I followed the example in chapter 14 of the book, "Camel in Action". I wish to hide the middleware from by business logic. While developing using "camel:run:", everything seemed to work pretty well.The configuration file is below:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd
">
<!-- camel activemq component to connect to the broker -->
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
<!-- the camel client -->
<camel:camelContext xmlns="http://camel.apache.org/schema/spring">
<proxy id="StreamProxy" serviceInterface="ird.StockStream.StreamService"
serviceUrl="activemq:queue:queueStream" />
</camel:camelContext>
</beans>
Then came along the requirement of deploying it inside servicemix. I followed the fuse guides and came to know of the steps that are required. I needed to change the bean schema to( I am assuming)
<
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:osgi="http://camel.apache.org/schema/osgi"
xmlns:osgix="http://www.springframework.org/schema/osgi-compendium"
xmlns:ctx="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd
http://camel.apache.org/schema/osgi http://camel.apache.org/schema/osgi/camel-osgi.xsd
http://www.springframework.org/schema/osgi-compendium http://www.springframework.org/schema/osgi-compendium/spring-osgi-compendium.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
">
<!-- camel activemq component to connect to the broker -->
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
<!-- the camel client -->
<osgi:camelContext xmlns="http://camel.apache.org/schema/spring">
<proxy id="StreamProxy" serviceInterface="ird.StockStream.StreamService"
serviceUrl="activemq:queue:queueStream" />
</osgi:camelContext>
</beans>
Finally, In order to use the proxy in the client, I do:
AbstractXmlApplicationContext ctx = new ClassPathXmlApplicationContext(
"classpath:META-INF/spring/camel-client.xml");
streamService=(StreamService) ctx.getBean("StreamProxy");
I get the following error, which I don’t seem to be able to fix. I don’t think I am doing anything wrong here, please help. I have exhausted my search, no one seems to be able to answer this question.Any help here is appreciated.My karaf.framework=equinox and the correct bundles have been installed.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'activemq' defined in class path resource [META-INF/spring/camel-client.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'camelContext': FactoryBean threw exception on object creation; nested ex
lPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:574)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:161)
at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:51)
at ird.StockStream.StreamClient.initProperties(StreamClient.java:83)
at ird.StockStream.StreamClient.<init>(StreamClient.java:67)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:71)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:948)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:901)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:574)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$1600(AbstractDelegatedExecutionApplicationContext.java:69)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:355)
at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:320)
at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:136)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'camelContext': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:109)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1414)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:245)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075)
at org.apache.camel.spring.CamelBeanPostProcessor.postProcessBeforeInitialization(CamelBeanPostProcessor.java:95)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1405)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075)
at org.apache.开发者_如何学JAVAcamel.spring.CamelBeanPostProcessor.postProcessBeforeInitialization(CamelBeanPostProcessor.java:95)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:394)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1405)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
... 34 more
Caused by: java.lang.NullPointerException
at org.apache.camel.core.osgi.OsgiPackageScanClassResolver.<init>(OsgiPackageScanClassResolver.java:39)
at org.apache.camel.core.osgi.OsgiCamelContextHelper.osgiUpdate(OsgiCamelContextHelper.java:45)
at org.apache.camel.osgi.OsgiSpringCamelContext.<init>(OsgiSpringCamelContext.java:34)
at org.apache.camel.osgi.CamelContextFactoryBean.newCamelContext(CamelContextFactoryBean.java:50)
at org.apache.camel.spring.CamelContextFactoryBean.createContext(CamelContextFactoryBean.java:279)
at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:290)
at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:79)
at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.getContext(AbstractCamelContextFactoryBean.java:594)
at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.getObject(AbstractCamelContextFactoryBean.java:108)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)
... 53 more
You should not change the namespace. The namespace http://camel.apache.org/schema/osgi is @deprecated
And you should not use Spring to load the XML file again.
AbstractXmlApplicationContext ctx = new ClassPathXmlApplicationContext( "classpath:META-INF/spring/camel-client.xml");
And what do you mean by client? Is the client running inside the ESB or from standalone. Where is the client running?
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