/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
*
* 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.streams.local.counters;
import com.carrotsearch.randomizedtesting.RandomizedTest;
import com.carrotsearch.randomizedtesting.annotations.Repeat;
import org.joda.time.DateTime;
import org.junit.After;
import org.junit.Test;
import java.lang.management.ManagementFactory;
import javax.management.InstanceNotFoundException;
import javax.management.ObjectName;
/**
* Unit tests for {@link org.apache.streams.local.counters.StreamsTaskCounter}
*/
public class StreamsTaskCounterTest extends RandomizedTest {
private static final String MBEAN_ID = "test_id";
private static final String STREAM_ID = "test_stream";
private static long STREAM_START_TIME = (new DateTime()).getMillis();
/**
* Remove registered mbeans from previous tests
* @throws Exception
*/
@After
public void unregisterMXBean() throws Exception {
try {
ManagementFactory.getPlatformMBeanServer().unregisterMBean(new ObjectName(String.format(StreamsTaskCounter.NAME_TEMPLATE, MBEAN_ID, STREAM_ID, STREAM_START_TIME)));
} catch (InstanceNotFoundException ife) {
//No-op
}
}
/**
* Test constructor does not throw errors
*/
@Test
public void testConstructor() {
try {
new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
} catch (Throwable t) {
fail("Constructor threw error : "+t.getMessage());
}
}
/**
* Test emitted increments correctly and returns expected value
* @throws Exception
*/
@Test
@Repeat(iterations = 3)
public void testEmitted() throws Exception {
StreamsTaskCounter counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
int numIncrements = randomIntBetween(1, 100000);
for(int i=0; i < numIncrements; ++i) {
counter.incrementEmittedCount();
}
assertEquals(numIncrements, counter.getNumEmitted());
unregisterMXBean();
counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
numIncrements = randomIntBetween(1, 100000);
long total = 0;
for(int i=0; i < numIncrements; ++i) {
long delta = randomIntBetween(1, 100);
total += delta;
counter.incrementEmittedCount(delta);
}
assertEquals(total, counter.getNumEmitted());
}
/**
* Test received increments correctly and returns expected value
* @throws Exception
*/
@Test
@Repeat(iterations = 3)
public void testReceived() throws Exception {
StreamsTaskCounter counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
int numIncrements = randomIntBetween(1, 100000);
for(int i=0; i < numIncrements; ++i) {
counter.incrementReceivedCount();
}
assertEquals(numIncrements, counter.getNumReceived());
unregisterMXBean();
counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
numIncrements = randomIntBetween(1, 100000);
long total = 0;
for(int i=0; i < numIncrements; ++i) {
long delta = randomIntBetween(1, 100);
total += delta;
counter.incrementReceivedCount(delta);
}
assertEquals(total, counter.getNumReceived());
}
/**
* Test errors increments correctly and returns expected value
* @throws Exception
*/
@Test
@Repeat(iterations = 3)
public void testError() throws Exception {
StreamsTaskCounter counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
int numIncrements = randomIntBetween(1, 100000);
for(int i=0; i < numIncrements; ++i) {
counter.incrementErrorCount();
}
assertEquals(numIncrements, counter.getNumUnhandledErrors());
unregisterMXBean();
counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
numIncrements = randomIntBetween(1, 100000);
long total = 0;
for(int i=0; i < numIncrements; ++i) {
long delta = randomIntBetween(1, 100);
total += delta;
counter.incrementErrorCount(delta);
}
assertEquals(total, counter.getNumUnhandledErrors());
}
/**
* Test error rate returns expected value
* @throws Exception
*/
@Test
@Repeat(iterations = 3)
public void testErrorRate() throws Exception {
StreamsTaskCounter counter = new StreamsTaskCounter(MBEAN_ID, STREAM_ID, STREAM_START_TIME);
assertEquals(0.0, counter.getErrorRate(), 0);
int failures = randomIntBetween(0, 100000);
int received = randomIntBetween(0, 100000);
counter.incrementReceivedCount(received);
counter.incrementErrorCount(failures);
assertEquals((double)failures / (double)(received), counter.getErrorRate(), 0);
}
}