Class AckExtension

java.lang.Object
org.cometd.client.ext.AckExtension
All Implemented Interfaces:
org.cometd.bayeux.client.ClientSession.Extension
public class AckExtension extends Object implements org.cometd.bayeux.client.ClientSession.Extension

This client-side extension enables the client to acknowledge to the server the messages that the client has received.

For the acknowledgement to work, the server must be configured with the correspondent server-side ack extension. If both client and server support the ack extension, then the ack functionality will take place automatically. By enabling this extension, all messages arriving from the server will arrive via the long poll, so the comet communication will be slightly chattier. The fact that all messages will return via long poll means also that the messages will arrive with total order, which is not guaranteed if messages can arrive via both long poll and normal response. Messages are not acknowledged one by one, but instead a group of messages is acknowledged when long poll returns.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    ACK_FIELD
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    AckExtension()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    rcvMeta(org.cometd.bayeux.client.ClientSession session, org.cometd.bayeux.Message.Mutable message)
     
    boolean
    sendMeta(org.cometd.bayeux.client.ClientSession session, org.cometd.bayeux.Message.Mutable message)
     

    Methods inherited from class Object

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

    Methods inherited from interface org.cometd.bayeux.client.ClientSession.Extension

    incoming, outgoing, rcv, send

  • Field Details

  • Constructor Details

    • AckExtension

      public AckExtension()

  • Method Details

    • rcvMeta

      public boolean rcvMeta(org.cometd.bayeux.client.ClientSession session, org.cometd.bayeux.Message.Mutable message)
      Specified by:
      rcvMeta in interface org.cometd.bayeux.client.ClientSession.Extension

    • sendMeta

      public boolean sendMeta(org.cometd.bayeux.client.ClientSession session, org.cometd.bayeux.Message.Mutable message)
      Specified by:
      sendMeta in interface org.cometd.bayeux.client.ClientSession.Extension