/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Apr 16, 2009
*/
package com.bigdata.service.ndx.pipeline;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
import com.bigdata.btree.keys.KVO;
import com.bigdata.relation.accesspath.BlockingBuffer;
import com.bigdata.util.InnerCause;
/**
* Unit tests for error handling in the control logic used by
* {@link AbstractMasterTask} and friends.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestMasterTaskWithErrors extends AbstractMasterTestCase {
public TestMasterTaskWithErrors() {
}
public TestMasterTaskWithErrors(String name) {
super(name);
}
/**
* Unit test verifies correct shutdown and error reporting when a subtask
* fails.
*
* @throws InterruptedException
* @throws ExecutionException
*/
public void test_startWriteErrorStop() throws InterruptedException,
ExecutionException {
final H masterStats = new H();
final BlockingBuffer<KVO<O>[]> masterBuffer = new BlockingBuffer<KVO<O>[]>(
masterQueueCapacity);
/*
* Note: The master is overridden so that the 1st chunk written onto
* locator(13) will cause an exception to be thrown.
*/
final M master = new M(masterStats, masterBuffer, executorService) {
@Override
protected S newSubtask(L locator, BlockingBuffer<KVO<O>[]> out) {
if (locator.locator == 13) {
return new S(this, locator, out) {
@Override
protected boolean handleChunk(KVO<O>[] chunk)
throws Exception {
throw new TestException();
}
};
}
return super.newSubtask(locator, out);
}
};
// Wrap computation as FutureTask.
final FutureTask<H> ft = new FutureTask<H>(master);
// Set Future on BlockingBuffer.
masterBuffer.setFuture(ft);
// Start the consumer.
executorService.submit(ft);
final KVO<O>[] a = new KVO[] {
new KVO<O>(new byte[]{1},new byte[]{2},null/*val*/),
new KVO<O>(new byte[]{13},new byte[]{3},null/*val*/)
};
masterBuffer.add(a);
masterBuffer.close();
try {
// Note: We expect an exception.
masterBuffer.getFuture().get();
fail("Not expecting master to succeed.");
} catch (ExecutionException ex) {
final TestException t = (TestException) InnerCause.getInnerCause(
ex, TestException.class);
if (t == null) {
// not the exception we were expecting.
throw ex;
}
if (log.isInfoEnabled())
log.info("Ignoring expected exception: " + t);
}
assertEquals("elementsIn", a.length, masterStats.elementsIn.get());
assertEquals("chunksIn", 1, masterStats.chunksIn.get());
assertEquals("partitionCount", 2, masterStats
.getMaximumPartitionCount());
/*
* Note: There is no way to predict whether any chunks will have been
* written on L(1) since it is drained by its own Thread.
*/
}
}