org.apache.hadoop.hive.llap.ConsumerFeedback Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of hive-llap-server

There is a newer version: 4.0.1

/*
 * 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.hadoop.hive.llap;

/**
 * Consumer feedback typically used by Consumer;
 * allows consumer to influence production of data.
 */
public interface ConsumerFeedback {
  /** Pause data production. */
  public void pause();
  /** Unpause data production. */
  public void unpause();
  /** Stop data production, the external operation has been cancelled. */
  public void stop();
  /** Returns processed data back to producer; necessary if e.g. data is locked in cache. */
  public void returnData(T data);
}