/**
* 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.io.Closeables;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.state.ConnectionState;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.TestingServer;
import org.apache.curator.x.discovery.details.ServiceCacheListener;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.io.Closeable;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
public class TestServiceCache
{
@Test
public void testInitialLoad() 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();
ServiceDiscovery<String> discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/discovery").client(client).build();
closeables.add(discovery);
discovery.start();
ServiceCache<String> cache = discovery.serviceCacheBuilder().name("test").build();
closeables.add(cache);
final CountDownLatch latch = new CountDownLatch(3);
ServiceCacheListener listener = new ServiceCacheListener()
{
@Override
public void cacheChanged()
{
latch.countDown();
}
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
}
};
cache.addListener(listener);
cache.start();
ServiceInstance<String> instance1 = ServiceInstance.<String>builder().payload("test").name("test").port(10064).build();
ServiceInstance<String> instance2 = ServiceInstance.<String>builder().payload("test").name("test").port(10065).build();
ServiceInstance<String> instance3 = ServiceInstance.<String>builder().payload("test").name("test").port(10066).build();
discovery.registerService(instance1);
discovery.registerService(instance2);
discovery.registerService(instance3);
Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
ServiceCache<String> cache2 = discovery.serviceCacheBuilder().name("test").build();
closeables.add(cache2);
cache2.start();
Assert.assertEquals(cache2.getInstances().size(), 3);
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testViaProvider() 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();
ServiceDiscovery<String> discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/discovery").client(client).build();
closeables.add(discovery);
discovery.start();
ServiceProvider<String> serviceProvider = discovery.serviceProviderBuilder().serviceName("test").build();
closeables.add(serviceProvider);
serviceProvider.start();
ServiceInstance<String> instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
discovery.registerService(instance);
int count = 0;
ServiceInstance<String> foundInstance = null;
while ( foundInstance == null )
{
Assert.assertTrue(count++ < 5);
foundInstance = serviceProvider.getInstance();
Thread.sleep(1000);
}
Assert.assertEquals(foundInstance, instance);
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testUpdate() 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();
final CountDownLatch latch = new CountDownLatch(1);
ServiceCache<String> cache = discovery.serviceCacheBuilder().name("test").build();
closeables.add(cache);
ServiceCacheListener listener = new ServiceCacheListener()
{
@Override
public void cacheChanged()
{
latch.countDown();
}
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
}
};
cache.addListener(listener);
cache.start();
instance = ServiceInstance.<String>builder().payload("changed").name("test").port(10064).id(instance.getId()).build();
discovery.updateService(instance);
Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
Assert.assertEquals(cache.getInstances().size(), 1);
Assert.assertEquals(cache.getInstances().get(0).getPayload(), instance.getPayload());
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
@Test
public void testCache() 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();
ServiceDiscovery<String> discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/discovery").client(client).build();
closeables.add(discovery);
discovery.start();
ServiceCache<String> cache = discovery.serviceCacheBuilder().name("test").build();
closeables.add(cache);
cache.start();
final Semaphore semaphore = new Semaphore(0);
ServiceCacheListener listener = new ServiceCacheListener()
{
@Override
public void cacheChanged()
{
semaphore.release();
}
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
}
};
cache.addListener(listener);
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();
discovery.registerService(instance1);
Assert.assertTrue(semaphore.tryAcquire(10, TimeUnit.SECONDS));
discovery.registerService(instance2);
Assert.assertTrue(semaphore.tryAcquire(3, TimeUnit.SECONDS));
ServiceInstance<String> instance3 = ServiceInstance.<String>builder().payload("thing").name("another").port(10064).build();
discovery.registerService(instance3);
Assert.assertFalse(semaphore.tryAcquire(3, TimeUnit.SECONDS)); // should not get called for a different service
}
finally
{
Collections.reverse(closeables);
for ( Closeable c : closeables )
{
Closeables.closeQuietly(c);
}
}
}
}