Examples with RaftLogEntry org.neo4j.causalclustering.core.consensus.log.RaftLogEntry used on opensource projects

Example 61 with RaftLogEntry

use of org.neo4j.causalclustering.core.consensus.log.RaftLogEntry in project neo4j by neo4j.

the class AppendEntriesRequestTest method shouldNotCommitAheadOfMatchingHistory.

@Test
public void shouldNotCommitAheadOfMatchingHistory() throws Exception {
    // given
    InMemoryRaftLog raftLog = new InMemoryRaftLog();
    RaftState state = raftState().entryLog(raftLog).myself(myself).build();
    long leaderTerm = state.term() + leaderTermDifference;
    RaftLogEntry previouslyAppendedEntry = new RaftLogEntry(leaderTerm, content());
    raftLog.append(previouslyAppendedEntry);
    // when
    Outcome outcome = role.handler.handle(appendEntriesRequest().from(leader).leaderTerm(leaderTerm).prevLogIndex(raftLog.appendIndex() + 1).prevLogTerm(leaderTerm).leaderCommit(0).build(), state, log());
    // then
    assertFalse(((Response) messageFor(outcome, leader)).success());
    assertThat(outcome.getLogCommands(), empty());
}

Example 62 with RaftLogEntry

use of org.neo4j.causalclustering.core.consensus.log.RaftLogEntry in project neo4j by neo4j.

the class AppendEntriesRequestTest method shouldAppendNewEntryAndCommitPreviouslyAppendedEntry.

@Test
public void shouldAppendNewEntryAndCommitPreviouslyAppendedEntry() throws Exception {
    // given
    InMemoryRaftLog raftLog = new InMemoryRaftLog();
    RaftState state = raftState().entryLog(raftLog).myself(myself).build();
    long leaderTerm = state.term() + leaderTermDifference;
    RaftLogEntry previouslyAppendedEntry = new RaftLogEntry(leaderTerm, content());
    raftLog.append(previouslyAppendedEntry);
    RaftLogEntry newLogEntry = new RaftLogEntry(leaderTerm, content());
    // when
    Outcome outcome = role.handler.handle(appendEntriesRequest().from(leader).leaderTerm(leaderTerm).prevLogIndex(raftLog.appendIndex()).prevLogTerm(leaderTerm).logEntry(newLogEntry).leaderCommit(0).build(), state, log());
    // then
    assertTrue(((Response) messageFor(outcome, leader)).success());
    assertThat(outcome.getCommitIndex(), Matchers.equalTo(0L));
    assertThat(outcome.getLogCommands(), hasItem(new BatchAppendLogEntries(1, 0, new RaftLogEntry[] { newLogEntry })));
}

Example 63 with RaftLogEntry

use of org.neo4j.causalclustering.core.consensus.log.RaftLogEntry in project neo4j by neo4j.

the class AppendEntriesRequestTest method shouldCommitEntry.

@Test
public void shouldCommitEntry() throws Exception {
    // given
    InMemoryRaftLog raftLog = new InMemoryRaftLog();
    RaftState state = raftState().entryLog(raftLog).myself(myself).build();
    long leaderTerm = state.term() + leaderTermDifference;
    raftLog.append(new RaftLogEntry(leaderTerm, content()));
    // when
    Outcome outcome = role.handler.handle(appendEntriesRequest().from(leader).leaderTerm(leaderTerm).prevLogIndex(raftLog.appendIndex()).prevLogTerm(leaderTerm).leaderCommit(0).build(), state, log());
    // then
    assertTrue(((Response) messageFor(outcome, leader)).success());
    assertThat(outcome.getCommitIndex(), Matchers.equalTo(0L));
}

Example 64 with RaftLogEntry

use of org.neo4j.causalclustering.core.consensus.log.RaftLogEntry in project neo4j by neo4j.

the class AppendingTest method shouldPerformTruncation.

@Test
public void shouldPerformTruncation() throws Exception {
    // when
    // we have a log appended up to appendIndex, and committed somewhere before that
    long appendIndex = 5;
    long localTermForAllEntries = 1L;
    Outcome outcome = mock(Outcome.class);
    ReadableRaftLog logMock = mock(ReadableRaftLog.class);
    // for simplicity, all entries are at term 1
    when(logMock.readEntryTerm(anyLong())).thenReturn(localTermForAllEntries);
    when(logMock.appendIndex()).thenReturn(appendIndex);
    ReadableRaftState state = mock(ReadableRaftState.class);
    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 RaftMessages.AppendEntries.Request(aMember, localTermForAllEntries, appendIndex - 2, localTermForAllEntries, new RaftLogEntry[] { new RaftLogEntry(localTermForAllEntries + 1, ReplicatedInteger.valueOf(2)) }, appendIndex + 3), NullLog.getInstance());
    // then
    // we must produce a TruncateLogCommand at the earliest mismatching index
    verify(outcome, times(1)).addLogCommand(argThat(new LogCommandMatcher(appendIndex - 1)));
}

Example 65 with RaftLogEntry

use of org.neo4j.causalclustering.core.consensus.log.RaftLogEntry in project neo4j by neo4j.

the class AppendingTest method shouldNotAllowTruncationBeforeCommit.

@Test
public void shouldNotAllowTruncationBeforeCommit() throws Exception {
    // given
    long commitIndex = 5;
    long localTermForAllEntries = 1L;
    Outcome outcome = mock(Outcome.class);
    ReadableRaftLog logMock = mock(ReadableRaftLog.class);
    // for simplicity, all entries are at term 1
    when(logMock.readEntryTerm(anyLong())).thenReturn(localTermForAllEntries);
    when(logMock.appendIndex()).thenReturn(commitIndex);
    ReadableRaftState state = mock(ReadableRaftState.class);
    when(state.entryLog()).thenReturn(logMock);
    when(state.commitIndex()).thenReturn(commitIndex);
    // when - then
    try {
        Appending.handleAppendEntriesRequest(state, outcome, new RaftMessages.AppendEntries.Request(aMember, localTermForAllEntries, commitIndex - 2, localTermForAllEntries, new RaftLogEntry[] { new RaftLogEntry(localTermForAllEntries + 1, ReplicatedInteger.valueOf(2)) }, commitIndex + 3), NullLog.getInstance());
        fail("Appending should not allow truncation at or before the commit index");
    } catch (IllegalStateException expected) {
    // fine
    }
}