//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldPerformTruncation() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldPerformTruncation()
{
// when
// we have a log appended up to appendIndex, and committed somewhere before that
long appendIndex = 5;
long localTermForAllEntries = 1L;
Outcome outcome = mock(typeof(Outcome));
ReadableRaftLog logMock = mock(typeof(ReadableRaftLog));
when(logMock.ReadEntryTerm(anyLong())).thenReturn(localTermForAllEntries); // for simplicity, all entries are at term 1
when(logMock.AppendIndex()).thenReturn(appendIndex);
ReadableRaftState state = mock(typeof(ReadableRaftState));
when(state.EntryLog()).thenReturn(logMock);
when(state.CommitIndex()).thenReturn(appendIndex - 3);
// when
// the leader asks to append after the commit index an entry that mismatches on term
Appending.HandleAppendEntriesRequest(state, outcome, new Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request(_aMember, localTermForAllEntries, appendIndex - 2, localTermForAllEntries, new RaftLogEntry[] { new RaftLogEntry(localTermForAllEntries + 1, ReplicatedInteger.valueOf(2)) }, appendIndex + 3), NullLog.Instance);
// then
// we must produce a TruncateLogCommand at the earliest mismatching index
verify(outcome, times(1)).addLogCommand(argThat(new LogCommandMatcher(appendIndex - 1)));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldNotAllowTruncationAtCommit() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldNotAllowTruncationAtCommit()
{
// given
long commitIndex = 5;
long localTermForAllEntries = 1L;
Outcome outcome = mock(typeof(Outcome));
ReadableRaftLog logMock = mock(typeof(ReadableRaftLog));
when(logMock.ReadEntryTerm(anyLong())).thenReturn(localTermForAllEntries); // for simplicity, all entries are at term 1
when(logMock.AppendIndex()).thenReturn(commitIndex);
ReadableRaftState state = mock(typeof(ReadableRaftState));
when(state.EntryLog()).thenReturn(logMock);
when(state.CommitIndex()).thenReturn(commitIndex);
// when - then
try
{
Appending.HandleAppendEntriesRequest(state, outcome, new Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request(_aMember, localTermForAllEntries, commitIndex - 1, localTermForAllEntries, new RaftLogEntry[] { new RaftLogEntry(localTermForAllEntries + 1, ReplicatedInteger.valueOf(2)) }, commitIndex + 3), NullLog.Instance);
fail("Appending should not allow truncation at or before the commit index");
}
catch (System.InvalidOperationException)
{
// ok
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_Vote_Response res) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_Vote_Response res)
{
if (res.Term() > Ctx.term())
{
Outcome.NextTerm = res.Term();
Outcome.NextRole = FOLLOWER;
Log.info("Moving to FOLLOWER state after receiving vote response from %s at term %d (I am at %d)", res.From(), res.Term(), Ctx.term());
return(Outcome);
}
else if (res.Term() < Ctx.term() || !res.VoteGranted())
{
return(Outcome);
}
if (!res.From().Equals(Ctx.myself()))
{
Outcome.addVoteForMe(res.From());
}
if (isQuorum(Ctx.votingMembers(), Outcome.VotesForMe))
{
Outcome.Leader = Ctx.myself();
Appending.AppendNewEntry(Ctx, Outcome, new NewLeaderBarrier());
Leader.SendHeartbeats(Ctx, Outcome);
Outcome.LastLogIndexBeforeWeBecameLeader = Ctx.entryLog().appendIndex();
Outcome.electedLeader();
Outcome.renewElectionTimeout();
Outcome.NextRole = LEADER;
Log.info("Moving to LEADER state at term %d (I am %s), voted for by %s", Ctx.term(), Ctx.myself(), Outcome.VotesForMe);
}
return(Outcome);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldNotAttemptToTruncateAtIndexBeforeTheLogPrevIndex() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldNotAttemptToTruncateAtIndexBeforeTheLogPrevIndex()
{
// given
// a log with prevIndex and prevTerm set
ReadableRaftLog logMock = mock(typeof(ReadableRaftLog));
long prevIndex = 5;
long prevTerm = 5;
when(logMock.PrevIndex()).thenReturn(prevIndex);
