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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed 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.onosproject.store.trivial;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.onosproject.cluster.NodeId;
import org.onosproject.mastership.MastershipEvent;
import org.onosproject.mastership.MastershipTerm;
import org.onosproject.net.DeviceId;
import com.google.common.collect.Sets;
import com.google.common.util.concurrent.Futures;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.onosproject.mastership.MastershipEvent.Type.*;
import static org.onosproject.net.MastershipRole.*;
/**
* Test for the simple MastershipStore implementation.
*/
public class SimpleMastershipStoreTest {
private static final DeviceId DID1 = DeviceId.deviceId("of:01");
private static final DeviceId DID2 = DeviceId.deviceId("of:02");
private static final DeviceId DID3 = DeviceId.deviceId("of:03");
private static final DeviceId DID4 = DeviceId.deviceId("of:04");
private static final NodeId N1 = new NodeId("local");
private static final NodeId N2 = new NodeId("other");
private SimpleMastershipStore sms;
@Before
public void setUp() throws Exception {
sms = new SimpleMastershipStore();
sms.activate();
}
@After
public void tearDown() throws Exception {
sms.deactivate();
}
@Test
public void getRole() {
//special case, no backup or master
put(DID1, N1, false, false);
assertEquals("wrong role", NONE, sms.getRole(N1, DID1));
//backup exists but we aren't mapped
put(DID2, N1, false, true);
assertEquals("wrong role", STANDBY, sms.getRole(N1, DID2));
//N2 is master
put(DID3, N2, true, true);
assertEquals("wrong role", MASTER, sms.getRole(N2, DID3));
//N2 is master but N1 is only in backups set
put(DID4, N1, false, true);
put(DID4, N2, true, false);
assertEquals("wrong role", STANDBY, sms.getRole(N1, DID4));
}
@Test
public void getMaster() {
put(DID3, N2, true, true);
assertEquals("wrong role", MASTER, sms.getRole(N2, DID3));
assertEquals("wrong device", N2, sms.getMaster(DID3));
}
@Test
public void setMaster() {
put(DID1, N1, false, false);
assertEquals("wrong event", MASTER_CHANGED, Futures.getUnchecked(sms.setMaster(N1, DID1)).type());
assertEquals("wrong role", MASTER, sms.getRole(N1, DID1));
//set node that's already master - should be ignored
assertNull("wrong event", Futures.getUnchecked(sms.setMaster(N1, DID1)));
//set STANDBY to MASTER
put(DID2, N1, false, true);
assertEquals("wrong role", STANDBY, sms.getRole(N1, DID2));
assertEquals("wrong event", MASTER_CHANGED, Futures.getUnchecked(sms.setMaster(N1, DID2)).type());
assertEquals("wrong role", MASTER, sms.getRole(N1, DID2));
}
@Test
public void getDevices() {
Set<DeviceId> d = Sets.newHashSet(DID1, DID2);
put(DID1, N2, true, true);
put(DID2, N2, true, true);
put(DID3, N1, true, true);
assertTrue("wrong devices", d.equals(sms.getDevices(N2)));
}
@Test
public void getTermFor() {
put(DID1, N1, true, true);
assertEquals("wrong term", MastershipTerm.of(N1, 0), sms.getTermFor(DID1));
//switch to N2 and back - 2 term switches
sms.setMaster(N2, DID1);
sms.setMaster(N1, DID1);
assertEquals("wrong term", MastershipTerm.of(N1, 2), sms.getTermFor(DID1));
}
@Test
public void requestRole() {
//NONE - become MASTER
put(DID1, N1, false, false);
assertEquals("wrong role", MASTER, Futures.getUnchecked(sms.requestRole(DID1)));
//was STANDBY - become MASTER
put(DID2, N1, false, true);
assertEquals("wrong role", MASTER, Futures.getUnchecked(sms.requestRole(DID2)));
//other MASTER - stay STANDBY
put(DID3, N2, true, false);
assertEquals("wrong role", STANDBY, Futures.getUnchecked(sms.requestRole(DID3)));
//local (N1) is MASTER - stay MASTER
put(DID4, N1, true, true);
assertEquals("wrong role", MASTER, Futures.getUnchecked(sms.requestRole(DID4)));
}
@Test
public void unsetMaster() {
//NONE - record backup but take no other action
put(DID1, N1, false, false);
sms.setStandby(N1, DID1);
assertTrue("not backed up", sms.backups.get(DID1).contains(N1));
int prev = sms.termMap.get(DID1).get();
sms.setStandby(N1, DID1);
assertEquals("term should not change", prev, sms.termMap.get(DID1).get());
//no backup, MASTER
put(DID1, N1, true, false);
assertNull("expect no MASTER event", Futures.getUnchecked(sms.setStandby(N1, DID1)).roleInfo().master());
assertNull("wrong node", sms.masterMap.get(DID1));
//backup, switch
sms.masterMap.clear();
put(DID1, N1, true, true);
put(DID1, N2, false, true);
put(DID2, N2, true, true);
MastershipEvent event = Futures.getUnchecked(sms.setStandby(N1, DID1));
assertEquals("wrong event", MASTER_CHANGED, event.type());
assertEquals("wrong master", N2, event.roleInfo().master());
}
//helper to populate master/backup structures
private void put(DeviceId dev, NodeId node, boolean master, boolean backup) {
if (master) {
sms.masterMap.put(dev, node);
} else if (backup) {
List<NodeId> stbys = sms.backups.getOrDefault(dev, new ArrayList<>());
stbys.add(node);
sms.backups.put(dev, stbys);
}
sms.termMap.put(dev, new AtomicInteger());
}
}
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