/// <summary>
/// Inserts asynchronous task information to the database
/// </summary>
/// <returns>ApsParameterValue</returns>
public ApsParameterValue InsertData()
{
// Create list data to json serilize.
List <int> listData = new List <int> {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
};
// Sets parameters of ApsParameterValue to insert asynchronous task information.
ApsParameterValue parameterValue = new ApsParameterValue(
"AsyncProcessingService", "InsertTask", "InsertTask", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
parameterValue.UserId = "A";
parameterValue.ProcessName = "AAA";
parameterValue.Data = JsonConvert.SerializeObject(listData);
parameterValue.ExecutionStartDateTime = DateTime.Now;
parameterValue.RegistrationDateTime = DateTime.Now;
parameterValue.NumberOfRetries = 0;
parameterValue.ProgressRate = 0;
parameterValue.CompletionDateTime = DateTime.Now;
parameterValue.StatusId = (int)(AsyncStatus.Register);
parameterValue.CommandId = 0;
parameterValue.ReservedArea = "xxxxxx";
ApsLayerB layerB = new ApsLayerB();
ApsReturnValue returnValue = (ApsReturnValue)layerB.DoBusinessLogic(
(ApsParameterValue)parameterValue, DbEnum.IsolationLevelEnum.DefaultTransaction);
return(parameterValue);
}
/// <summary>
/// Updates the selected asynchronous task based type of SQL_Update_Method_name
/// </summary>
/// <param name="selectedAsyncTask">Selected Asynchronous Task</param>
/// <param name="updateTask">SQL_Update_Method_name</param>
/// <returns></returns>
public ApsReturnValue UpdateAsyncTask(ApsReturnValue selectedAsyncTask, AsyncTaskUpdate updateTask, string exceptionInfo = null)
{
ApsParameterValue asyncParameterValue = new ApsParameterValue(
"AsyncProcessingService", updateTask.ToString(), updateTask.ToString(), "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.TaskId = selectedAsyncTask.TaskId;
// Update databse based on task
switch (updateTask)
{
case AsyncTaskUpdate.UpdateTaskStart:
asyncParameterValue.ExecutionStartDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncStatus.Processing;
break;
case AsyncTaskUpdate.UpdateTaskRetry:
if (exceptionInfo.Length > 512)
{
exceptionInfo = exceptionInfo.Substring(0, 512);
}
asyncParameterValue.NumberOfRetries = selectedAsyncTask.NumberOfRetries;
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncStatus.AbnormalEnd;
asyncParameterValue.ExceptionInfo = exceptionInfo;
break;
case AsyncTaskUpdate.UpdateTaskFail:
if (exceptionInfo.Length > 512)
{
exceptionInfo = exceptionInfo.Substring(0, 512);
}
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncStatus.Abort;
asyncParameterValue.ExceptionInfo = exceptionInfo;
break;
case AsyncTaskUpdate.UpdateTaskSuccess:
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.ProgressRate = 100;
asyncParameterValue.StatusId = (int)AsyncStatus.End;
break;
}
ApsLayerB layerB = new ApsLayerB();
ApsReturnValue asyncReturnValue = (ApsReturnValue)layerB.DoBusinessLogic(
(BaseParameterValue)asyncParameterValue, DbEnum.IsolationLevelEnum.ReadCommitted);
return(asyncReturnValue);
}
/// <summary>
/// Sets Asynchronous Processing Service exception flag by checking prerequisites
/// </summary>
public void SetServiceException()
{
try
{
// Checks for successful connection to the database.
ApsParameterValue asyncParameterValue = new ApsParameterValue(
"AsyncProcessingService", "TestConnection", "TestConnection", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
ApsLayerB layerB = new ApsLayerB();
layerB.DoBusinessLogic((BaseParameterValue)asyncParameterValue, DbEnum.IsolationLevelEnum.NoTransaction);
// Asynchronous Processing Service initializes successfully without any errors
this._isServiceException = false;
}
catch (Exception ex)
{
// Service Failed due to unexpected exception.
this._isServiceException = true;
LogIF.ErrorLog("ASYNC-SERVICE", string.Format(GetMessage.GetMessageDescription("E0000"), ex.Message.ToString()));
}
}
/// <summary>
/// Stop the asynchronous service and Waits to complete all worker thread to complete.
