/// <summary>
/// Inserts asynchronous task information to the database
/// </summary>
/// <returns></returns>
public AsyncProcessingServiceParameterValue InsertData()
{
// Create array data to serilize.
byte[] arrayData = { 1, 2, 3, 4, 5 };
// Sets parameters of AsyncProcessingServiceParameterValue to insert asynchronous task information.
AsyncProcessingServiceParameterValue asyncParameterValue = new AsyncProcessingServiceParameterValue("AsyncProcessingService", "InsertTask", "InsertTask", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.UserId = "A";
asyncParameterValue.ProcessName = "AAA";
asyncParameterValue.Data = AsyncSvc_sample.LayerB.SerializeToBase64String(arrayData);
asyncParameterValue.ExecutionStartDateTime = DateTime.Now;
asyncParameterValue.RegistrationDateTime = DateTime.Now;
asyncParameterValue.NumberOfRetries = 0;
asyncParameterValue.ProgressRate = 0;
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)(AsyncProcessingServiceParameterValue.AsyncStatus.Register);
asyncParameterValue.CommandId = 0;
asyncParameterValue.ReservedArea = "xxxxxx";
DbEnum.IsolationLevelEnum iso = DbEnum.IsolationLevelEnum.DefaultTransaction;
AsyncProcessingServiceReturnValue asyncReturnValue;
// Execute do business logic method.
AsyncProcessingService.LayerB layerB = new AsyncProcessingService.LayerB();
asyncReturnValue = (AsyncProcessingServiceReturnValue)layerB.DoBusinessLogic((AsyncProcessingServiceParameterValue)asyncParameterValue, iso);
return(asyncParameterValue);
}
/// <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
AsyncProcessingServiceParameterValue asyncParameterValue = new AsyncProcessingServiceParameterValue("AsyncProcessingService", "StopAllTask", "StopAllTask", "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.StatusId = (int)AsyncProcessingServiceParameterValue.AsyncStatus.Processing;
asyncParameterValue.CommandId = (int)AsyncProcessingServiceParameterValue.AsyncCommand.Stop;
LayerB layerB = new LayerB();
AsyncProcessingServiceReturnValue asyncReturnValue = (AsyncProcessingServiceReturnValue)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>
/// 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 AsyncProcessingServiceReturnValue UpdateAsyncTask(AsyncProcessingServiceReturnValue selectedAsyncTask, string updateTask, string exceptionInfo = null)
{
AsyncProcessingServiceParameterValue asyncParameterValue = new AsyncProcessingServiceParameterValue("AsyncProcessingService", updateTask, updateTask, "SQL",
new MyUserInfo("AsyncProcessingService", "AsyncProcessingService"));
asyncParameterValue.TaskId = selectedAsyncTask.TaskId;
// Update databse based on task
switch (updateTask)
{
case AsyncTaskUpdate.START:
asyncParameterValue.ExecutionStartDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncProcessingServiceParameterValue.AsyncStatus.Processing;
break;
case AsyncTaskUpdate.RETRY:
if (exceptionInfo.Length > 512)
{
exceptionInfo = exceptionInfo.Substring(0, 512);
}
asyncParameterValue.NumberOfRetries = selectedAsyncTask.NumberOfRetries;
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncProcessingServiceParameterValue.AsyncStatus.AbnormalEnd;
asyncParameterValue.ExceptionInfo = exceptionInfo;
break;
case AsyncTaskUpdate.FAIL:
if (exceptionInfo.Length > 512)
{
exceptionInfo = exceptionInfo.Substring(0, 512);
}
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.StatusId = (int)AsyncProcessingServiceParameterValue.AsyncStatus.Abort;
asyncParameterValue.ExceptionInfo = exceptionInfo;
break;
case AsyncTaskUpdate.SUCCESS:
asyncParameterValue.CompletionDateTime = DateTime.Now;
asyncParameterValue.ProgressRate = 100;
asyncParameterValue.StatusId = (int)AsyncProcessingServiceParameterValue.AsyncStatus.End;
break;
}
LayerB layerB = new LayerB();
AsyncProcessingServiceReturnValue asyncReturnValue = (AsyncProcessingServiceReturnValue)layerB.DoBusinessLogic(
(BaseParameterValue)asyncParameterValue, DbEnum.IsolationLevelEnum.ReadCommitted);
return asyncReturnValue;
}
/// <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.
AsyncProcessingServiceParameterValue asyncParameterValue = new AsyncProcessingServiceParameterValue("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);
LayerB layerB = new LayerB();
AsyncProcessingServiceReturnValue selectedAsyncTask = (AsyncProcessingServiceReturnValue)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.START);
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._infiniteLoop = false;
LogIF.ErrorLog("ASYNC-SERVICE", string.Format(GetMessage.GetMessageDescription("E0000"), ex.Message.ToString()));
}
}
}
