Rebus .NET Core Example (How It Works For Developers)

In the intricate world of .NET development, managing asynchronous communication between services is a critical aspect of building robust and scalable applications. Enter Rebus .NET, a powerful library that simplifies message-based communication and routing within the .NET ecosystem. Let's explore how Rebus empowers developers to harness the full potential of service buses and queueing service call mechanisms, using the keywords provided.

Developers may build complex distributed systems with the ability to generate PDF documents as part of their messaging operations by combining Rebus .NET with IronPDF. For instance, a Rebus-built system might get a request to produce a PDF document, handle it with Rebus handlers, and then use IronPDF to produce the document and reply to it.

Developers may create feature-rich, scalable, and dependable distributed apps with Rebus and IronPDF that can be easily integrated into messaging workflows for PDF generation. A strong basis for developing a variety of applications, such as reporting tools and document management systems, is provided by this integration.

What is Rebus?

At the heart of distributed systems lies the need for efficient message routing and handling. Rebus, with its intuitive API and comprehensive features, serves as a bridge between different components of a distributed application. Whether it's orchestrating communication between microservices or managing asynchronous tasks, Rebus provides the necessary tools to streamline message processing and delivery.

Service Bus and Message Routing

With Rebus, routing messages based on predefined criteria becomes a breeze. Developers can leverage Rebus' routing capabilities to direct messages to specific handlers or queues, ensuring that each message reaches its intended destination efficiently. By defining routing rules using Rebus' extension methods, developers can customize message flows according to the unique requirements of their application architecture.

Versatile Messaging Patterns

Rebus .NET is compatible with a number of messaging patterns, such as message routing, command/query, request/response, and publish/subscribe. Because of this versatility, developers can select the design that best fits their particular use case.

Asynchronous Messaging

Rebus.NET makes it possible for components of a distributed system to communicate with one another without having to wait for a response or block one another. The responsiveness and scalability of the system are enhanced by this asynchronous communication.

Distributed Architecture

Rebus.NET is intended for the development of distributed systems, in which several processes or networks are used as a means of communication between components. It offers capabilities for handling message serialization and deserialization, maintaining message delivery dependability, and managing message queues.

Extensibility

Rebus.NET is very extendable, enabling programmers to alter and expand its features to suit their needs. It offers integration points with multiple middleware platforms, serialization formats, and message brokers.

Error Handling and Retry Techniques

Rebus.NET has built-in retry and error handling techniques that make sure messages are processed consistently even when there are brief outages or problems with the network. Retry policies and error-handling techniques can be set by developers to satisfy the resilience needs of their applications.

Message Encryption and Security

Rebus.NET enables developers to safeguard sensitive data that is transferred across dispersed components, hosting environments, and hybrid cloud applications by providing message encryption and security features. It guarantees safe communication channels for hybrid cloud applications by integrating with encryption libraries and protocols with ease.

Asynchronous Message Handling

Handling asynchronous message processing is a core feature of Rebus. By using the await bus pattern, developers can have application code to await the arrival of messages and execute corresponding message handlers asynchronously. This allows for non-blocking message processing, ensuring that the application remains responsive and scalable even under heavy loads.

Fault Tolerance and Failed Message Management

In distributed systems, failures are inevitable. Rebus equips developers with mechanisms to manage and process failed messages gracefully. By configuring error logging and retry policies, developers can define how Rebus handles failed messages, whether it's retrying delivery of error messages, moving messages to a dead-letter queue, or logging errors for further logging and analysis.

Create and Configure Rebus

Integration with .NET Core

Rebus is fully compatible with .NET Core, making it an ideal choice for modern, cross-platform applications. Whether you're building microservices, serverless functions, hybrid cloud applications or-native applications, Rebus provides a solid foundation for asynchronous communication and message handling in the .NET Core ecosystem.

