/// <summary>
/// Loads all previous results from a given directory.
/// </summary>
/// <param name="jobID">The identifier of the job represented by
/// the directory</param>
/// <param name="dir">The directory to load from</param>
/// <returns>An enumerable set of previous results.</returns>
private ICollection <PersistedResult> _loadFromDir(Guid jobID, string dir)
{
ICollection <PersistedResult> results = new List <PersistedResult>();
var files = Directory.EnumerateFiles(dir, "*.png");
foreach (string fileName in files)
{
PersistedResult result = _createResult(jobID, fileName);
if (result != null)
{
results.Add(result);
}
}
return(results);
}
/// <summary>
/// Saves the result to the provided job.
/// </summary>
/// <param name="job">The job associated with the result.</param>
/// <param name="result">The result to save</param>
private void _storeResult(Guid job, PersistedResult result)
{
ICollection <PersistedResult> results = null;
_resultsMap.TryGetValue(job, out results);
if (results != null)
{
results.Add(result);
}
else
{
results = new List <PersistedResult>();
results.Add(result);
_resultsMap.Add(job, results);
}
}
/// <summary>
/// Persits the output of a job.
/// </summary>
/// <param name="jobID">The unique identifier of the job to save
/// the image against.</param>
/// <param name="output">The <see cref="Image"/> generated from a
/// complete job.</param>
/// <param name="identifier">The identifier for the input provided
/// by the client.</param>
public void Persist(Guid jobID, Image output, object identifier)
{
PersistedResult r = null;
if (identifier is string)
{
r = new PersistedResult(output, (string)identifier);
}
else
{
r = new PersistedResult(output, _sequence);
}
_sequence++;
_storeResult(jobID, r);
}
/// <summary>
/// Deletes a result from a particular job with the associated identifier
/// from the storage.
/// </summary>
/// <param name="jobID">The unique identifier of the job to delete
/// the results for.</param>
/// <param name="identifier">The identifier given to the input to be
/// deleted.</param>
/// <returns><c>true</c> if the result from the job was deleted
/// successfully; <c>false</c> otherwise.</returns>
public bool Delete(Guid jobID, object identifier)
{
if (_resultsMap.ContainsKey(jobID) == false)
{
return(false);
}
ICollection <PersistedResult> results = _resultsMap[jobID];
PersistedResult result = results.Where(x => x.Identifier == identifier).FirstOrDefault();
if (result != null)
{
results.Remove(result);
return(true);
}
else
{
return(false);
}
}