使用Web Api服务进行多次呼叫

Question

I am using Web Api Service to Pass the Data to my Mobile Devices.

There can be 2 scenario for this.

1. Single Device Requesting Multiple Times
2. Multiple Device Requesting Multiple Times

In Both the Scenario i am not able to handle multiple Request, I don't know what is the actual problem but it's keep giving me the 403 Response and 500 Response .

I need to handle Multiple request within seconds as I am Dealing with more then 1000 Devices at the same time and side by side i also need to respond them within seconds because we don't want that our devices wait for the Response for more then few Seconds.

Currently I am using Azure platform for the Web Api services and working with MVC 4.0 Using LINQ. If you want my code then i will provide you the Code (I am using repository Pattern in my Project)

Code

Controller :

[HttpPost]
public JObject GetData(dynamic data)
{
   JObject p = new JObject();

   try
    {
      MyModelWithObjectInData transactionbatchData = JsonConvert.DeserializeObject<MyModelWithObjectInData>(data.ToString());
      return _batchDataService.batchAllDataResponse(transactionbatchData);//Call Repository 
    }
}

Repository :

public JObject batchAllDataResponse(MyModelWithObjectInData oData)
{
   JObject p = new JObject();
   var serviceResponseModel = new MyModelWithObjectInData();
   using (var transaction = new TransactionScope())
   {
     //Insert in Tables
   }

//Select Inserted Records
var batchData = (from p in datacontext.Table1
                 where p.PK == oData.ID select p).FirstOrDefault();

 if (batchData != null)
    {
      serviceResponseModel.GetBatchDataModel.Add(new BatchDataModel //List Residing in MyModelWithObjectInData Class File
       {
            //add values to list
       });       
    }

//Performing 3 Operations to Add Data in Different List (All 3 are Selecting the Values from Different Tables) as i need to Give Response with 3 Different List.

 return p = JObject.FromObject(new
        {
            batchData = serviceResponseModel.GetBatchDataModel,
            otherdata1 = serviceResponseModel.otherdata1, //list Residing in my MyModelWithObjectInData Model 
            otherdata2 = serviceResponseModel.otherdata2 //list Residing in my MyModelWithObjectInData Model
        });

I have used below code to track all the request coming through the Service but i am getting error within this.

//here i am getting error
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
   //var content = request.Content.ReadAsStringAsync().Result;
   ServiceTypes myObjs = JsonConvert.DeserializeObject<ServiceTypes>(request.Content.ReadAsStringAsync().Result);

    bool result = _serviceLogService.InsertLogs(request, myObjs); //Getting Error while inserting data here on multiple request
    return base.SendAsync(request, cancellationToken).ContinueWith((task) =>
      {
        HttpResponseMessage response = task.Result;
        return response;
      });
}

Any Help in this would be Much Appreciated.

Answer 1

Providing a code snippet of your data calls from your api service would be most handy. Their are a few ways to handle concurrent queries; if you have not explored it yet the async and await method would be best to leverage in this scenario. But this is from a vague stand point I would need to look at your code to provide you a definitive answer.

Additional information "If you're new to asynchronous programming or do not understand how an async method uses the await keyword to do potentially long-running work without blocking the caller's thread, you should read the introduction in Asynchronous Programming with Async and Await (C# and Visual Basic) ."

Hopefully, this information puts you on the right track.

Best.

Answer 2

I found the Solution using Async Method to Handled Recurring Request of Services

protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
  //Logic to Track all the Request
  var response = await base.SendAsync(request, cancellationToken);
  return response;
}

My Controller in not able to initiate the context file as request it's already initiated and "concurrent requests" that dead locking my objects because i am getting multiple request from the devices so that i have modified he code to Logs all the Service within SendAsync Method and await helps me to wait until the task completed.