| /** |
| * 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.Edge; |
| import org.apache.tez.dag.api.Vertex; |
| |
| /** |
| * Provides various statistics about the physical execution of this |
| * {@link Vertex}<br> |
| * This only provides point in time values for the statistics and values are |
| * refreshed based on when the implementations of the inputs/outputs/tasks etc. |
| * update their reported statistics. The values may increase or decrease based |
| * on task completions or failures. |
| */ |
| @Public |
| @Evolving |
| public interface VertexStatistics { |
| |
| /** |
| * Get statistics about an {@link Edge} input or external input of this |
| * {@link Vertex}. <br> |
| * |
| * @param inputName |
| * Name of the input {@link Edge} or external input of this vertex |
| * @return {@link InputStatistics} for the given input |
| */ |
| public InputStatistics getInputStatistics(String inputName); |
| |
| /** |
| * Get statistics about an {@link Edge} output or external output of this |
| * {@link Vertex}. <br> |
| * |
| * @param outputName |
| * Name of the output {@link Edge} or external output of this vertex |
| * @return {@link OutputStatistics} for the given output |
| */ |
| public OutputStatistics getOutputStatistics(String outputName); |
| |
| } |