I am fairly new to Sprint and am using Spring 3.x and roo1.1.1 for my application.
I have multiple implementation of an interface which would be @Autowired into other different classes. I would only be able to decide which implementation to go with at the runtime. This should be achieved with like a factory pattern.
public interface SomeInterface {
public void doSomething();
}
Implementation 1.
public class SomeOb implements SomeInterface {
public void doSomething() {
//Do something for first implementation here
}
}
Implementation 2.
public class SomeOtherOb implements SomeInterface {
public void doSomething() {
//Do something for first implementation here
}
}
Now in my service i needed this Autowired like
@Service
public class MyService {
@Autowired
SomeInterface ob;
//Rest of the code here
}
1) The logic to choose which implementation to be Autowired is only know runtime, so i cannot use the @Qualifier annotation to qualify this. 2) I tried to create a FactoryBean like
public class SomeFactoryBean implements FactoryBean<SomeInterface> {
@Override
public SomeInterface getObject() throws Exception {
if(/*Somecondition*/) {
return new SomeOb();
} else
return new SomeOtherOb();
}
@Override
public Class<? extends SomeInterface> getObjectType() {
if(/*Somecondition*/) {
return SomeOb.class;
} else
return SomeOtherOb.class;
}
@Override
public boolean isSingleton() {
return false;
}
}
In the applicationContext.xml i have the tag mentioned.
When i run the webserver i run into an error like
No unique bean of type [com.xxxx.xxxx.SomeInterface] is defined: expected single matching bean but found 3: [xxxx, xxxxxxx, xxxxFactory]
Can anyone please help me to resolve this issue. If i am not doing this right please direct me to do this the right way.
Thanks and appreciate any help, jjk
