Camel-Spring, JavaConfig and Constructor-Based Injection

["Ziemer, Tom" <to...@wirecard.com>]

Hi,

currently I am setting up a new project using Spring and Camel. For a change, I wanted to use JavaConfig instead of the XML and had little problem injecting a ProducerTemplate. I am aiming for ConstructorBasedInjection, and @EndpointInject did not work for me.
What I ended up doing is the following:

@Configuration
@PropertySource("classpath:foo.properties")
@EnableJpaRepositories(basePackages = "x.y.foo.repository")
@EnableTransactionManagement
@ComponentScan(basePackages = { "x.y.foo.service", "x.y.foo.camel" })
public class ApplicationContext extends CamelConfiguration {

....
@Bean(destroyMethod = "stop")
    public ProducerTemplate producerTemplate() throws Exception{
        return camelContext().createProducerTemplate();
    }
...
}

This way I can use @Autowired to inject a producerTemplate:

@Service
public class FooServiceImpl implements FooService {
    private final ProducerTemplate producerTemplate;

   @Autowired
    public QuoteServiceImpl(ProducerTemplate producerTemplate) {
        Assert.notNull(producerTemplate, "producerTemplate must not be null.");
        this.producerTemplate = producerTemplate;
    }
...
}

Is this approach acceptable or is there a better way?

Regards,
Tom

Re: Camel-Spring, JavaConfig and Constructor-Based Injection

[Willem Jiang <wi...@gmail.com>]

You just leverage the feature which is provided by spring.
I think it’s OK to do it that way.

--  
Willem Jiang

Red Hat, Inc.
Web: http://www.redhat.com
Blog: http://willemjiang.blogspot.com (English)
http://jnn.iteye.com (Chinese)
Twitter: willemjiang  
Weibo: 姜宁willem



On October 10, 2014 at 8:39:03 PM, Ziemer, Tom (tom.ziemer@wirecard.com) wrote:
> Hi,
>  
> currently I am setting up a new project using Spring and Camel. For a change, I wanted to  
> use JavaConfig instead of the XML and had little problem injecting a ProducerTemplate.  
> I am aiming for ConstructorBasedInjection, and @EndpointInject did not work for me.  
> What I ended up doing is the following:
>  
> @Configuration
> @PropertySource("classpath:foo.properties")
> @EnableJpaRepositories(basePackages = "x.y.foo.repository")
> @EnableTransactionManagement
> @ComponentScan(basePackages = { "x.y.foo.service", "x.y.foo.camel" })
> public class ApplicationContext extends CamelConfiguration {
>  
> ....
> @Bean(destroyMethod = "stop")
> public ProducerTemplate producerTemplate() throws Exception{
> return camelContext().createProducerTemplate();
> }
> ...
> }
>  
> This way I can use @Autowired to inject a producerTemplate:
>  
> @Service
> public class FooServiceImpl implements FooService {
> private final ProducerTemplate producerTemplate;
>  
> @Autowired
> public QuoteServiceImpl(ProducerTemplate producerTemplate) {
> Assert.notNull(producerTemplate, "producerTemplate must not be null.");
> this.producerTemplate = producerTemplate;
> }
> ...
> }
>  
> Is this approach acceptable or is there a better way?
>  
> Regards,
> Tom
>