// Copyright 2016 Twitter. All rights reserved.
//
// 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.twitter.heron.metricsmgr.sink.tmaster;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import com.twitter.heron.api.metric.MultiCountMetric;
import com.twitter.heron.common.basics.SingletonRegistry;
import com.twitter.heron.metricsmgr.sink.SinkContextImpl;
import com.twitter.heron.proto.tmaster.TopologyMaster;
import com.twitter.heron.spi.metricsmgr.sink.SinkContext;
/**
* TMasterSink Tester.
*/
public class TMasterSinkTest {
// Bean name to register the TMasterLocation object into SingletonRegistry
private static final String TMASTER_LOCATION_BEAN_NAME =
TopologyMaster.TMasterLocation.newBuilder().getDescriptorForType().getFullName();
private static final int RECONNECT_INTERVAL_SECONDS = 1;
private static final int RESTART_WAIT_INTERVAL_SECONDS = 5;
private static final int TMASTER_LOCATION_CHECK_INTERVAL_SECONDS = 1;
private static final int WAIT_SECONDS = 10;
@Before
public void before() throws Exception {
}
@After
@SuppressWarnings("unchecked")
public void after() throws Exception {
// Remove the Singleton by Reflection
Field field = SingletonRegistry.INSTANCE.getClass().getDeclaredField("singletonObjects");
field.setAccessible(true);
Map<String, Object> singletonObjects =
(Map<String, Object>) field.get(SingletonRegistry.INSTANCE);
singletonObjects.clear();
}
/**
* Test automatic recover from uncaught exceptions in TMasterClient
*/
@Test
public void testTMasterClientService() throws Exception {
// create a new TMasterClientService
TMasterSink tMasterSink = new TMasterSink();
Map<String, Object> serviceConfig = new HashMap<String, Object>();
// Fill with necessary config
serviceConfig.put("reconnect-interval-second", RECONNECT_INTERVAL_SECONDS);
serviceConfig.put("network-write-batch-size-bytes", 1);
serviceConfig.put("network-write-batch-time-ms", 1);
serviceConfig.put("network-read-batch-size-bytes", 1);
serviceConfig.put("network-read-batch-time-ms", 1);
serviceConfig.put("socket-send-buffer-size-bytes", 1);
serviceConfig.put("socket-received-buffer-size-bytes", 1);
tMasterSink.createSimpleTMasterClientService(serviceConfig);
// Notice here we set host and port as invalid values
// So TMaster would throw "java.nio.channels.UnresolvedAddressException" once it starts,
// and then dies
TopologyMaster.TMasterLocation location = TopologyMaster.TMasterLocation.newBuilder().
setTopologyName("topology-name").setTopologyId("topology-id").setHost("host").
setControllerPort(0).setMasterPort(0).setStatsPort(0).build();
tMasterSink.startNewTMasterClient(location);
// We wait for a while to let auto recover fully finish.
Thread.sleep(RESTART_WAIT_INTERVAL_SECONDS * 1000);
// Then we check whether the TMasterService has restarted the TMasterClient for several times
// Take other factors into account, we would check whether the TMasterClient has restarted
// at least half the RESTART_WAIT_INTERVAL_SECONDS/RECONNECT_INTERVAL_SECONDS
Assert.assertTrue(tMasterSink.getTMasterStartedAttempts()
> (RESTART_WAIT_INTERVAL_SECONDS / RECONNECT_INTERVAL_SECONDS / 2));
tMasterSink.close();
}
/**
* Test whether TMasterSink would handle TMasterLocation in SingletonRegistry automatically
*/
@Test
public void testHandleTMasterLocation() throws Exception {
// create a new TMasterClientService
TMasterSink tMasterSink = new TMasterSink();
Map<String, Object> sinkConfig = new HashMap<String, Object>();
// Fill with necessary config
sinkConfig.put("tmaster-location-check-interval-sec", TMASTER_LOCATION_CHECK_INTERVAL_SECONDS);
// These are config for TMasterClient
Map<String, Object> serviceConfig = new HashMap<String, Object>();
serviceConfig.put("reconnect-interval-second", RECONNECT_INTERVAL_SECONDS);
serviceConfig.put("network-write-batch-size-bytes", 1);
serviceConfig.put("network-write-batch-time-ms", 1);
serviceConfig.put("network-read-batch-size-bytes", 1);
serviceConfig.put("network-read-batch-time-ms", 1);
serviceConfig.put("socket-send-buffer-size-bytes", 1);
serviceConfig.put("socket-received-buffer-size-bytes", 1);
sinkConfig.put("tmaster-client", serviceConfig);
// It is null since we have not set it
Assert.assertNull(tMasterSink.getCurrentTMasterLocation());
SinkContext sinkContext =
new SinkContextImpl("topology-name", "metricsmgr-id", "sink-id", new MultiCountMetric());
// Start the TMasterSink
tMasterSink.init(sinkConfig, sinkContext);
// Put the TMasterLocation into SingletonRegistry
TopologyMaster.TMasterLocation oldLoc = TopologyMaster.TMasterLocation.newBuilder().
setTopologyName("topology-name").setTopologyId("topology-id").
setHost("host").setControllerPort(0).setMasterPort(0).build();
SingletonRegistry.INSTANCE.registerSingleton(TMASTER_LOCATION_BEAN_NAME, oldLoc);
Thread.sleep(WAIT_SECONDS * 1000);
// The TMasterService should start
Assert.assertTrue(tMasterSink.getTMasterStartedAttempts() > 0);
Assert.assertEquals(oldLoc, tMasterSink.getCurrentTMasterLocation());
Assert.assertEquals(oldLoc, tMasterSink.getCurrentTMasterLocationInService());
// Update it, the TMasterSink should pick up the new one.
TopologyMaster.TMasterLocation newLoc = TopologyMaster.TMasterLocation.newBuilder().
setTopologyName("topology-name").setTopologyId("topology-id").
setHost("host").setControllerPort(0).setMasterPort(1).build();
SingletonRegistry.INSTANCE.updateSingleton(TMASTER_LOCATION_BEAN_NAME, newLoc);
int lastTMasterStartedAttempts = tMasterSink.getTMasterStartedAttempts();
Thread.sleep(WAIT_SECONDS * 1000);
// The TMasterService should use the new TMasterLocation
Assert.assertTrue(tMasterSink.getTMasterStartedAttempts() > lastTMasterStartedAttempts);
Assert.assertNotSame(oldLoc, tMasterSink.getCurrentTMasterLocation());
Assert.assertNotSame(oldLoc, tMasterSink.getCurrentTMasterLocationInService());
Assert.assertEquals(newLoc, tMasterSink.getCurrentTMasterLocation());
Assert.assertEquals(newLoc, tMasterSink.getCurrentTMasterLocationInService());
tMasterSink.close();
}
}