/**
* Copyright 2005-2014 Red Hat, Inc.
*
* Red Hat 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 io.fabric8.groups;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.RetryNTimes;
import org.apache.zookeeper.server.NIOServerCnxnFactory;
import org.apache.zookeeper.server.ServerConfig;
import org.apache.zookeeper.server.ZooKeeperServer;
import org.apache.zookeeper.server.persistence.FileTxnSnapLog;
import io.fabric8.groups.internal.ZooKeeperGroup;
import org.junit.Test;
import java.io.File;
import java.net.ServerSocket;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class GroupTest {
private GroupListener listener = new GroupListener<NodeState>() {
@Override
public void groupEvent(Group<NodeState> group, GroupListener.GroupEvent event) {
boolean connected = group.isConnected();
boolean master = group.isMaster();
if (connected) {
Collection<NodeState> members = group.members().values();
System.err.println("GroupEvent: " + event + " (connected=" + connected + ", master=" + master + ", members=" + members + ")");
} else {
System.err.println("GroupEvent: " + event + " (connected=" + connected + ", master=false)");
}
}
};
private int findFreePort() throws Exception {
ServerSocket ss = new ServerSocket(0);
int port = ss.getLocalPort();
ss.close();
return port;
}
private NIOServerCnxnFactory startZooKeeper(int port) throws Exception {
ServerConfig cfg = new ServerConfig();
cfg.parse(new String[] { Integer.toString(port), "target/zk/data" });
ZooKeeperServer zkServer = new ZooKeeperServer();
FileTxnSnapLog ftxn = new FileTxnSnapLog(new File(cfg.getDataLogDir()), new File(cfg.getDataDir()));
zkServer.setTxnLogFactory(ftxn);
zkServer.setTickTime(cfg.getTickTime());
zkServer.setMinSessionTimeout(cfg.getMinSessionTimeout());
zkServer.setMaxSessionTimeout(cfg.getMaxSessionTimeout());
NIOServerCnxnFactory cnxnFactory = new NIOServerCnxnFactory();
cnxnFactory.configure(cfg.getClientPortAddress(), cfg.getMaxClientCnxns());
cnxnFactory.startup(zkServer);
return cnxnFactory;
}
@Test
public void testJoinAfterConnect() throws Exception {
int port = findFreePort();
CuratorFramework curator = CuratorFrameworkFactory.builder()
.connectString("localhost:" + port)
.retryPolicy(new RetryNTimes(10, 100))
.build();
curator.start();
final Group<NodeState> group = new ZooKeeperGroup<NodeState>(curator, "/singletons/test" + System.currentTimeMillis(), NodeState.class);
group.add(listener);
group.start();
assertFalse(group.isConnected());
assertFalse(group.isMaster());
GroupCondition groupCondition = new GroupCondition();
group.add(groupCondition);
NIOServerCnxnFactory cnxnFactory = startZooKeeper(port);
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
assertTrue(groupCondition.waitForConnected(5, TimeUnit.SECONDS));
assertFalse(group.isMaster());
group.update(new NodeState("foo"));
assertTrue(groupCondition.waitForMaster(5, TimeUnit.SECONDS));
group.close();
curator.close();
cnxnFactory.shutdown();
cnxnFactory.join();
}
@Test
public void testJoinBeforeConnect() throws Exception {
int port = findFreePort();
CuratorFramework curator = CuratorFrameworkFactory.builder()
.connectString("localhost:" + port)
.retryPolicy(new RetryNTimes(10, 100))
.build();
curator.start();
Group<NodeState> group = new ZooKeeperGroup<NodeState>(curator, "/singletons/test" + System.currentTimeMillis(), NodeState.class);
group.add(listener);
group.start();
GroupCondition groupCondition = new GroupCondition();
group.add(groupCondition);
assertFalse(group.isConnected());
assertFalse(group.isMaster());
group.update(new NodeState("foo"));
