1 package org.opendaylight.controller.cluster.raft.behaviors;
3 import akka.actor.ActorRef;
4 import akka.actor.Props;
5 import akka.testkit.JavaTestKit;
7 import org.opendaylight.controller.cluster.raft.AbstractActorTest;
8 import org.opendaylight.controller.cluster.raft.MockRaftActorContext;
9 import org.opendaylight.controller.cluster.raft.RaftActorContext;
10 import org.opendaylight.controller.cluster.raft.RaftState;
11 import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
12 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
13 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
14 import org.opendaylight.controller.cluster.raft.messages.RaftRPC;
15 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
16 import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply;
17 import org.opendaylight.controller.cluster.raft.utils.DoNothingActor;
19 import java.util.ArrayList;
20 import java.util.List;
22 import static org.junit.Assert.assertEquals;
24 public abstract class AbstractRaftActorBehaviorTest extends AbstractActorTest {
26 private final ActorRef behaviorActor = getSystem().actorOf(Props.create(
27 DoNothingActor.class));
30 * This test checks that when a new Raft RPC message is received with a newer
31 * term the RaftActor gets into the Follower state.
36 public void testHandleRaftRPCWithNewerTerm() throws Exception {
37 new JavaTestKit(getSystem()) {{
39 assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(getTestActor(),
40 createAppendEntriesWithNewerTerm());
42 assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(getTestActor(),
43 createAppendEntriesReplyWithNewerTerm());
45 assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(getTestActor(),
46 createRequestVoteWithNewerTerm());
48 assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(getTestActor(),
49 createRequestVoteReplyWithNewerTerm());
57 * This test verifies that when an AppendEntries is received with a term that
58 * is less that the currentTerm of the RaftActor then the RaftActor does not
59 * change it's state and it responds back with a failure
64 public void testHandleAppendEntriesSenderTermLessThanReceiverTerm()
66 new JavaTestKit(getSystem()) {{
68 MockRaftActorContext context = (MockRaftActorContext)
71 // First set the receivers term to a high number (1000)
72 context.getTermInformation().update(1000, "test");
74 AppendEntries appendEntries =
75 new AppendEntries(100, "leader-1", 0, 0, null, 101);
77 RaftActorBehavior behavior = createBehavior(context);
79 // Send an unknown message so that the state of the RaftActor remains unchanged
80 RaftState expected = behavior.handleMessage(getRef(), "unknown");
83 behavior.handleMessage(getRef(), appendEntries);
85 assertEquals(expected, raftState);
87 // Also expect an AppendEntriesReply to be sent where success is false
88 final Boolean out = new ExpectMsg<Boolean>(duration("1 seconds"),
89 "AppendEntriesReply") {
90 // do not put code outside this method, will run afterwards
91 protected Boolean match(Object in) {
92 if (in instanceof AppendEntriesReply) {
93 AppendEntriesReply reply = (AppendEntriesReply) in;
94 return reply.isSuccess();
101 assertEquals(false, out);
109 public void testHandleAppendEntriesAddSameEntryToLog(){
110 new JavaTestKit(getSystem()) {
113 MockRaftActorContext context = (MockRaftActorContext)
114 createActorContext();
116 // First set the receivers term to lower number
117 context.getTermInformation().update(2, "test");
119 // Prepare the receivers log
120 MockRaftActorContext.SimpleReplicatedLog log =
121 new MockRaftActorContext.SimpleReplicatedLog();
123 new MockRaftActorContext.MockReplicatedLogEntry(1, 0, "zero"));
125 context.setReplicatedLog(log);
127 List<ReplicatedLogEntry> entries = new ArrayList<>();
129 new MockRaftActorContext.MockReplicatedLogEntry(1, 0, "zero"));
131 AppendEntries appendEntries =
132 new AppendEntries(2, "leader-1", -1, 1, entries, 0);
134 RaftActorBehavior behavior = createBehavior(context);
136 if (AbstractRaftActorBehaviorTest.this instanceof CandidateTest) {
137 // Resetting the Candidates term to make sure it will match
138 // the term sent by AppendEntries. If this was not done then
139 // the test will fail because the Candidate will assume that
140 // the message was sent to it from a lower term peer and will
141 // thus respond with a failure
142 context.getTermInformation().update(2, "test");
145 // Send an unknown message so that the state of the RaftActor remains unchanged
146 RaftState expected = behavior.handleMessage(getRef(), "unknown");
148 RaftState raftState =
149 behavior.handleMessage(getRef(), appendEntries);
151 assertEquals(expected, raftState);
153 assertEquals(1, log.size());
160 * This test verifies that when a RequestVote is received by the RaftActor
161 * with a term which is greater than the RaftActors' currentTerm and the
162 * senders' log is more upto date than the receiver that the receiver grants
163 * the vote to the sender
