com.pigai.hadoop.HttpPseudoAuthenticator.java Source code

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Here is the source code for com.pigai.hadoop.HttpPseudoAuthenticator.java

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/**
 * 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 com.pigai.hadoop;

import java.io.IOException;

import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.client.PseudoAuthenticator;

/**
 * A <code>PseudoAuthenticator</code> subclass that uses FileSystemAccess's
 * <code>UserGroupInformation</code> to obtain the client user name (the UGI's login user).
 */
public class HttpPseudoAuthenticator extends PseudoAuthenticator {

    /**
     * Return the client user name.
     *
     * @return the client user name.
     */
    @Override
    protected String getUserName() {
        try {
            return UserGroupInformation.getLoginUser().getUserName();
        } catch (IOException ex) {
            throw new SecurityException("Could not obtain current user, " + ex.getMessage(), ex);
        }
    }
}