Problems with ehcache:annotation-driven and spring 3.0.5 component scan

[Jonas]

Hey guys,

I have a problem configuring Spring 3.0.5 with ehcache:annotation
driven.

If I configure the ehcache, Autowireing of all beans including a
@Cacheable Annotation fails. If I remove the Annotation OR the
Configuration in the applicationContext the project works fine again.
Here are some snippets of my configuration:

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ehcache="http://ehcache-spring-annotations.googlecode.com/svn/
schema/ehcache-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring
http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring/ehcache-spring-1.1.xsd
">

<context:component-scan base-package="de.myproject" />
<ehcache:annotation-driven cache-manager="ehCacheManager" />

[...]

<bean id="ehCacheManager"
class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="shared" value="false"/>
<property name="configLocation" value="classpath:ehcache.xml"/>
</bean>


and the failing class:


@Service
public class ConfigurationServiceImpl implements ConfigurationService
{
[...]

@Override
@Cacheable(cacheName = "professionList")
public LinkedList<String> getProfessionListByTerm(String language,
String term, String gender) {
[...]
}
}

I am using Spring 3.0.5.RELEASE with

<dependency>
<groupId>com.googlecode.ehcache-spring-annotations</groupId>
<artifactId>ehcache-spring-annotations</artifactId>
<version>1.1.3</version>
</dependency>

and


<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.3.2</version>
<type>pom</type>
</dependency>

Has anyone an idear whats going wrong here?

Thank you!

[Eric Dalquist]

Can you include one of your @Autowired setters that fails to be called?

-Eric

[Jonas Lanzendörfer]

@Component

public class AutocompleteProfessionMethodProcessor implements MethodProcessor {

@Autowired

ConfigurationServiceImpl configurationService;

[...]

[Eric Dalquist]

You need to inject the interface, not the implementation. @Cacheable works just like any other Spring AOP proxy where a wrapper class is generated that implements all of the interfaces of the target class. Because of this you cannot cast the wrapped class to its actual implementation, you must use the interface that defines the class's APIs to interact with it.

So change your autowiring to:

@Autowired
ConfigurationService configurationService


-Eric

[Jonas Lanzendörfer]

Oh great, didn´t know that. Saved me a lot of time, thank you so much!

[Eric Dalquist]

No problem, in general when working with Spring beans should only ever depend on other interfaces. That is how Spring assumes the application will be designed and the only way you really get a loosely coupled application.

-Eric