public void testAppendOnNonEmptyLog() throws Throwable {
runOnServer(
() -> {
serverContext.setTerm(1);
append(1, 1);
AppendRequest request =
AppendRequest.builder()
.withTerm(1)
.withLeader(
serverContext
.getClusterState()
.getActiveMemberStates()
.iterator()
.next()
.getMember()
.id())
.withLogIndex(0)
.withLogTerm(0)
.withCommitIndex(2)
.withGlobalIndex(0)
.withEntries(new TestEntry().setIndex(2).setTerm(1))
.build();
AppendResponse response = state.append(request).get();
assertEquals(response.status(), Status.OK);
assertTrue(response.succeeded());
assertEquals(response.term(), 1L);
assertEquals(response.logIndex(), 2L);
assertEquals(serverContext.getLog().length(), 2L);
assertNotNull(get(2));
});
}
public void testCandidateRejectsVoteAndTransitionsOnTerm() throws Throwable {
runOnServer(
() -> {
int candidate =
serverState.getCluster().getActiveMembers().iterator().next().getAddress().hashCode();
serverState.setTerm(1);
append(2, 1);
state.startElection();
assertEquals(serverState.getTerm(), 2L);
VoteRequest request =
VoteRequest.builder()
.withTerm(3)
.withCandidate(candidate)
.withLogTerm(0)
.withLogIndex(0)
.build();
VoteResponse response = state.vote(request).get();
assertEquals(response.status(), Response.Status.OK);
assertFalse(response.voted());
assertEquals(serverState.getTerm(), 3L);
assertEquals(serverState.getLastVotedFor(), 0);
assertEquals(response.term(), 3L);
assertEquals(serverState.getState(), RaftServer.State.FOLLOWER);
});
}
@SuppressWarnings("unchecked")
public void testRejectAppendOnTerm() throws Throwable {
runOnServer(
() -> {
serverContext.setTerm(2);
append(2, 2);
AppendRequest request =
AppendRequest.builder()
.withTerm(1)
.withLeader(
serverContext
.getClusterState()
.getActiveMemberStates()
.iterator()
.next()
.getMember()
.id())
.withEntries(Collections.EMPTY_LIST)
.withLogIndex(2)
.withLogTerm(2)
.withCommitIndex(0)
.withGlobalIndex(0)
.build();
AppendResponse response = state.append(request).get();
assertEquals(response.status(), Status.OK);
assertFalse(response.succeeded());
assertEquals(response.term(), 2L);
assertEquals(response.logIndex(), 2L);
});
}