/// <summary> Sequential method to write data chunk to file </summary>
/// <param name="task"> Task to process </param>
/// <param name="chunk"> Data chunk to save to file </param>
private void WriteToFile(GZipTask task, byte[] chunk)
{
Guard.NotNull(task, $"{nameof(task)}");
Guard.NotNull(chunk, $"{nameof(chunk)}");
var canProceedCallbackFunc = task.TaskSynchronizationParams.CanProceedFunc;
var taskNumber = task.TaskSynchronizationParams.TaskNumber;
var resetEvent = task.TaskSynchronizationParams.ResetEvent;
while (true)
{
var taskCanProceedExecution = canProceedCallbackFunc(taskNumber);
if (!taskCanProceedExecution)
{
resetEvent.Wait();
}
taskCanProceedExecution = canProceedCallbackFunc(taskNumber);
if (taskCanProceedExecution)
{
resetEvent.Reset();
_fileManager.WriteFileChunk(task.FilePathParams.OutputFilePath, chunk);
Log.Information($"Task {task.TaskSynchronizationParams.TaskNumber} executed");
break;
}
}
}
/// <summary> Process one task </summary>
/// <param name="task"> Compression or decompression gzip task </param>
public void ProcessTask(GZipTask task)
{
var fileChunk = _fileManager.ReadFileChunk(task.FilePathParams.InputFilePath,
task.FileChunk.StartPosition, task.FileChunk.ReadBytes);
var chunk = task.Operation.ProcessChunk(fileChunk);
// After parallel execution of read and process operation
// executed sequential write to file operation
WriteToFile(task, chunk);
}