rabbitmq-to-azureservicebus

name	rabbitmq-to-azureservicebus
description	Migrate from RabbitMQ to Azure Service Bus for messaging.

RabbitMQ to Azure Service Bus Migration Instructions

Overview

This document provides comprehensive instructions for migrating from RabbitMQ to Azure Service Bus.

Maven Project

copy file awesomeasb-1.0.0.jar to classpath.

Add to your pom.xml:

<dependencies>
    <dependency>
        <groupId>com.awsomeasb</groupId>
        <artifactId>awesomeasb</artifactId>
        <version>1.0.0</version>
    </dependency>
    
    <!-- Choose your SLF4J implementation -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>2.0.9</version>
    </dependency>
</dependencies>

Gradle Project

Add to your build.gradle:

dependencies {
    implementation 'com.awsomeasb:awesomeasb:1.0.0'
    implementation 'org.slf4j:slf4j-simple:2.0.9'
}

3. Example Usage in Your App

import com.awsomeasb.AwsomeMQClient;
import com.awsomeasb.DeliverCallback;

public class MyApplication {
    public static void main(String[] args) {
        String connectionString = System.getenv("AZURE_SERVICEBUS_CONNECTION_STRING");
        String queueName = "myqueue";
        
        try (AwsomeMQClient client = new AwsomeMQClient(connectionString, queueName)) {
            
            // Publish a message
            client.basicPublish(queueName, "Hello World!".getBytes());
            
            // Consume messages
            DeliverCallback callback = (tag, delivery) -> {
                System.out.println("Received: " + delivery.getBodyAsString());
            };
            
            String consumerTag = client.basicConsume(queueName, true, callback);
            Thread.sleep(10000);
            client.basicCancel(consumerTag);
        }
    }
}

Using Managed Identity

import com.awsomeasb.AwsomeMQClient;

// Uses DefaultAzureCredential (Azure CLI, Managed Identity, etc.)
try (AwsomeMQClient client = new AwsomeMQClient(
        "myservicebus.servicebus.windows.net",
        "myqueue", 
        null)) {
    
    client.basicPublish("myqueue", "Secure message".getBytes());
}

API Reference

Main Classes

• AwsomeMQClient - Main client for publishing and consuming messages
• DeliverCallback - Callback interface for message delivery
• CancelCallback - Callback interface for consumer cancellation
• Delivery - Wrapper for received messages

Core Methods

// Publishing
void basicPublish(String routingKey, byte[] body)
void basicPublish(String routingKey, Map<String, Object> properties, byte[] body)

// Consuming
String basicConsume(String queueName, boolean autoAck, DeliverCallback callback)
String basicConsume(String queueName, boolean autoAck, DeliverCallback callback, CancelCallback cancelCallback)

// Consumer management
void basicCancel(String consumerTag)

// Message acknowledgment
void basicAck(Delivery delivery)
void basicNack(Delivery delivery, boolean requeue)

Troubleshooting

Issue: SLF4J warnings

Solution: Add an SLF4J implementation to your project (slf4j-simple, logback, log4j2, etc.)

Issue: Authentication failures with Managed Identity

Solution: 
- Run 'az login' for local development
- Grant Azure Service Bus Data Sender/Receiver roles
- Verify namespace URL format: 'namespace.servicebus.windows.net'