org.cloudata.core.tablet.backup.RestoreBinaryMap.java Source code

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Here is the source code for org.cloudata.core.tablet.backup.RestoreBinaryMap.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.cloudata.core.tablet.backup;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import org.cloudata.core.client.DirectUploader;
import org.cloudata.core.client.CTable;
import org.cloudata.core.client.Row;
import org.cloudata.core.common.conf.CloudataConf;
import org.cloudata.core.parallel.hadoop.DefaultTabletInputFormat;

/**
 * @author jindolk
 *
 */
public class RestoreBinaryMap implements Mapper<BytesWritable, BytesWritable, Text, Text> {
    static final Log LOG = LogFactory.getLog(RestoreBinaryMap.class.getName());
    DirectUploader uploader;
    IOException confErr;
    int count = 0;
    CsvParser parser = new CsvParser();

    @Override
    public void map(BytesWritable key, BytesWritable value, OutputCollector<Text, Text> output, Reporter reporter)
            throws IOException {
        if (confErr != null) {
            throw confErr;
        }
        ByteArrayInputStream bin = new ByteArrayInputStream(key.get(), 0, key.getSize());
        DataInputStream in = new DataInputStream(bin);
        Row row = new Row();
        row.readFields(in);

        uploader.put(row);
        count++;
        if (count % 10000 == 0) {
            LOG.info(count + " cells restored");
        }
        in.close();
    }

    @Override
    public void configure(JobConf job) {
        try {
            CloudataConf nconf = new CloudataConf(job);
            CTable ctable = CTable.openTable(nconf, job.get(DefaultTabletInputFormat.OUTPUT_TABLE));
            String columns = job.get(DefaultTabletInputFormat.INPUT_COLUMN_LIST);
            uploader = ctable.openDirectUploader(columns.split(","));

        } catch (Exception e) {
            confErr = new IOException(e.getMessage());
            confErr.initCause(e);
        }
    }

    @Override
    public void close() throws IOException {
        if (uploader != null) {
            uploader.close();
        }
        LOG.info("total " + count + " cells restored");
    }
}