/**
* Copyright (c) 2010 Yahoo! Inc. All rights reserved.
* Licensed 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. See accompanying LICENSE file.
*/
package org.apache.oozie.action.hadoop;
import java.io.IOException;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.oozie.service.HadoopAccessorService;
import org.apache.oozie.service.Services;
//TODO this class can go away once we use only 20.100+
public class AuthHelper {
private static Class<? extends AuthHelper> KLASS = null;
@SuppressWarnings("unchecked")
public synchronized static AuthHelper get() {
if (KLASS == null) {
HadoopAccessorService has = Services.get().get(HadoopAccessorService.class);
if (has.getClass() == HadoopAccessorService.class) {
KLASS = AuthHelper.class;
}
else {
try {
KLASS = (Class<? extends AuthHelper>) Class
.forName("org.apache.oozie.action.hadoop.KerberosAuthHelper");
}
catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
}
}
return ReflectionUtils.newInstance(KLASS, null);
}
public void set(JobClient jobClient, JobConf jobConf) throws IOException, InterruptedException {
}
}