java - Using @Transaction annotation with @Autowired - Spring

Question

Well, i have a Class with @Service annotation and some strange occurrs: When i put the annotation @Transaction in some method i can't start tomcat server, i got error: "Can not autowired..." in another class when i use my @Autowired, but when i remove the @Transaction all works fine.

My class header is:

@Service(value = "caixaBO")
public class CaixaBOImpl extends BasicBOImpl {

And my method signature is:

@Transactional(propagation = Propagation.REQUIRED)
public void movimentarCaixaPaciente(String descricao, double valor,
        Paciente paciente) {

When i use @Autowired CaixaBOImpl caixaBO, i got error in tomcat initialized because the annotation @Transaction.

EDIT 1:

1 - I have transactionManager in applicationContext.xml, look:

<!-- Configuracao do gerente de transacoes do Spring -->
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

2 - I have CGLIB in pom.xml, look:

<dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib-nodep</artifactId>
            <version>2.2.2</version>
        </dependency>

EDIT 2

My stack trace:

Grave: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pedidoProteseBO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private br.com.odontonew.financeiro.bo.CaixaBOImpl br.com.odontonew.odonto.bo.PedidoProteseBOImpl.caixaBO; nested exception is java.lang.IllegalArgumentException: Can not set br.com.odontonew.financeiro.bo.CaixaBOImpl field br.com.odontonew.odonto.bo.PedidoProteseBOImpl.caixaBO to com.sun.proxy.$Proxy36
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4701)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5204)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5199)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:724)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private br.com.odontonew.financeiro.bo.CaixaBOImpl br.com.odontonew.odonto.bo.PedidoProteseBOImpl.caixaBO; nested exception is java.lang.IllegalArgumentException: Can not set br.com.odontonew.financeiro.bo.CaixaBOImpl field br.com.odontonew.odonto.bo.PedidoProteseBOImpl.caixaBO to com.sun.proxy.$Proxy36
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
    ... 20 more
Caused by: java.lang.IllegalArgumentException: Can not set br.com.odontonew.financeiro.bo.CaixaBOImpl field br.com.odontonew.odonto.bo.PedidoProteseBOImpl.caixaBO to com.sun.proxy.$Proxy36
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81)
    at java.lang.reflect.Field.set(Field.java:741)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:504)
    ... 22 more

Answer 1

There are two situations I can think of that might cause this

1. You haven't declared a TransactionManager and therefore @Transactional advice cannot be applied.
2. Your @Autowired target is declared as a field of type CaixaBOImpl and you don't have CGLIB libraries on your classpath for Spring to create class proxies. As such, it creates JDK Proxies which it fails to inject because the types don't match. You can get the CGLIB libraries here. Or you can change the @Autowired target field to type BasicBOImpl. This will be a problem if you are injecting other beans of type BasicBOImpl in your application without qualifying them with an id.

It seems that even though you have the CGLIB proxies, Spring is using JDK proxies anyway. Change your tx:annotation-driven declaration to

<tx:annotation-driven proxy-target-class="true" />