org.apache.hadoop.hive.metastore.security.DBTokenStore.java Source code

Introduction

Here is the source code for org.apache.hadoop.hive.metastore.security.DBTokenStore.java

Source

/*
 * 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.hive.metastore.security;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge.Server.ServerMode;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager.DelegationTokenInformation;
import org.apache.hadoop.security.token.delegation.MetastoreDelegationTokenSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DBTokenStore implements DelegationTokenStore {
    private static final Logger LOG = LoggerFactory.getLogger(DBTokenStore.class);
    private Configuration conf;

    @Override
    public int addMasterKey(String s) throws TokenStoreException {
        LOG.trace("addMasterKey: s = {}", s);
        return (Integer) invokeOnTokenStore("addMasterKey", new Object[] { s }, String.class);
    }

    @Override
    public void updateMasterKey(int keySeq, String s) throws TokenStoreException {
        LOG.trace("updateMasterKey: s = {}, keySeq = {}", s, keySeq);
        invokeOnTokenStore("updateMasterKey", new Object[] { Integer.valueOf(keySeq), s }, Integer.class,
                String.class);
    }

    @Override
    public boolean removeMasterKey(int keySeq) {
        return (Boolean) invokeOnTokenStore("removeMasterKey", new Object[] { Integer.valueOf(keySeq) },
                Integer.class);
    }

    @Override
    public String[] getMasterKeys() throws TokenStoreException {
        return (String[]) invokeOnTokenStore("getMasterKeys", new Object[0]);
    }

    @Override
    public boolean addToken(DelegationTokenIdentifier tokenIdentifier, DelegationTokenInformation token)
            throws TokenStoreException {

        try {
            String identifier = TokenStoreDelegationTokenSecretManager.encodeWritable(tokenIdentifier);
            String tokenStr = Base64.encodeBase64URLSafeString(
                    MetastoreDelegationTokenSupport.encodeDelegationTokenInformation(token));
            boolean result = (Boolean) invokeOnTokenStore("addToken", new Object[] { identifier, tokenStr },
                    String.class, String.class);
            LOG.trace("addToken: tokenIdentifier = {}, added = {}", tokenIdentifier, result);
            return result;
        } catch (IOException e) {
            throw new TokenStoreException(e);
        }
    }

    @Override
    public DelegationTokenInformation getToken(DelegationTokenIdentifier tokenIdentifier)
            throws TokenStoreException {
        try {
            String tokenStr = (String) invokeOnTokenStore("getToken",
                    new Object[] { TokenStoreDelegationTokenSecretManager.encodeWritable(tokenIdentifier) },
                    String.class);
            DelegationTokenInformation result = null;
            if (StringUtils.isNotEmpty(tokenStr)) {
                result = MetastoreDelegationTokenSupport
                        .decodeDelegationTokenInformation(Base64.decodeBase64(tokenStr));
            }
            LOG.trace("getToken: tokenIdentifier = {}, result = {}", tokenIdentifier, result);
            return result;
        } catch (IOException e) {
            throw new TokenStoreException(e);
        }
    }

    @Override
    public boolean removeToken(DelegationTokenIdentifier tokenIdentifier) throws TokenStoreException {
        try {
            boolean result = (Boolean) invokeOnTokenStore("removeToken",
                    new Object[] { TokenStoreDelegationTokenSecretManager.encodeWritable(tokenIdentifier) },
                    String.class);
            LOG.trace("removeToken: tokenIdentifier = {}, removed = {}", tokenIdentifier, result);
            return result;
        } catch (IOException e) {
            throw new TokenStoreException(e);
        }
    }

    @Override
    public List<DelegationTokenIdentifier> getAllDelegationTokenIdentifiers() throws TokenStoreException {

        List<String> tokenIdents = (List<String>) invokeOnTokenStore("getAllTokenIdentifiers", new Object[0]);
        List<DelegationTokenIdentifier> delTokenIdents = new ArrayList<DelegationTokenIdentifier>(
                tokenIdents.size());

        for (String tokenIdent : tokenIdents) {
            DelegationTokenIdentifier delToken = new DelegationTokenIdentifier();
            try {
                TokenStoreDelegationTokenSecretManager.decodeWritable(delToken, tokenIdent);
            } catch (IOException e) {
                throw new TokenStoreException(e);
            }
            delTokenIdents.add(delToken);
        }
        return delTokenIdents;
    }

    private Object handler;
    private ServerMode serverMode;

    @Override
    public void init(Object handler, HadoopThriftAuthBridge.Server.ServerMode serverMode)
            throws TokenStoreException {
        this.handler = handler;
        this.serverMode = serverMode;
    }

    private Object invokeOnTokenStore(String methName, Object[] params, Class<?>... paramTypes)
            throws TokenStoreException {
        Object tokenStore;
        try {
            switch (serverMode) {
            case METASTORE:
                tokenStore = handler.getClass().getMethod("getMS").invoke(handler);
                break;
            case HIVESERVER2:
                Object hiveObject = ((Class<?>) handler).getMethod("get").invoke(handler, null);
                tokenStore = ((Class<?>) handler).getMethod("getMSC").invoke(hiveObject);
                break;
            default:
                throw new IllegalArgumentException("Unexpected value of Server mode " + serverMode);
            }
            return tokenStore.getClass().getMethod(methName, paramTypes).invoke(tokenStore, params);
        } catch (IllegalArgumentException e) {
            throw new TokenStoreException(e);
        } catch (SecurityException e) {
            throw new TokenStoreException(e);
        } catch (IllegalAccessException e) {
            throw new TokenStoreException(e);
        } catch (InvocationTargetException e) {
            throw new TokenStoreException(e.getCause());
        } catch (NoSuchMethodException e) {
            throw new TokenStoreException(e);
        }
    }

    @Override
    public void setConf(Configuration conf) {
        this.conf = conf;
    }

    @Override
    public Configuration getConf() {
        return conf;
    }

    @Override
    public void close() throws IOException {
        // No-op.
    }

}