/*
* Copyright (c) 2011,2013 Big Switch Networks, Inc.
* Originally created by David Erickson, Stanford University
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.sdnplatform.core.util;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Test;
import org.sdnplatform.core.util.SingletonTask;
import org.sdnplatform.test.PlatformTestCase;
public class SingletonTaskTest extends PlatformTestCase {
public int ran = 0;
public int finished = 0;
public long time = 0;
@Before
public void setUp() throws Exception {
super.setUp();
ran = 0;
finished = 0;
time = 0;
}
@Test
public void testBasic() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
ran += 1;
}
});
st1.reschedule(0, null);
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
assertEquals("Check that task ran", 1, ran);
}
@Test
public void testDelay() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
ran += 1;
time = System.nanoTime();
}
});
long start = System.nanoTime();
st1.reschedule(10, TimeUnit.MILLISECONDS);
assertFalse("Check that task hasn't run yet", ran > 0);
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
assertEquals("Check that task ran", 1, ran);
assertTrue("Check that time passed appropriately",
(time - start) >= TimeUnit.NANOSECONDS.convert(10, TimeUnit.MILLISECONDS));
}
@Test
public void testReschedule() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
final Object tc = this;
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
synchronized (tc) {
ran += 1;
}
time = System.nanoTime();
}
});
long start = System.nanoTime();
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
st1.reschedule(20, TimeUnit.MILLISECONDS);
Thread.sleep(5);
assertFalse("Check that task hasn't run yet", ran > 0);
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
assertEquals("Check that task ran only once", 1, ran);
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) >= TimeUnit.NANOSECONDS.convert(55, TimeUnit.MILLISECONDS));
}
@Test
public void testConcurrentAddDelay() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
final Object tc = this;
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
synchronized (tc) {
ran += 1;
}
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
synchronized (tc) {
finished += 1;
time = System.nanoTime();
}
}
});
long start = System.nanoTime();
st1.reschedule(5, TimeUnit.MILLISECONDS);
Thread.sleep(20);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
st1.reschedule(75, TimeUnit.MILLISECONDS);
assertTrue("Check task running state true", st1.context.taskRunning);
assertTrue("Check task should run state true", st1.context.taskShouldRun);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
Thread.sleep(150);
assertTrue("Check task running state false", !st1.context.taskRunning);
assertTrue("Check task should run state false", !st1.context.taskShouldRun);
assertEquals("Check that task ran exactly twice", 2, ran);
assertEquals("Check that task finished exactly twice", 2, finished);
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) >= TimeUnit.NANOSECONDS.convert(130, TimeUnit.MILLISECONDS));
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) <= TimeUnit.NANOSECONDS.convert(160, TimeUnit.MILLISECONDS));
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
}
@Test
public void testConcurrentAddDelay2() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
final Object tc = this;
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
synchronized (tc) {
ran += 1;
}
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
synchronized (tc) {
finished += 1;
time = System.nanoTime();
}
}
});
long start = System.nanoTime();
st1.reschedule(5, TimeUnit.MILLISECONDS);
Thread.sleep(20);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
st1.reschedule(25, TimeUnit.MILLISECONDS);
assertTrue("Check task running state true", st1.context.taskRunning);
assertTrue("Check task should run state true", st1.context.taskShouldRun);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
Thread.sleep(150);
assertTrue("Check task running state false", !st1.context.taskRunning);
assertTrue("Check task should run state false", !st1.context.taskShouldRun);
assertEquals("Check that task ran exactly twice", 2, ran);
assertEquals("Check that task finished exactly twice", 2, finished);
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) >= TimeUnit.NANOSECONDS.convert(100, TimeUnit.MILLISECONDS));
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) <= TimeUnit.NANOSECONDS.convert(125, TimeUnit.MILLISECONDS));
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
}
@Test
public void testConcurrentAddNoDelay() throws InterruptedException {
ScheduledExecutorService ses =
Executors.newSingleThreadScheduledExecutor();
final Object tc = this;
SingletonTask st1 = new SingletonTask(ses, new Runnable() {
@Override
public void run() {
synchronized (tc) {
ran += 1;
}
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
synchronized (tc) {
finished += 1;
time = System.nanoTime();
}
}
});
long start = System.nanoTime();
st1.reschedule(0, null);
Thread.sleep(20);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
st1.reschedule(0, null);
assertTrue("Check task running state true", st1.context.taskRunning);
assertTrue("Check task should run state true", st1.context.taskShouldRun);
assertEquals("Check that task started", 1, ran);
assertEquals("Check that task not finished", 0, finished);
Thread.sleep(150);
assertTrue("Check task running state false", !st1.context.taskRunning);
assertTrue("Check task should run state false", !st1.context.taskShouldRun);
assertEquals("Check that task ran exactly twice", 2, ran);
assertEquals("Check that task finished exactly twice", 2, finished);
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) >= TimeUnit.NANOSECONDS.convert(90, TimeUnit.MILLISECONDS));
assertTrue("Check that time passed appropriately: " + (time - start),
(time - start) <= TimeUnit.NANOSECONDS.convert(130, TimeUnit.MILLISECONDS));
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
}
}