https://github.com/levlaz/ld-demo-java

Java Sandbox for LaunchDarkly
https://github.com/levlaz/ld-demo-java

Last synced: 3 months ago
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Java Sandbox for LaunchDarkly

• Host: GitHub
• URL: https://github.com/levlaz/ld-demo-java
• Owner: levlaz
• License: mit
• Created: 2018-08-07T22:19:39.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2020-11-20T04:19:57.000Z (over 3 years ago)
• Last Synced: 2024-01-21T22:52:12.438Z (5 months ago)
• Language: Java
• Size: 8.79 KB
• Stars: 0
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-launchdarkly - levlaz/ld-demo-java - Java Sandbox (Apps)

README

        
# ld-demo-java

Java Sandbox for LaunchDarkly 

## FeatureProvider

The FeatureProvider class implements the LaunchDarkly client as a singleton. It uses the approach documented here: https://dzone.com/articles/java-singletons-using-enum 

There is some fancy stuff in here for logging and checking that the environment variable 

for the LD_SDK_KEY exists. The most basic implementation of this could look like this: 

```

package org.levlaz;

import com.launchdarkly.client.LDClient;

/**

 * Singleton Enum

 */

public enum FeatureProvider {

    INSTANCE;

    private LDClient ldClient = new LDClient(System.getenv("LD_SDK_KEY"));

    

    public LDClient getInstance() {

        checkEnv();

        return ldClient;

    }

}

```

## Usage 

You can run this without LauncDarkly, but feature flags will fall back to the hard coded fallback 

value. If you want to use LaunchDarkly you need the following: 

1. A valid `LD_SDK_KEY` exported as an environment variable. 

2. A feature flag called `show-message` that exists in the same environment that your `LD_SDK_KEY` maps to. 

We use a Makefile to make it easier to build and run this project. 

### Building 

You can run `make build` to build this project for the first time. 

### Running 

You can run `make run` to run the project.