/**
* 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;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Evolving;
import org.apache.tez.dag.api.Vertex;
/**
* Provides various statistics about physical execution activity happening on a
* logical input in a {@link Vertex}. Inputs can be external inputs or inputs
* from other vertices.
*/
@Public
@Evolving
public interface InputStatistics {
/**
* Returns the data size associated with this logical input
* <br>It is the size of the data read from this input by the vertex.
* @return Data size in bytes
*/
public long getDataSize();
/**
* Get the numbers of items processed. These could be key-value pairs, table
* records etc.
*
* @return Number of items processed
*/
public long getItemsProcessed();
}