/**
* 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
* 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 org.apache.hadoop.hdfs.client;
import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.io.nativeio.SharedFileDescriptorFactory;
import org.apache.hadoop.hdfs.ExtendedBlockId;
import org.apache.hadoop.hdfs.ShortCircuitShm;
import org.apache.hadoop.hdfs.ShortCircuitShm.ShmId;
import org.apache.hadoop.hdfs.ShortCircuitShm.Slot;
import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;
import org.junit.Assert;
public class TestShortCircuitShm {
public static final Log LOG = LogFactory.getLog(TestShortCircuitShm.class);
private static final File TEST_BASE =
new File(System.getProperty("test.build.data", "/tmp"));
@Before
public void before() {
Assume.assumeTrue(null ==
SharedFileDescriptorFactory.getLoadingFailureReason());
}
@Test(timeout=60000)
public void testStartupShutdown() throws Exception {
File path = new File(TEST_BASE, "testStartupShutdown");
path.mkdirs();
SharedFileDescriptorFactory factory =
SharedFileDescriptorFactory.create("shm_",
new String[] { path.getAbsolutePath() } );
FileInputStream stream =
factory.createDescriptor("testStartupShutdown", 4096);
ShortCircuitShm shm = new ShortCircuitShm(ShmId.createRandom(), stream);
shm.free();
stream.close();
FileUtil.fullyDelete(path);
}
@Test(timeout=60000)
public void testAllocateSlots() throws Exception {
File path = new File(TEST_BASE, "testAllocateSlots");
path.mkdirs();
SharedFileDescriptorFactory factory =
SharedFileDescriptorFactory.create("shm_",
new String[] { path.getAbsolutePath() });
FileInputStream stream =
factory.createDescriptor("testAllocateSlots", 4096);
ShortCircuitShm shm = new ShortCircuitShm(ShmId.createRandom(), stream);
int numSlots = 0;
ArrayList<Slot> slots = new ArrayList<Slot>();
while (!shm.isFull()) {
Slot slot = shm.allocAndRegisterSlot(new ExtendedBlockId(123L, "test_bp1"));
slots.add(slot);
numSlots++;
}
LOG.info("allocated " + numSlots + " slots before running out.");
int slotIdx = 0;
for (Iterator<Slot> iter = shm.slotIterator();
iter.hasNext(); ) {
Assert.assertTrue(slots.contains(iter.next()));
}
for (Slot slot : slots) {
Assert.assertFalse(slot.addAnchor());
Assert.assertEquals(slotIdx++, slot.getSlotIdx());
}
for (Slot slot : slots) {
slot.makeAnchorable();
}
for (Slot slot : slots) {
Assert.assertTrue(slot.addAnchor());
}
for (Slot slot : slots) {
slot.removeAnchor();
}
for (Slot slot : slots) {
shm.unregisterSlot(slot.getSlotIdx());
slot.makeInvalid();
}
shm.free();
stream.close();
FileUtil.fullyDelete(path);
}
}