/// <summary>
/// Initializes a new instance of the <see cref="MessageRouter"/> class.
/// </summary>
/// <param name="serviceProvider">The service provider instance to retrieve all the <see cref="IMessageHandler{TMessage,TMessageContext}"/> instances.</param>
/// <param name="options">The consumer-configurable options to change the behavior of the router.</param>
/// <param name="logger">The logger instance to write diagnostic trace messages during the routing of the message.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="serviceProvider"/> is <c>null</c>.</exception>
protected MessageRouter(IServiceProvider serviceProvider, MessageRouterOptions options, ILogger logger)
{
Guard.NotNull(serviceProvider, nameof(serviceProvider), "Requires a service provider instance to retrieve all the registered message handlers");
ServiceProvider = serviceProvider;
Options = options ?? new MessageRouterOptions();
Logger = logger ?? NullLogger <MessageRouter> .Instance;
_fallbackMessageHandler = new Lazy <IFallbackMessageHandler>(() => serviceProvider.GetService <IFallbackMessageHandler>());
}
/// <summary>
/// Initializes a new instance of the <see cref="MessageRouter"/> class.
/// </summary>
/// <param name="serviceProvider">The service provider instance to retrieve all the <see cref="IMessageHandler{TMessage,TMessageContext}"/> instances.</param>
/// <param name="options">The consumer-configurable options to change the behavior of the router.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="serviceProvider"/> is <c>null</c>.</exception>
public MessageRouter(IServiceProvider serviceProvider, MessageRouterOptions options)
: this(serviceProvider, options, NullLogger.Instance)
{
Guard.NotNull(serviceProvider, nameof(serviceProvider), "Requires a service provider instance to retrieve all the registered message handlers");
}