166 public void testHandleRequestVoteWhenSenderTermGreaterThanCurrentTermAndSenderLogMoreUpToDate() {
167 new JavaTestKit(getSystem()) {{
169 new Within(duration("1 seconds")) {
170 protected void run() {
172 RaftActorBehavior follower = createBehavior(
173 createActorContext(behaviorActor));
175 follower.handleMessage(getTestActor(),
176 new RequestVote(1000, "test", 10000, 999));
179 new ExpectMsg<Boolean>(duration("1 seconds"),
180 "RequestVoteReply") {
181 // do not put code outside this method, will run afterwards
182 protected Boolean match(Object in) {
183 if (in instanceof RequestVoteReply) {
184 RequestVoteReply reply =
185 (RequestVoteReply) in;
186 return reply.isVoteGranted();
193 assertEquals(true, out);
200 * This test verifies that when a RaftActor receives a RequestVote message
201 * with a term that is greater than it's currentTerm but a less up-to-date
202 * log then the receiving RaftActor will not grant the vote to the sender
205 public void testHandleRequestVoteWhenSenderTermGreaterThanCurrentTermButSenderLogLessUptoDate() {
206 new JavaTestKit(getSystem()) {{
208 new Within(duration("1 seconds")) {
209 protected void run() {
211 RaftActorContext actorContext =
212 createActorContext(behaviorActor);
214 MockRaftActorContext.MockReplicatedLog
215 log = new MockRaftActorContext.MockReplicatedLog();
216 log.setReplicatedLogEntry(
217 new MockRaftActorContext.MockReplicatedLogEntry(20000,
220 new MockRaftActorContext.MockReplicatedLogEntry(20000,
224 ((MockRaftActorContext) actorContext).setReplicatedLog(log);
226 RaftActorBehavior follower = createBehavior(actorContext);
228 follower.handleMessage(getTestActor(),
229 new RequestVote(1000, "test", 10000, 999));
232 new ExpectMsg<Boolean>(duration("1 seconds"),
233 "RequestVoteReply") {
234 // do not put code outside this method, will run afterwards
235 protected Boolean match(Object in) {
236 if (in instanceof RequestVoteReply) {
237 RequestVoteReply reply =
238 (RequestVoteReply) in;
239 return reply.isVoteGranted();
246 assertEquals(false, out);
255 * This test verifies that the receiving RaftActor will not grant a vote
256 * to a sender if the sender's term is lesser than the currentTerm of the
257 * recipient RaftActor
260 public void testHandleRequestVoteWhenSenderTermLessThanCurrentTerm() {
261 new JavaTestKit(getSystem()) {{
263 new Within(duration("1 seconds")) {
264 protected void run() {
266 RaftActorContext context =
267 createActorContext(behaviorActor);
269 context.getTermInformation().update(1000, null);
271 RaftActorBehavior follower = createBehavior(context);
273 follower.handleMessage(getTestActor(),
274 new RequestVote(999, "test", 10000, 999));
277 new ExpectMsg<Boolean>(duration("1 seconds"),
278 "RequestVoteReply") {
279 // do not put code outside this method, will run afterwards
280 protected Boolean match(Object in) {
281 if (in instanceof RequestVoteReply) {
282 RequestVoteReply reply =
283 (RequestVoteReply) in;
284 return reply.isVoteGranted();
291 assertEquals(false, out);
297 protected void assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(
298 ActorRef actorRef, RaftRPC rpc) {
300 RaftActorContext actorContext = createActorContext();
302 (MockRaftActorContext) actorContext, 0, 0, "");
304 RaftState raftState = createBehavior(actorContext)
305 .handleMessage(actorRef, rpc);
307 assertEquals(RaftState.Follower, raftState);
310 protected MockRaftActorContext.MockReplicatedLog setLastLogEntry(
311 MockRaftActorContext actorContext, long term, long index, Object data) {
312 return setLastLogEntry(actorContext,
313 new MockRaftActorContext.MockReplicatedLogEntry(term, index, data));
316 protected MockRaftActorContext.MockReplicatedLog setLastLogEntry(
317 MockRaftActorContext actorContext, ReplicatedLogEntry logEntry) {
318 MockRaftActorContext.MockReplicatedLog
319 log = new MockRaftActorContext.MockReplicatedLog();
320 // By default MockReplicateLog has last entry set to (1,1,"")
321 log.setLast(logEntry);
322 actorContext.setReplicatedLog(log);
327 protected abstract RaftActorBehavior createBehavior(
328 RaftActorContext actorContext);
330 protected RaftActorBehavior createBehavior() {
331 return createBehavior(createActorContext());
334 protected RaftActorContext createActorContext() {
335 return new MockRaftActorContext();
338 protected RaftActorContext createActorContext(ActorRef actor) {
339 return new MockRaftActorContext("test", getSystem(), actor);
342 protected AppendEntries createAppendEntriesWithNewerTerm() {
343 return new AppendEntries(100, "leader-1", 0, 0, null, 1);
346 protected AppendEntriesReply createAppendEntriesReplyWithNewerTerm() {
347 return new AppendEntriesReply("follower-1", 100, false, 100, 100);
350 protected RequestVote createRequestVoteWithNewerTerm() {
351 return new RequestVote(100, "candidate-1", 10, 100);
354 protected RequestVoteReply createRequestVoteReplyWithNewerTerm() {
355 return new RequestVoteReply(100, false);