Changes between Initial Version and Version 1 of waue/2011/0425_Itri2Count

Timestamp:

Apr 25, 2011, 4:19:29 PM (15 years ago)

Author:

waue

Comment:

--

waue/2011/0425_Itri2Count

@@ +1 @@
+{{{
+#!java
+
+package itri;
+
+// TRI serial program number 2 
+// 0. after Itri1LoadFile 
+// 1. build several .txt files to /tmp/income/
+//       txt format is as: 
+//              <any>:store:product:<other>
+//              xxx:T01:P4:000
+//              ooo:T02:P1:bbs
+//              oo:T03:P1:0sf0
+// 2. put /tmp/itri/income to hdfs: /user/xxxx/income
+// 3. run it
+// 
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.mapreduce.TableOutputFormat;
+import org.apache.hadoop.hbase.mapreduce.TableReducer;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.Mapper;
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
+import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
+
+public class Itri2Count {
+        public static class HtMap extends
+                        Mapper<LongWritable, Text, Text, IntWritable> {
+                private IntWritable one = new IntWritable(1);
+                public void map(LongWritable key, Text value, Context context)
+                                throws IOException, InterruptedException {
+                        String s[] = value.toString().trim().split(":");
+                        // xxx:T01:P4:oooo => T01@P4
+                        String str = s[1] + "@" + s[2];
+                        context.write(new Text(str), one);
+                }
+        }
+
+        public static class HtReduce extends
+                        TableReducer<Text, IntWritable, LongWritable> {
+                public void reduce(Text key, Iterable<IntWritable> values,
+                                Context context) throws IOException, InterruptedException {
+                        int sum = 0;
+                        for (IntWritable i : values) {
+                                sum += i.get();
+                        }
+                        // T01@P4 => ( row = T01 , Column= Turnover:P4 )
+                        String[] str = (key.toString()).split("@");
+                        byte[] row = (str[0]).getBytes();
+                        byte[] family = Bytes.toBytes("Turnover");
+                        byte[] qualifier = (str[1]).getBytes();
+                        byte[] summary = Bytes.toBytes(String.valueOf(sum));
+                        Put put = new Put(row);
+                        put.add(family, qualifier, summary );
+                        context.write(new LongWritable(), put);
+                }
+        }
+
+        public static void main(String args[]) throws Exception {
+                // debug
+
+                String input = "income";
+
+                String tablename = "itri";
+
+                Configuration conf = new Configuration();
+
+                conf.set(TableOutputFormat.OUTPUT_TABLE, tablename);
+
+                Job job = new Job(conf, "Count to itri");
+
+                job.setJarByClass(Itri2Count.class);
+
+                job.setMapperClass(HtMap.class);
+                job.setReducerClass(HtReduce.class);
+
+                job.setMapOutputKeyClass(Text.class);
+                job.setMapOutputValueClass(IntWritable.class);
+
+                job.setInputFormatClass(TextInputFormat.class);
+
+                job.setOutputFormatClass(TableOutputFormat.class);
+
+                FileInputFormat.addInputPath(job, new Path(input));
+
+                System.exit(job.waitForCompletion(true) ? 0 : 1);
+        }
+}
+
+}}}