/// <summary>
/// Publish a single request using the KubeMQ , response will return in the passed handler.
/// </summary>
/// <param name="handler">Method that will be activated once receiving response.</param>
/// <param name="request">The KubeMQ.SDK.csharp.RequestReply.LowLevel.request that will be sent to the kubeMQ.</param>
/// <returns>A task that represents the request that was sent using the SendRequest.</returns>
public async Task SendRequest(Request request, HandleResponseDelegate handler)
{
try
{
//LogRequest(request);
InnerRequest innerRequest = request.Convert();
// Send request and wait for response
InnerResponse innerResponse = await GetKubeMQClient().SendRequestAsync(innerRequest, Metadata);
// convert InnerResponse to Response and return response to end user
Response response = new Response(innerResponse);
// send the response to the end-user response handler
handler(response);
}
catch (RpcException ex)
{
logger.LogError($"Grpc Exception in SendRequest. Status: {ex.Status}");
throw new RpcException(ex.Status);
}
catch (Exception ex)
{
logger.LogError(ex, "Exception in Initiator.SendRequest");
throw ex;
}
}
/// <summary>
/// Publish a single request using the KubeMQ.
/// </summary>
/// <param name="request"></param>
/// <returns>KubeMQ KubeMQ.SDK.csharp.RequestReply.Response.</returns>
public Response SendRequest(Request request)
{
try
{
//LogRequest(request);
InnerRequest innerRequest = request.Convert();
// Send request and wait for response
InnerResponse innerResponse = GetKubeMQClient().SendRequest(innerRequest, Metadata);
// convert InnerResponse to Response and return response to end user
return(new Response(innerResponse));
}
catch (RpcException ex)
{
logger.LogError($"Grpc Exception in SendRequestAsync. Status: {ex.Status}");
throw new RpcException(ex.Status);
}
catch (Exception ex)
{
logger.LogError(ex, "Exception in Initiator.SendRequestAsync");
return(null);
}
}
/// <summary>
/// Register to kubeMQ Channel using KubeMQ.SDK.csharp.Subscription.SubscribeRequest with RespondDelegate .
/// </summary>
/// <param name="subscribeRequest">Parameters list represent by KubeMQ.SDK.csharp.Subscription.SubscribeRequest that will determine the subscription configuration.</param>
/// <param name="handler">Method the perform when receiving KubeMQ.SDK.csharp.RequestReplay.RequestReceive </param>
/// <returns>A task that represents the Subscribe Request.</returns>
public void SubscribeToRequests(SubscribeRequest subscribeRequest, RespondDelegate handler)
{
ValidateSubscribeRequest(subscribeRequest);// throws ArgumentException
Task grpcListnerTask = Task.Run((Func <Task>)(async() =>
{
while (true)
{
try
{
await SubscribeToRequests(subscribeRequest);
}
catch (Exception ex)
{
logger.LogWarning(ex, $"An exception occurred while listening for request");
}
await Task.Delay(1000);
}
}));
// send requests to end-user and send his response via GRPC
Task handelAndRespondTask = Task.Run((Func <Task>)(async() =>
{
while (true)
{
// await for Request from queue
InnerRequest innerRequest = await _RecivedRequests.ReceiveAsync();
// Convert KubeMQ.Grpc.Request to RequestReceive
RequestReceive request = new RequestReceive(innerRequest);
try
{
// Activate end-user request handler and receive the response
Response response = handler(request);
// Convert
InnerResponse innerResponse = response.Convert();
LogResponse(innerResponse);
// Send Response via GRPC
GetKubeMQClient().SendResponse(innerResponse, _metadata);
}
catch (Exception ex)
{
logger.LogError(ex, "An exception occurred while handling the response");
}
}
}));
}
/// <summary>
/// Register to kubeMQ Channel using KubeMQ.SDK.csharp.Subscription.SubscribeRequest.
