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* 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.curator.x.discovery;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.google.common.io.Closeables;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.KillSession;
import org.apache.curator.test.TestingServer;
import org.apache.curator.test.Timing;
import org.apache.curator.x.discovery.details.JsonInstanceSerializer;
import org.apache.curator.x.discovery.details.ServiceDiscoveryImpl;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.io.Closeable;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.Semaphore;
public class TestServiceDiscovery
{
private static final Comparator<ServiceInstance<Void>> comparator = new Comparator<ServiceInstance<Void>>()
{
@Override
public int compare(ServiceInstance<Void> o1, ServiceInstance<Void> o2)
{
return o1.getId().compareTo(o2.getId());
}
};
@Test
public void testCrashedServerMultiInstances() throws Exception
{
List<Closeable> closeables = Lists.newArrayList();
TestingServer server = new TestingServer();
closeables.add(server);
try
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
closeables.add(client);
client.start();
final Semaphore semaphore = new Semaphore(0);
ServiceInstance<String> instance1 = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
ServiceInstance<String> instance2 = ServiceInstance.<String>builder().payload("thing").name("test").port(10065).build();
ServiceDiscovery<String> discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance1)
{
@Override
protected void internalRegisterService(ServiceInstance<String> service) throws Exception
{
super.internalRegisterService(service);
semaphore.release();
}
};
closeables.add(discovery);
discovery.start();
discovery.registerService(instance2);
timing.acquireSemaphore(semaphore, 2);
Assert.assertEquals(discovery.queryForInstances("test").size(), 2);
KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
server.stop();
server = new TestingServer(server.getPort(), server.getTempDirectory());
closeables.add(server);
timing.acquireSemaphore(semaphore, 2);
Assert.assertEquals(discovery.queryForInstances("test").size(), 2);
}
finally
{
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testCrashedServer() throws Exception
{
List<Closeable> closeables = Lists.newArrayList();
TestingServer server = new TestingServer();
closeables.add(server);
try
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
closeables.add(client);
client.start();
final Semaphore semaphore = new Semaphore(0);
ServiceInstance<String> instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
ServiceDiscovery<String> discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance)
{
@Override
protected void internalRegisterService(ServiceInstance<String> service) throws Exception
{
super.internalRegisterService(service);
semaphore.release();
}
};
closeables.add(discovery);
discovery.start();
timing.acquireSemaphore(semaphore);
Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
server.stop();
server = new TestingServer(server.getPort(), server.getTempDirectory());
closeables.add(server);
timing.acquireSemaphore(semaphore);
Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
}
finally
{
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testCrashedInstance() throws Exception
{
List<Closeable> closeables = Lists.newArrayList();
TestingServer server = new TestingServer();
closeables.add(server);
try
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
closeables.add(client);
client.start();
ServiceInstance<String> instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
ServiceDiscovery<String> discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance);
closeables.add(discovery);
discovery.start();
Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
Thread.sleep(timing.multiple(1.5).session());
Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testMultipleInstances() throws Exception
{
final String SERVICE_ONE = "one";
final String SERVICE_TWO = "two";
List<Closeable> closeables = Lists.newArrayList();
TestingServer server = new TestingServer();
closeables.add(server);
try
{
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
closeables.add(client);
client.start();
ServiceInstance<Void> s1_i1 = ServiceInstance.<Void>builder().name(SERVICE_ONE).build();
ServiceInstance<Void> s1_i2 = ServiceInstance.<Void>builder().name(SERVICE_ONE).build();
ServiceInstance<Void> s2_i1 = ServiceInstance.<Void>builder().name(SERVICE_TWO).build();
ServiceInstance<Void> s2_i2 = ServiceInstance.<Void>builder().name(SERVICE_TWO).build();
ServiceDiscovery<Void> discovery = ServiceDiscoveryBuilder.builder(Void.class).client(client).basePath("/test").build();
closeables.add(discovery);
discovery.start();
discovery.registerService(s1_i1);
discovery.registerService(s1_i2);
discovery.registerService(s2_i1);
discovery.registerService(s2_i2);
Assert.assertEquals(Sets.newHashSet(discovery.queryForNames()), Sets.newHashSet(SERVICE_ONE, SERVICE_TWO));
List<ServiceInstance<Void>> list = Lists.newArrayList();
list.add(s1_i1);
list.add(s1_i2);
Collections.sort(list, comparator);
List<ServiceInstance<Void>> queriedInstances = Lists.newArrayList(discovery.queryForInstances(SERVICE_ONE));
Collections.sort(queriedInstances, comparator);
Assert.assertEquals(queriedInstances, list, String.format("Not equal l: %s - d: %s", list, queriedInstances));
list.clear();
list.add(s2_i1);
list.add(s2_i2);
Collections.sort(list, comparator);
queriedInstances = Lists.newArrayList(discovery.queryForInstances(SERVICE_TWO));
Collections.sort(queriedInstances, comparator);
Assert.assertEquals(queriedInstances, list, String.format("Not equal 2: %s - d: %s", list, queriedInstances));
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testBasic() throws Exception
{
List<Closeable> closeables = Lists.newArrayList();
TestingServer server = new TestingServer();
closeables.add(server);
try
{
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
closeables.add(client);
client.start();
ServiceInstance<String> instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
ServiceDiscovery<String> discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/test").client(client).thisInstance(instance).build();
closeables.add(discovery);
discovery.start();
Assert.assertEquals(discovery.queryForNames(), Arrays.asList("test"));
List<ServiceInstance<String>> list = Lists.newArrayList();
list.add(instance);
Assert.assertEquals(discovery.queryForInstances("test"), list);
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
}