/**
* Copyright 2013 Netflix, Inc.
*
* 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.netflix.servo.monitor;
import com.google.common.collect.Lists;
import com.netflix.servo.DefaultMonitorRegistry;
import com.netflix.servo.tag.BasicTagList;
import com.netflix.servo.tag.TagList;
import org.testng.annotations.Test;
import java.util.List;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class TimedInterfaceTest {
/**
* Dummy interface to test our timer.
*/
private interface IDummy {
void method1();
boolean method2(int n);
Object method3(Object a, Object b);
}
private interface IDummyExtended extends IDummy {
void method4();
}
private static class DummyImpl implements IDummy {
private void sleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException ignored) {
// Ignored
}
}
@Override
public void method1() {
sleep(20);
}
@Override
public boolean method2(int n) {
sleep(40);
return n > 0;
}
@Override
public Object method3(Object a, Object b) {
sleep(60);
return a;
}
}
private static class ExtendedDummy extends DummyImpl implements IDummyExtended {
@Override
public void method4() {
// do nothing
}
}
@SuppressWarnings("unchecked")
@Test
public void testTimedInterface() {
final IDummy dummy = TimedInterface.newProxy(IDummy.class, new DummyImpl(), "id");
final CompositeMonitor<Long> compositeMonitor = (CompositeMonitor<Long>) dummy;
final List<Monitor<?>> monitors = compositeMonitor.getMonitors();
assertEquals(monitors.size(), 3);
assertEquals(compositeMonitor.getValue().longValue(), 3L);
// you'd register the CompositeMonitor as:
DefaultMonitorRegistry.getInstance().register((CompositeMonitor) dummy);
for (int i = 0; i < 42; i++) {
dummy.method1();
if (i % 2 == 0) {
dummy.method2(i);
}
}
final TagList tagList = BasicTagList.of(
TimedInterface.CLASS_TAG, "DummyImpl",
TimedInterface.INTERFACE_TAG, "IDummy",
TimedInterface.ID_TAG, "id");
final MonitorConfig expectedConfig = MonitorConfig.builder(TimedInterface.TIMED_INTERFACE)
.withTags(tagList).build();
assertEquals(compositeMonitor.getConfig(), expectedConfig);
for (Monitor<?> monitor : monitors) {
final MonitorConfig config = monitor.getConfig();
final String method = config.getName();
final MonitorConfig expected = MonitorConfig.builder(method).withTags(tagList).build();
assertEquals(config, expected);
if (method.equals("method1")) {
// expected result is 20, but let's give it a fudge factor to account for
// slow machines
long value = ((Monitor<Long>) monitor).getValue() - 20;
assertTrue(value >= 0 && value <= 9);
} else if (method.equals("method2")) {
// expected result is 40, but let's give it a fudge factor to account for
// slow machines
long value = ((Monitor<Long>) monitor).getValue() - 40;
assertTrue(value >= 0 && value <= 9);
} else {
assertEquals(method, "method3");
long value = ((Monitor<Long>) monitor).getValue();
assertEquals(value, 0);
}
}
}
@SuppressWarnings("unchecked")
@Test
public void testTimedInterfaceNoId() {
final IDummy dummy = TimedInterface.newProxy(IDummy.class, new DummyImpl());
// you'd register the CompositeMonitor as:
DefaultMonitorRegistry.getInstance().register((CompositeMonitor) dummy);
final CompositeMonitor<Long> compositeMonitor = (CompositeMonitor<Long>) dummy;
final TagList tagList = BasicTagList.of(
TimedInterface.CLASS_TAG, "DummyImpl",
TimedInterface.INTERFACE_TAG, "IDummy");
final MonitorConfig expectedConfig = MonitorConfig.builder(TimedInterface.TIMED_INTERFACE)
.withTags(tagList).build();
assertEquals(compositeMonitor.getConfig(), expectedConfig);
}
@SuppressWarnings("unchecked")
@Test
public void testInterfaceInheritence() {
final List<String> expectedNames = Lists.newArrayList("method1", "method2",
"method3", "method4");
final IDummyExtended extendedDummy = TimedInterface.newProxy(IDummyExtended.class,
new ExtendedDummy());
final CompositeMonitor<Long> compositeMonitor = (CompositeMonitor<Long>) extendedDummy;
DefaultMonitorRegistry.getInstance().register(compositeMonitor);
assertEquals(compositeMonitor.getMonitors().size(), 4);
assertEquals(compositeMonitor.getValue().longValue(), 4L);
assertEquals(compositeMonitor.getValue(100).longValue(), 4L);
final List<Monitor<?>> monitors = compositeMonitor.getMonitors();
for (Monitor<?> monitor : monitors) {
assertTrue(expectedNames.contains(monitor.getConfig().getName()));
}
}
}