use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.
the class FollowerTest method followerLearningAboutHigherCommitCausesValuesTobeAppliedToItsLog.
// TODO move this to outcome tests
@Test
public void followerLearningAboutHigherCommitCausesValuesTobeAppliedToItsLog() throws Exception {
// given
RaftLog entryLog = new InMemoryRaftLog();
entryLog.append(new RaftLogEntry(0, new RaftTestGroup(0)));
RaftState state = raftState().myself(myself).entryLog(entryLog).build();
Follower follower = new Follower();
appendSomeEntriesToLog(state, follower, 3, 0, 1);
// when receiving AppEntries with high leader commit (4)
Outcome outcome = follower.handle(new AppendEntries.Request(myself, 0, 3, 0, new RaftLogEntry[] { new RaftLogEntry(0, ContentGenerator.content()) }, 4), state, log());
state.update(outcome);
// then
assertEquals(4, state.commitIndex());
}
use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.
the class FollowerTest method shouldUpdateCommitIndexIfNecessary.
@Test
public void shouldUpdateCommitIndexIfNecessary() throws Exception {
// If leaderCommit > commitIndex, set commitIndex = min( leaderCommit, index of last new entry )
// given
RaftLog entryLog = new InMemoryRaftLog();
entryLog.append(new RaftLogEntry(0, new RaftTestGroup(0)));
RaftState state = raftState().myself(myself).entryLog(entryLog).build();
Follower follower = new Follower();
int localAppendIndex = 3;
int localCommitIndex = localAppendIndex - 1;
int term = 0;
// append index is 0 based
appendSomeEntriesToLog(state, follower, localAppendIndex, term, 1);
// the next when-then simply verifies that the test is setup properly, with commit and append index as expected
// when
Outcome raftTestMemberOutcome = new Outcome(FOLLOWER, state);
raftTestMemberOutcome.setCommitIndex(localCommitIndex);
state.update(raftTestMemberOutcome);
// then
assertEquals(localAppendIndex, state.entryLog().appendIndex());
assertEquals(localCommitIndex, state.commitIndex());
// when
// an append req comes in with leader commit index > localAppendIndex but localCommitIndex < localAppendIndex
Outcome outcome = follower.handle(appendEntriesRequest().leaderTerm(term).prevLogIndex(3).prevLogTerm(term).leaderCommit(localCommitIndex + 4).build(), state, log());
state.update(outcome);
// then
// The local commit index must be brought as far along as possible
assertEquals(3, state.commitIndex());
}
use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.
the class FollowerTest method shouldNotRenewElectionTimeoutOnReceiptOfHeartbeatInLowerTerm.
@Test
public void shouldNotRenewElectionTimeoutOnReceiptOfHeartbeatInLowerTerm() throws Exception {
// given
RaftState state = raftState().myself(myself).term(2).build();
Follower follower = new Follower();
Outcome outcome = follower.handle(new RaftMessages.Heartbeat(myself, 1, 1, 1), state, log());
// then
assertFalse(outcome.electionTimeoutRenewed());
}
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