NIOServerCnxnFactory cnxnFactory = startZooKeeper(port);
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
assertTrue(groupCondition.waitForConnected(5, TimeUnit.SECONDS));
assertTrue(groupCondition.waitForMaster(5, TimeUnit.SECONDS));
group.close();
curator.close();
cnxnFactory.shutdown();
cnxnFactory.join();
}
@Test
public void testRejoinAfterDisconnect() throws Exception {
int port = findFreePort();
CuratorFramework curator = CuratorFrameworkFactory.builder()
.connectString("localhost:" + port)
.retryPolicy(new RetryNTimes(10, 100))
.build();
curator.start();
NIOServerCnxnFactory cnxnFactory = startZooKeeper(port);
Group<NodeState> group = new ZooKeeperGroup<NodeState>(curator, "/singletons/test" + System.currentTimeMillis(), NodeState.class);
group.add(listener);
group.update(new NodeState("foo"));
group.start();
GroupCondition groupCondition = new GroupCondition();
group.add(groupCondition);
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
assertTrue(groupCondition.waitForConnected(5, TimeUnit.SECONDS));
assertTrue(groupCondition.waitForMaster(5, TimeUnit.SECONDS));
cnxnFactory.shutdown();
cnxnFactory.join();
groupCondition.waitForDisconnected(5, TimeUnit.SECONDS);
group.remove(groupCondition);
assertFalse(group.isConnected());
assertFalse(group.isMaster());
groupCondition = new GroupCondition();
group.add(groupCondition);
cnxnFactory = startZooKeeper(port);
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
assertTrue(groupCondition.waitForConnected(5, TimeUnit.SECONDS));
assertTrue(groupCondition.waitForMaster(5, TimeUnit.SECONDS));
group.close();
curator.close();
cnxnFactory.shutdown();
cnxnFactory.join();
}
//Tests that if close() is executed right after start(), there are no left over entries.
//(see https://github.com/jboss-fuse/fuse/issues/133)
@Test
public void testGroupClose() throws Exception {
int port = findFreePort();
NIOServerCnxnFactory cnxnFactory = startZooKeeper(port);
CuratorFramework curator = CuratorFrameworkFactory.builder()
.connectString("localhost:" + port)
.retryPolicy(new RetryNTimes(10, 100))
.build();
curator.start();
curator.getZookeeperClient().blockUntilConnectedOrTimedOut();
String groupNode = "/singletons/test" + System.currentTimeMillis();
curator.create().creatingParentsIfNeeded().forPath(groupNode);
for (int i = 0; i < 10; i++) {
Group<NodeState> group = new ZooKeeperGroup<NodeState>(curator, groupNode, NodeState.class);
group.add(listener);
group.update(new NodeState("foo"));
group.start();
group.close();
List<String> entries = curator.getChildren().forPath(groupNode);
assertTrue(entries.isEmpty());
}
curator.close();
cnxnFactory.shutdown();
cnxnFactory.join();
}
private class GroupCondition implements GroupListener<NodeState> {
private CountDownLatch connected = new CountDownLatch(1);
private CountDownLatch master = new CountDownLatch(1);
private CountDownLatch disconnected = new CountDownLatch(1);
@Override
public void groupEvent(Group<NodeState> group, GroupEvent event) {
switch (event) {
case CONNECTED:
case CHANGED:
connected.countDown();
if (group.isMaster()) {
master.countDown();
}
break;
case DISCONNECTED:
disconnected.countDown();
}
}
public boolean waitForConnected(long time, TimeUnit timeUnit) throws InterruptedException {
return connected.await(time, timeUnit);
}
public boolean waitForDisconnected(long time, TimeUnit timeUnit) throws InterruptedException {
return disconnected.await(time, timeUnit);
}
public boolean waitForMaster(long time, TimeUnit timeUnit) throws InterruptedException {
return master.await(time, timeUnit);
}
}
}