Cant inject bean in Processor

Question

I'm trying to use @BeanInject in a processor but it is always null.

I can access the bean in a RouteBuilder, and also in a Processor if it is defined in the RouteBuilder but not if the Processor class is in its own file.

Is this not supported or am I missing something?

[Updated] I'm using Apache Camel 2.17.2 and the code is taken from camel-example-cdi The code below prints the object instance in the first processor but not the second. The code is run in a unit test.

public class MyRoutes extends RouteBuilder {
final static Logger LOG = LoggerFactory.getLogger(MyRoutes.class);

@Inject
@Uri("timer:foo?period=5000" )
private Endpoint inputEndpoint;

@Inject
@Uri("log:output")
private Endpoint resultEndpoint;

@BeanInject
private SomeBean someBean;

@Override
public void configure() {
    from("timer:foo?period=500")
        .to("bean:counterBean")
            .process(new Processor(){

                @Override
                public void process(Exchange exchange) throws Exception {
                    LOG.info("[" + someBean + "]");
                }
            })
        .process(new MyProcessor())
        .to("mock:result");
   }
}

The processor

public class MyProcessor implements Processor {
final static Logger LOG = LoggerFactory.getLogger(MyProcessor.class);

@BeanInject
private SomeBean someBean;

@Override
public void process(Exchange exchange) throws Exception {
    LOG.info("In processor [" + someBean + "]");
}
}

It would help if you show some code, and tell us what version of Camel you use, and how you start/run Camel — Claus Ibsen, Nov 10 '17 at 07:42
Hi, sorry yes I should have done that. I have updated the post. — Johan E, Nov 10 '17 at 07:53

score 3 · Accepted Answer · answered Nov 10 '17 at 09:17

If you are using CDI then you should favour using @Inject over Camel's @BeanInject - the latter is a poor mans substitute if you dont use CDI or Spring IoC etc, and only useable for Camel beans.

In terms of your issue then its because you create the MyProcessor instance yourself via the new constructor. Then its standard Java that creates the instance and its not CDI or Apache Camel doing so, and therefore you cannot have dependency injection.

You can use CDI and its named beans and then have dependency injection in your processors as well - eg use standard CDI annotations. And inject your processor via @Inject into the RouteBuilder and call this instance from your Camel route.

Thanks for your help Claus. I will have to rethink my approach then. — Johan E, Nov 10 '17 at 11:20

score 1 · Answer 2 · edited Apr 10 '18 at 12:14

1

In the producer you can use the lookup method from the registry

SomeBean someBean = (SomeBean)exchange.getContext().getRegistry().lookupByName("someBean");

edited Apr 10 '18 at 12:14

mag_zbc

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answered Apr 10 '18 at 11:45

user9624638

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Cant inject bean in Processor

2 Answers2