/// <summary>
/// Process a task and update the status
/// </summary>
/// <param name="task">The task item to process</param>
/// <param name="token">The cancellation token, if any</param>
/// <returns></returns>
public virtual async Task <TransformationProcessTaskStatus> ProcessTaskAsync(PageTransformationTask task,
CancellationToken token = default)
{
if (task == null)
{
throw new ArgumentNullException(nameof(task));
}
var logger = ServiceProvider.GetRequiredService <ILogger <LongRunningTransformationProcessBase> >();
var pageTransformator = ServiceProvider.GetRequiredService <IPageTransformator>();
// Retrieve the status for the task
var taskStatus = await GetTaskStatusAsync(task.Id, token).ConfigureAwait(false);
// Check if task has been already processed
if (taskStatus.State != TransformationTaskExecutionState.Pending)
{
// Skip
return(taskStatus);
}
// Retrieve current process status
var status = await GetStatusAsync(token).ConfigureAwait(false);
// Process is not running, skip the task
if (status.State != TransformationExecutionState.Running)
{
// Mark task as aborted
taskStatus = TransformationProcessTaskStatus.CreateNormal(Id, task.Id, taskStatus.CreationDate, taskStatus.StartDate, DateTimeOffset.Now, TransformationTaskExecutionState.Aborted);
await ChangeTaskStatusAsync(taskStatus, token).ConfigureAwait(false);
return(taskStatus);
}
try
{
// Mark task as running
taskStatus = TransformationProcessTaskStatus.CreateNormal(Id, task.Id, taskStatus.CreationDate, DateTimeOffset.Now, null, TransformationTaskExecutionState.Running);
await ChangeTaskStatusAsync(taskStatus, token).ConfigureAwait(false);
// Run the actual transformation task
await pageTransformator.TransformAsync(task, token).ConfigureAwait(false);
// Mark task as completed
taskStatus = TransformationProcessTaskStatus.CreateNormal(Id, task.Id, taskStatus.CreationDate, taskStatus.StartDate, DateTimeOffset.Now, TransformationTaskExecutionState.Completed);
await ChangeTaskStatusAsync(taskStatus, token).ConfigureAwait(false);
return(taskStatus);
}
catch (Exception ex)
{
logger.LogError(ex, "Error while transforming task {id}", task.Id);
// Mark task as faulted
taskStatus = TransformationProcessTaskStatus.CreateFaulted(Id, task.Id, taskStatus.CreationDate, taskStatus.StartDate, DateTimeOffset.Now, ex);
await ChangeTaskStatusAsync(taskStatus, token).ConfigureAwait(false);
return(taskStatus);
}
}
private async Task Run(ISourceProvider sourceProvider, PnPContext targetContext, CancellationToken token)
{
try
{
// Iterate through each task
await foreach (var task in transformationDistiller.GetPageTransformationTasksAsync(sourceProvider, targetContext, token))
{
var taskStatus = TransformationProcessTaskStatus.CreateNormal(Id, task.Id, DateTimeOffset.Now, DateTimeOffset.Now, null, TransformationTaskExecutionState.Running);
try
{
// Save the task status to pending
await ChangeTaskStatusAsync(taskStatus).ConfigureAwait(false);
// Execute the actual transformation task
await pageTransformator.TransformAsync(task, token).ConfigureAwait(false);
// Save the task status to completed
taskStatus = TransformationProcessTaskStatus.CreateNormal(Id, task.Id, taskStatus.CreationDate, taskStatus.StartDate, DateTimeOffset.Now, TransformationTaskExecutionState.Completed);
await ChangeTaskStatusAsync(taskStatus).ConfigureAwait(false);
}
catch (Exception ex)
{
logger.LogError(ex, "Error while transforming task {id}", task.Id);
// Save the task status to faulted
taskStatus = TransformationProcessTaskStatus.CreateFaulted(Id, task.Id, taskStatus.CreationDate, taskStatus.StartDate, DateTimeOffset.Now, ex);
await ChangeTaskStatusAsync(taskStatus).ConfigureAwait(false);
}
}
// Mark the process as completed
await ChangeProcessStateAsync(TransformationExecutionState.Completed).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
// Mark the process as aborted and ignore this kind of error
await ChangeProcessStateAsync(TransformationExecutionState.Aborted).ConfigureAwait(false);
}
catch (Exception ex)
{
logger.LogError(ex, "The entire process has failed");
// Mark the process as faulted
await ChangeProcessStateAsync(TransformationExecutionState.Faulted).ConfigureAwait(false);
}
}
