public void Run()
{
if (Status != JobStatus.Pending) throw new InvalidOperationException("Job is not pending");
try
{
Directory.CreateDirectory(TempDirectory);
File.WriteAllText(Path.Combine(TempDirectory, "specification.json"), Specification.ToString());
SetStatus(JobStatus.Preparing);
Specification.Initialize(this);
var source = Specification.CreateDataSource();
PostProcessors = Specification.CreatePostProcessors().ToArray();
var jobDirectory = TempDirectory;
//The processors will consume data from this collection;
var items = new BlockingCollection<object>(ExecutionSettings.DataSourceBufferSize);
//Create the processors
var processors = Enumerable.Range(0, ExecutionSettings.ProcessingThreads).Select(i =>
{
IItemFieldLookup lookup = null;
try
{
lookup = new ItemDatabaseFieldLookup(Database.GetDatabase(ExecutionSettings.DatabaseName),
Specification.DefaultLanguage,
ExecutionSettings.FieldCacheSize);
}
catch (Exception ex)
{
Log.Error("Error initailizing item field lookup", ex, this);
}
var proc = new DataProcessor(Specification.CreateRootMapper())
{
BatchSize = ExecutionSettings.BatchSize,
FieldLookup = lookup
};
var exporter = Specification.CreateExporter(jobDirectory) as CsvExporter; //Move PartititionPrefix so this cast isn't necessary
if (exporter == null)
{
exporter = new CsvExporter(jobDirectory);
}
exporter.PartitionPrefix = "~" + i + "_";
exporter.KeepOutput = true; //Don't delete the job's main directory
proc.BatchWriter = new TableDataBatchWriter(exporter)
{
SyncLock = this,
MaximumSize = ExecutionSettings.SizeLimit
};
proc.Initialize();
return proc;
}).ToArray();
var hasUpdates = false;
//Allow post processors to validate their conditions (if any). This allows the job to fail before data is processed
//Allow post processors to filter data source for updates
foreach (var pp in PostProcessors)
{
pp.Validate(processors[0].Tables, Specification);
if (pp.UpdateDataSource(processors[0].Tables, source))
{
if (hasUpdates)
{
throw new InvalidOperationException("Only one post processor can update the data source");
}
hasUpdates = true;
}
}
EstimatedClientItemCount = source.Count;
//Start the processors
var processingThreads = processors.Select(p =>
{
var t = new Thread(() =>
{
try
{
p.Process(items.GetConsumingEnumerable());
}
catch (Exception ex)
{
LastException = ex;
SetStatus(JobStatus.Failed, ex.Message);
}
});
t.Start();
return t;
}).ToArray();
if (Status == JobStatus.Failed)
{
throw LastException;
}
SetStatus(JobStatus.Running);
source.ItemLoaded += (sender, args) =>
{
if (StatusUpdateFrequency <= 0 || ItemsProcessed % StatusUpdateFrequency == 0)
{
OnProgress();
}
ItemsProcessed = args;
RowsCreated = processors.Sum(p => p.RowsCreated);
};
//Add items to the collection that the processors consume
foreach (var item in source)
{
if (Status != JobStatus.Running)
{
break;
}
if (processors.Any(p => p.BatchWriter.End))
{
break;
}
items.Add(item);
}
items.CompleteAdding();
//Wait for processors to finish
foreach (var p in processingThreads)
{
p.Join();
}
RowsCreated = processors.Sum(p => p.RowsCreated);
if (Status == JobStatus.Running)
{
//Now we know how many items we got for sure. Update progress to 100%
EstimatedClientItemCount = ItemsProcessed;
SetStatus(JobStatus.Merging);
using (var csvWriter = Specification.CreateExporter(TempDirectory))
{
var tables = MergedTableData.FromTableSets(processors.Select(p => p.Tables)).ToArray();
var w = csvWriter as CsvExporter;
if (w == null || w.KeepOutput)
{
tables = csvWriter.Export(tables).ToArray();
}
File.WriteAllText(Path.Combine(jobDirectory, "schema.json"),
tables.Select(t => t.Schema).Serialize());
foreach (var postProcessor in PostProcessors)
{
CurrentPostProcessor = postProcessor;
SetStatus(JobStatus.PostProcessing, postProcessor.Name);
postProcessor.Process(jobDirectory, tables, Specification);
}
CurrentPostProcessor = null;
foreach (var proc in processors)
{
SizeLimitExceeded = SizeLimitExceeded || proc.BatchWriter.End;
proc.BatchWriter.Dispose();
}
SetStatus(JobStatus.Completing);
}
SetStatus(JobStatus.Completed);
}
}
catch (Exception ex)
{
Log.Error("Job failed", ex, this);
LastException = ex;
SetStatus(JobStatus.Failed, ex.ToString());
}
try
{
OnJobEnded();
}
catch (Exception ex)
{
Log.Error("Exception occured after job ended", ex, this);
LastException = ex;
}
EndDate = DateTime.Now;
try
{
if (Status == JobStatus.Canceled || Status == JobStatus.Failed)
{
Delete();
}
}
catch (Exception ex)
{
Log.Error("Exception occured while deleting job", ex, this);
}
}