/// </summary>
public void StopAsyncProcess()
{
// Breaks the infinite loop of Main thread.
this._infiniteLoop = false;
// Wait the end of the main thread.
this._mainThread.Join();
// Update stop command to all the running asynchronous task
ApsParameterValue asyncParameterValue = new ApsParameterValue(
"AsyncProcessingService", "StopAllTask", "StopAllTask", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.StatusId = (int)AsyncStatus.Processing;
asyncParameterValue.CommandId = (int)AsyncCommand.Stop;
ApsLayerB layerB = new ApsLayerB();
ApsReturnValue asyncReturnValue = (ApsReturnValue)layerB.DoBusinessLogic(
(BaseParameterValue)asyncParameterValue, DbEnum.IsolationLevelEnum.ReadCommitted);
if (asyncReturnValue.ErrorFlag)
{
LogIF.ErrorLog("ASYNC-SERVICE",
"ErrorMessageID: " + asyncReturnValue.ErrorMessageID +
"ErrorMessage: " + asyncReturnValue.ErrorMessage);
}
// Wait for all worker thread to be complete
LogIF.InfoLog("ASYNC-SERVICE", GetMessage.GetMessageDescription("I0004"));
while (this._workerThreadCount != 0)
{
// Wait for the completion of the worker thread.
Thread.Sleep(this._numberOfSeconds * 1000);
}
// Log after completing all worker threads
LogIF.InfoLog("ASYNC-SERVICE", GetMessage.GetMessageDescription("I0008"));
}
/// <summary>
/// Maintains the Main thread of the Asynchronous Service
/// </summary>
public void MainThreadInvoke()
{
// Asynchronous service is started
LogIF.InfoLog("ASYNC-SERVICE", GetMessage.GetMessageDescription("I0001"));
// Infinte loop processing for selecting register task.
while (this._infiniteLoop)
{
try
{
// Get asynchronous task from the database.
ApsParameterValue asyncParameterValue = new ApsParameterValue(
"AsyncProcessingService", "SelectTask", "SelectTask", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.RegistrationDateTime = DateTime.Now - new TimeSpan(_maxNumberOfHours, 0, 0);
asyncParameterValue.NumberOfRetries = this._maxNumberOfRetries;
asyncParameterValue.CompletionDateTime = DateTime.Now - new TimeSpan(_maxNumberOfHours, 0, 0);
ApsLayerB layerB = new ApsLayerB();
ApsReturnValue selectedAsyncTask = (ApsReturnValue)layerB.DoBusinessLogic(
(BaseParameterValue)asyncParameterValue, DbEnum.IsolationLevelEnum.ReadCommitted);
// Existence check of asynchronous task
if (string.IsNullOrEmpty(selectedAsyncTask.UserId))
{
// Asynchronous task does not exist.
// Wait for the asynchronous task to be registered in the database.
Thread.Sleep(this._numberOfSeconds * 1000);
// Continue to this infinite loop.
continue;
}
// Asynchronous task exists.
// Check the number of free worker threads.
int freeWorkerThreads = 0;
int completionPortThreads = 0;
// Gets the available threads.
ThreadPool.GetAvailableThreads(out freeWorkerThreads, out completionPortThreads);
while (freeWorkerThreads == 0)
{
// Wait for the completion of the worker thread.
Thread.Sleep(this._numberOfSeconds * 1000);
// Get available threads.
ThreadPool.GetAvailableThreads(out freeWorkerThreads, out completionPortThreads);
}
// Selected asynchronous task is assigned to a worker thread
this.UpdateAsyncTask(selectedAsyncTask, AsyncTaskUpdate.UpdateTaskStart);
LogIF.InfoLog("ASYNC-SERVICE", string.Format(
GetMessage.GetMessageDescription("I0002"), selectedAsyncTask.TaskId));
// Assign the task to the worker thread
ThreadPool.QueueUserWorkItem(new WaitCallback(this.WorkerThreadCallBack), (object)selectedAsyncTask);
}
catch (Exception ex)
{
// Service Failed due to unexpected exception.
this._isServiceException = true;
this._infiniteLoop = false;
LogIF.ErrorLog("ASYNC-SERVICE", string.Format(
GetMessage.GetMessageDescription("E0000"), ex.Message.ToString()));
}
}
}