/*
* 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.accumulo.core.rpc;
import static java.util.Objects.requireNonNull;
import java.security.PrivilegedAction;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportFactory;
/**
* A TransportFactory that wraps another one, but assumes a specified UGI before calling through.
*
* This is used on the server side to assume the server's Principal when accepting clients.
*
* Borrowed from Apache Hive 0.14
*/
public class UGIAssumingTransportFactory extends TTransportFactory {
private final UserGroupInformation ugi;
private final TTransportFactory wrapped;
public UGIAssumingTransportFactory(TTransportFactory wrapped, UserGroupInformation ugi) {
requireNonNull(wrapped);
requireNonNull(ugi);
this.wrapped = wrapped;
this.ugi = ugi;
}
@Override
public TTransport getTransport(final TTransport trans) {
return ugi.doAs(new PrivilegedAction<TTransport>() {
@Override
public TTransport run() {
return wrapped.getTransport(trans);
}
});
}
}