How to use

forInterest

method

in

com.netflix.eureka2.interests.IndexRegistry

@Override
public Observable<ChangeNotification<T>> forInterest(Interest<T> interest,
                           Observable<ChangeNotification<T>> dataSource,
                           InitStateHolder<T> initStateHolder) {
  return mergeWithBatchRegistryHints(interest, delegateRegistry.forInterest(interest, dataSource, initStateHolder));
}

/**
 * Return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 * @param interest
 * @return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 */
@Override
public Observable<ChangeNotification<InstanceInfo>> forInterest(Interest<InstanceInfo> interest) {
  try {
    // TODO: this method can be run concurrently from different channels, unless we run everything on single server event loop.
    // It is possible that the same instance info will be both in snapshot and paused notification queue.
    notificationSubject.pause(); // Pause notifications till we get a snapshot of current registry (registry.values())
    if (interest instanceof MultipleInterests) {
      return indexRegistry.forCompositeInterest((MultipleInterests) interest, this);
    } else {
      return indexRegistry.forInterest(interest, notificationSubject,
          new InstanceInfoInitStateHolder(getSnapshotForInterest(interest)));
    }
  } finally {
    notificationSubject.resume();
  }
}

/**
 * Return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 * @param interest
 * @return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 */
@Override
public Observable<ChangeNotification<InstanceInfo>> forInterest(Interest<InstanceInfo> interest) {
  try {
    // TODO: this method can be run concurrently from different channels, unless we run everything on single server event loop.
    notificationSubject.pause(); // Pause notifications till we get a snapshot of current registry (registry.values())
    if (interest instanceof MultipleInterests) {
      return indexRegistry.forCompositeInterest((MultipleInterests) interest, this);
    } else {
      return indexRegistry.forInterest(interest, notificationSubject,
          new InstanceInfoInitStateHolder(getSnapshotForInterest(interest)));
    }
  } finally {
    notificationSubject.resume();
  }
}

/**
 * Return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 * @param interest
 * @return an observable of all matching InstanceInfo for the current registry snapshot,
 * as {@link ChangeNotification}s
 */
@Override
public Observable<ChangeNotification<InstanceInfo>> forInterest(Interest<InstanceInfo> interest) {
  try {
    // TODO: this method can be run concurrently from different channels, unless we run everything on single server event loop.
    // It is possible that the same instanceinfo will be both in snapshot and paused notification queue.
    pauseableSubject.pause(); // Pause notifications till we get a snapshot of current registry (registry.values())
    if (interest instanceof MultipleInterests) {
      return indexRegistry.forCompositeInterest((MultipleInterests) interest, this);
    } else {
      return indexRegistry.forInterest(interest, pauseableSubject,
          new InstanceInfoInitStateHolder(getSnapshotForInterest(interest), interest));
    }
  } finally {
    pauseableSubject.resume();
  }
}