Configure Message Handlers

Message handler class classes must then be the class created in order to process incoming messages. The IHandleMessages interface, where MyMessage is the type of message the handler class will process, should be implemented by every message handler class.

public class MyMessageHandler : IHandleMessages<MyMessage>
{
    public async Task Handle(MyMessage message)
    {
        // Process the incoming message here
    }
}

public class MyMessageHandler : IHandleMessages<MyMessage>
{
    public async Task Handle(MyMessage message)
    {
        // Process the incoming message here
    }
}

Public Class MyMessageHandler
	Implements IHandleMessages(Of MyMessage)

	Public Async Function Handle(ByVal message As MyMessage) As Task
		' Process the incoming message here
	End Function
End Class

Configure Message Transport

To transmit messages and receive messages, Rebus must also be configured with a message transport mechanism. Rebus is compatible with multiple transport alternatives, such as in-memory transport for testing, Azure Service Bus, RabbitMQ, and SQL Server. By using this it is not only tied to any specific queueing technology. It can be moved to any hosting environment.

To utilize RabbitMQ as the message transport, for instance:

var services = new ServiceCollection();
//service bus
services.AddRebus(configure => configure
    .Transport(t => t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue"))
    .Routing(r => r.TypeBased().Map<MyMessage>("my-queue")));

var services = new ServiceCollection();
//service bus
services.AddRebus(configure => configure
    .Transport(t => t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue"))
    .Routing(r => r.TypeBased().Map<MyMessage>("my-queue")));

Dim services = New ServiceCollection()
'service bus
services.AddRebus(Function(configure) configure.Transport(Function(t) t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue")).Routing(Function(r) r.TypeBased().Map(Of MyMessage)("my-queue")))

Initialize Rebus

Lastly, you must begin the message processing loop process and initialize Rebus with the configured services.

var serviceProvider = services.BuildServiceProvider();
var bus = serviceProvider.GetRequiredService<IBus>();
await bus.Start();

var serviceProvider = services.BuildServiceProvider();
var bus = serviceProvider.GetRequiredService<IBus>();
await bus.Start();

Dim serviceProvider = services.BuildServiceProvider()
Dim bus = serviceProvider.GetRequiredService(Of IBus)()
Await bus.Start()

Additional Configuration

Retry Strategies: By including retry options in the configuration, you can set Rebus up to retry message processing in the event of a failure.

Concurrency Control: By adjusting the number of worker threads or handlers, Rebus gives you the ability to regulate the concurrency of message processing.

Message Serialization: Rebus is capable of serializing messages in a variety of formats, including JSON, XML, and Protobuf. The serialization settings are configurable to suit your application code and needs.

Getting Started

What is IronPDF?

A popular .NET library that lets us create, modify, and render PDF documents inside of programs is called IronPDF. Working with PDFs can be done in a number of ways, including converting HTML pages to PDFs and inserting text, images, and shapes into ones that already exist. Even better, you can create new PDF documents using HTML text application code, images, or unprocessed data.

The ease of use of IronPDF is among its main advantages. Because of its user-friendly API and extensive documentation, developers may quickly begin creating PDFs from within their .NET apps. IronPDF's efficiency and speed are two more features that help developers create high-quality PDF documents quickly.

Advantages of IronPDF

A few advantages of IronPDF

• Creating PDFs from HTML, pictures, and unprocessed data.
• Remove text and images from PDF files.
• Add watermarks, headers, and footers to PDF files.
• Passwords and encryption are used to secure PDF files.
• The capability to electronically complete and sign paperwork.

Install Libraries

You must first set up Rebus for messaging and IronPDF for PDF production in order to use them in a .NET application. Here's a detailed how-to:

Install-Package Rebus
Install-Package Rebus.ServiceProvider
Install-Package IronPdf

Install-Package Rebus
Install-Package Rebus.ServiceProvider
Install-Package IronPdf

'INSTANT VB TODO TASK: The following line uses invalid syntax:
'Install-Package Rebus Install-Package Rebus.ServiceProvider Install-Package IronPdf

Configure your application to handle messaging over Rebus. To send and receive messages, configure Rebus with a message transport mechanism (like RabbitMQ or Azure Service Bus). This service can able to manage failed messages.

