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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.repositories.hdfs;
import org.apache.hadoop.fs.FileSystem;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.SpecialPermission;
import org.elasticsearch.plugin.hadoop.hdfs.Utils;
import java.io.IOException;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
class SecurityUtils {
abstract static class AccBridge extends Utils {
static AccessControlContext acc() {
return Utils.hadoopACC();
}
}
static <V> V execute(FileSystemFactory ffs, FsCallback<V> callback) throws IOException {
return execute(ffs.getFileSystem(), callback);
}
static <V> V execute(FileSystem fs, FsCallback<V> callback) throws IOException {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
// unprivileged code such as scripts do not have SpecialPermission
sm.checkPermission(new SpecialPermission());
}
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction<V>() {
@Override
public V run() throws IOException {
return callback.doInHdfs(fs);
}
}, AccBridge.acc());
} catch (PrivilegedActionException pae) {
Throwable th = pae.getCause();
if (th instanceof Error) {
throw (Error) th;
}
if (th instanceof RuntimeException) {
throw (RuntimeException) th;
}
if (th instanceof IOException) {
throw (IOException) th;
}
throw new ElasticsearchException(pae);
}
}
}
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