/**
* Copyright 2011 LiveRamp
*
* 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 com.liveramp.hank.coordinator.zk;
import com.liveramp.hank.coordinator.Coordinator;
import com.liveramp.hank.coordinator.Domain;
import com.liveramp.hank.coordinator.Host;
import com.liveramp.hank.coordinator.HostDomain;
import com.liveramp.hank.coordinator.HostDomainPartition;
import com.liveramp.hank.coordinator.HostState;
import com.liveramp.hank.coordinator.PartitionServerAddress;
import com.liveramp.hank.coordinator.Ring;
import com.liveramp.hank.coordinator.RingGroup;
import com.liveramp.hank.coordinator.RingGroupDataLocationChangeListener;
import com.liveramp.hank.coordinator.mock.MockCoordinator;
import com.liveramp.hank.coordinator.mock.MockDomain;
import com.liveramp.hank.coordinator.mock.MockDomainGroup;
import com.liveramp.hank.ring_group_conductor.RingGroupConductorMode;
import com.liveramp.hank.test.ZkTestCase;
import com.liveramp.hank.util.Condition;
import com.liveramp.hank.util.WaitUntil;
import com.liveramp.hank.zookeeper.ZkPath;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.util.Collections;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class TestZkRingGroup extends ZkTestCase {
private Coordinator coordinator;
private class MockRingGroupDataLocationChangeListener implements RingGroupDataLocationChangeListener {
private boolean isCalled = false;
@Override
public void onDataLocationChange(RingGroup ringGroup) {
isCalled = true;
}
public void clear() {
isCalled = false;
}
public boolean isCalled() {
return isCalled;
}
}
@Before
public void setUp() throws Exception {
create(dg_root);
create(ring_groups);
this.coordinator = new MockCoordinator() {
@Override
public Domain getDomain(String domainName) {
return new MockDomain(domainName);
}
};
}
private final String ring_groups = ZkPath.append(getRoot(), "ring_groups");
private final String ring_group = ZkPath.append(ring_groups, "myRingGroup");
private final String dg_root = ZkPath.append(getRoot(), "domain_groups");
@Test
public void testLoad() throws Exception {
create(ring_group, ZkPath.append(dg_root, "myDomainGroup"));
createRing(1);
createRing(2);
createRing(3);
MockDomainGroup dg = new MockDomainGroup("myDomainGroup");
ZkRingGroup rg = new ZkRingGroup(getZk(), ring_group, dg, coordinator);
assertEquals("ring group name", "myRingGroup", rg.getName());
assertEquals("num rings", 3, rg.getRings().size());
assertEquals("domain group config", dg, rg.getDomainGroup());
assertEquals("ring group for localhost:2", 2, rg.getRingForHost(new PartitionServerAddress("localhost", 2)).getRingNumber());
assertEquals("ring group by number", 3, rg.getRing(3).getRingNumber());
}
@Test
public void testDataLocationChangeListeners() throws Exception {
create(ring_group, ZkPath.append(dg_root, "myDomainGroup"));
createRing(1);
createRing(2);
createRing(3);
PartitionServerAddress address = new PartitionServerAddress("localhost", 42);
MockDomainGroup dg = new MockDomainGroup("myDomainGroup");
ZkRingGroup rg = new ZkRingGroup(getZk(), ring_group, dg, coordinator);
final MockRingGroupDataLocationChangeListener dataLocationChangeListener = new MockRingGroupDataLocationChangeListener();
rg.addDataLocationChangeListener(dataLocationChangeListener);
assertFalse(dataLocationChangeListener.isCalled());
Host host = rg.getRing(1).addHost(address, Collections.<String>emptyList());
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
return dataLocationChangeListener.isCalled;
}
});
assertTrue(dataLocationChangeListener.isCalled());
dataLocationChangeListener.clear();
HostDomain hostDomain = host.addDomain(new MockDomain("domain"));
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
return dataLocationChangeListener.isCalled;
}
});
assertTrue(dataLocationChangeListener.isCalled());
dataLocationChangeListener.clear();
HostDomainPartition hostDomainPartition = hostDomain.addPartition(0);
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
return !dataLocationChangeListener.isCalled();
}
});
assertFalse(dataLocationChangeListener.isCalled());
dataLocationChangeListener.clear();
hostDomainPartition.setDeletable(true);
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
return !dataLocationChangeListener.isCalled();
}
});
assertFalse(dataLocationChangeListener.isCalled());
dataLocationChangeListener.clear();
rg.getRing(1).getHostByAddress(address).setState(HostState.SERVING);
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
return dataLocationChangeListener.isCalled;
}
});
assertTrue(dataLocationChangeListener.isCalled());
dataLocationChangeListener.clear();
}
@Test
public void testClaimRingGroupConductor() throws Exception {
ZkDomainGroup dg = ZkDomainGroup.create(getZk(), null, dg_root, "blah");
dg.setDomainVersions(Collections.<Domain, Integer>emptyMap());
final RingGroup rg = ZkRingGroup.create(getZk(), ring_group, dg, coordinator);
create(ZkPath.append(ring_group, ZkRingGroup.RING_GROUP_CONDUCTOR_ONLINE_PATH));
assertFalse(rg.claimRingGroupConductor(RingGroupConductorMode.ACTIVE));
getZk().delete(ZkPath.append(ring_group, ZkRingGroup.RING_GROUP_CONDUCTOR_ONLINE_PATH), -1);
assertTrue(rg.claimRingGroupConductor(RingGroupConductorMode.ACTIVE));
assertFalse(rg.claimRingGroupConductor(RingGroupConductorMode.ACTIVE));
rg.releaseRingGroupConductor();
assertTrue(rg.claimRingGroupConductor(RingGroupConductorMode.ACTIVE));
WaitUntil.orDie(new Condition() {
@Override
public boolean test() {
try {
return RingGroupConductorMode.ACTIVE.equals(rg.getRingGroupConductorMode());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
});
assertEquals(RingGroupConductorMode.ACTIVE, rg.getRingGroupConductorMode());
}
@Test
public void testDelete() throws Exception {
ZkDomainGroup dg = ZkDomainGroup.create(getZk(), null, dg_root, "blah");
assertNotNull(getZk().exists(ZkPath.append(dg_root, "blah"), false));
assertTrue(dg.delete());
assertNull(getZk().exists(ZkPath.append(dg_root, "blah"), false));
}
private void createRing(int ringNum) throws Exception {
Ring rc = ZkRing.create(getZk(), coordinator, ring_group, ringNum, null, null);
rc.addHost(new PartitionServerAddress("localhost", ringNum), Collections.<String>emptyList());
}
}