| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.cassandra.service.paxos; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Objects; |
| |
| import com.google.common.collect.Iterables; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.dht.Murmur3Partitioner; |
| import org.apache.cassandra.service.paxos.AbstractPaxosRepair.State; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| import static org.apache.cassandra.service.paxos.AbstractPaxosRepair.DONE; |
| |
| /** |
| * test the state change logic of AbstractPaxosRepair |
| */ |
| public class AbstractPaxosRepairTest |
| { |
| private static DecoratedKey dk(int k) |
| { |
| return Murmur3Partitioner.instance.decorateKey(ByteBufferUtil.bytes(k)); |
| } |
| |
| private static final DecoratedKey DK1 = dk(1); |
| |
| private static State STARTED = new State(); |
| |
| private static class PaxosTestRepair extends AbstractPaxosRepair |
| { |
| public PaxosTestRepair() |
| { |
| super(Murmur3Partitioner.instance.decorateKey(ByteBufferUtil.bytes(1)), null); |
| } |
| |
| public State restart(State state, long waitUntil) |
| { |
| return STARTED; |
| } |
| |
| public void setState(State update) |
| { |
| updateState(state(), null, (i1, i2) -> update); |
| } |
| } |
| |
| private static class Event |
| { |
| final AbstractPaxosRepair repair; |
| final AbstractPaxosRepair.Result result; |
| |
| public Event(AbstractPaxosRepair repair, AbstractPaxosRepair.Result result) |
| { |
| this.repair = repair; |
| this.result = result; |
| } |
| |
| public String toString() |
| { |
| return "Event{" + |
| "repair=" + repair + |
| ", result=" + result + |
| '}'; |
| } |
| |
| public boolean equals(Object o) |
| { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| Event event = (Event) o; |
| return Objects.equals(repair, event.repair) && Objects.equals(result, event.result); |
| } |
| |
| public int hashCode() |
| { |
| return Objects.hash(repair, result); |
| } |
| } |
| |
| private static class Listener implements AbstractPaxosRepair.Listener |
| { |
| |
| final List<Event> events = new ArrayList<>(); |
| |
| public void onComplete(AbstractPaxosRepair repair, AbstractPaxosRepair.Result result) |
| { |
| events.add(new Event(repair, result)); |
| } |
| |
| public Event getOnlyEvent() |
| { |
| return Iterables.getOnlyElement(events); |
| } |
| } |
| |
| @Test |
| public void stateUpdate() |
| { |
| // listeners shoulnd't be called on state updates |
| PaxosTestRepair repair = new PaxosTestRepair(); |
| Listener listener = new Listener(); |
| repair.addListener(listener); |
| Assert.assertNull(repair.state()); |
| repair.start(); |
| Assert.assertSame(STARTED, repair.state()); |
| Assert.assertTrue(listener.events.isEmpty()); |
| } |
| |
| @Test |
| public void resultUpdate() |
| { |
| // listeners should be called on state updates |
| PaxosTestRepair repair = new PaxosTestRepair(); |
| Listener listener = new Listener(); |
| repair.addListener(listener); |
| repair.start(); |
| Assert.assertTrue(listener.events.isEmpty()); |
| |
| repair.setState(DONE); |
| Assert.assertEquals(new Event(repair, DONE), listener.getOnlyEvent()); |
| } |
| |
| @Test |
| public void stateUpdateException() |
| { |
| // state should be set to failure and listeners called on exception |
| Throwable e = new Throwable(); |
| |
| PaxosTestRepair repair = new PaxosTestRepair(); |
| Listener listener = new Listener(); |
| repair.addListener(listener); |
| repair.start(); |
| |
| repair.updateState(repair.state(), null, (i1, i2) -> {throw e;}); |
| Assert.assertEquals(new Event(repair, new AbstractPaxosRepair.Failure(e)), listener.getOnlyEvent()); |
| |
| } |
| |
| @Test |
| public void postResultListenerAttachment() |
| { |
| // listener should be called immediately if the repair is already complete |
| PaxosTestRepair repair = new PaxosTestRepair(); |
| repair.start(); |
| |
| repair.setState(DONE); |
| |
| Listener listener = new Listener(); |
| Assert.assertTrue(listener.events.isEmpty()); |
| repair.addListener(listener); |
| Assert.assertEquals(new Event(repair, DONE), listener.getOnlyEvent()); |
| } |
| } |