/*
*
* Copyright 2013 LinkedIn Corp. All rights reserved
*
* 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.linkedin.databus.core;
import junit.framework.Assert;
import java.io.ByteArrayOutputStream;
import java.nio.channels.Channels;
import java.nio.channels.WritableByteChannel;
import java.util.Vector;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import com.linkedin.databus.core.DbusEventBuffer.AllocationPolicy;
import com.linkedin.databus.core.DbusEventBuffer.QueuePolicy;
import com.linkedin.databus.core.DbusEventBuffer.StreamingMode;
import com.linkedin.databus.core.test.DbusEventAppender;
import com.linkedin.databus.core.test.DbusEventGenerator;
import com.linkedin.databus.core.util.UncaughtExceptionTrackingThread;
import com.linkedin.databus2.core.AssertLevel;
import com.linkedin.databus2.core.filter.AllowAllDbusFilter;
import com.linkedin.databus2.test.TestUtil;
/**
* Test cases centered around DbusEventBuffer.streamEvents()
*/
public class TestDbusEventBufferStreamEvents
{
@BeforeClass
public void setUp()
{
TestUtil.setupLoggingWithTimestampedFile(true, "/tmp/TestDbusEventBufferStreamEvents_",
".log", Level.ERROR);
}
@Test
/** Tests streamEvents with a large scn with concurrent writes */
public void testStreamLargeScn() throws Exception
{
final Logger log = Logger.getLogger("TestDbusEventBuffer.testStreamLargeScn");
//log.setLevel(Level.INFO);
log.info("starting");
final DbusEventBuffer dbusBuf =
new DbusEventBuffer(TestDbusEventBuffer.getConfig(
120000, 500000, 1024, 500, AllocationPolicy.HEAP_MEMORY, QueuePolicy.OVERWRITE_ON_WRITE,
AssertLevel.ALL));
final Checkpoint cp = Checkpoint.createOnlineConsumptionCheckpoint(1000);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
final WritableByteChannel ochannel = Channels.newChannel(baos);
final AtomicBoolean hasError = new AtomicBoolean(false);
final AtomicInteger num = new AtomicInteger(0);
final AtomicBoolean genComplete = new AtomicBoolean(false);
UncaughtExceptionTrackingThread streamThread = new UncaughtExceptionTrackingThread(new Runnable()
{
@Override
public void run()
{
try
{
while (!genComplete.get() && 0 >= num.get())
{
StreamEventsArgs args = new StreamEventsArgs(10000);
num.set(dbusBuf.streamEvents(cp, ochannel, args).getNumEventsStreamed());
}
}
catch (ScnNotFoundException e)
{
hasError.set(true);
}
catch (OffsetNotFoundException e)
{
hasError.set(true);
}
}
}, "testGetLargeScn.streamThread");
streamThread.setDaemon(true);
streamThread.start();
log.info("append initial events");
DbusEventGenerator generator = new DbusEventGenerator();
Vector<DbusEvent> events = new Vector<DbusEvent>();
generator.generateEvents(70000, 1, 120, 39, events);
// Add events to the EventBuffer. Now the buffer is full
DbusEventAppender appender = new DbusEventAppender(events, dbusBuf, null);
appender.run(); // running in the same thread
genComplete.set(true);
streamThread.join(10000);
Assert.assertFalse(streamThread.isAlive());
Assert.assertNull(streamThread.getLastException());
Assert.assertFalse(hasError.get());
Assert.assertTrue(num.get() > 0);
}
}