added PeriodicTrigger implementation
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Mark Fisher
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/*
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* Copyright 2002-2009 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.scheduling.support;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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import java.util.Date;
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import java.util.concurrent.TimeUnit;
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import org.junit.Test;
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import org.springframework.scheduling.TriggerContext;
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import org.springframework.util.NumberUtils;
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/**
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* @author Mark Fisher
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* @since 3.0
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*/
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public class PeriodicTriggerTests {
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@Test
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public void fixedDelayFirstExecution() {
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Date now = new Date();
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PeriodicTrigger trigger = new PeriodicTrigger(5000);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertNegligibleDifference(now, next);
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}
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@Test
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public void fixedDelayWithInitialDelayFirstExecution() {
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Date now = new Date();
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long period = 5000;
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long initialDelay = 30000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertApproximateDifference(now, next, initialDelay);
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}
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@Test
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public void fixedDelayWithTimeUnitFirstExecution() {
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Date now = new Date();
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PeriodicTrigger trigger = new PeriodicTrigger(5, TimeUnit.SECONDS);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertNegligibleDifference(now, next);
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}
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@Test
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public void fixedDelayWithTimeUnitAndInitialDelayFirstExecution() {
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Date now = new Date();
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long period = 5;
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long initialDelay = 30;
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PeriodicTrigger trigger = new PeriodicTrigger(period, TimeUnit.SECONDS);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertApproximateDifference(now, next, initialDelay * 1000);
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}
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@Test
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public void fixedDelaySubsequentExecution() {
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Date now = new Date();
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long period = 5000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, period + 3000);
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}
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@Test
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public void fixedDelayWithInitialDelaySubsequentExecution() {
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Date now = new Date();
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long period = 5000;
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long initialDelay = 30000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, period + 3000);
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}
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@Test
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public void fixedDelayWithTimeUnitSubsequentExecution() {
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Date now = new Date();
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long period = 5;
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PeriodicTrigger trigger = new PeriodicTrigger(period, TimeUnit.SECONDS);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, (period * 1000) + 3000);
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}
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@Test
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public void fixedRateFirstExecution() {
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Date now = new Date();
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PeriodicTrigger trigger = new PeriodicTrigger(5000);
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trigger.setFixedRate(true);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertNegligibleDifference(now, next);
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}
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@Test
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public void fixedRateWithTimeUnitFirstExecution() {
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Date now = new Date();
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PeriodicTrigger trigger = new PeriodicTrigger(5, TimeUnit.SECONDS);
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trigger.setFixedRate(true);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertNegligibleDifference(now, next);
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}
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@Test
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public void fixedRateWithInitialDelayFirstExecution() {
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Date now = new Date();
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long period = 5000;
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long initialDelay = 30000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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trigger.setFixedRate(true);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertApproximateDifference(now, next, initialDelay);
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}
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@Test
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public void fixedRateWithTimeUnitAndInitialDelayFirstExecution() {
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Date now = new Date();
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long period = 5;
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long initialDelay = 30;
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PeriodicTrigger trigger = new PeriodicTrigger(period, TimeUnit.MINUTES);
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trigger.setFixedRate(true);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(null, null, null));
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assertApproximateDifference(now, next, (initialDelay * 60 * 1000));
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}
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@Test
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public void fixedRateSubsequentExecution() {
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Date now = new Date();
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long period = 5000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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trigger.setFixedRate(true);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, period);
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}
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@Test
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public void fixedRateWithInitialDelaySubsequentExecution() {
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Date now = new Date();
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long period = 5000;
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long initialDelay = 30000;
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PeriodicTrigger trigger = new PeriodicTrigger(period);
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trigger.setFixedRate(true);
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trigger.setInitialDelay(initialDelay);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, period);
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}
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@Test
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public void fixedRateWithTimeUnitSubsequentExecution() {
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Date now = new Date();
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long period = 5;
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PeriodicTrigger trigger = new PeriodicTrigger(period, TimeUnit.HOURS);
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trigger.setFixedRate(true);
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Date next = trigger.nextExecutionTime(context(now, 500, 3000));
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assertApproximateDifference(now, next, (period * 60 * 60 * 1000));
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}
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@Test
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public void equalsVerification() {
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PeriodicTrigger trigger1 = new PeriodicTrigger(3000);
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PeriodicTrigger trigger2 = new PeriodicTrigger(3000);
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assertFalse(trigger1.equals(new String("not a trigger")));
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assertFalse(trigger1.equals(null));
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assertEquals(trigger1, trigger1);
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assertEquals(trigger2, trigger2);
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assertEquals(trigger1, trigger2);
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trigger2.setInitialDelay(1234);
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assertFalse(trigger1.equals(trigger2));
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assertFalse(trigger2.equals(trigger1));
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trigger1.setInitialDelay(1234);
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assertEquals(trigger1, trigger2);
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trigger2.setFixedRate(true);
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assertFalse(trigger1.equals(trigger2));
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assertFalse(trigger2.equals(trigger1));
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trigger1.setFixedRate(true);
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assertEquals(trigger1, trigger2);
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PeriodicTrigger trigger3 = new PeriodicTrigger(3, TimeUnit.SECONDS);
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trigger3.setInitialDelay(7);
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trigger3.setFixedRate(true);
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assertFalse(trigger1.equals(trigger3));
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assertFalse(trigger3.equals(trigger1));
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trigger1.setInitialDelay(7000);
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assertEquals(trigger1, trigger3);
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}
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// utility methods
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private static void assertNegligibleDifference(Date d1, Date d2) {
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long diff = Math.abs(d1.getTime() - d2.getTime());
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assertTrue("difference exceeds threshold: " + diff, diff < 100);
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}
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private static void assertApproximateDifference(Date lesser, Date greater, long expected) {
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long diff = greater.getTime() - lesser.getTime();
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long variance = Math.abs(expected - diff);
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assertTrue("expected approximate difference of " + expected +
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", but actual difference was " + diff, variance < 100);
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}
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private static TriggerContext context(Object scheduled, Object actual, Object completion) {
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return new TestTriggerContext(asDate(scheduled), asDate(actual), asDate(completion));
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}
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private static Date asDate(Object o) {
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if (o == null) {
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return null;
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}
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if (o instanceof Date) {
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return (Date) o;
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}
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if (o instanceof Number) {
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return new Date(System.currentTimeMillis() +
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NumberUtils.convertNumberToTargetClass((Number) o, Long.class));
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}
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throw new IllegalArgumentException(
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"expected Date or Number, but actual type was: " + o.getClass());
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}
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// helper class
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private static class TestTriggerContext implements TriggerContext {
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private final Date scheduled;
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private final Date actual;
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private final Date completion;
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TestTriggerContext(Date scheduled, Date actual, Date completion) {
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this.scheduled = scheduled;
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this.actual = actual;
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this.completion = completion;
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}
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public Date lastActualExecutionTime() {
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return this.actual;
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}
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public Date lastCompletionTime() {
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return this.completion;
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}
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public Date lastScheduledExecutionTime() {
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return this.scheduled;
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}
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}
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}
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