[154] | 1 | package ro.pub.cs.pp.pdad; |
---|
| 2 | |
---|
| 3 | import java.io.DataInput; |
---|
| 4 | import java.io.DataOutput; |
---|
| 5 | import java.io.IOException; |
---|
| 6 | import java.util.HashMap; |
---|
| 7 | |
---|
| 8 | import org.apache.hadoop.fs.Path; |
---|
| 9 | import org.apache.hadoop.conf.Configuration; |
---|
| 10 | import org.apache.hadoop.io.Text; |
---|
| 11 | import org.apache.hadoop.io.IntWritable; |
---|
| 12 | import org.apache.hadoop.io.WritableComparable; |
---|
| 13 | import org.apache.hadoop.io.WritableComparator; |
---|
| 14 | import org.apache.hadoop.mapreduce.Job; |
---|
| 15 | import org.apache.hadoop.mapreduce.Mapper; |
---|
| 16 | import org.apache.hadoop.mapreduce.Reducer; |
---|
| 17 | import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
---|
| 18 | import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
---|
| 19 | |
---|
| 20 | public class EndReasonStat { |
---|
| 21 | |
---|
| 22 | private static int[] domains = {-1, 0, 1, 1000, 2000, 3000, 4000, 5000, 6000, 7000}; |
---|
| 23 | private static String[] reasonName = {"not reported", "undetermined", "infrastructure", "hardware", "IO", "network", "software", "human error", "user"}; |
---|
| 24 | |
---|
| 25 | public static class IntPair implements WritableComparable<IntPair> { |
---|
| 26 | private int first = 0; |
---|
| 27 | private int second = 0; |
---|
| 28 | |
---|
| 29 | /** |
---|
| 30 | * Set the left and right values. |
---|
| 31 | */ |
---|
| 32 | public void set(int left, int right) { |
---|
| 33 | first = left; |
---|
| 34 | second = right; |
---|
| 35 | } |
---|
| 36 | |
---|
| 37 | public int getFirst() { |
---|
| 38 | return first; |
---|
| 39 | } |
---|
| 40 | |
---|
| 41 | public int getSecond() { |
---|
| 42 | return second; |
---|
| 43 | } |
---|
| 44 | |
---|
| 45 | /** |
---|
| 46 | * Read the two integers. Encoded as: MIN_VALUE -> 0, 0 -> -MIN_VALUE, |
---|
| 47 | * MAX_VALUE-> -1 |
---|
| 48 | */ |
---|
| 49 | @Override |
---|
| 50 | public void readFields(DataInput in) throws IOException { |
---|
| 51 | first = in.readInt() + Integer.MIN_VALUE; |
---|
| 52 | second = in.readInt() + Integer.MIN_VALUE; |
---|
| 53 | } |
---|
| 54 | |
---|
| 55 | @Override |
---|
| 56 | public void write(DataOutput out) throws IOException { |
---|
| 57 | out.writeInt(first - Integer.MIN_VALUE); |
---|
| 58 | out.writeInt(second - Integer.MIN_VALUE); |
---|
| 59 | } |
---|
| 60 | |
---|
| 61 | @Override |
---|
| 62 | public int hashCode() { |
---|
| 63 | return first * 157 + second; |
---|
| 64 | } |
---|
| 65 | |
---|
| 66 | @Override |
---|
| 67 | public boolean equals(Object right) { |
---|
| 68 | if (right instanceof IntPair) { |
---|
| 69 | IntPair r = (IntPair) right; |
---|
| 70 | return r.first == first && r.second == second; |
---|
| 71 | } else { |
---|
| 72 | return false; |
---|
| 73 | } |
---|
| 74 | } |
---|
| 75 | |
---|
| 76 | /** A Comparator that compares serialized IntPair. */ |
---|
| 77 | public static class Comparator extends WritableComparator { |
---|
| 78 | public Comparator() { |
---|
| 79 | super(IntPair.class); |
---|
| 80 | } |
---|
| 81 | |
---|
| 82 | public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, |
---|
| 83 | int l2) { |
---|
| 84 | return compareBytes(b1, s1, l1, b2, s2, l2); |
---|
| 85 | } |
---|
| 86 | } |
---|
| 87 | |
---|
| 88 | static { // register this comparator |
---|
| 89 | WritableComparator.define(IntPair.class, new Comparator()); |
---|
| 90 | } |
---|
| 91 | |
---|
| 92 | @Override |
---|
| 93 | public int compareTo(IntPair o) { |
---|
| 94 | if (first != o.first) { |
---|
| 95 | return first < o.first ? -1 : 1; |
---|
| 96 | } else if (second != o.second) { |
---|
| 97 | return second < o.second ? -1 : 1; |
---|
| 98 | } else { |
---|
| 99 | return 0; |
---|
| 100 | } |
---|
| 101 | } |
---|
| 102 | } |
---|
| 103 | |
---|
| 104 | public static class Map extends Mapper<Object, Text, IntWritable, IntPair> { |
---|
| 105 | |
---|
| 106 | private static String null_reason = "NULL"; |
---|
| 107 | |
---|
