com.chinamobile.bcbsp.io.db.TableOutputFormat.java Source code

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Here is the source code for com.chinamobile.bcbsp.io.db.TableOutputFormat.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.chinamobile.bcbsp.io.db;

//import com.chinamobile.bcbsp.thirdPartyInterface.Hbase.BSPTable;
//import com.chinamobile.bcbsp.thirdPartyInterface.Hbase.impl.BSPHBZKUtilImpl;
//import com.chinamobile.bcbsp.thirdPartyInterface.Hbase.impl.BSPHBaseConfImpl;
//import com.chinamobile.bcbsp.thirdPartyInterface.Hbase.impl.BSPTableImpl;

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;

/**
 * A OutputFormat that sends the reduce output to a HBash table.
 *
 * @param <KEY> A type of sign
 */
public class TableOutputFormat<KEY> extends TableOutputFormatBase<KEY> {
    /** Job parameter that specifies the output table. */
    public static final String OUTPUT_TABLE = "hbase.outputtable";
    /**
     * Optional job parameter to specify a peer cluster. Used specifying remote
     * cluster when copying between hbase clusters (the source is picked up from
     * <code>hbase-site.xml</code>).
     */
    public static final String QUORUM_ADDRESS = "hbase.mapred.output.quorum";
    /** Optional specification of the rs class name of the peer cluster */
    public static final String REGION_SERVER_CLASS = "hbase.mapred.output.rs.class";
    /** Optional specification of the rs impl name of the peer cluster */
    public static final String REGION_SERVER_IMPL = "hbase.mapred.output.rs.impl";
    /** Define LOG for outputting log information */
    private static final Log LOG = LogFactory.getLog(TableOutputFormat.class);
    /** The configuration. */
    private Configuration conf = null;

    @Override
    public void initialize(Configuration otherConf) {
        this.conf = HBaseConfiguration.create(otherConf);
        this.conf.set("hbase.master", otherConf.get("hbase.master"));
        this.conf.set("hbase.zookeeper.quorum", otherConf.get("hbase.zookeeper.quorum"));
        String tableName = this.conf.get(OUTPUT_TABLE);
        String address = this.conf.get(QUORUM_ADDRESS);
        String serverClass = this.conf.get(REGION_SERVER_CLASS);
        String serverImpl = this.conf.get(REGION_SERVER_IMPL);
        try {
            if (address != null) {
                ZKUtil.applyClusterKeyToConf(this.conf, address);
            }
            if (serverClass != null) {
                this.conf.set(HConstants.REGION_SERVER_CLASS, serverClass);
                this.conf.set(HConstants.REGION_SERVER_IMPL, serverImpl);
            }
            HTable table = new HTable(this.conf, tableName);
            table.setAutoFlush(false);
            setTable(table);
            LOG.info("Created table instance for " + tableName);
        } catch (IOException e) {
            LOG.error("[initialize]", e);
        }
    }
}