TIPC Service and Topology Tracking4

• Service Tracking

  1、 Users can subscribe to the contents and changes of the global address binding table .
  2、 Every time you change , They will all receive an event that matches the range indicated in the subscription .
  3、 binding / There is a match when the unbound instance or scope overlaps with the subscribed scope .
  4、 The received event contains bindings / Unbound socket service address and socket address .
  

• Cluster Topology Tracking

  1、 Cluster topology tracking is a special case of service tracking , It is also based on the content of the binding table
  2、 Peer node availability （ From your own node ） By built-in service type 0 Express .
  3、 By using built-in service types 2 Subscribe to the availability of a single link , You can also perform cluster connection tracking .
  4、 Use these mechanisms , And through the topology server connected to other cluster nodes , Users can build and track the overall connection matrix of the entire cluster .
  

• Group Membership Tracking

  1、 Communication group members can choose to subscribe to other group members join/leave/close//crash/lost contact event .
  2、 Membership events are received in the member socket in the form of out of band messages .
  3、 Ensure the sequence of events ,- The join event always arrives before the first message of the new member ,- The leaving event always arrives after the last message of the leaving member .