/// </summary>
/// <param name="subscribeRequest">Parameters list represent by KubeMQ.SDK.csharp.Subscription.SubscribeRequest that will determine the subscription configuration.</param>
/// <param name="cancellationToken">Optional param if needed to cancel the subscriber ,will receive RPC exception with status canceled through the error Delegate is called.</param>
/// <returns>A task that represents the Subscribe Request.</returns>
private async Task SubscribeToRequests(SubscribeRequest subscribeRequest, CancellationToken cancellationToken)
{
KubeMQGrpc.Subscribe innerSubscribeRequest = subscribeRequest.ToInnerSubscribeRequest();
using (var call = GetKubeMQClient().SubscribeToRequests(innerSubscribeRequest, Metadata, null, cancellationToken)) {
// await for requests form GRPC stream.
while (await call.ResponseStream.MoveNext())
{
// Received requests form GRPC stream.
InnerRequest request = call.ResponseStream.Current;
LogRequest(request);
// Add (Post) request to queue
_RecivedRequests.Post(request);
}
}
}
private void LogRequest(InnerRequest request)
{
logger.LogTrace($"Responder InnerRequest. ID:'{request.RequestID}', Channel:'{request.Channel}', ReplyChannel:'{request.ReplyChannel}'");
}
/// <summary>
/// Register to kubeMQ Channel using KubeMQ.SDK.csharp.Subscription.SubscribeRequest with RespondDelegate .
/// </summary>
/// <param name="subscribeRequest">Parameters list represent by KubeMQ.SDK.csharp.Subscription.SubscribeRequest that will determine the subscription configuration.</param>
/// <param name="handler">Method the perform when receiving KubeMQ.SDK.csharp.RequestReplay.RequestReceive </param>
/// <param name="errorDelegate">Method the perform when receiving error from KubeMQ.SDK.csharp.CommandQuery .</param>
/// <param name="cancellationToken">Optional param if needed to cancel the subscriber ,will receive RPC exception with status canceled through the error Delegate is called.</param>
/// <returns>A task that represents the Subscribe Request. Possible Exception: fail on ping to kubemq.</returns>
public void SubscribeToRequests(SubscribeRequest subscribeRequest, RespondDelegate handler, HandleCommandQueryErrorDelegate errorDelegate, CancellationToken cancellationToken = default(CancellationToken))
{
ValidateSubscribeRequest(subscribeRequest);// throws ArgumentException
try
{
this.Ping();
}
catch (Exception pingEx)
{
logger.LogWarning(pingEx, "n exception occurred while sending ping to kubemq");
throw pingEx;
}
Task grpcListnerTask = Task.Run((Func <Task>)(async() =>
{
while (true)
{
try
{
await SubscribeToRequests(subscribeRequest, cancellationToken);
}
catch (RpcException rpcx)
{
if (rpcx.StatusCode == StatusCode.Cancelled)
{
logger.LogWarning(rpcx, $"Cancellation was called ");
errorDelegate(rpcx);
break;
}
else
{
logger.LogWarning(rpcx, $"An RPC exception occurred while listening for events");
errorDelegate(rpcx);
}
}
catch (Exception ex)
{
logger.LogWarning(ex, $"An exception occurred while receiving request");
errorDelegate(ex);
}
await Task.Delay(1000);
}
}));
// send requests to end-user and send his response via GRPC
Task handelAndRespondTask = Task.Run((Func <Task>)(async() =>
{
while (true)
{
// await for Request from queue
InnerRequest innerRequest = await _RecivedRequests.ReceiveAsync();
// Convert KubeMQ.Grpc.Request to RequestReceive
RequestReceive request = new RequestReceive(innerRequest);
try
{
// Activate end-user request handler and receive the response
Response response = handler(request);
// Convert
InnerResponse innerResponse = response.Convert();
LogResponse(innerResponse);
// Send Response via GRPC
GetKubeMQClient().SendResponse(innerResponse, _metadata);
}
catch (Exception ex)
{
logger.LogError(ex, "An exception occurred while handling the response");
errorDelegate(ex);
}
}
}));
}
