Multiple Single

This is a use case in which we have multiple interfaces but only need to load one implementation during runtime.

Here are two interfaces.

public interface D1 {
    String d1();
}

public interface D2 {
    String d2();
}

And here is an implementation.

public class DImpl implements D1, D2 {
    @Override
    public String d1() {
        return "d1";
    }
    @Override
    public String d2() { return "d2"; }
}

Now we need to have a service.yml file to bind them together.

- com.networknt.service.D1, com.networknt.service.D2:
  - com.networknt.service.DImpl

To write a test case for it.

    @Test
    public void testMultipleInterfaceOneBean() {
        D1 d1 = SingletonServiceFactory.getBean(D1.class);
        D2 d2 = SingletonServiceFactory.getBean(D2.class);
        Assert.assertEquals(d1, d2);
    }