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## Package com.google.appengine.api.channel

Provides persistent connectivity to JavaScript clients for real time messaging without the use of polling.

See:
Description

Interface Summary
ChannelService | `ChannelService` allows you to manage manage two-way connections with clients.

Class Summary
ChannelMessage | Class that represents a channel message.
ChannelPresence | Represents presence information returned by the server.
ChannelServiceFactory | Constructs and instance of the Channel service.

Exception Summary
ChannelFailureException | `ChannelFailureException` is an unchecked exception that is thrown for any unexpected error that occurs while communicating with the channel service.

## Package com.google.appengine.api.channel Description

Provides persistent connectivity to JavaScript clients for real time messaging without the use of polling.

See Also:
  `ChannelService`, The Channel Java API in the Google App Engine Developer's Guide.

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