/// <summary>
/// Commits all changes. Waits for the operation to complete.
/// </summary>
protected override void DoSaveChanges()
{
if (_optimisticLockingEnabled)
{
// get subject entity and see if there is a version triple
var subjects =
AddTriples.Select(x => x.Subject)
.Distinct()
.Union(DeletePatterns.Select(x => x.Subject).Distinct())
.Except(new[] { Constants.WildcardUri })
.ToList();
foreach (var subject in subjects)
{
var entity = LookupDataObject(subject);
if (entity == null)
{
throw new BrightstarClientException("No Entity Found for Subject " + subject);
}
var version = entity.GetPropertyValue(Constants.VersionPredicateUri);
if (version == null)
{
// no existing version information so assume this is the first
entity.SetProperty(Constants.VersionPredicateUri, 1);
}
else
{
var intVersion = Convert.ToInt32(version);
// inc version
intVersion++;
entity.SetProperty(Constants.VersionPredicateUri, intVersion);
Preconditions.Add(new Triple
{
Subject = subject,
Predicate = Constants.VersionPredicateUri,
Object = version.ToString(),
IsLiteral = true,
DataType = RdfDatatypes.Integer,
LangCode = null,
Graph = VersionGraphUri
});
}
}
}
try
{
Client.ApplyTransaction(Preconditions, DeletePatterns, AddTriples, UpdateGraphUri);
}
catch (TransactionPreconditionsFailedException)
{
Preconditions.Clear();
throw;
}
// reset changes
ResetTransactionData();
}
/// <summary>
/// Commits all changes. Waits for the operation to complete.
/// </summary>
protected override void DoSaveChanges()
{
if (_optimisticLockingEnabled)
{
// get subject entity and see if there is a version triple
var subjects =
AddTriples.Select(x => x.Subject)
.Distinct()
.Union(DeletePatterns.Select(x => x.Subject).Distinct())
.Except(new[] { Constants.WildcardUri }).ToList();
foreach (var subject in subjects)
{
var entity = LookupDataObject(subject);
if (entity == null)
{
throw new BrightstarClientException("No Entity Found for Subject " + subject);
}
var version = entity.GetPropertyValue(Constants.VersionPredicateUri);
if (version == null)
{
// no existing version information so assume this is the first time using it with 1
entity.SetProperty(Constants.VersionPredicateUri, 1);
}
else
{
var intVersion = Convert.ToInt32(version);
// inc version
intVersion++;
entity.SetProperty(Constants.VersionPredicateUri, intVersion);
Preconditions.Add(new Triple
{
Graph = VersionGraphUri,
DataType = RdfDatatypes.Integer,
IsLiteral = true,
LangCode = null,
Object = version.ToString(),
Predicate = Constants.VersionPredicateUri,
Subject = subject
});
}
}
}
var deleteData = new StringWriter();
var dw = new BrightstarTripleSinkAdapter(new NQuadsWriter(deleteData, UpdateGraphUri));
foreach (var triple in DeletePatterns)
{
dw.Triple(triple);
}
deleteData.Close();
var addData = new StringWriter();
var aw = new BrightstarTripleSinkAdapter(new NQuadsWriter(addData, UpdateGraphUri));
foreach (var triple in AddTriples)
{
aw.Triple(triple);
}
addData.Close();
var preconditionsData = new StringWriter();
var pw = new BrightstarTripleSinkAdapter(new NQuadsWriter(preconditionsData, UpdateGraphUri));
foreach (var triple in Preconditions)
{
pw.Triple(triple);
}
preconditionsData.Close();
var jobId = _serverCore.ProcessTransaction(_storeName, preconditionsData.ToString(), deleteData.ToString(), addData.ToString(), UpdateGraphUri);
var status = _serverCore.GetJobStatus(_storeName, jobId.ToString());
while (!(status.JobStatus == JobStatus.CompletedOk || status.JobStatus == JobStatus.TransactionError))
{
// wait for completion.
#if !PORTABLE
Thread.Sleep(5);
#endif
status = _serverCore.GetJobStatus(_storeName, jobId.ToString());
}
if (status.JobStatus == JobStatus.TransactionError)
{
if (status.ExceptionDetail.Type.Equals(typeof(PreconditionFailedException).FullName))
{
var failedTriples =
status.ExceptionDetail.Message.Substring(status.ExceptionDetail.Message.IndexOf("\n") + 1);
Preconditions.Clear();
throw new TransactionPreconditionsFailedException(failedTriples);
}
throw new BrightstarClientException(status.ExceptionDetail != null && !String.IsNullOrEmpty(status.ExceptionDetail.Message) ? status.ExceptionDetail.Message : "The transaction encountered an error");
}
// reset changes
ResetTransactionData();
}
/// <summary>
/// Commits all changes. Waits for the operation to complete.
/// </summary>
protected override void DoSaveChanges()
{
if (_optimisticLockingEnabled)
{
// get subject entity and see if there is a version triple
var subjects = AddTriples.Select(x => x.Subject).Distinct().Union(DeletePatterns.Select(x => x.Subject).Distinct()).ToList();
foreach (var subject in subjects)
{
var entity = LookupDataObject(subject);
if (entity == null)
{
throw new BrightstarClientException("No Entity Found for Subject " + subject);
}
var version = entity.GetPropertyValue(Constants.VersionPredicateUri);
if (version == null)
{
// no existing version information so assume this is the first
entity.SetProperty(Constants.VersionPredicateUri, 1);
}
else
{
var intVersion = Convert.ToInt32(version);
// inc version
intVersion++;
entity.SetProperty(Constants.VersionPredicateUri, intVersion);
Preconditions.Add(new Triple {
Graph = Constants.DefaultGraphUri, DataType = RdfDatatypes.Integer, IsLiteral = true, LangCode = null, Object = version.ToString(), Predicate = Constants.VersionPredicateUri, Subject = subject
});
}
}
}
var deleteData = new StringWriter();
var dw = new BrightstarTripleSinkAdapter(new NTriplesWriter(deleteData));
foreach (Triple triple in DeletePatterns)
{
dw.Triple(triple);
}
deleteData.Close();
var addData = new StringWriter();
var aw = new BrightstarTripleSinkAdapter(new NTriplesWriter(addData));
foreach (Triple triple in AddTriples)
{
aw.Triple(triple);
}
addData.Close();
var preconditionsData = new StringWriter();
var pw = new BrightstarTripleSinkAdapter(new NTriplesWriter(preconditionsData));
foreach (var triple in Preconditions)
{
pw.Triple(triple);
}
preconditionsData.Close();
PostTransaction(preconditionsData.ToString(), deleteData.ToString(), addData.ToString());
// reset changes
ResetTransactionData();
}