///<summary>
/// Wait for RabbitMQ to start up
///</summary>
public static async Task WaitForRabbitMQ(CancellationToken stoppingToken = new CancellationToken())
{
using var client = new TcpClient();
Log.Information("Waiting for RabbitMQ");
int attempt = 0;
var random = new Random();
while (true)
{
try
{
++attempt;
var source = new CancellationTokenSource(5000);
using var linked = CancellationTokenSource.CreateLinkedTokenSource(stoppingToken, source.Token);
await client.ConnectAsync(Constants.RabbitHost, Constants.RabbitPort, linked.Token);
break;
}
catch
{
await random.WaitForExponentialDelay(attempt - 1, stoppingToken);
// We have waited long enough
if (attempt > 6)
{
Log.Fatal("Unable to connect to {Host}:{Port}", Constants.RabbitHost, Constants.RabbitPort);
throw new InvalidOperationException($"Unable to connect to {Constants.RabbitHost}:{Constants.RabbitPort}");
}
}
}
Log.Information("RabbitMQ should be up!");
}
public async Task TryConnect(string uriString, string exchangeName, string routingKey, CancellationToken stoppingToken)
{
var random = new Random();
int attempt = 0;
while (!IsConnected)
{
try
{
++attempt;
Connect(uriString, exchangeName, routingKey);
break;
}
catch
{
logger.LogInformation("Waiting for {Duration}", Constants.DelayBetweenConnectionAttempts);
await random.WaitForExponentialDelay(attempt - 1, stoppingToken);
}
}
}
