MembershipListener (Apache Tomcat 9.0.37 API Documentation)

org.apache.catalina.tribes

## Interface MembershipListener

- All Known Subinterfaces:
    ChannelInterceptor
  All Known Implementing Classes:
    AbstractReplicatedMap, ChannelCoordinator, ChannelInterceptorBase, CloudMembershipService, DomainFilterInterceptor, EncryptInterceptor, FragmentationInterceptor, GroupChannel, GzipInterceptor, LazyReplicatedMap, McastService, MembershipServiceBase, MessageDispatchInterceptor, NonBlockingCoordinator, OrderInterceptor, ReplicatedMap, SimpleCoordinator, SimpleTcpCluster, StaticMembershipInterceptor, StaticMembershipService, TcpFailureDetector, TcpPingInterceptor, ThroughputInterceptor, TwoPhaseCommitInterceptor

      public interface MembershipListener

  The MembershipListener interface is used as a callback to the membership service. It has two methods that will notify the listener when a member has joined the group and when a member has disappeared (crashed)

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `memberAdded(Member member)` A member was added to the group
    `void` | `memberDisappeared(Member member)` A member was removed from the group If the member left voluntarily, the Member.getCommand will contain the Member.SHUTDOWN_PAYLOAD data

- - ### Method Detail

    - #### memberAdded

          void memberAdded(Member member)

      A member was added to the group
      Parameters:
        `member` - Member - the member that was added

    - #### memberDisappeared

          void memberDisappeared(Member member)

      A member was removed from the group
      If the member left voluntarily, the Member.getCommand will contain the Member.SHUTDOWN_PAYLOAD data
      Parameters:
        `member` - Member
      See Also:
        `Member.SHUTDOWN_PAYLOAD`

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