client-hello-world

A2A4J Client Hello World Sample

This is a sample A2A (Agent2Agent) protocol client implementation demonstrating how to use the A2A4J framework to interact with an A2A server.

Features

• ✅ A2A protocol client implementation
• ✅ JSON-RPC 2.0 synchronous and streaming communication
• ✅ Example of sending messages to an A2A server
• ✅ Real-time status updates and progress tracking
• ✅ Detailed logging

Quick Start

Before running the client, please make sure the server-hello-world module is started and running on http://localhost:8089.

Prerequisites

• Java 17 or higher
• Maven 3.6 or higher

Build Project

# Clone repository (if you haven't already)
git clone https://github.com/a2ap/a2a4j.git
cd a2a4j

# Build entire project
mvn clean install

# Navigate to sample directory
cd a2a4j-samples/client-hello-world

Run Client

# Run with Maven
mvn spring-boot:run

# Or run compiled JAR
mvn clean package
java -jar target/client-hello-world-*.jar

Example Usage

The client will attempt to connect to the A2A server (default: http://localhost:8089) and send a sample message. You can modify the message and server URL in the configuration file.

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For more details, see the source code and comments.