com.google.api.client.googleapis.notifications

Class TypedNotificationCallback<T>

java.lang.Object

com.google.api.client.googleapis.notifications.TypedNotificationCallback<T>

Type Parameters:

T - Java type of the notification content

All Implemented Interfaces:

UnparsedNotificationCallback, Serializable

Direct Known Subclasses:

JsonNotificationCallback

@Beta
public abstract class TypedNotificationCallback<T>
extends Object
implements UnparsedNotificationCallback

Beta
Callback to receive notifications for watched resource in which the . Callback which is used to receive typed AbstractNotifications after subscribing to a topic.

Must NOT be implemented in form of an anonymous class as this will break serialization.

Implementation should be thread-safe.

Example usage:

  static class MyNotificationCallback
      extends JsonNotificationCallback<ListResponse> {

    private static final long serialVersionUID = 1L;

    @Override
    protected void onNotification(
        StoredChannel subscription, Notification notification, ListResponse content) {
      switch (notification.getResourceState()) {
        case ResourceStates.SYNC:
          break;
        case ResourceStates.EXISTS:
          break;
        case ResourceStates.NOT_EXISTS:
          break;
      }
    }

    @Override
    protected ObjectParser getObjectParser(Notification notification) throws IOException {
      return new JsonObjectParser(new JacksonFactory());
    }

    @Override
    protected Class<ListResponse> getDataClass() throws IOException {
      return ListResponse.class;
    }
  }
 

Since:

1.16

Author:

Yaniv Inbar, Matthias Linder (mlinder)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TypedNotificationCallback()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract Class<T>	getDataClass() Returns the data class to parse the notification content into or Void.class if no notification content is expected.
protected abstract com.google.api.client.util.ObjectParser	getObjectParser() Returns an ObjectParser which can be used to parse this notification.
protected abstract void	onNotification(StoredChannel storedChannel, TypedNotification<T> notification) Handles a received typed notification.
void	onNotification(StoredChannel storedChannel, UnparsedNotification notification) Handles a received unparsed notification.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TypedNotificationCallback

public TypedNotificationCallback()

Method Detail

onNotification

protected abstract void onNotification(StoredChannel storedChannel,
                  TypedNotification<T> notification)
                                throws IOException

Handles a received typed notification.

Parameters:

storedChannel - stored notification channel

notification - typed notification

Throws:

IOException

getObjectParser

protected abstract com.google.api.client.util.ObjectParser getObjectParser()
                                                                    throws IOException

Returns an ObjectParser which can be used to parse this notification.

Throws:

IOException

getDataClass

protected abstract Class<T> getDataClass()
                                  throws IOException

Returns the data class to parse the notification content into or Void.class if no notification content is expected.

Throws:

IOException

onNotification

public final void onNotification(StoredChannel storedChannel,
                  UnparsedNotification notification)
                          throws IOException

Description copied from interface: UnparsedNotificationCallback

Handles a received unparsed notification.

Specified by:

onNotification in interface UnparsedNotificationCallback

Parameters:

storedChannel - stored notification channel

notification - unparsed notification

Throws:

IOException