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    Changes API: How to subscribe to index changes?

    Following methods allow you to subscribe to index changes:

    ForIndex

    Index changes for one index can be observed using forIndex method.

    Syntax

    public IObservable<IndexChangeNotification> forIndex(String indexName);
    Parameters
    indexName String Name of an index for which notifications will be processed.
    Return value
    IObservable<IndexChangeNotification> Observable that allows to add subscriptions to notifications for index with given name.

    Example

    Closeable subscription = store.
   changes().
   forIndex("Orders/All")
   .subscribe(Observers.create(new Action1<IndexChangeNotification>() {
    @Override
    public void apply(IndexChangeNotification change) {
      switch (change.getType()) {
        case INDEX_ADDED:
          // do something
          break;
        case INDEX_DEMOTED_TO_ABANDONED:
          // do something
          break;
        case INDEX_DEMOTED_TO_DISABLED:
          // do something
          break;
        case INDEX_DEMOTED_TO_IDLE:
          // do something
          break;
        case INDEX_MARKED_AS_ERRORED:
          // do something
          break;
        case INDEX_PROMOTED_FROM_IDLE:
          // do something
          break;
        case INDEX_REMOVED:
          // do something
          break;
        case MAP_COMPLETED:
          // do something
          break;
        case REDUCE_COMPLETED:
          // do something
          break;
        case REMOVE_FROM_INDEX:
          // do something
          break;
        default:
          break;
      }
    }
  }));

    ForAllIndexes

    Index changes for all indexes can be observed using forAllIndexes method.

    Return value
    IObservable<IndexChangeNotification> Observable that allows to add subscriptions to notifications for all indexes.

    Syntax

    public IObservable<IndexChangeNotification> forAllIndexes();

    Example

    Closeable subscription = store.
  changes().
  forAllIndexes()
  .subscribe(Observers.create(new Action1<IndexChangeNotification>() {
   @Override
   public void apply(IndexChangeNotification change) {
     System.out.println(change.getType() + " on index " + change.getName());
   }
 }));

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