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Google App Engine API for connecting together complex workflows

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// Copyright 2011 Google Inc.
//
// 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.google.appengine.tools.pipeline;

/**
 * A user's job class should subclass a specialization of this class if the job
 * takes three input parameter.
 *
 * @author [email protected] (Mitch Rudominer)
 *
 * @param  The type of the job's output.
 * @param  The type of the job's first input.
 * @param  The type of the job's second input.
 * @param  The type of the job's third input.
 * @see Job
 */
public abstract class Job3 extends Job {

  private static final long serialVersionUID = 241828296242020836L;

  /**
   * Users must define this method in their job class.
   *
   * @throws Exception in case of job failure.
   */
  public abstract Value run(T1 param1, T2 param2, T3 param4) throws Exception;
}