TestFileInputFormatPathFilter.java
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上传日期:2018-01-08
资源大小:41811k
文件大小:4k
源码类别:
网格计算
开发平台:
Java
- /**
- * 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.mapred;
- import junit.framework.TestCase;
- import org.apache.hadoop.fs.FileStatus;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.fs.PathFilter;
- import java.io.IOException;
- import java.io.Writer;
- import java.io.OutputStreamWriter;
- import java.util.Set;
- import java.util.HashSet;
- public class TestFileInputFormatPathFilter extends TestCase {
- public static class DummyFileInputFormat extends FileInputFormat {
- public RecordReader getRecordReader(InputSplit split, JobConf job,
- Reporter reporter) throws IOException {
- return null;
- }
- }
- private static FileSystem localFs = null;
- static {
- try {
- localFs = FileSystem.getLocal(new JobConf());
- } catch (IOException e) {
- throw new RuntimeException("init failure", e);
- }
- }
- private static Path workDir =
- new Path(new Path(System.getProperty("test.build.data", "."), "data"),
- "TestFileInputFormatPathFilter");
- public void setUp() throws Exception {
- tearDown();
- localFs.mkdirs(workDir);
- }
- public void tearDown() throws Exception {
- if (localFs.exists(workDir)) {
- localFs.delete(workDir, true);
- }
- }
- protected Path createFile(String fileName) throws IOException {
- Path file = new Path(workDir, fileName);
- Writer writer = new OutputStreamWriter(localFs.create(file));
- writer.write("");
- writer.close();
- return localFs.makeQualified(file);
- }
- protected Set<Path> createFiles() throws IOException {
- Set<Path> files = new HashSet<Path>();
- files.add(createFile("a"));
- files.add(createFile("b"));
- files.add(createFile("aa"));
- files.add(createFile("bb"));
- files.add(createFile("_hello"));
- files.add(createFile(".hello"));
- return files;
- }
- public static class TestPathFilter implements PathFilter {
- public boolean accept(Path path) {
- String name = path.getName();
- return name.equals("TestFileInputFormatPathFilter") || name.length() == 1;
- }
- }
- private void _testInputFiles(boolean withFilter, boolean withGlob) throws Exception {
- Set<Path> createdFiles = createFiles();
- JobConf conf = new JobConf();
- Path inputDir = (withGlob) ? new Path(workDir, "a*") : workDir;
- FileInputFormat.setInputPaths(conf, inputDir);
- conf.setInputFormat(DummyFileInputFormat.class);
- if (withFilter) {
- FileInputFormat.setInputPathFilter(conf, TestPathFilter.class);
- }
- DummyFileInputFormat inputFormat =
- (DummyFileInputFormat) conf.getInputFormat();
- Set<Path> computedFiles = new HashSet<Path>();
- for (FileStatus file : inputFormat.listStatus(conf)) {
- computedFiles.add(file.getPath());
- }
- createdFiles.remove(localFs.makeQualified(new Path(workDir, "_hello")));
- createdFiles.remove(localFs.makeQualified(new Path(workDir, ".hello")));
- if (withFilter) {
- createdFiles.remove(localFs.makeQualified(new Path(workDir, "aa")));
- createdFiles.remove(localFs.makeQualified(new Path(workDir, "bb")));
- }
- if (withGlob) {
- createdFiles.remove(localFs.makeQualified(new Path(workDir, "b")));
- createdFiles.remove(localFs.makeQualified(new Path(workDir, "bb")));
- }
- assertEquals(createdFiles, computedFiles);
- }
- public void testWithoutPathFilterWithoutGlob() throws Exception {
- _testInputFiles(false, false);
- }
- public void testWithoutPathFilterWithGlob() throws Exception {
- _testInputFiles(false, true);
- }
- public void testWithPathFilterWithoutGlob() throws Exception {
- _testInputFiles(true, false);
- }
- public void testWithPathFilterWithGlob() throws Exception {
- _testInputFiles(true, true);
- }
- }