org.apache.hadoop.mapreduce.v2.security.MRDelegationTokenRenewer.java Source code

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Here is the source code for org.apache.hadoop.mapreduce.v2.security.MRDelegationTokenRenewer.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 org.apache.hadoop.mapreduce.v2.security;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.security.PrivilegedAction;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.mapreduce.v2.api.HSClientProtocol;
import org.apache.hadoop.mapreduce.v2.api.MRClientProtocol;
import org.apache.hadoop.mapreduce.v2.api.MRDelegationTokenIdentifier;
import org.apache.hadoop.mapreduce.v2.api.protocolrecords.CancelDelegationTokenRequest;
import org.apache.hadoop.mapreduce.v2.api.protocolrecords.RenewDelegationTokenRequest;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenRenewer;
import org.apache.hadoop.yarn.ipc.YarnRPC;
import org.apache.hadoop.yarn.util.Records;

@InterfaceAudience.Private
public class MRDelegationTokenRenewer extends TokenRenewer {

    private static final Log LOG = LogFactory.getLog(MRDelegationTokenRenewer.class);

    @Override
    public boolean handleKind(Text kind) {
        return MRDelegationTokenIdentifier.KIND_NAME.equals(kind);
    }

    @Override
    public long renew(Token<?> token, Configuration conf) throws IOException, InterruptedException {

        org.apache.hadoop.yarn.api.records.Token dToken = org.apache.hadoop.yarn.api.records.Token.newInstance(
                token.getIdentifier(), token.getKind().toString(), token.getPassword(),
                token.getService().toString());

        MRClientProtocol histProxy = instantiateHistoryProxy(conf, SecurityUtil.getTokenServiceAddr(token));
        try {
            RenewDelegationTokenRequest request = Records.newRecord(RenewDelegationTokenRequest.class);
            request.setDelegationToken(dToken);
            return histProxy.renewDelegationToken(request).getNextExpirationTime();
        } finally {
            stopHistoryProxy(histProxy);
        }

    }

    @Override
    public void cancel(Token<?> token, Configuration conf) throws IOException, InterruptedException {

        org.apache.hadoop.yarn.api.records.Token dToken = org.apache.hadoop.yarn.api.records.Token.newInstance(
                token.getIdentifier(), token.getKind().toString(), token.getPassword(),
                token.getService().toString());

        MRClientProtocol histProxy = instantiateHistoryProxy(conf, SecurityUtil.getTokenServiceAddr(token));
        try {
            CancelDelegationTokenRequest request = Records.newRecord(CancelDelegationTokenRequest.class);
            request.setDelegationToken(dToken);
            histProxy.cancelDelegationToken(request);
        } finally {
            stopHistoryProxy(histProxy);
        }
    }

    @Override
    public boolean isManaged(Token<?> token) throws IOException {
        return true;
    }

    protected void stopHistoryProxy(MRClientProtocol proxy) {
        RPC.stopProxy(proxy);
    }

    protected MRClientProtocol instantiateHistoryProxy(final Configuration conf, final InetSocketAddress hsAddress)
            throws IOException {

        if (LOG.isDebugEnabled()) {
            LOG.debug("Connecting to MRHistoryServer at: " + hsAddress);
        }
        final YarnRPC rpc = YarnRPC.create(conf);
        UserGroupInformation currentUser = UserGroupInformation.getCurrentUser();
        return currentUser.doAs(new PrivilegedAction<MRClientProtocol>() {
            @Override
            public MRClientProtocol run() {
                return (MRClientProtocol) rpc.getProxy(HSClientProtocol.class, hsAddress, conf);
            }
        });
    }
}