/**
* 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 org.apache.aurora.scheduler;
import java.util.Map;
import com.google.common.base.Optional;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import com.twitter.common.stats.Stat;
import com.twitter.common.stats.StatsProvider;
import com.twitter.common.testing.easymock.EasyMockTest;
import org.apache.aurora.gen.AssignedTask;
import org.apache.aurora.gen.Attribute;
import org.apache.aurora.gen.HostAttributes;
import org.apache.aurora.gen.Identity;
import org.apache.aurora.gen.JobKey;
import org.apache.aurora.gen.ScheduleStatus;
import org.apache.aurora.gen.ScheduledTask;
import org.apache.aurora.gen.TaskConfig;
import org.apache.aurora.scheduler.base.Tasks;
import org.apache.aurora.scheduler.events.PubsubEvent.TaskStateChange;
import org.apache.aurora.scheduler.events.PubsubEvent.TasksDeleted;
import org.apache.aurora.scheduler.storage.entities.IHostAttributes;
import org.apache.aurora.scheduler.storage.entities.IScheduledTask;
import org.apache.aurora.scheduler.storage.testing.StorageTestUtil;
import org.easymock.EasyMock;
import org.easymock.IAnswer;
import org.easymock.IExpectationSetters;
import org.junit.Before;
import org.junit.Test;
import static org.apache.aurora.gen.ScheduleStatus.ASSIGNED;
import static org.apache.aurora.gen.ScheduleStatus.FAILED;
import static org.apache.aurora.gen.ScheduleStatus.FINISHED;
import static org.apache.aurora.gen.ScheduleStatus.INIT;
import static org.apache.aurora.gen.ScheduleStatus.LOST;
import static org.apache.aurora.gen.ScheduleStatus.PENDING;
import static org.apache.aurora.gen.ScheduleStatus.RUNNING;
import static org.apache.aurora.scheduler.TaskVars.jobStatName;
import static org.apache.aurora.scheduler.TaskVars.rackStatName;
import static org.easymock.EasyMock.expect;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class TaskVarsTest extends EasyMockTest {
private static final String ROLE_A = "role_a";
private static final String JOB_A = "job_a";
private static final String JOB_B = "job_b";
private static final String TASK_ID = "task_id";
private static final String ENV = "test";
private StorageTestUtil storageUtil;
private StatsProvider trackedProvider;
private StatsProvider untrackedProvider;
private TaskVars vars;
private Map<String, Supplier<Long>> globalCounters;
@Before
public void setUp() {
storageUtil = new StorageTestUtil(this);
trackedProvider = createMock(StatsProvider.class);
untrackedProvider = createMock(StatsProvider.class);
expect(trackedProvider.untracked()).andReturn(untrackedProvider);
storageUtil.expectOperations();
globalCounters = Maps.newHashMap();
}
private void replayAndBuild() {
control.replay();
vars = new TaskVars(storageUtil.storage, trackedProvider);
}
private void expectStatExport(String name) {
expectStatExport(name, trackedProvider);
}
private void expectStatExport(final String name, StatsProvider provider) {
expect(provider.makeGauge(EasyMock.eq(name), EasyMock.<Supplier<Long>>anyObject()))
.andAnswer(new IAnswer<Stat<Long>>() {
@SuppressWarnings("unchecked")
@Override
public Stat<Long> answer() {
assertFalse(globalCounters.containsKey(name));
globalCounters.put(name, (Supplier<Long>) EasyMock.getCurrentArguments()[1]);
return null;
}
});
}
private void expectStatusCountersInitialized() {
for (ScheduleStatus status : ScheduleStatus.values()) {
expectStatExport(TaskVars.getVarName(status));
}
}
private void changeState(IScheduledTask task, ScheduleStatus status) {
vars.taskChangedState(TaskStateChange.transition(
IScheduledTask.build(task.newBuilder().setStatus(status)),
task.getStatus()));
}
private void schedulerActivated(IScheduledTask... initialTasks) {
for (IScheduledTask task : initialTasks) {
vars.taskChangedState(TaskStateChange.initialized(task));
}
vars.startAsync().awaitRunning();
}
private IScheduledTask makeTask(String job, ScheduleStatus status, String host) {
ScheduledTask task = new ScheduledTask()
.setStatus(status)
.setAssignedTask(new AssignedTask()
.setTaskId(TASK_ID)
.setTask(new TaskConfig()
.setJob(new JobKey(ROLE_A, ENV, job))
.setJobName(job)
.setEnvironment(ENV)
.setOwner(new Identity(ROLE_A, ROLE_A + "-user"))));
if (Tasks.SLAVE_ASSIGNED_STATES.contains(status) || Tasks.isTerminated(status)) {
task.getAssignedTask().setSlaveHost(host);
}
return IScheduledTask.build(task);
}
private IScheduledTask makeTask(String job, ScheduleStatus status) {
return makeTask(job, status, "hostA");
}
private void assertAllZero() {
for (Supplier<Long> counter : globalCounters.values()) {
assertEquals(0L, counter.get().longValue());
}
}
@Test
public void testStartsAtZero() {
expectStatusCountersInitialized();
replayAndBuild();
schedulerActivated();
assertAllZero();
}
@Test
public void testNoEarlyExport() {
replayAndBuild();
// No variables should be exported since schedulerActive is never called.
