+ @Test
+ public void testSendSnapshotfromInstallSnapshotReply() throws Exception {
+ new JavaTestKit(getSystem()) {{
+
+ TestActorRef<MessageCollectorActor> followerActor =
+ TestActorRef.create(getSystem(), Props.create(MessageCollectorActor.class), "follower-reply");
+
+ Map<String, String> peerAddresses = new HashMap<>();
+ peerAddresses.put("follower-reply",
+ followerActor.path().toString());
+
+ final int followersLastIndex = 2;
+ final int snapshotIndex = 3;
+ final int snapshotTerm = 1;
+ final int currentTerm = 2;
+
+ MockRaftActorContext actorContext =
+ (MockRaftActorContext) createActorContext();
+ DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl(){
+ @Override
+ public int getSnapshotChunkSize() {
+ return 50;
+ }
+ };
+ configParams.setHeartBeatInterval(new FiniteDuration(9, TimeUnit.SECONDS));
+ configParams.setIsolatedLeaderCheckInterval(new FiniteDuration(10, TimeUnit.SECONDS));
+
+ actorContext.setConfigParams(configParams);
+ actorContext.setPeerAddresses(peerAddresses);
+ actorContext.setCommitIndex(followersLastIndex);
+
+ MockLeader leader = new MockLeader(actorContext);
+
+ Map<String, String> leadersSnapshot = new HashMap<>();
+ leadersSnapshot.put("1", "A");
+ leadersSnapshot.put("2", "B");
+ leadersSnapshot.put("3", "C");
+
+ // set the snapshot variables in replicatedlog
+ actorContext.getReplicatedLog().setSnapshotIndex(snapshotIndex);
+ actorContext.getReplicatedLog().setSnapshotTerm(snapshotTerm);
+ actorContext.getTermInformation().update(currentTerm, leaderActor.path().toString());
+
+ ByteString bs = toByteString(leadersSnapshot);
+ leader.setSnapshot(Optional.of(bs));
+
+ leader.handleMessage(leaderActor, new SendInstallSnapshot(bs));
+
+ List<Object> objectList = MessageCollectorActor.getAllMatching(followerActor,
+ InstallSnapshotMessages.InstallSnapshot.class);
+
+ assertEquals(1, objectList.size());
+
+ Object o = objectList.get(0);
+ assertTrue(o instanceof InstallSnapshotMessages.InstallSnapshot);
+
+ InstallSnapshotMessages.InstallSnapshot installSnapshot = (InstallSnapshotMessages.InstallSnapshot) o;
+
+ assertEquals(1, installSnapshot.getChunkIndex());
+ assertEquals(3, installSnapshot.getTotalChunks());
+
+ leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
+ "follower-reply", installSnapshot.getChunkIndex(), true));
+
+ objectList = MessageCollectorActor.getAllMatching(followerActor,
+ InstallSnapshotMessages.InstallSnapshot.class);
+
+ assertEquals(2, objectList.size());
+
+ installSnapshot = (InstallSnapshotMessages.InstallSnapshot) objectList.get(1);
+
+ leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
+ "follower-reply", installSnapshot.getChunkIndex(), true));
+
+ objectList = MessageCollectorActor.getAllMatching(followerActor,
+ InstallSnapshotMessages.InstallSnapshot.class);
+
+ assertEquals(3, objectList.size());
+
+ installSnapshot = (InstallSnapshotMessages.InstallSnapshot) objectList.get(2);
+
+ // Send snapshot reply one more time and make sure that a new snapshot message should not be sent to follower
+ leader.handleMessage(followerActor, new InstallSnapshotReply(actorContext.getTermInformation().getCurrentTerm(),
+ "follower-reply", installSnapshot.getChunkIndex(), true));
+
+ objectList = MessageCollectorActor.getAllMatching(followerActor,
+ InstallSnapshotMessages.InstallSnapshot.class);
+
+ // Count should still stay at 3
+ assertEquals(3, objectList.size());
+ }};
+ }
+