Examples of org.apache.crunch.CombineFn

org.apache.crunch.CombineFn

A special {@link DoFn} implementation that converts an {@link Iterable} ofvalues into a single value. If a {@code CombineFn} instance is used on a{@link PGroupedTable}, the function will be applied to the output of the map stage before the data is passed to the reducer, which can improve the runtime of certain classes of jobs.

Note that the incoming {@code Iterable} can only be used to create an {@code Iterator} once. Calling {@link Iterable#iterator()} method a secondtime will throw an {@link IllegalStateException}.

  public void setCombineFn(CombineFn combineFn) {
    this.combineFn = combineFn;
  }


  public CombineFn getCombineFn() {
    CombineFn ret = combineFn;
    this.combineFn = null;
    return ret;
  }

  public void setCombineFn(CombineFn combineFn) {
    this.combineFn = combineFn;
  }


  public CombineFn getCombineFn() {
    CombineFn ret = combineFn;
    this.combineFn = null;
    return ret;
  }

  public void setCombineFn(CombineFn combineFn) {
    this.combineFn = combineFn;
  }


  public CombineFn getCombineFn() {
    CombineFn ret = combineFn;
    this.combineFn = null;
    return ret;
  }

  public void setCombineFn(CombineFn combineFn) {
    this.combineFn = combineFn;
  }


  public CombineFn getCombineFn() {
    CombineFn ret = combineFn;
    this.combineFn = null;
    return ret;
  }

Examples of org.apache.crunch.CombineFn

Related Classes of org.apache.crunch.CombineFn