https://github.com/cfg4j/cfg4j

Modern configuration library for distributed apps written in Java.
https://github.com/cfg4j/cfg4j

Last synced: 12 days ago
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Modern configuration library for distributed apps written in Java.

• Host: GitHub
• URL: https://github.com/cfg4j/cfg4j
• Owner: cfg4j
• License: apache-2.0
• Created: 2015-05-20T01:14:19.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2022-07-14T13:19:32.000Z (over 2 years ago)
• Last Synced: 2024-08-01T18:24:28.798Z (3 months ago)
• Language: Java
• Homepage: http://cfg4j.org
• Size: 979 KB
• Stars: 555
• Watchers: 26
• Forks: 116
• Open Issues: 95
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-java - cfg4j - Modern configuration library for distributed apps written in Java. (Projects / Configuration)

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](https://github.com/cfg4j/cfg4j-sample-apps/tree/master/consul-bind),

 [Git repos (YAML and/or properties)](https://github.com/cfg4j/cfg4j-sample-apps/tree/master/git-bind),

 [Files](https://github.com/cfg4j/cfg4j-sample-apps/tree/master/files-bind),

 [Classpath](https://github.com/cfg4j/cfg4j-sample-apps/tree/master/classpath-bind), ...**

* Modern design

  * Seamless integration with DI containers: **[Spring](https://spring.io/)**, **[Guice](https://github.com/google/guice)** and others

  * Exposes performance metrics by integration with **[Metrics library](http://metrics.dropwizard.io)**

  * Extensible (see the list of **plugins** below)

  * Heavily tested (**99% code coverage**)

  * Well [documented](http://cfg4j.org)

  * Java 8+ required

# Usage

Read [an article about configuration management using cfg4j](http://potocki.io/post/141230472743/configuration-management-for-distributed-systems).

## Detailed documentation

Head to [the documentation](http://cfg4j.org).

## Sample apps

Explore the code of the [sample apps](https://github.com/cfg4j/cfg4j-sample-apps).

## Quick start

### Setting up dependency

#### Gradle

```groovy

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

```xml

  

    org.cfg4j

    cfg4j-core

    4.4.1

  

  

   

    org.cfg4j

    cfg4j-consul

    4.4.1

  

  

  

    org.cfg4j

    cfg4j-git

    4.4.1

  

```

### 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.