request scoped beans in spring testing

Question

I would like to make use of request scoped beans in my app. I use JUnit4 for testing. If I try to create one in a test like this:

@RunWith(SpringJUnit4Clas         


        

Answer 1

Test Request-Scoped Beans with Spring explains very well how to register and create a custom scope with Spring.

In a nutshell, as Ido Cohn explained, it's enough to add the following to the text context configuration:

<bean class="org.springframework.beans.factory.config.CustomScopeConfigurer">
    <property name="scopes">
        <map>
            <entry key="request">
                <bean class="org.springframework.context.support.SimpleThreadScope"/>
            </entry>
        </map>
    </property>
</bean>

Instead of using the predefined SimpleThreadScope, based on ThreadLocal, it's also easy to implement a Custom one, as explained in the article.

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.config.Scope;

public class CustomScope implements Scope {

    private final Map<String , Object> beanMap = new HashMap<String , Object>();

    public Object get(String name, ObjectFactory<?> factory) {
        Object bean = beanMap.get(name);
        if (null == bean) {
            bean = factory.getObject();
            beanMap.put(name, bean);
        }
        return bean;
    }

    public String getConversationId() {
        // not needed
        return null;
    }

    public void registerDestructionCallback(String arg0, Runnable arg1) {
        // not needed
    }

    public Object remove(String obj) {
        return beanMap.remove(obj);
    }

    public Object resolveContextualObject(String arg0) {
        // not needed
        return null;
    }
}

Answer 2

MariuszS' solution works, except I couldn't get the transaction committed properly.

It seems the newly released 3.2 has finally made testing request/session scoped beans first class citizens. Here's a couple of blogs for more details.

Rossen Stoyanchev's Spring Framework 3.2 RC1: Spring MVC Test Framework

Sam Brannen's Spring Framework 3.2 RC1: New Testing Features