when(logMock.ReadEntryTerm(prevIndex)).thenReturn(prevTerm);
// and which also properly returns -1 as the term for an unknown entry, in this case prevIndex - 2
when(logMock.ReadEntryTerm(prevIndex - 2)).thenReturn(-1L);
// also, a state with a given commitIndex, obviously ahead of prevIndex
long commitIndex = 10;
ReadableRaftState state = mock(typeof(ReadableRaftState));
when(state.EntryLog()).thenReturn(logMock);
when(state.CommitIndex()).thenReturn(commitIndex);
// which is also the append index
when(logMock.AppendIndex()).thenReturn(commitIndex);
// when
// an appendEntriesRequest arrives for appending entries before the prevIndex (for whatever reason)
Outcome outcome = mock(typeof(Outcome));
Appending.HandleAppendEntriesRequest(state, outcome, new Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request(_aMember, prevTerm, prevIndex - 2, prevTerm, new RaftLogEntry[] { new RaftLogEntry(prevTerm, ReplicatedInteger.valueOf(2)) }, commitIndex + 3), NullLog.Instance);
// then
// there should be no truncate commands. Actually, the whole thing should be a no op
verify(outcome, never()).addLogCommand(any());
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_NewEntry_BatchRequest req) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_NewEntry_BatchRequest req)
{
ICollection <ReplicatedContent> contents = req.Contents();
Appending.AppendNewEntries(Ctx, Outcome, contents);
return(Outcome);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_NewEntry_Request req) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_NewEntry_Request req)
{
ReplicatedContent content = req.Content();
Appending.AppendNewEntry(Ctx, Outcome, content);
return(Outcome);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request req) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request req)
{
if (req.LeaderTerm() < Ctx.term())
{
Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Response appendResponse = new Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Response(Ctx.myself(), Ctx.term(), false, req.PrevLogIndex(), Ctx.entryLog().appendIndex());
Outcome.addOutgoingMessage(new Org.Neo4j.causalclustering.core.consensus.RaftMessages_Directed(req.From(), appendResponse));
return(Outcome);
}
Outcome.NextRole = FOLLOWER;
Log.info("Moving to FOLLOWER state after receiving append entries request from %s at term %d (I am at %d)n", req.From(), req.LeaderTerm(), Ctx.term());
Appending.HandleAppendEntriesRequest(Ctx, Outcome, req, Log);
return(Outcome);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request req) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request req)
{
if (req.LeaderTerm() < Ctx.term())
{
Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Response appendResponse = new Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Response(Ctx.myself(), Ctx.term(), false, -1, Ctx.entryLog().appendIndex());
Outcome.addOutgoingMessage(new Org.Neo4j.causalclustering.core.consensus.RaftMessages_Directed(req.From(), appendResponse));
return(Outcome);
}
else if (req.LeaderTerm() == Ctx.term())
{
throw new System.InvalidOperationException("Two leaders in the same term.");
}
else
{
// There is a new leader in a later term, we should revert to follower. (ยง5.1)
StepDownToFollower(Outcome, Ctx);
Log.info("Moving to FOLLOWER state after receiving append request at term %d (my term is " + "%d) from %s", req.LeaderTerm(), Ctx.term(), req.From());
Appending.HandleAppendEntriesRequest(Ctx, Outcome, req, Log);
return(Outcome);
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public org.neo4j.causalclustering.core.consensus.outcome.Outcome handle(org.neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request request) throws java.io.IOException
public override Outcome Handle(Org.Neo4j.causalclustering.core.consensus.RaftMessages_AppendEntries_Request request)
{
Appending.HandleAppendEntriesRequest(Ctx, Outcome, request, Log);
return(Outcome);
}
