The simple, stupid batch framework for Java
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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.
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
BatchAPIs 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
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() .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:
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:
org.jeasy easy-batch-core 7.0.0
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.
If you want to import a snapshot version, please check the Getting started guide.
You are welcome to contribute to the project with pull requests on GitHub.
If you find a bug or want to request a feature, please use the issue tracker.
For any further question, you can use the gitter channel of the project.
Thank you all for your contributions!
Easy Batch has been successfully used in production in a number of companies which I (@benas) am not allowed to mention. That said, here are some companies who publicly mention that they use Easy Batch:
You can also find some feedback from the community about the project in the Testimonials section.
The MIT License (MIT)
Copyright (c) 2020 Mahmoud Ben Hassine ([email protected])
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.
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