Java Code Examples

This guide demonstrates how to use the Spark API with Java. The example project shows you how to authenticate and fetch data from the API using standard Java libraries.

Requirements

• Java 8 or higher
• Maven (for dependency management and building)

Getting Started

1. Download the Sample Project

Get the complete sample project: Java API Sample

This project demonstrates how to:

• Authenticate with the Spark API using OAuth2
• Make authenticated requests to API endpoints
• Parse and handle JSON responses

Dependencies used:

• Apache HttpClient - For HTTP communication
• Gson - For JSON parsing

2. Configure Your Credentials

Set your API credentials as environment variables:

export SPARK_CLIENT_ID=your_client_id_here
export SPARK_CLIENT_SECRET=your_client_secret_here

Alternative Configuration

You can also modify the sample code to load credentials from a configuration file or other sources.

3. Run the Application

You have two options to run the sample:

Option A: Run from Your IDE

Open the project in your favorite Java IDE (IntelliJ IDEA, Eclipse, VS Code) and run the main method in SparkAPISampleApp.java

Option B: Run with Maven

mvn compile exec:java -Dexec.mainClass="com.sparkcommodities.api.SparkAPISampleApp"

Building the Project

To build the project and download dependencies:

mvn clean install

This will:

• Download all required dependencies
• Compile the source code
• Run any tests (if present)
• Package the application

Troubleshooting

Build errors?

• Ensure Java 8 or higher is installed: java -version
• Verify Maven is installed: mvn -version
• Check that pom.xml is present in the project root

Authentication errors?

• Verify your environment variables are set correctly
• Ensure your credentials haven't expired
• Check that your subscription has API access

Dependency issues?

• Run mvn clean install to refresh dependencies
• Check your internet connection (Maven needs to download dependencies)

Need help? Contact us at support@sparkcommodities.com