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/**
* 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.hive.service.cli.session;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.shims.Utils;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hive.service.auth.HiveAuthFactory;
import org.apache.hive.service.cli.HiveSQLException;
import org.apache.hive.service.cli.thrift.TProtocolVersion;
/**
*
* HiveSessionImplwithUGI.
* HiveSession with connecting user's UGI and delegation token if required
*/
public class HiveSessionImplwithUGI extends HiveSessionImpl {
public static final String HS2TOKEN = "HiveServer2ImpersonationToken";
private UserGroupInformation sessionUgi = null;
private String delegationTokenStr = null;
private Hive sessionHive = null;
private HiveSession proxySession = null;
static final Log LOG = LogFactory.getLog(HiveSessionImplwithUGI.class);
public HiveSessionImplwithUGI(TProtocolVersion protocol, String username, String password,
HiveConf hiveConf, String ipAddress, String delegationToken) throws HiveSQLException {
super(protocol, username, password, hiveConf, ipAddress);
setSessionUGI(username);
setDelegationToken(delegationToken);
// create a new metastore connection for this particular user session
Hive.set(null);
try {
sessionHive = Hive.get(getHiveConf());
} catch (HiveException e) {
throw new HiveSQLException("Failed to setup metastore connection", e);
}
}
// setup appropriate UGI for the session
public void setSessionUGI(String owner) throws HiveSQLException {
if (owner == null) {
throw new HiveSQLException("No username provided for impersonation");
}
if (UserGroupInformation.isSecurityEnabled()) {
try {
sessionUgi = UserGroupInformation.createProxyUser(
owner, UserGroupInformation.getLoginUser());
} catch (IOException e) {
throw new HiveSQLException("Couldn't setup proxy user", e);
}
} else {
sessionUgi = UserGroupInformation.createRemoteUser(owner);
}
}
public UserGroupInformation getSessionUgi() {
return this.sessionUgi;
}
public String getDelegationToken() {
return this.delegationTokenStr;
}
@Override
protected synchronized void acquire(boolean userAccess) {
super.acquire(userAccess);
// if we have a metastore connection with impersonation, then set it first
if (sessionHive != null) {
Hive.set(sessionHive);
}
}
/**
* Close the file systems for the session and remove it from the FileSystem cache.
* Cancel the session's delegation token and close the metastore connection
*/
@Override
public void close() throws HiveSQLException {
try {
acquire(true);
cancelDelegationToken();
} finally {
try {
super.close();
} finally {
try {
FileSystem.closeAllForUGI(sessionUgi);
} catch (IOException ioe) {
throw new HiveSQLException("Could not clean up file-system handles for UGI: "
+ sessionUgi, ioe);
}
}
}
}
/**
* Enable delegation token for the session
* save the token string and set the token.signature in hive conf. The metastore client uses
* this token.signature to determine where to use kerberos or delegation token
* @throws HiveException
* @throws IOException
*/
private void setDelegationToken(String delegationTokenStr) throws HiveSQLException {
this.delegationTokenStr = delegationTokenStr;
if (delegationTokenStr != null) {
getHiveConf().set("hive.metastore.token.signature", HS2TOKEN);
try {
Utils.setTokenStr(sessionUgi, delegationTokenStr, HS2TOKEN);
} catch (IOException e) {
throw new HiveSQLException("Couldn't setup delegation token in the ugi", e);
}
}
}
// If the session has a delegation token obtained from the metastore, then cancel it
private void cancelDelegationToken() throws HiveSQLException {
if (delegationTokenStr != null) {
try {
Hive.get(getHiveConf()).cancelDelegationToken(delegationTokenStr);
} catch (HiveException e) {
throw new HiveSQLException("Couldn't cancel delegation token", e);
}
// close the metastore connection created with this delegation token
Hive.closeCurrent();
}
}
@Override
protected HiveSession getSession() {
assert proxySession != null;
return proxySession;
}
public void setProxySession(HiveSession proxySession) {
this.proxySession = proxySession;
}
@Override
public String getDelegationToken(HiveAuthFactory authFactory, String owner,
String renewer) throws HiveSQLException {
return authFactory.getDelegationToken(owner, renewer);
}
@Override
public void cancelDelegationToken(HiveAuthFactory authFactory, String tokenStr)
throws HiveSQLException {
authFactory.cancelDelegationToken(tokenStr);
}
@Override
public void renewDelegationToken(HiveAuthFactory authFactory, String tokenStr)
throws HiveSQLException {
authFactory.renewDelegationToken(tokenStr);
}
}
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