ReduceContextImpl.java 文件源码

public ReduceContextImpl(Configuration conf, TaskAttemptID taskid,
                         RawKeyValueIterator input, 
                         Counter inputKeyCounter,
                         Counter inputValueCounter,
                         RecordWriter<KEYOUT,VALUEOUT> output,
                         OutputCommitter committer,
                         StatusReporter reporter,
                         RawComparator<KEYIN> comparator,
                         Class<KEYIN> keyClass,
                         Class<VALUEIN> valueClass
                        ) throws InterruptedException, IOException{
  super(conf, taskid, output, committer, reporter);
  this.input = input;
  this.inputKeyCounter = inputKeyCounter;
  this.inputValueCounter = inputValueCounter;
  this.comparator = comparator;
  this.serializationFactory = new SerializationFactory(conf);
  this.keyDeserializer = serializationFactory.getDeserializer(keyClass);
  this.keyDeserializer.open(buffer);
  this.valueDeserializer = serializationFactory.getDeserializer(valueClass);
  this.valueDeserializer.open(buffer);
  hasMore = input.next();
  this.keyClass = keyClass;
  this.valueClass = valueClass;
  this.conf = conf;
  this.taskid = taskid;
}