LocalTemplateTap.java

/*
 * Copyright (c) 2007-2013 Concurrent, Inc. All Rights Reserved.
 *
 * Project and contact information: http://www.cascading.org/
 *
 * This file is part of the Cascading project.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.guokr.hebo.tap;

import java.beans.ConstructorProperties;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;

import cascading.flow.FlowProcess;
import cascading.tap.SinkMode;
import cascading.tap.Tap;
import cascading.tap.local.FileTap;
import cascading.tap.local.io.TapFileOutputStream;
import cascading.tuple.TupleEntrySchemeCollector;

public class LocalTemplateTap extends BaseTemplateTap<Properties, OutputStream> {

  private Granularity input;
  private Granularity output;

  @ConstructorProperties({ "parent", "pathTemplate", "pathFields" })
  public LocalTemplateTap(FileTap parent, Granularity input, Granularity output) {
    this(parent, input,output, OPEN_TAPS_THRESHOLD_DEFAULT);
  }

  @ConstructorProperties({ "parent", "pathTemplate", "pathFields",
      "openTapsThreshold" })
  public LocalTemplateTap(FileTap parent, Granularity input, Granularity output
      , int openTapsThreshold) {
    super(parent, input,output, openTapsThreshold);
    this.input = input;
    this.output = output;
  }

  @ConstructorProperties({ "parent", "pathTemplate", "pathFields", "sinkMode" })
  public LocalTemplateTap(FileTap parent, Granularity input, Granularity output
      , SinkMode sinkMode) {
    super(parent, input,output, sinkMode);
    this.input = input;
    this.output = output;
  }

  @ConstructorProperties({ "parent", "pathTemplate", "pathFields",
      "sinkMode", "keepParentOnDelete" })
  public LocalTemplateTap(FileTap parent, Granularity input, Granularity output
      , SinkMode sinkMode, boolean keepParentOnDelete) {
    this(parent, input,output, sinkMode, keepParentOnDelete,
        OPEN_TAPS_THRESHOLD_DEFAULT);
  }

  @ConstructorProperties({ "parent", "pathTemplate", "pathFields",
      "sinkMode", "keepParentOnDelete", "openTapsThreshold" })
  public LocalTemplateTap(FileTap parent, Granularity input, Granularity output
      , SinkMode sinkMode, boolean keepParentOnDelete,
      int openTapsThreshold) {
    super(parent, input,output, sinkMode, keepParentOnDelete,
        openTapsThreshold);
    this.input = input;
    this.output = output;
  }

  @Override
  protected TupleEntrySchemeCollector createTupleEntrySchemeCollector(
      FlowProcess<Properties> flowProcess, Tap parent, String path)
      throws IOException {
    TapFileOutputStream output = new TapFileOutputStream(parent, path,
        isUpdate()); // append if we are in update mode

    return new TupleEntrySchemeCollector<Properties, OutputStream>(
        flowProcess, parent, output);
  }
}