Here is a simple example where the queue name of the message transport is RabbitMQ:

// create service broker config
var services = new ServiceCollection();
// adding extension method to service
services.AddRebus(configure => configure
    .Transport(t => t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue"))
    .Routing(r => r.TypeBased().Map<MyMessage>("my-queue")));
var serviceProvider = services.BuildServiceProvider();
var bus = serviceProvider.GetRequiredService<IBus>();
await bus.Start();

// create service broker config
var services = new ServiceCollection();
// adding extension method to service
services.AddRebus(configure => configure
    .Transport(t => t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue"))
    .Routing(r => r.TypeBased().Map<MyMessage>("my-queue")));
var serviceProvider = services.BuildServiceProvider();
var bus = serviceProvider.GetRequiredService<IBus>();
await bus.Start();

' create service broker config
Dim services = New ServiceCollection()
' adding extension method to service
services.AddRebus(Function(configure) configure.Transport(Function(t) t.UseRabbitMq("amqp://guest:guest@localhost", "my-queue")).Routing(Function(r) r.TypeBased().Map(Of MyMessage)("my-queue")))
Dim serviceProvider = services.BuildServiceProvider()
Dim bus = serviceProvider.GetRequiredService(Of IBus)()
Await bus.Start()

Rebus and IronPDF can now be integrated to support and manage PDF creation jobs as part of messaging workflows. For Rebus instance, you may use Rebus to design message handlers that, when a certain message is received, produce PDFs.

public class GeneratePdfMessageHandler : IHandleMessages<GeneratePdfMessage>
{
    public async Task Handle(GeneratePdfMessage message)
    {
        var Renderer = new IronPdf.ChromePdfRenderer();
        var PDF = Renderer.RenderHtmlAsPdf(message.HtmlContent);
        PDF.SaveAs(message.OutputPath);
    }
}

public class GeneratePdfMessageHandler : IHandleMessages<GeneratePdfMessage>
{
    public async Task Handle(GeneratePdfMessage message)
    {
        var Renderer = new IronPdf.ChromePdfRenderer();
        var PDF = Renderer.RenderHtmlAsPdf(message.HtmlContent);
        PDF.SaveAs(message.OutputPath);
    }
}

Public Class GeneratePdfMessageHandler
	Implements IHandleMessages(Of GeneratePdfMessage)

	Public Async Function Handle(ByVal message As GeneratePdfMessage) As Task
		Dim Renderer = New IronPdf.ChromePdfRenderer()
		Dim PDF = Renderer.RenderHtmlAsPdf(message.HtmlContent)
		PDF.SaveAs(message.OutputPath)
	End Function
End Class

Lastly, you can initiate PDF creation tasks by sending messages to Rebus. As an illustration:

var message = new GeneratePdfMessage
{
    HtmlContent = "<h1>Hello, IronPDF!</h1>",
    OutputPath = "Sample.pdf"
};
await bus.Send(message);

var message = new GeneratePdfMessage
{
    HtmlContent = "<h1>Hello, IronPDF!</h1>",
    OutputPath = "Sample.pdf"
};
await bus.Send(message);

Dim message = New GeneratePdfMessage With {
	.HtmlContent = "<h1>Hello, IronPDF!</h1>",
	.OutputPath = "Sample.pdf"
}
Await bus.Send(message)

OUTPUT

Below is the output from the above source code above.

Conclusion

Finally, developers now have a strong toolbox for creating distributed systems with integrated document generation in .NET apps thanks to the combination of Rebus and IronPDF.

Developers can design diverse messaging patterns and coordinate communication between various distributed system components with Rebus's sturdy and adaptable messaging architecture. Conversely, IronPDF provides a complete solution for generating PDFs in .NET apps. Developers can use IronPDF to create professional-looking PDF documents from HTML content, photos, or unprocessed data, and they can alter the PDF's style and layout to suit their own needs.

All things considered, developers may create feature-rich, scalable, and dependable distributed systems with integrated document-generating capabilities by combining Rebus and IronPDF. Rebus and IronPDF offer a strong basis for developing cutting-edge .NET apps and services that benefit consumers, whether they are used for instantaneous document, report, or invoice generation services.

IronPDF also offers detailed documentation of its extensive features, along with multiple code examples.

IronPDF comes with an affordable lifetime license included in the bundle. The package is available for a very good deal, at just $749 for various systems. To license holders, it offers round-the-clock online engineering assistance. It also offers a free trial for additional information regarding the prices. Visit this website for additional information on Iron Software's offerings.