Lightweight messaging wrapper of MassTransit
PM> Install-Package MetroBus
####Features:
- Currently only support RabbitMQ transport
- Provide easily create Producer and Consumer for Pub/Sub
- Provide easily Request/Response conversation
- Include incremental auto retry policy
- Include circuit breaker
- Include rate limiter
Initializing bus instance for Producer:
ISendEndpoint bus = await MetroBusInitializer.Instance.UseRabbitMq(string rabbitMqUri, string rabbitMqUserName, string rabbitMqPassword)
.InitializeProducer(string queueName);after bus instance initializing then you can use Send method with your queues channel TCommand type.
bus.Send<TCommand>(new
{
SomeProperty = SomeValue
}
);using for Consumer:
static void Main(string[] args)
{
BusHandle bus = MetroBusInitializer.Instance.UseRabbitMq(string rabbitMqUri, string rabbitMqUserName, string rabbitMqPassword)
.InitializeConsumer<TCommandConsumer>(string queueName)
// or .InitializeConsumer(string queueName, () => new TCommandConsumer())
.Start();
//if you want to stop
bus.Stop();
Console.ReadLine();
}TCommandConsumer could like below:
public class TCommandConsumer : IConsumer<TCommand>
{
public async Task Consume(ConsumeContext<TCommand> context)
{
var command = context.Message;
//do something...
await Console.Out.WriteAsync($"{command.SomeProperty}");
}
}Initializing bus instance for Request/Response conversation:
IRequestClient<TRequest, TResponse> client = MetroBusInitializer.Instance.UseRabbitMq(string rabbitMqUri, string rabbitMqUserName, string rabbitMqPassword)
.InitializeRequestClient<TRequest, TResponse>(string queueName);
TResponse result = await client.Request(new TRequest
{
Command = "Say hello!"
});and consumer for Request/Response conversation could like below:
public class TCommandConsumer : IConsumer<TRequest>
{
public async Task Consume(ConsumeContext<TRequest> context)
{
var command = context.Message;
//do something...
await Console.Out.WriteAsync($"{command.SomeProperty}");
//and
context.Respond(new TRequest
{
Command = "Hello!"
});
}
}PS: Publisher and Consumer services must be used same TCommand interface. This is important for MassTransit integration. Also one other thing is rabbitMqUri parameter must start with "rabbitmq://" prefix.
There are several options you can set via fluent interface:
.UseIncrementalRetryPolicy(int retryLimit, int initialIntervalFromMinute, int intervalIncrementFromMinute, params Exception[] retryOnSpecificExceptionType).UseCircuitBreaker(int tripThreshold, int activeThreshold, int resetInterval).UseRateLimiter(int rateLimit, int interval)