public void ApplyTransaction(IList<Triple> preconditions, IList<Triple> deletePatterns, IList<Triple> inserts,
string updateGraphUri )
{
var deleteData = new StringWriter();
var dw = new BrightstarTripleSinkAdapter(new NQuadsWriter(deleteData, updateGraphUri));
foreach (Triple triple in deletePatterns)
{
dw.Triple(triple);
}
deleteData.Close();
var addData = new StringWriter();
var aw = new BrightstarTripleSinkAdapter(new NQuadsWriter(addData, updateGraphUri));
foreach (Triple triple in inserts)
{
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();
PostTransaction(preconditionsData.ToString(), deleteData.ToString(), addData.ToString(), updateGraphUri);
}
private static string SerializeTriples(IEnumerable<Triple> triples)
{
if (triples == null) return string.Empty;
using (var writer = new StringWriter())
{
var sink = new BrightstarTripleSinkAdapter(new NQuadsWriter(writer));
foreach(var t in triples) sink.Triple(t);
writer.Close();
return writer.ToString();
}
}
/// <summary>
/// Exports all triples to the stream provided
/// </summary>
/// <param name="store">The store to export triples from </param>
/// <param name="output">The stream to write the triples to</param>
/// <param name="graphs">OPTIONAL: The URIs of the graph(s) to be exported. Pass NULL to export all graphs</param>
public static void Export(this IStore store, Stream output, IEnumerable<string> graphs = null)
{
IEnumerable<Triple> triples = store.Match(null, null, null, graphs: graphs);
using (var sw = new StreamWriter(output))
{
var ntripleWriter = new BrightstarTripleSinkAdapter(new NTriplesWriter(sw));
foreach (Triple triple in triples)
{
ntripleWriter.Triple(triple);
}
sw.Flush();
}
}
private static void RunExport(object jobData)
{
var exportJob = jobData as ExportJob;
if (exportJob == null) return;
try
{
var storeDirectory = exportJob._storeWorker.WriteStore.DirectoryPath;
var exportDirectory = Path.Combine(Path.GetDirectoryName(storeDirectory), "import");
#if PORTABLE
var persistenceManager = PlatformAdapter.Resolve<IPersistenceManager>();
if (!persistenceManager.DirectoryExists(exportDirectory)) persistenceManager.CreateDirectory(exportDirectory);
var filePath = Path.Combine(exportDirectory, exportJob._outputFileName);
using (var stream = persistenceManager.GetOutputStream(filePath, FileMode.Create))
#else
if (!Directory.Exists(exportDirectory)) Directory.CreateDirectory(exportDirectory);
var filePath = Path.Combine(exportDirectory, exportJob._outputFileName);
Logging.LogDebug("Export file path calculated as '{0}'", filePath);
using (var stream = File.Open(filePath, FileMode.Create, FileAccess.Write))
#endif
{
string[] graphs = String.IsNullOrEmpty(exportJob._graphUri)
? null
: new[] {exportJob._graphUri};
var triples = exportJob._storeWorker.ReadStore.Match(null, null, null, graphs:graphs);
var sw = new StreamWriter(stream);
var sink = GetWriterSink(exportJob._exportFormat, sw);
var nw = new BrightstarTripleSinkAdapter(sink);
foreach (var triple in triples)
{
nw.Triple(triple);
}
sink.Close();
sw.Flush();
#if !PORTABLE
stream.Flush(true);
stream.Close();
#endif
}
exportJob._successCallback(exportJob._jobId);
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.ExportDataError, "Error Exporting Data {0} {1}", ex.Message, ex.StackTrace);
exportJob._errorCallback(exportJob._jobId, ex);
}
}
private static void RunExport(object jobData)
{
var exportJob = jobData as ExportJob;
if (exportJob == null) return;
try
{
var storeDirectory = exportJob._storeWorker.WriteStore.DirectoryPath;
var exportDirectory = Path.Combine(storeDirectory, ".." + Path.DirectorySeparatorChar + "import");
if (!Directory.Exists(exportDirectory)) Directory.CreateDirectory(exportDirectory);
var filePath = Path.Combine(exportDirectory, exportJob._outputFileName);
Logging.LogDebug("Export file path calculated as '{0}'", filePath);
using (var stream = File.Open(filePath, FileMode.Create, FileAccess.Write))
{
string[] graphs = String.IsNullOrEmpty(exportJob._graphUri)
? null
: new[] {exportJob._graphUri};
var triples = exportJob._storeWorker.ReadStore.Match(null, null, null, graphs:graphs);
var sw = new StreamWriter(stream);
var nw = new BrightstarTripleSinkAdapter(new NTriplesWriter(sw));
foreach (var triple in triples)
{
nw.Triple(triple);
}
sw.Flush();
stream.Flush(true);
stream.Close();
}
exportJob._successCallback(exportJob._jobId);
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.ExportDataError, "Error Exporting Data {0} {1}", ex.Message, ex.StackTrace);
exportJob._errorCallback(exportJob._jobId, ex);
}
}
/// <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);
}
// todo: fix me and report inner exception
throw new BrightstarClientException(status.ExceptionDetail != null ? 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();
}
/// <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.Subjects
.Union(DeletePatterns.Subjects)
.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));
foreach (var triple in DeletePatterns.Items)
{
dw.Triple(triple);
}
deleteData.Close();
var addData = new StringWriter();
var aw = new BrightstarTripleSinkAdapter(new NQuadsWriter(addData));
foreach (var triple in AddTriples.Items)
{
aw.Triple(triple);
}
addData.Close();
var preconditionsData = new StringWriter();
var pw = new BrightstarTripleSinkAdapter(new NQuadsWriter(preconditionsData));
foreach (var triple in Preconditions.Items)
{
pw.Triple(triple);
}
preconditionsData.Close();
var nePreconditionsData = new StringWriter();
var nw = new BrightstarTripleSinkAdapter(new NQuadsWriter(nePreconditionsData));
foreach (var triple in NonExistencePreconditions.Items)
{
nw.Triple(triple);
}
nePreconditionsData.Close();
var jobId = _serverCore.ProcessTransaction(_storeName, preconditionsData.ToString(),
nePreconditionsData.ToString(),
deleteData.ToString(), addData.ToString(), UpdateGraphUri);
var status = _serverCore.GetJobStatus(_storeName, jobId.ToString());
status.WaitEvent.WaitOne();
// 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))
{
Preconditions.Clear();
throw TransactionPreconditionsFailedException.FromExceptionDetail(status.ExceptionDetail);
}
throw new BrightstarClientException(status.ExceptionDetail != null && !String.IsNullOrEmpty(status.ExceptionDetail.Message) ? status.ExceptionDetail.Message : "The transaction encountered an error");
}
if (status.JobStatus != JobStatus.CompletedOk)
{
throw new BrightstarClientException("Unexpected job status on completion: " + status.JobStatus + ". Last message was: " + status.Information);
}
// reset changes
ResetTransactionData();
}
public void ExportData(Stream stream, string graphUri)
{
try
{
var triples = ReadStore.Match(null, null, null, graph: graphUri);
using (var sw = new StreamWriter(stream))
{
var nw = new BrightstarTripleSinkAdapter(new NTriplesWriter(sw));
foreach (var triple in triples)
{
nw.Triple(triple);
}
sw.Flush();
}
}
catch (ReadWriteStoreModifiedException)
{
Logging.LogError(BrightstarEventId.ExportDataError, "Store was modified while export was running.");
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.ExportDataError, "Error Exporting Data {0} {1}", ex.Message,
ex.StackTrace);
}
}