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    Changes API: How to subscribe to document changes?

    Following methods allow you to subscribe to document changes:

    ForDocument

    Single document changes can be observed using forDocument method.

    Syntax

    public IObservable<DocumentChangeNotification> forDocument(String docId);
    Parameters
    docId String Id of a document for which notifications will be processed.
    Return Value
    IObservable<DocumentChangeNotification> Observable that allows to add subscriptions to notifications for given document.

    Example

    Closeable subscription = store
  .changes()
  .forDocument("employees/1")
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      switch (change.getType()) {
        case PUT:
          // do something
          break;
        case DELETE:
          // do something
          break;
        default:
          break;
      }
    }
  }));

    ForDocumentsInCollection

    To observe all document changes in particular collection use forDocumentInCollection method. This method filters documents by Raven-Entity-Name metadata property value.

    Syntax

    public IObservable<DocumentChangeNotification> forDocumentsInCollection(String collectionName);

public IObservable<DocumentChangeNotification> forDocumentsInCollection(Class<?> clazz);
    Parameters
    collectionName String Name of document collection for which notifications will be processed.
    Return Value
    IObservable<DocumentChangeNotification> Observable that allows to add subscriptions to notifications for given document collection name.

    Information

    Overload with Class uses Conventions.getTypeTagName to get collection name.

    Example

    Closeable subscription = store
  .changes()
  .forDocumentsInCollection(Employee.class)
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

    or

    String collectionName = store.getConventions().getTypeTagName(Employee.class);
Closeable subscription = store
  .changes()
  .forDocumentsInCollection(collectionName)
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

    ForDocumentsOfType

    To observe all document changes for given type use forDocumentsOfType method. This method filters documents by Raven-Clr-Type metadata property value.

    Syntax

    public IObservable<DocumentChangeNotification> forDocumentsOfType(String typeName);

public IObservable<DocumentChangeNotification> forDocumentsOfType(Class<?> clazz);
    Parameters
    typeName or clazz String or Class Name of class or class for which notifications will be processed. If default conventions are used then full type name without version information should be passed.
    Return Value
    IObservable<DocumentChangeNotification> Observable that allows to add subscriptions to notifications for given document type name.

    Information

    Overload with Class uses Conventions.findClrTypeName to get type name.

    Example

    Closeable subscription = store
  .changes()
  .forDocumentsOfType(Employee.class)
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

    or 

    String typeName = store.getConventions().getFindJavaClassName().find(Employee.class);
Closeable subscription = store
  .changes()
  .forDocumentsOfType(typeName)
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

    ForDocumentsStartingWith

    To observe all document changes for documents with Id that contains given prefix use forDocumentsStartingWith method.

    Syntax

    public IObservable<DocumentChangeNotification> forDocumentsStartingWith(String docIdPrefix);
    Parameters
    docIdPrefix String Document Id prefix for which notifications will be processed.
    Return Value
    IObservable<DocumentChangeNotification> Observable that allows to add subscriptions to notifications for given document Id prefix.

    Example

    Closeable subscription = store
  .changes()
  .forDocumentsStartingWith("employees/1") // employees/1, employees/10, employees/11, etc.
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

    ForAllDocuments

    To observe all document changes use forAllDocuments method.

    Syntax

    public IObservable<DocumentChangeNotification> forAllDocuments();
    Return Value
    IObservable<DocumentChangeNotification> Observable that allows to add subscriptions to notifications for all documents.

    Example

    Closeable subscription = store
  .changes()
  .forAllDocuments() // employees/1, orders/1, customers/1, etc.
  .subscribe(Observers.create(new Action1<DocumentChangeNotification>() {
    @Override
    public void apply(DocumentChangeNotification change) {
      System.out.println(change.getType() + " on document " + change.getId());
    }
  }));

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