HADOOP-9740. Fix FsShell '-text' command to be able to read Avro files stored in HDFS. Contributed by Allan Yan.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1513684 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Doug Cutting 2013-08-13 23:04:55 +00:00
parent dede30cf2f
commit 36cedca874
3 changed files with 225 additions and 1 deletions

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@ -276,6 +276,9 @@ Trunk (Unreleased)
HADOOP-9847. TestGlobPath symlink tests fail to cleanup properly.
(cmccabe via wang)
HADOOP-9740. Fix FsShell '-text' command to be able to read Avro
files stored in HDFS and other filesystems. (Allan Yan via cutting)
OPTIMIZATIONS
HADOOP-7761. Improve the performance of raw comparisons. (todd)

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@ -35,8 +35,10 @@
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.AvroFSInput;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileChecksum;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathIsDirectoryException;
@ -259,8 +261,9 @@ public AvroFileInputStream(FileStatus status) throws IOException {
pos = 0;
buffer = new byte[0];
GenericDatumReader<Object> reader = new GenericDatumReader<Object>();
FileContext fc = FileContext.getFileContext(new Configuration());
fileReader =
DataFileReader.openReader(new File(status.getPath().toUri()), reader);
DataFileReader.openReader(new AvroFSInput(fc, status.getPath()),reader);
Schema schema = fileReader.getSchema();
writer = new GenericDatumWriter<Object>(schema);
output = new ByteArrayOutputStream();

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@ -0,0 +1,218 @@
/**
* 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.fs.shell;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.lang.reflect.Method;
import org.apache.commons.io.IOUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* This class tests the logic for displaying the binary formats supported
* by the Text command.
*/
public class TestTextCommand {
private static final String TEST_ROOT_DIR =
System.getProperty("test.build.data", "build/test/data/") + "/testText";
private static final Path AVRO_FILENAME = new Path(TEST_ROOT_DIR, "weather.avro");
private static MiniDFSCluster cluster;
private static FileSystem fs;
@Before
public void setUp() throws IOException{
Configuration conf = new HdfsConfiguration();
cluster = new MiniDFSCluster.Builder(conf).build();
cluster.waitActive();
fs = cluster.getFileSystem();
}
@After
public void tearDown() throws IOException{
if(fs != null){
fs.close();
}
if(cluster != null){
cluster.shutdown();
}
}
/**
* Tests whether binary Avro data files are displayed correctly.
*/
@Test
public void testDisplayForAvroFiles() throws Exception {
// Create a small Avro data file on the HDFS.
createAvroFile(generateWeatherAvroBinaryData());
// Prepare and call the Text command's protected getInputStream method
// using reflection.
Configuration conf = fs.getConf();
PathData pathData = new PathData(AVRO_FILENAME.toString(), conf);
Display.Text text = new Display.Text();
text.setConf(conf);
Method method = text.getClass().getDeclaredMethod(
"getInputStream", PathData.class);
method.setAccessible(true);
InputStream stream = (InputStream) method.invoke(text, pathData);
String output = inputStreamToString(stream);
// Check the output.
String expectedOutput =
"{\"station\":\"011990-99999\",\"time\":-619524000000,\"temp\":0}" +
System.getProperty("line.separator") +
"{\"station\":\"011990-99999\",\"time\":-619506000000,\"temp\":22}" +
System.getProperty("line.separator") +
"{\"station\":\"011990-99999\",\"time\":-619484400000,\"temp\":-11}" +
System.getProperty("line.separator") +
"{\"station\":\"012650-99999\",\"time\":-655531200000,\"temp\":111}" +
System.getProperty("line.separator") +
"{\"station\":\"012650-99999\",\"time\":-655509600000,\"temp\":78}" +
System.getProperty("line.separator");
assertEquals(expectedOutput, output);
}
private String inputStreamToString(InputStream stream) throws IOException {
StringWriter writer = new StringWriter();
IOUtils.copy(stream, writer);
return writer.toString();
}
private void createAvroFile(byte[] contents) throws IOException {
FSDataOutputStream stream = fs.create(AVRO_FILENAME);
stream.write(contents);
stream.close();
assertTrue(fs.exists(AVRO_FILENAME));
}
private byte[] generateWeatherAvroBinaryData() {
// The contents of a simple binary Avro file with weather records.
