Guice 3 in Struts2

Question

I'm trying to integrate Guice 3 into my Struts application. This is what I did : Interface:

public interface PersonDAO{
    void addPerson(String username);
}

Implementation:

@Singleton
public Class PersonDAOImpl implements PersonDAO{
    void addPerson(String username){
        // Implementation
    }
}

I created the Guice module :

public class ServiceInjector extends AbstractModule {    
    @Override
    protected void configure() {
      bind(PersonDAO.class).to(PersonDAOImpl.class);
    }
}

Then I use it like this in my Action:

@Inject
private PersonDAO personDAO;

The problem is that personDAO is always null.

Question : how can I properly integrate Guice to my application ?

Regards.

score 0 · Answer 1 · answered Jan 17 '17 at 09:16

Never tried, but:

include in your project a Struts2 plugin written to interact with Guice (the Guice-Struts2 plugin);
for example, with Guice 4 and Maven, in your pom.xml it would be:
```
<dependency>
    <groupId>com.google.inject.extensions</groupId>
    <artifactId>guice-struts2</artifactId>
    <version>4.1.0</version>
</dependency>
```
Then, in your struts.xml, specify that the ObjectFactory is guice:
```
<constant name="struts.objectFactory" value="guice" />
```

It should be enough.

Guice 3 in Struts2

1 Answers1