org.apache.hadoop.hive.llap.LlapOutputFormat Maven / Gradle / Ivy
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* 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,
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package org.apache.hadoop.hive.llap;
import java.io.IOException;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputFormat;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.util.Progressable;
import org.apache.hadoop.hive.llap.io.api.LlapProxy;
import org.apache.hadoop.hive.ql.io.StreamingOutputFormat;
import com.google.common.base.Preconditions;
public class LlapOutputFormat
implements OutputFormat, StreamingOutputFormat {
public static final String LLAP_OF_ID_KEY = "llap.of.id";
@Override
public void checkOutputSpecs(FileSystem ignored, JobConf job) throws IOException {
}
@Override
public RecordWriter getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress) throws IOException {
if (!LlapProxy.isDaemon()) {
throw new IOException("LlapOutputFormat can only be used inside Llap");
}
try {
return LlapOutputFormatService.get().getWriter(job.get(LLAP_OF_ID_KEY));
} catch (InterruptedException e) {
throw new IOException(e);
}
}
}