/**
* 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.avro.tool;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.avro.AvroTestUtil;
import org.apache.avro.Schema;
import org.apache.avro.Schema.Type;
import org.apache.avro.file.CodecFactory;
import org.apache.avro.file.DataFileConstants;
import org.apache.avro.file.DataFileStream;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.generic.GenericRecord;
import org.junit.Test;
public class TestConcatTool {
private static final int ROWS_IN_INPUT_FILES = 100000;
private static final CodecFactory DEFLATE = CodecFactory.deflateCodec(9);
private Object aDatum(Type ofType, int forRow) {
switch (ofType) {
case STRING:
return String.valueOf(forRow % 100);
case INT:
return forRow;
default:
throw new AssertionError("I can't generate data for this type");
}
}
private File generateData(String file, Type type, Map<String, String> metadata, CodecFactory codec) throws Exception {
File inputFile = AvroTestUtil.tempFile(getClass(), file);
inputFile.deleteOnExit();
Schema schema = Schema.create(type);
DataFileWriter<Object> writer = new DataFileWriter<Object>(
new GenericDatumWriter<Object>(schema));
for(Entry<String, String> metadatum : metadata.entrySet()) {
writer.setMeta(metadatum.getKey(), metadatum.getValue());
}
writer.setCodec(codec);
writer.create(schema, inputFile);
for (int i = 0; i < ROWS_IN_INPUT_FILES; i++) {
writer.append(aDatum(type, i));
}
writer.close();
return inputFile;
}
private CodecFactory getCodec(File output) throws Exception {
DataFileStream<GenericRecord> reader = new DataFileStream<GenericRecord>(
new FileInputStream(output),
new GenericDatumReader<GenericRecord>());
String codec = reader.getMetaString(DataFileConstants.CODEC);
try {
return codec == null ? CodecFactory.nullCodec() : CodecFactory.fromString(codec);
}finally{
reader.close();
}
}
private int numRowsInFile(File output) throws Exception {
DataFileStream<GenericRecord> reader = new DataFileStream<GenericRecord>(
new FileInputStream(output),
new GenericDatumReader<GenericRecord>());
Iterator<GenericRecord> rows = reader.iterator();
int rowcount = 0;
while(rows.hasNext()) {
++rowcount;
rows.next();
}
reader.close();
return rowcount;
}
@Test
public void testDirConcat() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
File dir = AvroTestUtil.tempDirectory(getClass(), "input");
for (int i = 0; i < 3; i++) {
String filename = "input" + i + ".avro";
File input = generateData(filename, Type.STRING, metadata, DEFLATE);
boolean ok = input.renameTo(new File(dir, input.getName()));
assertTrue(ok);
}
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
dir.getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(0, returnCode);
assertEquals(ROWS_IN_INPUT_FILES * 3, numRowsInFile(output));
}
@Test
public void testGlobPatternConcat() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
File dir = AvroTestUtil.tempDirectory(getClass(), "input");
for (int i = 0; i < 3; i++) {
String filename = "input" + i + ".avro";
File input = generateData(filename, Type.STRING, metadata, DEFLATE);
boolean ok = input.renameTo(new File(dir, input.getName()));
assertTrue(ok);
}
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
new File(dir, "/*").getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(0, returnCode);
assertEquals(ROWS_IN_INPUT_FILES * 3, numRowsInFile(output));
}
@Test(expected = FileNotFoundException.class)
public void testFileDoesNotExist() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
File dir = AvroTestUtil.tempDirectory(getClass(), "input");
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
new File(dir, "/doNotExist").getAbsolutePath(),
output.getAbsolutePath());
new ConcatTool().run(
System.in,
System.out,
System.err,
args);
}
@Test
public void testConcat() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("myMetaKey", "myMetaValue");
File input1 = generateData("input1.avro", Type.STRING, metadata, DEFLATE);
File input2 = generateData("input2.avro", Type.STRING, metadata, DEFLATE);
File input3 = generateData("input3.avro", Type.STRING, metadata, DEFLATE);
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
input1.getAbsolutePath(),
input2.getAbsolutePath(),
input3.getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(0, returnCode);
assertEquals(ROWS_IN_INPUT_FILES * 3, numRowsInFile(output));
assertEquals(getCodec(input1).getClass(), getCodec(output).getClass());
}
@Test
public void testDifferentSchemasFail() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("myMetaKey", "myMetaValue");
File input1 = generateData("input1.avro", Type.STRING, metadata, DEFLATE);
File input2 = generateData("input2.avro", Type.INT, metadata, DEFLATE);
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
input1.getAbsolutePath(),
input2.getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(1, returnCode);
}
@Test
public void testDifferentMetadataFail() throws Exception {
Map<String, String> metadata1 = new HashMap<String, String>();
metadata1.put("myMetaKey", "myMetaValue");
Map<String, String> metadata2 = new HashMap<String, String>();
metadata2.put("myOtherMetaKey", "myOtherMetaValue");
File input1 = generateData("input1.avro", Type.STRING, metadata1, DEFLATE);
File input2 = generateData("input2.avro", Type.STRING, metadata2, DEFLATE);
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
input1.getAbsolutePath(),
input2.getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(2, returnCode);
}
@Test
public void testDifferentCodecFail() throws Exception {
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("myMetaKey", "myMetaValue");
File input1 = generateData("input1.avro", Type.STRING, metadata, DEFLATE);
File input2 = generateData("input2.avro", Type.STRING, metadata, CodecFactory.nullCodec());
File output = AvroTestUtil.tempFile(getClass(), "default-output.avro");
output.deleteOnExit();
List<String> args = asList(
input1.getAbsolutePath(),
input2.getAbsolutePath(),
output.getAbsolutePath());
int returnCode = new ConcatTool().run(
System.in,
System.out,
System.err,
args);
assertEquals(3, returnCode);
}
@Test
public void testHelpfulMessageWhenNoArgsGiven() throws Exception {
ByteArrayOutputStream buffer = new ByteArrayOutputStream(1024);
PrintStream out = new PrintStream(buffer);
int returnCode = new ConcatTool().run(
System.in,
out,
System.err,
Collections.<String>emptyList());
out.close(); // flushes too
assertEquals(0, returnCode);
assertTrue(
"should have lots of help",
buffer.toString().trim().length() > 200);
}
}