public async Task <AppendEntriesResponse> Handle(AppendEntries appendEntries)
{
try
{
await _appendingEntries.WaitAsync();
var response = _rules.AppendEntriesTermIsLessThanCurrentTerm(appendEntries, CurrentState);
if (response.shouldReturn)
{
return(response.appendEntriesResponse);
}
response =
await _rules.LogDoesntContainEntryAtPreviousLogIndexWhoseTermMatchesPreviousLogTerm(appendEntries,
_log, CurrentState);
if (response.shouldReturn)
{
return(response.appendEntriesResponse);
}
await _rules.DeleteAnyConflictsInLog(appendEntries, _log);
var terms = appendEntries.Entries.Any()
? string.Join(",", appendEntries.Entries.Select(x => x.Term))
: string.Empty;
_logger.LogInformation(
$"{CurrentState.Id} as {nameof(Follower)} applying {appendEntries.Entries.Count} to log, term {terms}");
await _rules.ApplyNewEntriesToLog(appendEntries, _log);
var commitIndexAndLastApplied =
await _rules.CommitIndexAndLastApplied(appendEntries, _log, CurrentState);
await ApplyToStateMachine(commitIndexAndLastApplied.commitIndex, commitIndexAndLastApplied.lastApplied,
appendEntries);
SetLeaderId(appendEntries);
_messagesSinceLastElectionExpiry++;
return(new AppendEntriesResponse(CurrentState.CurrentTerm, true));
}
finally
{
_appendingEntries.Release();
}
}
public async Task <AppendEntriesResponse> Handle(AppendEntries appendEntries)
{
var response = _rules.AppendEntriesTermIsLessThanCurrentTerm(appendEntries, CurrentState);
if (response.shouldReturn)
{
return(response.appendEntriesResponse);
}
response = await _rules.LogDoesntContainEntryAtPreviousLogIndexWhoseTermMatchesPreviousLogTerm(appendEntries, _log, CurrentState);
if (response.shouldReturn)
{
return(response.appendEntriesResponse);
}
await _rules.DeleteAnyConflictsInLog(appendEntries, _log);
if (_applied > 1 && appendEntries.Entries.Any())
{
Console.WriteLine("WTF?");
}
_applied++;
_logger.LogInformation($"{CurrentState.Id} as {nameof(Candidate)} applying entry to log");
await _rules.ApplyNewEntriesToLog(appendEntries, _log);
var commitIndexAndLastApplied = await _rules.CommitIndexAndLastApplied(appendEntries, _log, CurrentState);
await ApplyToStateMachine(commitIndexAndLastApplied.commitIndex, commitIndexAndLastApplied.lastApplied);
SetLeaderId(appendEntries);
AppendEntriesTermIsGreaterThanCurrentTerm(appendEntries);
return(new AppendEntriesResponse(CurrentState.CurrentTerm, true));
}