| 108 | private final static IntPair onePair = new IntPair(); |
---|
| 109 | private final static IntWritable zero = new IntWritable(0); |
---|
| 110 | private final static int fieldNo = 9; |
---|
| 111 | |
---|
| 112 | private int findDomainCode(int reasonCode) { |
---|
| 113 | for (int domainCode = 0; domainCode < domains.length - 1; domainCode++) { |
---|
| 114 | if (domains[domainCode] <= reasonCode && reasonCode < domains[domainCode + 1]) |
---|
| 115 | return domainCode; |
---|
| 116 | } |
---|
| 117 | return 0; |
---|
| 118 | } |
---|
| 119 | |
---|
| 120 | private int extractReasonCode(String line) { |
---|
| 121 | String[] pieces = line.split("\\s+"); |
---|
| 122 | if (pieces.length < fieldNo + 1) { |
---|
| 123 | return 0; |
---|
| 124 | } |
---|
| 125 | String reason = pieces[fieldNo]; |
---|
| 126 | |
---|
| 127 | if (reason.equals(null_reason)) { |
---|
| 128 | return 0; |
---|
| 129 | } else { |
---|
| 130 | int reasonCode = Integer.parseInt(reason); |
---|
| 131 | return reasonCode; |
---|
| 132 | } |
---|
| 133 | } |
---|
| 134 | |
---|
| 135 | public void map(Object key, Text value, Context context) throws IOException, InterruptedException { |
---|
| 136 | String line = value.toString(); |
---|
| 137 | try { |
---|
| 138 | int reasonCode = extractReasonCode(line); |
---|
| 139 | int reasonDomainCode = findDomainCode(reasonCode); |
---|
| 140 | onePair.set(reasonCode, 1); |
---|
| 141 | context.write(new IntWritable(reasonDomainCode), onePair); |
---|
| 142 | } catch (NumberFormatException ex) { |
---|
| 143 | onePair.set(0, 0); |
---|
| 144 | context.write(zero, onePair); |
---|
| 145 | } |
---|
| 146 | |
---|
| 147 | } |
---|
| 148 | } |
---|
| 149 | |
---|
| 150 | |
---|
| 151 | public static class Reduce extends Reducer <IntWritable, IntPair, Text, IntWritable> { |
---|
| 152 | |
---|
| 153 | private Text reason = new Text(); |
---|
| 154 | |
---|
| 155 | public void reduce(IntWritable key, Iterable<IntPair> values, Context context) throws IOException, InterruptedException { |
---|
| 156 | /* write the domain name */ |
---|
| 157 | reason.set(reasonName[key.get()]); |
---|
| 158 | context.write(reason, null); |
---|
| 159 | |
---|
| 160 | HashMap<Integer, Integer> reasonSum = new HashMap<Integer, Integer>(); |
---|
| 161 | for (IntPair pair : values) { |
---|
| 162 | int reasonCode = pair.getFirst(); |
---|
| 163 | if (reasonSum.containsKey(reasonCode)) { |
---|
| 164 | int newSum = reasonSum.get(reasonCode) + pair.getSecond(); |
---|
| 165 | reasonSum.put(reasonCode, newSum); |
---|
| 166 | } else { |
---|
| 167 | reasonSum.put(reasonCode, pair.getSecond()); |
---|
| 168 | } |
---|
| 169 | } |
---|
| 170 | |
---|
| 171 | for (int reasonCode : reasonSum.keySet()) { |
---|
| 172 | reason.set(new String("\t" +reasonCode)); |
---|
| 173 | context.write(reason, new IntWritable(reasonSum.get(reasonCode))); |
---|
| 174 | } |
---|
| 175 | } |
---|
| 176 | } |
---|
| 177 | |
---|
| 178 | public static void main(String[] args) throws Exception { |
---|
| 179 | Configuration conf = new Configuration(); |
---|
| 180 | Job job = new Job(conf, "EndReasonStat"); |
---|
| 181 | job.setNumReduceTasks(5); |
---|
| 182 | job.setJarByClass(EndReasonStat.class); |
---|
| 183 | |
---|
| 184 | /* set map output key/value classes */ |
---|
| 185 | job.setMapOutputKeyClass(IntWritable.class); |
---|
| 186 | job.setMapOutputValueClass(IntPair.class); |
---|
| 187 | |
---|
| 188 | /* set application output key/value classes */ |
---|
| 189 | job.setOutputKeyClass(Text.class); |
---|
| 190 | job.setOutputValueClass(IntWritable.class); |
---|
| 191 | |
---|
| 192 | job.setMapperClass(Map.class); |
---|
| 193 | job.setReducerClass(Reduce.class); |
---|
| 194 | /* don't set any combiner class */ |
---|
| 195 | |
---|
| 196 | FileInputFormat.addInputPath(job, new Path(args[0])); |
---|
| 197 | FileOutputFormat.setOutputPath(job, new Path(args[1])); |
---|
| 198 | |
---|
| 199 | System.exit(job.waitForCompletion(true) ? 0 : 1); |
---|
| 200 | } |
---|
| 201 | |
---|
| 202 | } |
---|
| 203 | |
---|