public static void Main(string[] args)
{
var configuration = GetConfiguration(args);
try
{
var prometheusConfig = configuration.GetSection("prometheusMetrics").Get <PrometheusConfig>();
MetricServer metricServer = null;
if (prometheusConfig.Enabled)
{
metricServer = new MetricServer(port: prometheusConfig.Port);
metricServer.Start();
}
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
var consumerConf = configuration.GetSection("consumerConf").Get <ConsumerConfig>();
consumerConf.GroupId = Guid.NewGuid().ToString();
ConsumerBuilder <Null, string> builder = new ConsumerBuilder <Null, string>(consumerConf);
builder.SetErrorHandler((_, error) =>
{
Console.WriteLine($"An error ocurred consuming the event: {error.Reason}");
if (error.IsFatal)
{
Environment.Exit(-1);
}
});
builder.HandleStatistics(new PrometheusConsumerStatisticsHandler(new string[] { "application" }, new string[] { "test-consumer-statistics" }));
builder.SetKeyDeserializer(Deserializers.Null);
builder.SetValueDeserializer(Deserializers.Utf8);
using (var kafkaConsumer = builder.Build())
{
kafkaConsumer.Subscribe(configuration.GetValue <string>("topic"));
while (!cancellationTokenSource.IsCancellationRequested)
{
ConsumeResult <Null, string> consumedResult;
try
{
consumedResult = kafkaConsumer.Consume(cancellationTokenSource.Token);
if (null != consumedResult)
{
Console.WriteLine($"Received message: {consumedResult.Value}");
}
}
catch (Exception ex)
{
Console.WriteLine("An error occurred consuming the event.", ex);
Environment.Exit(-2);
}
}
}
Console.WriteLine("Exit requested. Gracefully exiting...");
}
catch (Exception ex)
{
Console.WriteLine("An error occurred while starting up the test.", ex);
Environment.Exit(-2);
}
}