private void InitChannel()
{
if (_channel != null)
{
return;
}
lock (_mutex)
{
if (_channel == null)
{
_channel = _connection.CreateChannel();
}
}
}
//TODO: BasicReturnEventHandler
//TODO: channel и многопоточность - как не создавать каждый раз channel?
public async Task PublishAsync <T>(Exchange exchange, string routingKey, T message,
Dictionary <string, string> headers = null)
{
var span = _tracer.BuildSpan(nameof(PublishAsync)).Start();
span.SetTag(nameof(message), JsonConvert.SerializeObject(message));
try
{
using (var channel = _connection.CreateChannel())
{
channel.ExchangeDeclare(exchange.Name, exchange.Type, exchange.IsDurable);
var properties = channel.CreateBasicProperties();
properties.ContentType = "application/json";
properties.DeliveryMode = 2;
properties.Persistent = true;
_tracer.Inject(_tracer.ActiveSpan.Context, BuiltinFormats.HttpHeaders,
new HttpHeadersCarrier(properties.Headers));
if (headers != null)
{
foreach (var header in headers)
{
properties.Headers.Add(header.Key, header.Value);
}
}
var body = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(message));
channel.BasicPublish(exchange.Name, routingKey, true, properties, body);
}
}
finally
{
span.Finish();
}
}