| /* |
| * 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.fluo.mapreduce; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| |
| import org.apache.fluo.api.client.FluoClient; |
| import org.apache.fluo.api.client.FluoFactory; |
| import org.apache.fluo.api.client.Loader; |
| import org.apache.fluo.api.client.LoaderExecutor; |
| import org.apache.fluo.api.config.FluoConfiguration; |
| import org.apache.fluo.api.config.SimpleConfiguration; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.OutputFormat; |
| import org.apache.hadoop.mapreduce.RecordWriter; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| |
| /** |
| * This output format enables the execution of load transaction against a Fluo table using map |
| * reduce. |
| */ |
| public class FluoOutputFormat extends OutputFormat<Loader, NullWritable> { |
| |
| private static String PROPS_CONF_KEY = FluoOutputFormat.class.getName() + ".props"; |
| |
| @Override |
| public void checkOutputSpecs(JobContext arg0) throws IOException, InterruptedException {} |
| |
| @Override |
| public OutputCommitter getOutputCommitter(TaskAttemptContext arg0) |
| throws IOException, InterruptedException { |
| return new OutputCommitter() { |
| |
| @Override |
| public void setupTask(TaskAttemptContext context) throws IOException {} |
| |
| @Override |
| public void setupJob(JobContext context) throws IOException { |
| |
| } |
| |
| @Override |
| public boolean needsTaskCommit(TaskAttemptContext arg0) throws IOException { |
| return false; |
| } |
| |
| @Override |
| public void commitTask(TaskAttemptContext context) throws IOException {} |
| |
| @Override |
| public void abortTask(TaskAttemptContext context) throws IOException {} |
| }; |
| } |
| |
| @Override |
| public RecordWriter<Loader, NullWritable> getRecordWriter(TaskAttemptContext context) |
| throws IOException, InterruptedException { |
| |
| ByteArrayInputStream bais = new ByteArrayInputStream( |
| context.getConfiguration().get(PROPS_CONF_KEY).getBytes(StandardCharsets.UTF_8)); |
| |
| FluoConfiguration config = new FluoConfiguration(bais); |
| |
| try { |
| final FluoClient client = FluoFactory.newClient(config); |
| final LoaderExecutor lexecutor = client.newLoaderExecutor(); |
| |
| return new RecordWriter<Loader, NullWritable>() { |
| |
| @Override |
| public void close(TaskAttemptContext context) throws IOException, InterruptedException { |
| try { |
| lexecutor.close(); |
| } finally { |
| client.close(); |
| } |
| } |
| |
| @Override |
| public void write(Loader loader, NullWritable nullw) |
| throws IOException, InterruptedException { |
| lexecutor.execute(loader); |
| } |
| }; |
| } catch (Exception e) { |
| throw new IOException(e); |
| } |
| } |
| |
| /** |
| * Call this method to initialize the Fluo connection props |
| * |
| * @param conf Job configuration |
| * @param props Use {@link org.apache.fluo.api.config.FluoConfiguration} to set props |
| * programmatically |
| */ |
| public static void configure(Job conf, SimpleConfiguration props) { |
| try { |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| props.save(baos); |
| |
| conf.getConfiguration().set(PROPS_CONF_KEY, |
| new String(baos.toByteArray(), StandardCharsets.UTF_8)); |
| |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |