/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. licenses this file
* to you 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.cloudera.flume.reporter;
import java.io.IOException;
import org.junit.Assert;
import org.junit.Test;
import com.cloudera.flume.core.Event;
import com.cloudera.flume.core.EventImpl;
import com.cloudera.flume.handlers.rolling.Tagger;
import com.cloudera.flume.reporter.aggregator.CounterSink;
import com.cloudera.flume.reporter.history.CountHistoryReporter;
import com.cloudera.flume.reporter.history.DumbTagger;
import com.cloudera.flume.util.MockClock;
import com.cloudera.util.Clock;
import com.cloudera.util.Pair;
/**
* This tests the time lining abilities of the history reporter.
*/
public class TestHistoryReporter {
Tagger t = new DumbTagger();
/**
* This version uses wall clock time to test roll over from one epoch to the
* next.
*/
@Test
public void testTestCountHistory() throws IOException, InterruptedException {
// have a huge period and just force them in the test.
CountHistoryReporter r = new CountHistoryReporter("test timeline", 5000000,
t);
r.open();
Event e = new EventImpl("Test message".getBytes());
// just a little forward to make things slighlty "out of sync"
// 3
r.append(e);
r.append(e);
r.append(e);
r.forcedRotate();
// 2
r.append(e);
r.append(e);
r.forcedRotate();
// 4
r.append(e);
r.append(e);
r.append(e);
r.append(e);
r.forcedRotate();
// 0 // this never registers!
r.forcedRotate();
// 1
r.append(e);
r.forcedRotate();
r.append(e);
long[] ans = { 3, 2, 4, 0, 1 };
int i = 0;
for (Pair<Long, CounterSink> p : r.getHistory()) {
System.out.printf("time: %,18d count: %8d\n", p.getLeft(), p.getRight()
.getCount());
Assert.assertEquals(ans[i], p.getRight().getCount());
i++;
}
r.close();
}
/**
* This version uses a mock clock to test roll over from one epoch to the
* next. We can check mock clock time as well to make sure it works.
* @throws InterruptedException
*/
@Test
public void testTestCountHistoryClocked() throws IOException, InterruptedException {
MockClock m = new MockClock(0);
Clock.setClock(m);
CountHistoryReporter r = new CountHistoryReporter("test timeline", 500, t);
r.open();
Event e = new EventImpl("Test message".getBytes());
// just a little forward to make things slighlty "out of sync"
// 3
r.append(e);
r.append(e);
r.append(e);
m.forward(501);
// 2
r.append(e);
r.append(e);
m.forward(501);
// 4
r.append(e);
r.append(e);
r.append(e);
r.append(e);
m.forward(501);
// 0 // this never registers!
m.forward(501);
// 1
r.append(e);
m.forward(501);
r.append(e);
long[] times = { 0, 501, 1002, 1503, 2004 };
long[] ans = { 3, 2, 4, 0, 1 };
int i = 0;
for (Pair<Long, CounterSink> p : r.getHistory()) {
System.out.printf("time: %8d count: %8d\n", p.getLeft(), p.getRight()
.getCount());
Assert.assertEquals(ans[i], p.getRight().getCount());
Assert.assertEquals((long) p.getLeft(), times[i]);
i++;
}
r.close();
}
}