Class TwoPhaseVotingAdapter


  • public class TwoPhaseVotingAdapter
    extends java.lang.Object
    This adapter introduces simple two-phase voting on a specified decree. All nodes in the group receive a decree in "prepare" phase where they expres their opinion on the decree. If all nodes voted positively on decree, next phase "commit" fixes changes that were made in "prepare" phase, otherwise changes are canceled in "abort" phase.
    Version:
    $Id: TwoPhaseVotingAdapter.java,v 1.4 2005/06/08 15:56:54 publicnmi Exp $
    Author:
    Roman Rokytskyy (rrokytskyy@acm.org), Robert Schaffar-Taurok (robert@fusion.at)
    • Constructor Detail

      • TwoPhaseVotingAdapter

        public TwoPhaseVotingAdapter​(VotingAdapter voteChannel)
        Creats an instance of the class.
        Parameters:
        voteChannel - the channel that will be used for voting.
    • Method Detail

      • addListener

        public void addListener​(TwoPhaseVotingListener listener)
        Wraps actual listener with the VoteChannelListener and adds to the voteChannel
      • removeListener

        public void removeListener​(TwoPhaseVotingListener listener)
        Removes the listener from the voteChannel
      • vote

        public boolean vote​(java.lang.Object decree,
                            long timeout)
                     throws ChannelException
        Performs the two-phase voting on the decree. After the voting each group member remains in the same state as others.
        Throws:
        ChannelException
      • vote

        public boolean vote​(java.lang.Object decree,
                            long timeout,
                            VoteResponseProcessor voteResponseProcessor)
                     throws ChannelException
        Performs the two-phase voting on the decree. After the voting each group member remains in the same state as others.
        Throws:
        ChannelException
      • getVoteChannel

        public VotingAdapter getVoteChannel()
        Returns:
        Returns the voteChannel.