public ActionResult <Chat> Create(Chat chat)
{
chatsService.Create(chat);
return(CreatedAtRoute("GetChat", new { id = chat.Id.ToString() }, chat));
}
public async Task KafkaConsumer()
{
List <string> topicListFromDB = chatsService.GetTopics();
ConsumerConfig config = JsonConvert.DeserializeObject <ConsumerConfig>(System.IO.File.ReadAllText(Constant.ConsumerConfigFilePath));
var topicListFromServer = AdminClient.RemoveAdminTopics(AdminClient.getMetadata(Constant.BrokerIP));
foreach (string topic in topicListFromServer)
{
if (!topicListFromDB.Contains(topic))
{
Chat chat = new Chat(topic);
chatsService.Create(chat);
}
}
using (var consumer = new ConsumerBuilder <Ignore, byte[]>(config).Build())
{
string fileName = "";
consumer.Subscribe(topicListFromServer);
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress += (_, e) =>
{
e.Cancel = true; // prevent the process from terminating.
cts.Cancel();
};
try
{
while (true)
{
try
{
var cr = consumer.Consume(cts.Token);
Console.WriteLine(cr.Topic);
// store the image
if (cr.Topic.Equals("FileContent"))
{
if (fileName != "")
{
Console.WriteLine(cr.Value);
FileStream myFile = System.IO.File.Open(@B3Image + fileName, FileMode.Create, FileAccess.Write);
BinaryWriter myWriter = new BinaryWriter(myFile);
myWriter.Write(cr.Value);
myWriter.Close();
myFile.Close();
fileName = "";
}
}
else if (cr.Topic.Equals("FileName"))
{
fileName = Encoding.Default.GetString(cr.Value);
}
else
{
var incomming = new Chat();
try
{
ChatLine chatPackage = JsonConvert.DeserializeObject <List <ChatLine> >(Encoding.Default.GetString(cr.Value)).First();
incomming = new Chat(cr.Topic, chatPackage);
}
catch (Exception)
{
Console.WriteLine("Deserialize failed, check MongoDB if it is delivered from CLI.");
ChatLine chatPackage = new ChatLine(Encoding.Default.GetString(cr.Value), "CLTestUser");
incomming = new Chat(cr.Topic, chatPackage);
}
if (topicListFromDB.Contains(cr.Topic))
{
//Add new line to DB
chatsService.UpdateByTopic(cr.Topic, incomming);
}
else
{
//create new Topic
chatsService.Create(incomming);
topicListFromDB.Add(cr.Topic);
}
var allChats = JsonConvert.SerializeObject
(
chatsService.Get(),
new JsonSerializerSettings {
ContractResolver = new CamelCasePropertyNamesContractResolver()
}
);
await chatHub.SendMessage(allChats);
}
}
catch (ConsumeException e)
{
Console.WriteLine($"Error occured: {e.Error.Reason}");
}
}
}
catch (OperationCanceledException)
{
// Ensure the consumer leaves the group cleanly and final offsets are committed.
consumer.Close();
}
}
}