Minimal Java console app using Dev Proxy

Summary

This sample demonstrates the minimal setup to use Dev Proxy with a Java console application. It shows how to:

• Configure Dev Proxy to intercept API requests
• Mock API responses using the MockResponsePlugin
• Configure java.net.http.HttpClient to use the Dev Proxy
• Bypass SSL certificate validation for local proxy usage

The sample makes a single API call to JSONPlaceholder and returns a mocked response, demonstrating how Dev Proxy intercepts and replaces the real API call.

Compatibility

Contributors

• Waldek Mastykarz

Version history

Prerequisites

• Dev Proxy
• Java 21 JDK
• Apache Maven

Minimal path to awesome

• Get the sample:

  • Download just this sample:

    npx gitload-cli https://github.com/pnp/proxy-samples/tree/main/samples/minimal-java-console

    or

  • Download as a .ZIP file and unzip it, or

  • Clone this repository

• Navigate to the sample folder: cd samples/minimal-java-console
• In one terminal, start Dev Proxy: devproxy
• In another terminal, compile and run the app: mvn compile exec:java
• Observe the mocked API response in the console with headers x-powered-by: Dev Proxy and x-mocked-by: Dev Proxy MockResponsePlugin

Features

This sample illustrates the following concepts:

• Configuring Dev Proxy with a .devproxy/devproxyrc.json file
• Using MockResponsePlugin to return custom API responses
• Configuring java.net.http.HttpClient to route requests through Dev Proxy
• Bypassing SSL certificate validation for local development
• Adding custom headers to mocked responses

Help

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Disclaimer

THIS CODE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.