com.rapleaf.hank.hadoop.DomainBuilderDefaultOutputFormat.java Source code

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Here is the source code for com.rapleaf.hank.hadoop.DomainBuilderDefaultOutputFormat.java

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/**
 *  Copyright 2011 Rapleaf
 *
 *  Licensed 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.rapleaf.hank.hadoop;

import java.io.IOException;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.util.Progressable;

import com.rapleaf.hank.coordinator.Domain;
import com.rapleaf.hank.storage.VersionType;

public class DomainBuilderDefaultOutputFormat extends DomainBuilderOutputFormat {

    public void checkOutputSpecs(FileSystem fs, JobConf conf) throws IOException {
        // No need to check if the output path exists. It probably will since
        // we store all versions in the same root directory.
    }

    public RecordWriter<KeyAndPartitionWritable, ValueWritable> getRecordWriter(FileSystem fs, JobConf conf,
            String name, Progressable progressable) throws IOException {

        // Implicitly relies on the FileOutputCommitter
        String outputPath = conf.get("mapred.work.output.dir");
        if (outputPath == null) {
            throw new RuntimeException("Path was not set in mapred.work.output.dir");
        }

        // Load configuration items
        String domainName = DomainBuilderProperties.getDomainName(conf);
        VersionType versionType = DomainBuilderProperties.getVersionType(domainName, conf);
        // Load config
        Domain domain = DomainBuilderProperties.getDomain(conf);
        // Build RecordWriter with the Domain
        return new DomainBuilderRecordWriter(domain, versionType, new HDFSOutputStreamFactory(fs, outputPath));
    }
}