org.apache.flink.runtime.security.HadoopSecurityContext Maven / Gradle / Ivy
/*
* 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.flink.runtime.security;
import org.apache.flink.util.Preconditions;
import org.apache.hadoop.security.UserGroupInformation;
import java.security.PrivilegedExceptionAction;
import java.util.concurrent.Callable;
/*
* Hadoop security context which runs a Callable with the previously
* initialized UGI and appropriate security credentials.
*/
class HadoopSecurityContext implements SecurityContext {
private final UserGroupInformation ugi;
HadoopSecurityContext(UserGroupInformation ugi) {
this.ugi = Preconditions.checkNotNull(ugi, "UGI passed cannot be null");
}
public T runSecured(final Callable securedCallable) throws Exception {
return ugi.doAs((PrivilegedExceptionAction) securedCallable::call);
}
}