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Programming language: Java
Tags: Configuration    
Latest version: v4.4.1

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README

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Overview

cfg4j ("configuration for Java") is a configuration library for Java distributed apps (and more).

Features:

  • Open source
  • Easy to use
  • Auto-reloads configuration
  • Powerful configuration mechanisms (interface binding, multi-source support with fallback strategy, merging, ...)
  • Distributed-environment friendly ( caching, support for multiple environments [test, preprod, prod], ...)
  • Reads configuration from: Consul, Git repos (YAML and/or properties), Files, Classpath, ...
  • Modern design
    • Seamless integration with DI containers: Spring, Guice and others
    • Exposes performance metrics by integration with Metrics library
    • Extensible (see the list of plugins below)
    • Heavily tested (99% code coverage)
    • Well documented
    • Java 8+ required

Usage

Read an article about configuration management using cfg4j.

Detailed documentation

Head to the documentation.

Sample apps

Explore the code of the sample apps.

Quick start

Setting up dependency

Gradle

dependencies {
  compile group: "org.cfg4j", name:"cfg4j-core", version: "4.4.1"

  // For Consul integration
  compile group: "org.cfg4j", name:"cfg4j-consul", version: "4.4.1"

  // For git integration
  compile group: "org.cfg4j", name:"cfg4j-git", version: "4.4.1"
}

Maven

<dependencies>
  <dependency>
    <groupId>org.cfg4j</groupId>
    <artifactId>cfg4j-core</artifactId>
    <version>4.4.1</version>
  </dependency>
  <!-- For Consul integration -->
  <dependency> 
    <groupId>org.cfg4j</groupId>
    <artifactId>cfg4j-consul</artifactId>
    <version>4.4.1</version>
  </dependency>
  <!-- For git integration -->
  <dependency>
    <groupId>org.cfg4j</groupId>
    <artifactId>cfg4j-git</artifactId>
    <version>4.4.1</version>
  </dependency>
</dependencies>

Usage

The fastest way to start working with cfg4j is to use a Git repository as a configuration store. To do that follow the steps:

  • Use the following code in your application to connect to sample configuration source: ```java public class Cfg4jPoweredApplication {

// Change this interface to whatever you want public interface SampleConfig { Integer birthYear(); List friends(); URL homepage(); Map grades(); }

public static void main(String... args) { ConfigurationSource source = new GitConfigurationSourceBuilder() .withRepositoryURI("https://github.com/cfg4j/cfg4j-git-sample-config.git") .build();

ConfigurationProvider provider = new ConfigurationProviderBuilder()
  .withConfigurationSource(source)
  .build();

SampleConfig config = configurationProvider.bind("reksio", SampleConfig.class);

// Use it!
System.out.println(config.homepage());

}

}


* Optional steps
    1. Fork the [configuration sample repository](https://github.com/cfg4j/cfg4j-git-sample-config).
    2. Add your configuration to the "*application.properties*" file and commit the changes.
    3. Update the code above to point to your fork.

# License
Licensed under the Apache License, Version 2.0. See LICENSE file.


*Note that all licence references and agreements mentioned in the cfg4j README section above are relevant to that project's source code only.