tez-api/src/main/java/org/apache/tez/runtime/api/LogicalOutput.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.tez.runtime.api;

/**
 * An @link {@link Output} which handles all outgoing physical connections on an
 * edge. A {@link LogicalIOProcessor} sees a single Logical Output per outgoing
 * edge.
 */
public interface LogicalOutput extends Output {
  /**
   * Sets the number of physical ouputs that this <code>LogicalOutput</code>
   * will receive. This will be called by the Tez framework before initializing
   * the <code>LogicalOutput</code>
   * 
   * @param numOutputs
   *          the number of physical outputs
   */
  public void setNumPhysicalOutputs(int numOutputs);
}