IScheduledTask taskA = makeTask(JOB_A, INIT);
changeState(taskA, PENDING);
changeState(IScheduledTask.build(taskA.newBuilder().setStatus(PENDING)), ASSIGNED);
}
private int getValue(String name) {
return globalCounters.get(name).get().intValue();
}
private int getValue(ScheduleStatus status) {
return getValue(TaskVars.getVarName(status));
}
@Test
public void testTaskLifeCycle() {
expectStatusCountersInitialized();
IScheduledTask taskA = makeTask(JOB_A, INIT);
expectGetHostRack("hostA", "rackA").atLeastOnce();
expectStatExport(rackStatName("rackA"));
replayAndBuild();
schedulerActivated();
changeState(makeTask(JOB_A, INIT), PENDING);
assertEquals(1, getValue(PENDING));
changeState(IScheduledTask.build(taskA.newBuilder().setStatus(PENDING)), ASSIGNED);
assertEquals(0, getValue(PENDING));
assertEquals(1, getValue(ASSIGNED));
taskA = makeTask(JOB_A, ASSIGNED, "hostA");
changeState(IScheduledTask.build(taskA.newBuilder().setStatus(ASSIGNED)), RUNNING);
assertEquals(0, getValue(ASSIGNED));
assertEquals(1, getValue(RUNNING));
changeState(IScheduledTask.build(taskA.newBuilder().setStatus(RUNNING)), FINISHED);
assertEquals(0, getValue(RUNNING));
assertEquals(1, getValue(FINISHED));
assertEquals(0, getValue(rackStatName("rackA")));
vars.tasksDeleted(new TasksDeleted(ImmutableSet.of(
IScheduledTask.build(taskA.newBuilder().setStatus(FINISHED)))));
assertAllZero();
}
@Test
public void testLoadsFromStorage() {
expectStatusCountersInitialized();
expectGetHostRack("hostA", "rackA").atLeastOnce();
expectGetHostRack("hostB", "rackB").atLeastOnce();
expectStatExport(rackStatName("rackA"));
expectStatExport(rackStatName("rackB"));
IScheduledTask failedTask = makeTask(JOB_B, FAILED, "hostB");
expectStatExport(jobStatName(failedTask, FAILED), untrackedProvider);
replayAndBuild();
schedulerActivated(
makeTask(JOB_A, PENDING),
makeTask(JOB_A, RUNNING, "hostA"),
makeTask(JOB_A, FINISHED, "hostA"),
makeTask(JOB_B, PENDING),
failedTask);
assertEquals(2, getValue(PENDING));
assertEquals(1, getValue(RUNNING));
assertEquals(1, getValue(FINISHED));
assertEquals(1, getValue(FAILED));
assertEquals(0, getValue(rackStatName("rackA")));
assertEquals(0, getValue(rackStatName("rackB")));
assertEquals(1, getValue(jobStatName(failedTask, FAILED)));
}
private IExpectationSetters<?> expectGetHostRack(String host, String rackToReturn) {
IHostAttributes attributes = IHostAttributes.build(new HostAttributes()
.setHost(host)
.setAttributes(ImmutableSet.of(
new Attribute().setName("rack").setValues(ImmutableSet.of(rackToReturn)))));
return expect(storageUtil.attributeStore.getHostAttributes(host))
.andReturn(Optional.of(attributes));
}
@Test
public void testLostCounters() {
expectStatusCountersInitialized();
expectGetHostRack("host1", "rackA").atLeastOnce();
expectGetHostRack("host2", "rackB").atLeastOnce();
expectGetHostRack("host3", "rackB").atLeastOnce();
expectStatExport(rackStatName("rackA"));
expectStatExport(rackStatName("rackB"));
IScheduledTask a = makeTask("jobA", RUNNING, "host1");
IScheduledTask b = makeTask("jobB", RUNNING, "host2");
IScheduledTask c = makeTask("jobD", RUNNING, "host3");
IScheduledTask d = makeTask("jobD", RUNNING, "host1");
expectStatExport(jobStatName(a, LOST), untrackedProvider);
expectStatExport(jobStatName(b, LOST), untrackedProvider);
expectStatExport(jobStatName(c, LOST), untrackedProvider);
replayAndBuild();
schedulerActivated();
changeState(a, LOST);
changeState(b, LOST);
changeState(c, LOST);
changeState(d, LOST);
assertEquals(2, getValue(rackStatName("rackA")));
assertEquals(2, getValue(rackStatName("rackB")));
assertEquals(1, getValue(jobStatName(a, LOST)));
assertEquals(1, getValue(jobStatName(b, LOST)));
assertEquals(2, getValue(jobStatName(c, LOST)));
}
@Test
public void testRackMissing() {
expectStatusCountersInitialized();
expect(storageUtil.attributeStore.getHostAttributes("a"))
.andReturn(Optional.<IHostAttributes>absent());
IScheduledTask a = makeTask(JOB_A, RUNNING, "a");
expectStatExport(jobStatName(a, LOST), untrackedProvider);
replayAndBuild();
schedulerActivated();
changeState(a, LOST);
// Since no attributes are stored for the host, a variable is not exported/updated.
}
}