/// <summary>
/// Wraps a task for calling all reports when it is done.
/// </summary>
/// <param name="jobResult"></param>
/// <returns></returns>
private Task <JobResult> ForEachReport(Task <JobResult> realJob)
{
if (this.Reports.Count == 0)
{
return(realJob);
}
return(new Task <JobResult>(() =>
{
realJob.Start();
JobResult result = realJob.Result;
foreach (var item in this.Reports)
{
item.Report(result);
}
return result;
}));
}
/// <summary>
/// <para>
/// Creates and starts the job.
/// </para>
///
/// <para>
/// Concurrent calls to this method will create and start
/// the same job.
/// </para>
/// </summary>
/// <returns>A running task with a job.</returns>
public Task <JobResult> Work()
{
return(new Task <JobResult>(() =>
{
SourceType data;
DestinationType destinationData;
lock (this.Extractor)
{
try
{
data = this.Extractor.Extract();
}
catch (Exception ExtractionException)
{
return JobResult.BuildWithError(
this.Extractor.GetID(),
this.Transformer.GetID(),
this.loader.GetID(),
new JobException(
$"Unhandled exception proccesing extractor '{this.Extractor.GetID()}'.",
this.Extractor.GetID(),
Phase.EXTRACTION,
ExtractionException
)
);
}
}
lock (this.Transformer)
{
try
{
destinationData = this.Transformer.Transform(data);
}
catch (Exception TransformationException)
{
return JobResult.BuildWithError(
this.Extractor.GetID(),
this.Transformer.GetID(),
this.loader.GetID(),
new JobException(
$"Unhandled exception processing transformer '{this.Transformer.GetID()}'.",
this.Transformer.GetID(),
Phase.TRANSFORMATION,
TransformationException
)
);
}
}
lock (this.loader)
{
try
{
this.loader.Load(destinationData);
}
catch (Exception eLoading)
{
return JobResult.BuildWithError(
this.Extractor.GetID(),
this.Transformer.GetID(),
this.loader.GetID(),
new JobException(
$"Unhandled exception processing loader '{this.loader.GetID()}'.",
this.loader.GetID(),
Phase.LOADING,
eLoading
)
);
}
}
return JobResult.BuildCompletedWithoutErrors(
this.Extractor.GetID(),
this.Transformer.GetID(),
this.loader.GetID()
);
}));
}