Java Code Examples for io.atomix.protocols.raft.protocol.AppendResponse#succeeded()

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Example 1
Source File: AbstractAppender.java    From atomix with Apache License 2.0 5 votes vote down vote up 
/**
 * Handles a {@link RaftResponse.Status#OK} response.
 */
protected void handleAppendResponseOk(RaftMemberContext member, AppendRequest request, AppendResponse response) {
  // Reset the member failure count and update the member's availability status if necessary.
  succeedAttempt(member);

  // If replication succeeded then trigger commit futures.
  if (response.succeeded()) {
    updateMatchIndex(member, response);

    // If there are more entries to send then attempt to send another commit.
    if (request.prevLogIndex() != response.lastLogIndex() && hasMoreEntries(member)) {
      appendEntries(member);
    }
  }
  // If we've received a greater term, update the term and transition back to follower.
  else if (response.term() > raft.getTerm()) {
    raft.setTerm(response.term());
    raft.setLeader(null);
    raft.transition(RaftServer.Role.FOLLOWER);
  }
  // If the response failed, the follower should have provided the correct last index in their log. This helps
  // us converge on the matchIndex faster than by simply decrementing nextIndex one index at a time.
  else {
    resetMatchIndex(member, response);
    resetNextIndex(member, response);
    resetSnapshotIndex(member, response);

    // If there are more entries to send then attempt to send another commit.
    if (response.lastLogIndex() != request.prevLogIndex() && hasMoreEntries(member)) {
      appendEntries(member);
    }
  }
}
Example 2
Source File: LeaderAppender.java    From atomix with Apache License 2.0 5 votes vote down vote up 
@Override
protected void handleAppendResponseOk(RaftMemberContext member, AppendRequest request, AppendResponse response) {
  // Reset the member failure count and update the member's availability status if necessary.
  succeedAttempt(member);

  // If replication succeeded then trigger commit futures.
  if (response.succeeded()) {
    member.appendSucceeded();
    updateMatchIndex(member, response);

    // If entries were committed to the replica then check commit indexes.
    if (!request.entries().isEmpty()) {
      commitEntries();
    }

    // If there are more entries to send then attempt to send another commit.
    if (hasMoreEntries(member)) {
      appendEntries(member);
    }
  }
  // If we've received a greater term, update the term and transition back to follower.
  else if (response.term() > raft.getTerm()) {
    raft.setTerm(response.term());
    raft.setLeader(null);
    raft.transition(RaftServer.Role.FOLLOWER);
  }
  // If the response failed, the follower should have provided the correct last index in their log. This helps
  // us converge on the matchIndex faster than by simply decrementing nextIndex one index at a time.
  else {
    member.appendFailed();
    resetMatchIndex(member, response);
    resetNextIndex(member, response);
    resetSnapshotIndex(member, response);

    // If there are more entries to send then attempt to send another commit.
    if (hasMoreEntries(member)) {
      appendEntries(member);
    }
  }
}