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Example 56 with Outcome

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());
}
Also used : InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) RaftTestGroup(org.neo4j.causalclustering.core.consensus.membership.RaftTestGroup) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) RaftState(org.neo4j.causalclustering.core.consensus.state.RaftState) AppendEntries(org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) RaftLogEntry(org.neo4j.causalclustering.core.consensus.log.RaftLogEntry) Test(org.junit.Test)

Example 57 with Outcome

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());
}
Also used : InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) RaftTestGroup(org.neo4j.causalclustering.core.consensus.membership.RaftTestGroup) Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) RaftState(org.neo4j.causalclustering.core.consensus.state.RaftState) InMemoryRaftLog(org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog) RaftLog(org.neo4j.causalclustering.core.consensus.log.RaftLog) RaftLogEntry(org.neo4j.causalclustering.core.consensus.log.RaftLogEntry) Test(org.junit.Test)

Example 58 with Outcome

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());
}
Also used : Outcome(org.neo4j.causalclustering.core.consensus.outcome.Outcome) RaftState(org.neo4j.causalclustering.core.consensus.state.RaftState) RaftMessages(org.neo4j.causalclustering.core.consensus.RaftMessages) Test(org.junit.Test)

Aggregations

Outcome (org.neo4j.causalclustering.core.consensus.outcome.Outcome)58 Test (org.junit.Test)53 RaftState (org.neo4j.causalclustering.core.consensus.state.RaftState)42 RaftLogEntry (org.neo4j.causalclustering.core.consensus.log.RaftLogEntry)27 InMemoryRaftLog (org.neo4j.causalclustering.core.consensus.log.InMemoryRaftLog)24 ReadableRaftState (org.neo4j.causalclustering.core.consensus.state.ReadableRaftState)19 RaftMessages (org.neo4j.causalclustering.core.consensus.RaftMessages)15 AppendEntries (org.neo4j.causalclustering.core.consensus.RaftMessages.AppendEntries)11 RaftLog (org.neo4j.causalclustering.core.consensus.log.RaftLog)11 ReadableRaftLog (org.neo4j.causalclustering.core.consensus.log.ReadableRaftLog)9 FollowerState (org.neo4j.causalclustering.core.consensus.roles.follower.FollowerState)6 FollowerStates (org.neo4j.causalclustering.core.consensus.roles.follower.FollowerStates)6 Log (org.neo4j.logging.Log)6 BatchAppendLogEntries (org.neo4j.causalclustering.core.consensus.outcome.BatchAppendLogEntries)5 ShipCommand (org.neo4j.causalclustering.core.consensus.outcome.ShipCommand)5 MemberId (org.neo4j.causalclustering.identity.MemberId)5 RaftTestGroup (org.neo4j.causalclustering.core.consensus.membership.RaftTestGroup)4 AppendLogEntry (org.neo4j.causalclustering.core.consensus.outcome.AppendLogEntry)4 ReplicatedString (org.neo4j.causalclustering.core.consensus.ReplicatedString)3 TruncateLogCommand (org.neo4j.causalclustering.core.consensus.outcome.TruncateLogCommand)3