OpenSleigh.Transport.Kafka

Description

Kafka Transport library for OpenSleigh.

For more details, check the Official Documentation.

Installation

This library can be installed from Nuget: https://www.nuget.org/packages/OpenSleigh.Transport.Kafka/

How-to

The first thing to do is build an instance of KafkaConfiguration with the connection details. This can be done by reading the current app configuration. Once done, all you have to do is to call the UseKafkaTransport extension method:

services.AddOpenSleigh(cfg =>{     
    var connectionString = Configuration.GetConnectionString("kafka");
    var kafkaConfig = new KafkaConfiguration(connectionString);

    cfg.UseKafkaTransport(kafkaConfig);

    // register the Persistence and the Sagas
});

It is also possible to use a custom naming policy to customize the name of the Topic and the Dead Letter Queue:

services.AddOpenSleigh(cfg =>{  
    // code omitted
    cfg.UseKafkaTransport(kafkaConfig, builder =>
    {                        
        builder.UseMessageNamingPolicy<ProcessOrder>(() => new QueueReferences("orders", "orders.dead"));
    })
});

If your application has to handle messages and events, not just dispatch them, you also have to configure each Saga :

services.AddOpenSleigh(cfg =>{  
    // code omitted //

    cfg.AddSaga<MySaga, MySagaState>()
        .UseStateFactory<StartSaga>(msg => new MySagaState(msg.CorrelationId))
        .UseKafkaTransport();
});

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