byte[] contents = {
(byte) 0x4f, (byte) 0x62, (byte) 0x6a, (byte) 0x1,
(byte) 0x4, (byte) 0x14, (byte) 0x61, (byte) 0x76,
(byte) 0x72, (byte) 0x6f, (byte) 0x2e, (byte) 0x63,
(byte) 0x6f, (byte) 0x64, (byte) 0x65, (byte) 0x63,
(byte) 0x8, (byte) 0x6e, (byte) 0x75, (byte) 0x6c,
(byte) 0x6c, (byte) 0x16, (byte) 0x61, (byte) 0x76,
(byte) 0x72, (byte) 0x6f, (byte) 0x2e, (byte) 0x73,
(byte) 0x63, (byte) 0x68, (byte) 0x65, (byte) 0x6d,
(byte) 0x61, (byte) 0xf2, (byte) 0x2, (byte) 0x7b,
(byte) 0x22, (byte) 0x74, (byte) 0x79, (byte) 0x70,
(byte) 0x65, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x72, (byte) 0x65, (byte) 0x63, (byte) 0x6f,
(byte) 0x72, (byte) 0x64, (byte) 0x22, (byte) 0x2c,
(byte) 0x22, (byte) 0x6e, (byte) 0x61, (byte) 0x6d,
(byte) 0x65, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x57, (byte) 0x65, (byte) 0x61, (byte) 0x74,
(byte) 0x68, (byte) 0x65, (byte) 0x72, (byte) 0x22,
(byte) 0x2c, (byte) 0x22, (byte) 0x6e, (byte) 0x61,
(byte) 0x6d, (byte) 0x65, (byte) 0x73, (byte) 0x70,
(byte) 0x61, (byte) 0x63, (byte) 0x65, (byte) 0x22,
(byte) 0x3a, (byte) 0x22, (byte) 0x74, (byte) 0x65,
(byte) 0x73, (byte) 0x74, (byte) 0x22, (byte) 0x2c,
(byte) 0x22, (byte) 0x66, (byte) 0x69, (byte) 0x65,
(byte) 0x6c, (byte) 0x64, (byte) 0x73, (byte) 0x22,
(byte) 0x3a, (byte) 0x5b, (byte) 0x7b, (byte) 0x22,
(byte) 0x6e, (byte) 0x61, (byte) 0x6d, (byte) 0x65,
(byte) 0x22, (byte) 0x3a, (byte) 0x22, (byte) 0x73,
(byte) 0x74, (byte) 0x61, (byte) 0x74, (byte) 0x69,
(byte) 0x6f, (byte) 0x6e, (byte) 0x22, (byte) 0x2c,
(byte) 0x22, (byte) 0x74, (byte) 0x79, (byte) 0x70,
(byte) 0x65, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x73, (byte) 0x74, (byte) 0x72, (byte) 0x69,
(byte) 0x6e, (byte) 0x67, (byte) 0x22, (byte) 0x7d,
(byte) 0x2c, (byte) 0x7b, (byte) 0x22, (byte) 0x6e,
(byte) 0x61, (byte) 0x6d, (byte) 0x65, (byte) 0x22,
(byte) 0x3a, (byte) 0x22, (byte) 0x74, (byte) 0x69,
(byte) 0x6d, (byte) 0x65, (byte) 0x22, (byte) 0x2c,
(byte) 0x22, (byte) 0x74, (byte) 0x79, (byte) 0x70,
(byte) 0x65, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x6c, (byte) 0x6f, (byte) 0x6e, (byte) 0x67,
(byte) 0x22, (byte) 0x7d, (byte) 0x2c, (byte) 0x7b,
(byte) 0x22, (byte) 0x6e, (byte) 0x61, (byte) 0x6d,
(byte) 0x65, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x74, (byte) 0x65, (byte) 0x6d, (byte) 0x70,
