azkaban.utils.AuthenticationUtils.java Source code

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Here is the source code for azkaban.utils.AuthenticationUtils.java

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/*
* Copyright 2018 LinkedIn Corp.
*
* Licensed 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 azkaban.utils;

import java.net.HttpURLConnection;
import java.net.URL;
import java.security.PrivilegedExceptionAction;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.client.AuthenticatedURL;
import org.apache.hadoop.security.authentication.client.AuthenticatedURL.Token;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The util class for hadoop authentication.
 */
public class AuthenticationUtils {

    private static final Logger logger = LoggerFactory.getLogger(AuthenticationUtils.class);

    public static HttpURLConnection loginAuthenticatedURL(final URL url, final String keytabPrincipal,
            final String keytabPath) throws Exception {

        logger.info("Logging in URL: " + url.toString() + " using Principal: " + keytabPrincipal + ", Keytab: "
                + keytabPath);

        UserGroupInformation loginUser = UserGroupInformation.getLoginUser();

        if (loginUser == null) {
            UserGroupInformation.loginUserFromKeytab(keytabPrincipal, keytabPath);
            loginUser = UserGroupInformation.getLoginUser();
            logger.info("Logged in with user " + loginUser);
        } else {
            logger.info("Login user (" + loginUser + ") already created, refreshing tgt.");
            loginUser.checkTGTAndReloginFromKeytab();
        }

        final HttpURLConnection connection = loginUser.doAs((PrivilegedExceptionAction<HttpURLConnection>) () -> {
            final Token token = new Token();
            return new AuthenticatedURL().openConnection(url, token);
        });

        return connection;
    }
}