Easy Batch
The simple, stupid batch framework for Java™

Project status

As of November 18, 2020, Easy Batch is in maintenance mode. This means only bug fixes will be addressed from now on. Version 7.0.x is the only supported version.

Latest news

24/09/2020: Version 7.0.0 is out with several enhancements towards type safe APIs. See the change log here.

What is Easy Batch?

Easy Batch is a framework that aims to simplify batch processing with Java. It was specifically designed for simple ETL jobs. Writing batch applications requires a lot of boilerplate code: reading, writing, filtering, parsing and validating data, logging, reporting to name a few.. The idea is to free you from these tedious tasks and let you focus on your batch application's logic.

How does it work?

Easy Batch jobs are simple processing pipelines. Records are read in sequence from a data source, processed in pipeline and written in batches to a data sink:

The framework provides the Record and Batch APIs to abstract data format and process records in a consistent way regardless of the data source type.

Let's see a quick example. Suppose you have the following tweets.csv file:

id,user,message
1,foo,hello
2,bar,@foo hi!

and you want to transform these tweets to XML format. Here is how you can do that with Easy Batch:

Path inputFile = Paths.get("tweets.csv");
Path outputFile = Paths.get("tweets.xml");
Job job = new JobBuilder<String, String>()
         .reader(new FlatFileRecordReader(inputFile))
         .filter(new HeaderRecordFilter<>())
         .mapper(new DelimitedRecordMapper<>(Tweet.class, "id", "user", "message"))
         .marshaller(new XmlRecordMarshaller<>(Tweet.class))
         .writer(new FileRecordWriter(outputFile))
         .batchSize(10)
         .build();

JobExecutor jobExecutor = new JobExecutor();
JobReport report = jobExecutor.execute(job);
jobExecutor.shutdown();

This example creates a job that:

reads records one by one from the input file tweets.csv
filters the header record
maps each record to an instance of the Tweet bean
marshals the tweet to XML format
and finally writes XML records in batches of 10 to the output file tweets.xml

At the end of execution, you get a report with statistics and metrics about the job run (Execution time, number of errors, etc). All the boilerplate code of resources I/O, iterating through the data source, filtering and parsing records, mapping data to the domain object Tweet, writing output and reporting is handled by Easy Batch. Your code becomes declarative, intuitive, easy to read, understand, test and maintain.

Quick start

Add the following dependency to your project and you are ready to go:

<dependency>
    <groupId>org.jeasy</groupId>
    <artifactId>easy-batch-core</artifactId>
    <version>7.0.0</version>
</dependency>

You can also generate a quick start project with the following command:

$>mvn archetype:generate \
      -DarchetypeGroupId=org.jeasy \
      -DarchetypeArtifactId=easy-batch-archetype \
      -DarchetypeVersion=7.0.0

For more details, please check the Getting started guide.

Presentations, articles & blog posts

Current versions

Stable:

The current stable version is v7.0.0 | documentation | tutorials | javadoc

Development:

The current development version is 7.0.1-SNAPSHOT:

If you want to import a snapshot version, please check the Getting started guide.

Contribution

You are welcome to contribute to the project with pull requests on GitHub. Please note that Easy Batch is in maintenance mode, which means only pull requests for bug fixes will be considered.

If you believe you found a bug or have any question, please use the issue tracker.

Awesome contributors

Thank you all for your contributions!

Who is using Easy Batch?

Easy Batch has been successfully used in production in a number of companies which I (@benas) am not allowed to mention. That said, there are some companies which publicly mention that they use Easy Batch:

You can also find some feedback from the community about the project in the Testimonials section.

Credits

Many thanks to YourKit, LLC for providing a free license of YourKit Java Profiler to support the development of Easy Batch.

License

Easy Batch is released under the terms of the .

The MIT License (MIT)

Copyright (c) 2020 Mahmoud Ben Hassine (mahmoud.benhassine@icloud.com)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

sunsofterp/easy-batch