply used curly braces without the '$' before it. Here is what I did:

{headers.reQueueName} instead of ${headers.reQueueName} for the uri and it worked : 
  <to id="requeue" uri="jmsamq:queue:{headers.reQueueName}"/> here is my implementation    :    


<route id="_throttleRoute">
            <from id="throttleRouteStarter" uri="direct:throttleRouteService"/>
            <log id="_Step_5" message="Camel throttle Route Started"/>
            <log id="_Step_5_1" message="Camel throttle Route is ${headers.next}"/>
            <to id="restThrottleCall" uri="restlet:http://host:port/path"/>
            <process id="throttleRouteProcess" ref="throttleServiceProcessor"/>
            <choice id="_choice2">`enter code here`
                <when id="_when3">
                    <simple>${headers.next} == 'requeue'</simple>   
                    <to id="requeue" uri="jmsamq:queue:{headers.reQueueName}"/>
                    <log id="_Step_wait1" message="ReQueue sending to ${headers.reQueueName}"/>
                </when>
                <when id="_when4">
                    <simple>${headers.next} == 'process'</simple>
                    <log id="_logNext" message="Invoking Next Work Unit ${headers.next}"/>
                    <process id="jBPMRouteProcess" ref="jBPMRouteProcessor"/>
                </when>
                <otherwise id="_otherwise2">
                    <log id="_log5" loggingLevel="WARN" message="Next for orderId: ${headers.orderid} not found"/>
                </otherwise>
            </choice>
        </route>

Upvotes: 0

Santiago Alzate
Santiago Alzate

Reputation: 407

Although this question has already been answered, I wanted to share this other option to achieve what you're looking for, in case someone else still wonders how to do it:

There is a new method since Camel 2.16 called "toD" wich basically means a "dynamic to". Here is the official reference documentation.

from("direct:start")
  .toD("${someUri}");

In this case, the toD method resolves the argument using the Simple language wich means you can use any property that the language supports.

You can also take a look at this other StackOverflow answer, about that same topic.

Upvotes: 4

Ben ODay
Ben ODay

Reputation: 21005

see these links for reference:

http://camel.apache.org/how-do-i-use-dynamic-uri-in-to.html

http://camel.apache.org/recipient-list.html

for an example, see this unit test

https://svn.apache.org/repos/asf/camel/trunk/camel-core/src/test/java/org/apache/camel/processor/RecipientListTest.java

Upvotes: 3

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