(byte) 0x22, (byte) 0x2c, (byte) 0x22, (byte) 0x74,
(byte) 0x79, (byte) 0x70, (byte) 0x65, (byte) 0x22,
(byte) 0x3a, (byte) 0x22, (byte) 0x69, (byte) 0x6e,
(byte) 0x74, (byte) 0x22, (byte) 0x7d, (byte) 0x5d,
(byte) 0x2c, (byte) 0x22, (byte) 0x64, (byte) 0x6f,
(byte) 0x63, (byte) 0x22, (byte) 0x3a, (byte) 0x22,
(byte) 0x41, (byte) 0x20, (byte) 0x77, (byte) 0x65,
(byte) 0x61, (byte) 0x74, (byte) 0x68, (byte) 0x65,
(byte) 0x72, (byte) 0x20, (byte) 0x72, (byte) 0x65,
(byte) 0x61, (byte) 0x64, (byte) 0x69, (byte) 0x6e,
(byte) 0x67, (byte) 0x2e, (byte) 0x22, (byte) 0x7d,
(byte) 0x0, (byte) 0xb0, (byte) 0x81, (byte) 0xb3,
(byte) 0xc4, (byte) 0xa, (byte) 0xc, (byte) 0xf6,
(byte) 0x62, (byte) 0xfa, (byte) 0xc9, (byte) 0x38,
(byte) 0xfd, (byte) 0x7e, (byte) 0x52, (byte) 0x0,
(byte) 0xa7, (byte) 0xa, (byte) 0xcc, (byte) 0x1,
(byte) 0x18, (byte) 0x30, (byte) 0x31, (byte) 0x31,
(byte) 0x39, (byte) 0x39, (byte) 0x30, (byte) 0x2d,
(byte) 0x39, (byte) 0x39, (byte) 0x39, (byte) 0x39,
(byte) 0x39, (byte) 0xff, (byte) 0xa3, (byte) 0x90,
(byte) 0xe8, (byte) 0x87, (byte) 0x24, (byte) 0x0,
(byte) 0x18, (byte) 0x30, (byte) 0x31, (byte) 0x31,
(byte) 0x39, (byte) 0x39, (byte) 0x30, (byte) 0x2d,
(byte) 0x39, (byte) 0x39, (byte) 0x39, (byte) 0x39,
(byte) 0x39, (byte) 0xff, (byte) 0x81, (byte) 0xfb,
(byte) 0xd6, (byte) 0x87, (byte) 0x24, (byte) 0x2c,
(byte) 0x18, (byte) 0x30, (byte) 0x31, (byte) 0x31,
(byte) 0x39, (byte) 0x39, (byte) 0x30, (byte) 0x2d,
(byte) 0x39, (byte) 0x39, (byte) 0x39, (byte) 0x39,
(byte) 0x39, (byte) 0xff, (byte) 0xa5, (byte) 0xae,
(byte) 0xc2, (byte) 0x87, (byte) 0x24, (byte) 0x15,
(byte) 0x18, (byte) 0x30, (byte) 0x31, (byte) 0x32,
(byte) 0x36, (byte) 0x35, (byte) 0x30, (byte) 0x2d,
(byte) 0x39, (byte) 0x39, (byte) 0x39, (byte) 0x39,
(byte) 0x39, (byte) 0xff, (byte) 0xb7, (byte) 0xa2,
(byte) 0x8b, (byte) 0x94, (byte) 0x26, (byte) 0xde,
(byte) 0x1, (byte) 0x18, (byte) 0x30, (byte) 0x31,
(byte) 0x32, (byte) 0x36, (byte) 0x35, (byte) 0x30,
(byte) 0x2d, (byte) 0x39, (byte) 0x39, (byte) 0x39,
(byte) 0x39, (byte) 0x39, (byte) 0xff, (byte) 0xdb,
(byte) 0xd5, (byte) 0xf6, (byte) 0x93, (byte) 0x26,
(byte) 0x9c, (byte) 0x1, (byte) 0xb0, (byte) 0x81,
(byte) 0xb3, (byte) 0xc4, (byte) 0xa, (byte) 0xc,
(byte) 0xf6, (byte) 0x62, (byte) 0xfa, (byte) 0xc9,
(byte) 0x38, (byte) 0xfd, (byte) 0x7e, (byte) 0x52,
(byte) 0x0, (byte) 0xa7,
};
return contents;
}
}