?? outputformatbase.java
字號(hào):
/** * Copyright 2006 The Apache Software Foundation * * Licensed 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.mapred;import java.io.IOException;import java.io.File;import org.apache.hadoop.fs.FileSystem;/** A base class for {@link OutputFormat}. */public abstract class OutputFormatBase implements OutputFormat { public abstract RecordWriter getRecordWriter(FileSystem fs, JobConf job, String name) throws IOException; public void checkOutputSpecs(FileSystem fs, JobConf job) throws IOException { // Ensure that the output directory is set and not already there File outDir = job.getOutputDir(); if (outDir == null && job.getNumReduceTasks() != 0) { throw new IOException("Output directory not set in JobConf."); } if (outDir != null && fs.exists(outDir)) { throw new IOException("Output directory " + outDir + " already exists."); } }}
?? 快捷鍵說(shuō)明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -