/**
* 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.tools;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.tools.DelegationTokenFetcher;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.junit.Before;
import org.junit.Test;
public class TestDelegationTokenFetcher {
private DistributedFileSystem dfs;
private DataOutputStream out;
private UserGroupInformation ugi;
private Configuration conf;
@Before
public void init() {
dfs = mock(DistributedFileSystem.class);
out = mock(DataOutputStream.class);
ugi = mock(UserGroupInformation.class);
conf = new Configuration();
}
/**
* Verify that when the DelegationTokenFetcher runs, it talks to the Namenode,
* pulls out the correct user's token and successfully serializes it to disk.
*/
@Test
public void expectedTokenIsRetrievedFromDFS() throws Exception {
final String LONG_NAME = "TheDoctor@TARDIS";
final String SHORT_NAME = "TheDoctor";
final String SERVICE_VALUE = "localhost:2005";
URI uri = new URI("hdfs://" + SERVICE_VALUE);
FileSystem.setDefaultUri(conf, uri);
// Mock out the user's long and short names.
when(ugi.getUserName()).thenReturn(LONG_NAME);
when(ugi.getShortUserName()).thenReturn(SHORT_NAME);
// Create a token for the fetcher to fetch, wire NN to return it when asked
// for this particular user.
Token<DelegationTokenIdentifier> t = new Token<DelegationTokenIdentifier>();
when(dfs.getDelegationToken(eq(new Text(LONG_NAME)))).thenReturn(t);
// Now, actually let the TokenFetcher go fetch the token.
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
out = new DataOutputStream(baos);
new DelegationTokenFetcher(dfs, out, ugi, conf).go();
// now read the data back in and verify correct values
Credentials ts = new Credentials();
DataInputStream dis =
new DataInputStream(new ByteArrayInputStream(baos.toByteArray()));
ts.readTokenStorageStream(dis);
Token<? extends TokenIdentifier> newToken = ts.getToken(new Text(SHORT_NAME));
assertEquals("Should only be one token in storage", ts.numberOfTokens(), 1);
assertEquals("Service value should have survived",
"127.0.0.1:2005", newToken.getService().toString());
}
private void checkWithNullParam(String s) {
try {
new DelegationTokenFetcher(dfs, out, ugi, conf);
} catch (IllegalArgumentException iae) {
assertEquals("Expected exception message not received",
s + " cannot be null.", iae.getMessage());
return; // received expected exception. We're good.
}
fail("null parameter should have failed.");
}
@Test
public void dfsCannotBeNull() {
dfs = null;
String s = "dfs";
checkWithNullParam(s);
}
@Test
public void dosCannotBeNull() {
out = null;
String s = "out";
checkWithNullParam(s);
}
@Test
public void ugiCannotBeNull() {
ugi = null;
String s = "ugi";
checkWithNullParam(s);
}
}