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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.security;
import java.security.AccessControlContext;
import java.security.AccessController;
import javax.security.auth.Subject;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Operates by retrieving the currently set subject in a way that ES-Hadoop understands, or
* a blank subject if there isn't currently one available.
*/
public class JdkUserProvider extends UserProvider {
private static final Log LOG = LogFactory.getLog(JdkUserProvider.class);
@Override
public User getUser() {
AccessControlContext acc = AccessController.getContext();
Subject subject = Subject.getSubject(acc);
if (subject == null) {
if (LOG.isTraceEnabled()) {
LOG.trace("Could not locate existing Subject - Creating new one");
}
subject = new Subject();
} else {
if (LOG.isTraceEnabled()) {
LOG.trace("Located existing Subject - " + subject);
}
}
return new JdkUser(subject, getSettings());
}
}