OpenSleigh.Transport.AzureServiceBus 2.0.3

OpenSleigh.Transport.AzureServiceBus

Description

Azure Service Bus Transport library for OpenSleigh.

This library is making use of Topics, therefore, to work properly it requires at least Standard Tier. For more information on Azure Service Bus prices, check the <a href='https://azure.microsoft.com/en-ca/pricing/details/service-bus/' target='_blank'>official documentation</a>.

Installation

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

How-to

The first thing to do is build an instance of AzureServiceBusConfiguration 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 UseAzureServiceBusTransport extension method:

services.AddOpenSleigh(cfg =>{     
    var connStr = Configuration.GetConnectionString("AzureServiceBus");
    var config = new AzureServiceBusConfiguration(connStr);
    cfg.UseAzureServiceBusTransport(config);

    // register the Persistence and the Sagas
});

It is also possible to use a custom naming policy to define the names for topics and subscriptions. This opens the door to multiple, different scenarios (eg. a single topic with multiple subscriptions, one per message).

services.AddOpenSleigh(cfg =>{  
    // code omitted
    cfg.UseAzureServiceBusTransport(config, builder =>
    {                        
        builder.UseMessageNamingPolicy<StartParentSaga>(() =>
                        new QueueReferences("my-topic", "start-parent-saga"));
        builder.UseMessageNamingPolicy<ProcessParentSaga>(() =>
                        new QueueReferences("my-topic", "process-parent-saga"));
    })
});

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))
        .UseAzureServiceBusTransport();
});

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