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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.brooklyn.policy.ha;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.fail;
import java.util.List;
import java.util.Set;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.api.entity.EntitySpec;
import org.apache.brooklyn.api.location.Location;
import org.apache.brooklyn.api.location.LocationSpec;
import org.apache.brooklyn.api.policy.PolicySpec;
import org.apache.brooklyn.api.sensor.EnricherSpec;
import org.apache.brooklyn.api.sensor.Sensor;
import org.apache.brooklyn.api.sensor.SensorEvent;
import org.apache.brooklyn.api.sensor.SensorEventListener;
import org.apache.brooklyn.core.entity.Entities;
import org.apache.brooklyn.core.entity.lifecycle.Lifecycle;
import org.apache.brooklyn.core.entity.lifecycle.ServiceStateLogic;
import org.apache.brooklyn.core.location.SimulatedLocation;
import org.apache.brooklyn.core.mgmt.rebind.RebindTestFixtureWithApp;
import org.apache.brooklyn.core.test.entity.TestApplication;
import org.apache.brooklyn.core.test.entity.TestEntity;
import org.apache.brooklyn.entity.group.DynamicCluster;
import org.apache.brooklyn.test.Asserts;
import org.apache.brooklyn.util.collections.MutableMap;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import org.apache.brooklyn.policy.ha.HASensors.FailureDescriptor;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
public class HaPolicyRebindTest extends RebindTestFixtureWithApp {
private TestEntity origEntity;
private SensorEventListener<FailureDescriptor> eventListener;
private List<SensorEvent<FailureDescriptor>> events;
@Override
@BeforeMethod(alwaysRun=true)
public void setUp() throws Exception {
super.setUp();
origEntity = origApp.createAndManageChild(EntitySpec.create(TestEntity.class));
events = Lists.newCopyOnWriteArrayList();
eventListener = new SensorEventListener<FailureDescriptor>() {
@Override public void onEvent(SensorEvent<FailureDescriptor> event) {
events.add(event);
}
};
}
@Test
public void testServiceRestarterWorksAfterRebind() throws Exception {
origEntity.policies().add(PolicySpec.create(ServiceRestarter.class)
.configure(ServiceRestarter.FAILURE_SENSOR_TO_MONITOR, HASensors.ENTITY_FAILED));
TestApplication newApp = rebind();
final TestEntity newEntity = (TestEntity) Iterables.find(newApp.getChildren(), Predicates.instanceOf(TestEntity.class));
newEntity.sensors().emit(HASensors.ENTITY_FAILED, new FailureDescriptor(origEntity, "simulate failure"));
Asserts.succeedsEventually(new Runnable() {
@Override public void run() {
assertEquals(newEntity.getCallHistory(), ImmutableList.of("restart"));
}});
}
@Test
public void testServiceReplacerWorksAfterRebind() throws Exception {
Location origLoc = origManagementContext.getLocationManager().createLocation(LocationSpec.create(SimulatedLocation.class));
DynamicCluster origCluster = origApp.createAndManageChild(EntitySpec.create(DynamicCluster.class)
.configure(DynamicCluster.MEMBER_SPEC, EntitySpec.create(TestEntity.class))
.configure(DynamicCluster.INITIAL_SIZE, 3));
origApp.start(ImmutableList.<Location>of(origLoc));
origCluster.policies().add(PolicySpec.create(ServiceReplacer.class)
.configure(ServiceReplacer.FAILURE_SENSOR_TO_MONITOR, HASensors.ENTITY_FAILED));
// rebind
TestApplication newApp = rebind();
final DynamicCluster newCluster = (DynamicCluster) Iterables.find(newApp.getChildren(), Predicates.instanceOf(DynamicCluster.class));
// stimulate the policy
final Set<Entity> initialMembers = ImmutableSet.copyOf(newCluster.getMembers());
final TestEntity e1 = (TestEntity) Iterables.get(initialMembers, 1);
newApp.getManagementContext().getSubscriptionManager().subscribe(e1, HASensors.ENTITY_FAILED, eventListener);
newApp.getManagementContext().getSubscriptionManager().subscribe(e1, HASensors.ENTITY_RECOVERED, eventListener);
e1.sensors().emit(HASensors.ENTITY_FAILED, new FailureDescriptor(e1, "simulate failure"));
// Expect e1 to be replaced
Asserts.succeedsEventually(new Runnable() {
@Override public void run() {
Set<Entity> newMembers = Sets.difference(ImmutableSet.copyOf(newCluster.getMembers()), initialMembers);
Set<Entity> removedMembers = Sets.difference(initialMembers, ImmutableSet.copyOf(newCluster.getMembers()));
assertEquals(removedMembers, ImmutableSet.of(e1));
assertEquals(newMembers.size(), 1);
assertEquals(((TestEntity)Iterables.getOnlyElement(newMembers)).getCallHistory(), ImmutableList.of("start"));
// TODO e1 not reporting "start" after rebind because callHistory is a field rather than an attribute, so was not persisted
Asserts.assertEqualsIgnoringOrder(e1.getCallHistory(), ImmutableList.of("stop"));
assertFalse(Entities.isManaged(e1));
}});
}
@Test
public void testServiceFailureDetectorWorksAfterRebind() throws Exception {
origEntity.enrichers().add(EnricherSpec.create(ServiceFailureDetector.class));
// rebind
TestApplication newApp = rebind();
final TestEntity newEntity = (TestEntity) Iterables.find(newApp.getChildren(), Predicates.instanceOf(TestEntity.class));
newApp.getManagementContext().getSubscriptionManager().subscribe(newEntity, HASensors.ENTITY_FAILED, eventListener);
newEntity.sensors().set(TestEntity.SERVICE_UP, true);
ServiceStateLogic.setExpectedState(newEntity, Lifecycle.RUNNING);
// trigger the failure
newEntity.sensors().set(TestEntity.SERVICE_UP, false);
assertHasEventEventually(HASensors.ENTITY_FAILED, Predicates.<Object>equalTo(newEntity), null);
assertEquals(events.size(), 1, "events="+events);
}
private void assertHasEventEventually(final Sensor<?> sensor, final Predicate<Object> componentPredicate, final Predicate<? super CharSequence> descriptionPredicate) {
Asserts.succeedsEventually(MutableMap.of("timeout", TIMEOUT_MS), new Runnable() {
@Override public void run() {
assertHasEvent(sensor, componentPredicate, descriptionPredicate);
}});
}
private void assertHasEvent(Sensor<?> sensor, Predicate<Object> componentPredicate, Predicate<? super CharSequence> descriptionPredicate) {
for (SensorEvent<FailureDescriptor> event : events) {
if (event.getSensor().equals(sensor) &&
(componentPredicate == null || componentPredicate.apply(event.getValue().getComponent())) &&
(descriptionPredicate == null || descriptionPredicate.apply(event.getValue().getDescription()))) {
return;
}
}
fail("No matching "+sensor+" event found; events="+events);
}
}