I logged a ticket to improve this https://issues.apache.org/jira/browse/CAMEL-8926
On Wed, Jul 1, 2015 at 8:43 PM, Claus Ibsen <claus.ib...@gmail.com> wrote: > Hi > > Ah its because Camel uses this to find the beans > > Map<String, RoutesBuilder> beans = > applicationContext.getBeansOfType(RoutesBuilder.class, true, true); > > And I suspect it causes spring to try to auto wire and create the > bean. Then thereafter the filtering is done, eg frankly we would need > to know the class name before we can exclude it. > > On Wed, Jul 1, 2015 at 5:04 PM, furchess123 <con...@hotmail.com> wrote: >> Hi, >> I am using Camel 2.14.2. All my RouteBuilder implementations are @Component >> annotated Spring beans, auto-wired with processors, error handlers, >> AggregationStrategy implementation beans, etc. I have been using >> *contextScan* to load these Spring beans into Camel context. However, I have >> one route builder implementation that is a prototype-scoped Spring bean, >> distinct instances of which may have to be created on-demand at runtime. It >> must NOT be component-scanned at startup. >> >> Per Camel's reference guide >> <http://people.apache.org/~dkulp/camel/spring.html> , I have tried to >> exclude that particular class from being component-scanned by Camel using >> the following: >> >> <camelContext xmlns="http://camel.apache.org/schema/spring";> >> <contextScan> >> *<excludes> >> com.myco.something.route.MyExcludedRouteBuilder >> </excludes>* >> </contextScan> >> </camelContext> >> >> *This doesn't work.* Camel doesn't seem to ignore this route builder class >> and tries to instantiate it at startup. I don't provide a no-arg constructor >> for that class (instances are requested from the Spring context on demand >> with a specific "from" endpoint value) so CamelContextFactoryBean throws the >> following exception: >> >> ... >> Caused by: org.springframework.beans.factory.BeanCreationException: Error >> creating bean with name 'MyExcludedRouteBuilder' defined in file >> [.../route/MyExcludedRouteBuilder.class]: Instantiation of bean failed; >> nested exception is org.springframework.beans.BeanInstantiationException: >> Could not instantiate bean class >> [com.myco.something.route.MyExcludedRouteBuilder]: No default constructor >> found; nested exception is java.lang.NoSuchMethodException: >> com.myco.something.route.MyExcludedRouteBuilder.<init>() >> at >> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1095) >> at >> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1040) >> at >> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:505) >> at >> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) >> at >> org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) >> at >> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198) >> at >> org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:489) >> at >> org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1060) >> at >> org.apache.camel.spring.ContextScanRouteBuilderFinder.appendBuilders(ContextScanRouteBuilderFinder.java:49) >> at >> org.apache.camel.spring.CamelContextFactoryBean.findRouteBuildersByContextScan(CamelContextFactoryBean.java:233) >> at >> org.apache.camel.core.xml.AbstractCamelContextFactoryBean.findRouteBuilders(AbstractCamelContextFactoryBean.java:881) >> at >> org.apache.camel.core.xml.AbstractCamelContextFactoryBean.setupRoutes(AbstractCamelContextFactoryBean.java:344) >> at >> org.apache.camel.spring.CamelContextFactoryBean.onApplicationEvent(*CamelContextFactoryBean.java:326*) >> ... 56 more >> Caused by: org.springframework.beans.BeanInstantiationException: Could not >> instantiate bean class [com.myco.something.route.MyExcludedRouteBuilder]: No >> default constructor found; nested exception is >> java.lang.NoSuchMethodException: >> com.myco.something.route.MyExcludedRouteBuilder.<init>() >> at >> org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85) >> at >> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1088) >> ... 68 more >> Caused by: java.lang.NoSuchMethodException: >> com.myco.something.route.MyExcludedRouteBuilder.<init>() >> at java.lang.Class.getConstructor0(Class.java:2892) >> at java.lang.Class.getDeclaredConstructor(Class.java:2058) >> at >> org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80) >> ... 69 more >> >> >> I cannot find an example of using /excludes/ with /contextScan/, other than >> what I see here: >> http://camel.apache.org/spring.html >> >> It states that I can use the same ANT-style patterns to exclude/include >> classes as with /<packageScan>/. I have tried wild cards as well as >> specifying the full class name explicitly (as shown in the example above.) >> Nothing excludes the class during Camel's context scanning. Why? Am I doing >> it incorrectly? Or is it a bug? >> >> Thanks for any help! >> >> >> >> -- >> View this message in context: >> http://camel.465427.n5.nabble.com/Excluding-prototype-scoped-Component-route-builder-from-contextScan-tp5768755.html >> Sent from the Camel - Users mailing list archive at Nabble.com. > > > > -- > Claus Ibsen > ----------------- > Red Hat, Inc. > Email: cib...@redhat.com > Twitter: davsclaus > Blog: http://davsclaus.com > Author of Camel in Action: http://www.manning.com/ibsen > hawtio: http://hawt.io/ > fabric8: http://fabric8.io/ -- Claus Ibsen ----------------- Red Hat, Inc. Email: cib...@redhat.com Twitter: davsclaus Blog: http://davsclaus.com Author of Camel in Action: http://www.manning.com/ibsen hawtio: http://hawt.io/ fabric8: http://fabric8.io/
