Spring @Configuration with Activiti

kebo — Mon, 17 Feb 2014 19:06:44 GMT

Hi,I'm new in activiti and I met problem with configuration activiti. I get null pointer when I want to load this configurationackage org.workflow.config;import org.activiti.engine.IdentityService;import org.activiti.engine.RuntimeService;import org.activiti.spring.ProcessEngineFactoryBean;import

Re: Spring @Configuration with Activiti

patelag — Tue, 18 Feb 2014 06:24:58 GMT

Please share complete error stack trace.
I think you have missed injection of of activiti object

Re: Spring @Configuration with Activiti

kebo — Tue, 18 Feb 2014 11:16:55 GMT

<code>
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'runtimeService' defined in class org.workflow.config.ActivitiConfiguration: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [org.activiti.engine.RuntimeService org.workflow.config.ActivitiConfiguration.runtimeService()] threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1015)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
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:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.workflow.config.App.main(App.java:12)
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [org.activiti.engine.RuntimeService org.workflow.config.ActivitiConfiguration.runtimeService()] threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:169)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
… 12 more
Caused by: java.lang.NullPointerException
at org.workflow.config.ActivitiConfiguration.runtimeService(ActivitiConfiguration.java:58)
at org.workflow.config.ActivitiConfiguration$$EnhancerByCGLIB$$41b535fe.CGLIB$runtimeService$4(<generated>)
at org.workflow.config.ActivitiConfiguration$$EnhancerByCGLIB$$41b535fe$$FastClassByCGLIB$$f20dd707.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at org.workflow.config.ActivitiConfiguration$$EnhancerByCGLIB$$41b535fe.runtimeService(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:149)
… 13 more
</code>

Re: Spring @Configuration with Activiti

jbarrez — Tue, 25 Feb 2014 08:30:12 GMT

Spring doesn't know the order in which to instantiate the beans, this is why the getProcessEngineBean() returns null.

To fix it, you need to use @DepensOn() or @Inject in a custom bean that wraps the runtimeservice.

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Spring @Configuration with Activiti

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