How to make Spring perform real JNDI lookup if the lookup attribute is present in Resource annotation - spring

Question

We'd like to test EJB-s in unit tests as Spring components.
The one of the EJB-s using the Resources annotation in order to look up a JNDI values like this:
#Resource(lookup = "java:global/myapp/portal/url")
private String portalUrl;
The problem is that it seems that Spring tries to look up the value by type i.e. it looks for a bean of type java.lang.String in the application context instead of using JNDI.
Here's our code.
1st context:
<bean id="serverMock" class="myapp.JndiServerMock">
</bean>
2nd context:
<context:annotation-config />
<context:component-scan base-package="myapp">
<context:include-filter type="annotation" expression="javax.ejb.Stateless" />
<context:include-filter type="annotation"
expression="javax.annotation.Resources" />
</context:component-scan>
<bean
class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor">
<property name="alwaysUseJndiLookup" value="true" />
</bean>
<bean id="clientMock" class="myapp.JndiClientMock">
<bean id="java:global/myapp/portal/url" class="java.lang.String">
<constructor-arg value="http://localhost:8080" type="java.lang.String"/>
</bean>
JndiServerMock:
public class JndiServerMock {
public JndiServerMock() throws IllegalStateException, NamingException {
SimpleNamingContextBuilder builder = new SimpleNamingContextBuilder();
builder.bind("java:global/myapp/portal/url", "http://localhost:8080");
builder.activate();
}
}
JndiClientMock:
public class JndiClientMock {
public JndiClientMock() throws NamingException {
Hashtable<String, String> prop = new Hashtable<String, String>();
prop.put(Context.INITIAL_CONTEXT_FACTORY, "org.springframework.mock.jndi.SimpleNamingContextBuilder");
InitialContext ic = new InitialContext(prop);
System.err.println("result = " + ic.lookup("java:global/myapp/portal/url"));
}
}
ExampleBean:
#Stateless
public class ExampleBean {
#Resource(lookup = "java:global/myapp/portal/url")
private String portalUrl;
public ExampleBean() {
System.err.println("portalUrl = " + portalUrl);
}
}
public class MainApp {
public static void main(String[] args) {
System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.springframework.mock.jndi.SimpleNamingContextBuilder");
ApplicationContext applicationContext =
new ClassPathXmlApplicationContext("/spring/firstContext.xml",
"/spring/secondContext.xml");
ExampleBean exampleBean = applicationContext.getBean(ExampleBean.class);
}
}
If the "java:global/myapp/portal/url" bean definition is omitted then the following exception will be thrown:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [java.lang.String] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#javax.annotation.Resource(shareable=true, lookup=java:global/myapp/portal/url, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:457)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:435)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:559)
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:169)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:305)
... 13 more

Answer 1

I think the problem here is how you're trying to set the JNDI entry in the Spring config - here's an example of how to do this. This provides examples of other ways of achieving the same thing. However, if you're looking to do this for a unit test, I think the JUnit section here is likely to be a neater approach, but it certainly looks like you have lots of options!