Author: hashutosh
Date: Tue Jan 24 03:48:43 2012
New Revision: 1235125
URL: http://svn.apache.org/viewvc?rev=1235125&view=rev
Log:
Remaining file for HCATALOG-219
Added:
incubator/hcatalog/branches/branch-0.3/src/test/e2e/hcatalog/udfs/java/org/apache/hcatalog/utils/HBaseReadWrite.java
Added:
incubator/hcatalog/branches/branch-0.3/src/test/e2e/hcatalog/udfs/java/org/apache/hcatalog/utils/HBaseReadWrite.java
URL:
http://svn.apache.org/viewvc/incubator/hcatalog/branches/branch-0.3/src/test/e2e/hcatalog/udfs/java/org/apache/hcatalog/utils/HBaseReadWrite.java?rev=1235125&view=auto
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---
incubator/hcatalog/branches/branch-0.3/src/test/e2e/hcatalog/udfs/java/org/apache/hcatalog/utils/HBaseReadWrite.java
(added)
+++
incubator/hcatalog/branches/branch-0.3/src/test/e2e/hcatalog/udfs/java/org/apache/hcatalog/utils/HBaseReadWrite.java
Tue Jan 24 03:48:43 2012
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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.apache.hcatalog.utils;
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.conf.Configured;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.DoubleWritable;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.Mapper;
+import org.apache.hadoop.mapreduce.Reducer;
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
+import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
+import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
+import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
+import org.apache.hadoop.util.GenericOptionsParser;
+import org.apache.hadoop.util.Tool;
+import org.apache.hadoop.util.ToolRunner;
+import org.apache.hcatalog.common.HCatConstants;
+import org.apache.hcatalog.data.DefaultHCatRecord;
+import org.apache.hcatalog.data.HCatRecord;
+import org.apache.hcatalog.mapreduce.HCatInputFormat;
+import org.apache.hcatalog.mapreduce.HCatOutputFormat;
+import org.apache.hcatalog.mapreduce.InputJobInfo;
+import org.apache.hcatalog.mapreduce.OutputJobInfo;
+
+/**
+ * This is a map reduce test for testing hcat which goes against the "numbers"
+ * table. It performs a group by on the first column and a SUM operation on the
+ * other columns. This is to simulate a typical operation in a map reduce
+ * program to test that hcat hands the right data to the map reduce program
+ *
+ * Usage: hadoop jar sumnumbers <serveruri> <output dir> <-libjars hive-hcat
+ * jar> The <tab|ctrla> argument controls the output delimiter The hcat jar
+ * location should be specified as file://<full path to jar>
+ */
+public class HBaseReadWrite extends Configured implements Tool {
+
+ public static class HBaseWriteMap extends
+ Mapper<LongWritable, Text, Text, Text> {
+
+ String name;
+ String age;
+ String gpa;
+
+ @Override
+ protected void map(
+ LongWritable key,
+ Text value,
+ org.apache.hadoop.mapreduce.Mapper<LongWritable, Text, Text,
Text>.Context context)
+ throws IOException, InterruptedException {
+ String line = value.toString();
+ String[] tokens = line.split("\t");
+ name = tokens[0];
+
+ context.write(new Text(name), value);
+ }
+ }
+
+
+ public static class HBaseWriteReduce extends
+ Reducer<Text, Text, WritableComparable, HCatRecord> {
+
+ String name;
+ String age;
+ String gpa;
+
+ @Override
+ protected void reduce(Text key, Iterable<Text> values, Context context)
+ throws IOException, InterruptedException {
+ name = key.toString();
+ int count = 0;
+ double sum = 0;
+ for (Text value : values) {
+ String line = value.toString();
+ String[] tokens = line.split("\t");
+ name = tokens[0];
+ age = tokens[1];
+ gpa = tokens[2];
+
+ count++;
+ sum += Double.parseDouble(gpa.toString());
+ }
+
+ HCatRecord record = new DefaultHCatRecord(2);
+ record.set(0, name);
+ record.set(1, Double.toString(sum));
+
+ context.write(null, record);
+ }
+ }
+
+ public static class HBaseReadMap extends
+ Mapper<WritableComparable, HCatRecord, Text, Text> {
+
+ String name;
+ String age;
+ String gpa;
+
+ @Override
+ protected void map(
+ WritableComparable key,
+ HCatRecord value,
+ org.apache.hadoop.mapreduce.Mapper<WritableComparable,
HCatRecord, Text, Text>.Context context)
+ throws IOException, InterruptedException {
+ name = (String) value.get(0);
+ gpa = (String) value.get(1);
+ context.write(new Text(name), new Text(gpa));
+ }
+ }
+
+
+ public int run(String[] args) throws Exception {
+ Configuration conf = getConf();
+ args = new GenericOptionsParser(conf, args).getRemainingArgs();
+
+ String serverUri = args[0];
+ String inputDir = args[1];
+ String tableName = args[2];
+ String outputDir = args[3];
+ String dbName = null;
+
+ String principalID = System
+ .getProperty(HCatConstants.HCAT_METASTORE_PRINCIPAL);
+ if (principalID != null)
+ conf.set(HCatConstants.HCAT_METASTORE_PRINCIPAL, principalID);
+ conf.set("hcat.hbase.output.bulkMode", "false");
+ Job job = new Job(conf, "HBaseWrite");
+ FileInputFormat.setInputPaths(job, inputDir);
+
+ job.setInputFormatClass(TextInputFormat.class);
+ job.setOutputFormatClass(HCatOutputFormat.class);
+ job.setJarByClass(HBaseReadWrite.class);
+ job.setMapperClass(HBaseWriteMap.class);
+ job.setMapOutputKeyClass(Text.class);
+ job.setMapOutputValueClass(Text.class);
+ job.setReducerClass(HBaseWriteReduce.class);
+ job.setOutputKeyClass(WritableComparable.class);
+ job.setOutputValueClass(DefaultHCatRecord.class);
+ HCatOutputFormat.setOutput(job, OutputJobInfo.create(dbName,
+ tableName, null, serverUri, principalID));
+
+ boolean succ = job.waitForCompletion(true);
+
+ if (!succ) return 1;
+
+ job = new Job(conf, "HBaseRead");
+ HCatInputFormat.setInput(job, InputJobInfo.create(dbName, tableName,
+ null, serverUri, principalID));
+
+ job.setInputFormatClass(HCatInputFormat.class);
+ job.setOutputFormatClass(TextOutputFormat.class);
+ job.setJarByClass(HBaseReadWrite.class);
+ job.setMapperClass(HBaseReadMap.class);
+ job.setOutputKeyClass(Text.class);
+ job.setOutputValueClass(Text.class);
+ job.setNumReduceTasks(0);
+ TextOutputFormat.setOutputPath(job, new Path(outputDir));
+
+ succ = job.waitForCompletion(true);
+
+ if (!succ) return 2;
+
+ return 0;
+ }
+
+ public static void main(String[] args) throws Exception {
+ int exitCode = ToolRunner.run(new HBaseReadWrite(), args);
+ System.exit(exitCode);
+ }
+}
