/**
 * 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.hadoop.mapreduce.security;

import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_SECURITY_AUTHENTICATION;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyLong;
import static org.mockito.Matchers.anyObject;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.doReturn;

import java.net.InetSocketAddress;
import java.security.PrivilegedExceptionAction;

import org.apache.commons.logging.*;
import org.apache.commons.logging.impl.Log4JLogger;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;

import org.apache.hadoop.ipc.Client;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
import org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier;
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.SaslInputStream;
import org.apache.hadoop.security.SaslRpcClient;
import org.apache.hadoop.security.SaslRpcServer;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;

import org.apache.log4j.Level;
import org.junit.Test;

/** Unit tests for using Job Token over RPC. 
 * 
 * System properties required:
 * -Djava.security.krb5.conf=.../hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/target/test-classes/krb5.conf 
 * -Djava.net.preferIPv4Stack=true
 */
public class TestUmbilicalProtocolWithJobToken {
  private static final String ADDRESS = "0.0.0.0";

  public static final Log LOG = LogFactory
      .getLog(TestUmbilicalProtocolWithJobToken.class);

  private static Configuration conf;
  static {
    conf = new Configuration();
    conf.set(HADOOP_SECURITY_AUTHENTICATION, "kerberos");
    UserGroupInformation.setConfiguration(conf);
  }

  static {
    ((Log4JLogger) Client.LOG).getLogger().setLevel(Level.ALL);
    ((Log4JLogger) Server.LOG).getLogger().setLevel(Level.ALL);
    ((Log4JLogger) SaslRpcClient.LOG).getLogger().setLevel(Level.ALL);
    ((Log4JLogger) SaslRpcServer.LOG).getLogger().setLevel(Level.ALL);
    ((Log4JLogger) SaslInputStream.LOG).getLogger().setLevel(Level.ALL);
  }

  @Test
  public void testJobTokenRpc() throws Exception {
    TaskUmbilicalProtocol mockTT = mock(TaskUmbilicalProtocol.class);
    doReturn(TaskUmbilicalProtocol.versionID)
      .when(mockTT).getProtocolVersion(anyString(), anyLong());
    doReturn(ProtocolSignature.getProtocolSignature(
        mockTT, TaskUmbilicalProtocol.class.getName(),
        TaskUmbilicalProtocol.versionID, 0))
      .when(mockTT).getProtocolSignature(anyString(), anyLong(), anyInt());

    JobTokenSecretManager sm = new JobTokenSecretManager();
    final Server server = new RPC.Builder(conf)
        .setProtocol(TaskUmbilicalProtocol.class).setInstance(mockTT)
        .setBindAddress(ADDRESS).setPort(0).setNumHandlers(5).setVerbose(true)
        .setSecretManager(sm).build();

    server.start();

    final UserGroupInformation current = UserGroupInformation.getCurrentUser();
    final InetSocketAddress addr = NetUtils.getConnectAddress(server);
    String jobId = current.getUserName();
    JobTokenIdentifier tokenId = new JobTokenIdentifier(new Text(jobId));
    Token<JobTokenIdentifier> token = new Token<JobTokenIdentifier>(tokenId, sm);
    sm.addTokenForJob(jobId, token);
    SecurityUtil.setTokenService(token, addr);
    LOG.info("Service address for token is " + token.getService());
    current.addToken(token);
    current.doAs(new PrivilegedExceptionAction<Object>() {
      @Override
      public Object run() throws Exception {
        TaskUmbilicalProtocol proxy = null;
        try {
          proxy = (TaskUmbilicalProtocol) RPC.getProxy(
              TaskUmbilicalProtocol.class, TaskUmbilicalProtocol.versionID,
              addr, conf);
          proxy.statusUpdate(null, null);
        } finally {
          server.stop();
          if (proxy != null) {
            RPC.stopProxy(proxy);
          }
        }
        return null;
      }
    });
  }

}