/*
* 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.flink.core.io;
import org.apache.flink.annotation.PublicEvolving;
/**
* An input split assigner distributes the {@link InputSplit}s among the instances on which a
* data source exists.
*/
@PublicEvolving
public interface InputSplitAssigner {
/**
* Returns the next input split that shall be consumed. The consumer's host is passed as a parameter
* to allow localized assignments.
*
* @param host The host address of split requesting task.
* @param taskId The id of the split requesting task.
* @return the next input split to be consumed, or <code>null</code> if no more splits remain.
*/
InputSplit getNextInputSplit(String host, int taskId);
}