spring dependency injection issue : NullPointerException

[pmarreddy]

hi,

we are exploring alfreco for a while, its a great product, we are considering to provide content services which would have been very difficult with out alfresco.

i have some issues in trying to use spring dependency injection, it would be great if somebody can figure out the solution.

<bean id="initTest" class="org.alfresco.example.inittest" >
<property name="authenticationService">
<ref bean="authenticationService" />
</property>
</bean>
</beans>



i have defined this in application-context.xml in repository and used it in the following way.


package org.alfresco.example;

import org.alfresco.service.cmr.security.AuthenticationService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class inittest {

private AuthenticationService authenticationService;

public void setAuthenticationService(AuthenticationService authenticationService)
{
System.out.println("hi");
this.authenticationService = authenticationService;
}

public void login() throws Exception
{


ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:alfresco/application-context.xml");

authenticationService.authenticate("admin", "admin".toCharArray());
}
}

i am getting

Exception in thread "main" java.lang.NullPointerException
at org.alfresco.example.inittest.login(test1.java:23)
at org.alfresco.example.loggie.main(loggie.java:14)

if i am using getbean it works fine.

adv thanks prasanth

[rwetherall]

Hi,

First try putting the loading of the app context into a static member, rather than in the method ….

public static ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:alfresco/application-context.xml");

‍‍‍‍‍

… now the calling code should look something like this …

inittest obj = inittest.applicationContext.getBean("initTest");
obj.login();

‍‍‍‍‍‍

Hope this helps,
Roy

[pmarreddy]

yup it works, thanks.


i just want to conform, does it  work for all situations, i  looked at alfresco code and no where application context is defined in a static way.

ad thanks prasanth.

[davidc]

The initialisation of the Application context depends on the environment you're executing in.  For example, the Web Client uses web.xml to initialise a WebApplicationContext.  Take a look in web.xml (within the source bundle at /projects/web-client/source/web/web-inf) and search for ContextLoaderListener and contextConfigLocation.