/**
* 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;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.anyBoolean;
import static org.mockito.Matchers.anyLong;
import static org.mockito.Matchers.anyObject;
import static org.mockito.Matchers.anyShort;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.ipc.RemoteException;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* This tests verifies that new DFSClients handle exceptions that would be
* thrown by older NameNodes (pre cdh3u3, pre apache 0.21).
*
* This is a CDH3 specific backwards compatibility test.
*/
public class TestDfsClientCreateParentCompatibility {
public static final Log LOG = LogFactory
.getLog(TestDfsClientCreateParentCompatibility.class);
@Test
public void testCreateWithoutDirsCompatibility() throws IOException {
Configuration conf = new Configuration();
NameNode nn = mock(NameNode.class);
final String err =
"java.io.IOException: " +
"java.lang.NoSuchMethodException: org.apache.hadoop.hdfs." +
"protocol.ClientProtocol.create(java.lang.String, " +
"org.apache.hadoop.fs.permission.FsPermission, " +
"java.lang.String, boolean, boolean, short, long)";
final AtomicInteger newCount = new AtomicInteger();
Answer<Void> newCallCounter = new Answer<Void>() {
@Override
public Void answer(InvocationOnMock invocation) throws Throwable {
LOG.info("New Call "+ Arrays.toString(invocation.getArguments()));
newCount.incrementAndGet();
throw new RemoteException(IOException.class.getName(), err);
}
};
final AtomicInteger oldCount = new AtomicInteger();
Answer<Void> oldCallCounter = new Answer<Void>() {
@Override
public Void answer(InvocationOnMock invocation) throws Throwable {
LOG.info("Old Call "+ Arrays.toString(invocation.getArguments()));
oldCount.incrementAndGet();
return null;
}
};
// new api client call
doAnswer(newCallCounter).when(nn)
.create((String)anyObject(), (FsPermission)anyObject(),
(String)anyObject(), anyBoolean(), eq(false), anyShort(), anyLong());
// old api client call
doAnswer(oldCallCounter).when(nn)
.create((String)anyObject(), (FsPermission)anyObject(),
(String)anyObject(), anyBoolean(), anyShort(), anyLong());
DFSClient client = new DFSClient(null, nn, conf, null);
boolean createParent = false;
client.create("foo", null, false, createParent, (short) 1, 512, null, 512);
client.create("bar", null, false, createParent, (short) 1, 512, null, 512);
client.create("baz", null, false, createParent, (short) 1, 512, null, 512);
// no exception was thrown, three calls to the old verison.
assertEquals(3, oldCount.get());
assertEquals(1, newCount.get());
}
@Test(expected=IOException.class)
public void testCreateWithException() throws IOException {
Configuration conf = new Configuration();
NameNode nn = mock(NameNode.class);
// new api client call
Exception e = new RemoteException(IOException.class.getName(),
"Other remote exception");
doThrow(e).when(nn)
.create((String)anyObject(), (FsPermission)anyObject(),
(String)anyObject(), anyBoolean(), eq(false), anyShort(), anyLong());
DFSClient client = new DFSClient(null, nn, conf, null);
boolean createParent = false;
client.create("foo", null, false, createParent, (short) 1, 512, null, 512);
fail("Expected an IOException");
}
/**
* Small testing program that attemps to call createNonRecursive.
*/
public static void main(String argv[]) throws IOException {
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(conf);
Path p = new Path(argv[0]);
FSDataOutputStream out = fs.createNonRecursive(p, true, 512, (short) 1,
512, null);
out.close();
fs.close();
}
}