Google Appengine and rx-Java?

Question

Is rxJava library compatible with Google Appengine? If so are there any limitations? The only info I have found is mention of \'partial support\' on grepcode. http://grep

Answer 1

You should create a child of RxJavaSchedulersHook and override its methods using your scheduler which use com.google.appengine.api.ThreadManager: I've done it like this :

public class MyThreadSchedulersHook extends RxJavaSchedulersHook {

private final Executor executor = new ScheduledThreadPoolExecutor(10, ThreadManager.backgroundThreadFactory());

@Override
public Scheduler getComputationScheduler() {
    return Schedulers.from(executor);
}

@Override
public Scheduler getIOScheduler() {
    return Schedulers.from(executor);
}

@Override
public Scheduler getNewThreadScheduler() {
    return Schedulers.from(executor);
}
}

Then you should register this hook. Better to do this in an ServletContextListener implementation:

public class ContextListener implements ServletContextListener {

@Override
public void contextInitialized(final ServletContextEvent servletContextEvent) {
    RxJavaPlugins.getInstance().registerSchedulersHook(new RxMainThreadSchedulersHook());
}

@Override
public void contextDestroyed(final ServletContextEvent servletContextEvent) {
    // App Engine does not currently invoke this method.
}
}

It works for me.