AEM 6.2: Multiple classes implementing Preprocessor. Which one is picked first?

[Shubham_borole]

I created two classes (eg MyClass1 & MyClass2) implementing the com.day.cq.replication.Preprocessor interface.

In both I override the preprocess() and add logs.

When I activate a page, always MyClass1 (for eg) log statements are printed first. What is the reason for this and how can I control which of the Preprocessor class should be picked first?

My class looks like below:

@Service(Preprocessor.class)
@Component(metatype = true, 
label="Class One",
description="Do something")
public class MyClass1 implements Preprocessor {
    private static final Logger LOG = LoggerFactory.getLogger(MyClass1.class);
    @Reference
    private Replicator replicator;
    /**
     *
     * 
     * @see Preprocessor#preprocess(ReplicationAction, ReplicationOptions)
     */
    @Override
    public void preprocess(ReplicationAction action, ReplicationOptions options) throws ReplicationException {
LOG.info("In MyClass1")
    }
    }

[smacdonald2008]

With AEM Services - you can specify ranking:

OSGI Service Ranking | Chris Keetch

[Shubham_borole]

Thanks for the response. I tried adding below but still that class is  not hit first..

@Service(Preprocessor.class)
@Component(metatype = true, 
label="Class One",
description="Do something")

@Properties({
    @Property(name=Constants.SERVICE_RANKING, intValue=8000000, propertyPrivate=true)
})

Is there an example that can be tried?

Updated above. Also tried with and without 'propertyPrivate=true'