/// <exception cref="System.IO.IOException"/>
/// <exception cref="System.Exception"/>
protected override void Cleanup(Mapper.Context context)
{
if (lastKey != null)
{
context.Write(new Text(filename + ":end"), lastKey);
context.Write(Checksum, new Text(checksum.ToString()));
}
}
/// <exception cref="System.IO.IOException"/>
/// <exception cref="System.Exception"/>
protected override void Reduce(Text key, IEnumerable <Text> values, Reducer.Context
context)
{
if (Error.Equals(key))
{
foreach (Text val in values)
{
context.Write(key, val);
}
}
else
{
if (Checksum.Equals(key))
{
Unsigned16 tmp = new Unsigned16();
Unsigned16 sum = new Unsigned16();
foreach (Text val in values)
{
tmp.Set(val.ToString());
sum.Add(tmp);
}
context.Write(Checksum, new Text(sum.ToString()));
}
else
{
Text value = values.GetEnumerator().Next();
if (firstKey)
{
firstKey = false;
}
else
{
if (value.CompareTo(lastValue) < 0)
{
context.Write(Error, new Text("bad key partitioning:\n file " + lastKey + " key "
+ TextifyBytes(lastValue) + "\n file " + key + " key " + TextifyBytes(value)));
}
}
lastKey.Set(key);
lastValue.Set(value);
}
}
}
