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AvroTestUtils.java
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/
AvroTestUtils.java
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/*
* Copyright 2019 the original author or authors.
*
* 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
*
* https://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.springframework.batch.item.avro.example;
import java.io.File;
import java.io.FileOutputStream;
import org.apache.avro.Schema;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.io.Encoder;
import org.apache.avro.io.EncoderFactory;
import org.apache.avro.specific.SpecificDatumWriter;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
/**
* Used to create test data. See http://avro.apache.org/docs/1.9.0/gettingstartedjava.html
*
* @author David Turanski
* @author Mahmoud Ben Hassine
*/
class AvroTestUtils {
public static void main(String... args) {
try {
createTestDataWithNoEmbeddedSchema();
createTestData();
} catch (Exception e) {
e.printStackTrace();
}
}
static void createTestDataWithNoEmbeddedSchema() throws Exception {
DatumWriter<User> userDatumWriter = new SpecificDatumWriter<>(User.class);
FileOutputStream fileOutputStream = new FileOutputStream("user-data-no-schema.avro");
Encoder encoder = EncoderFactory.get().binaryEncoder(fileOutputStream,null);
userDatumWriter.write(new User("David", 20, "blue"), encoder);
userDatumWriter.write(new User("Sue", 4, "red"), encoder);
userDatumWriter.write(new User("Alana", 13, "yellow"), encoder);
userDatumWriter.write(new User("Joe", 1, "pink"), encoder);
encoder.flush();
fileOutputStream.flush();
fileOutputStream.close();
}
static void createTestData() throws Exception {
Resource schemaResource = new ClassPathResource("org/springframework/batch/item/avro/user-schema.json");
DatumWriter<User> userDatumWriter = new SpecificDatumWriter<>(User.class);
DataFileWriter<User> dataFileWriter = new DataFileWriter<>(userDatumWriter);
dataFileWriter.create(new Schema.Parser().parse(schemaResource.getInputStream()), new File("users.avro"));
dataFileWriter.append(new User("David", 20, "blue"));
dataFileWriter.append(new User("Sue", 4, "red"));
dataFileWriter.append(new User("Alana", 13, "yellow"));
dataFileWriter.append(new User("Joe", 1, "pink"));
dataFileWriter.close();
}
}