private void OnJobCompleted(object sender, JobCompletedEventArgs e)
{
var jobStatus = _serverCore.GetJobStatus(e.StoreId, e.CompletedJob.JobId.ToString());
if (jobStatus != null && jobStatus.JobStatus == JobStatus.TransactionError)
{
// Because all transactions should be processable, this indicates a hardware problem or persistent software problem
_serverCore.Shutdown(true);
_state = CoreState.Broken;
}
_storeInfo[e.StoreId].Commit(e.CompletedJob.JobId);
}
/// <summary>
/// Execute an update transaction.
/// </summary>
/// <param name="storeName">The name of the store to modify</param>
/// <param name="preconditions">NTriples that must be in the store in order for the transaction to execute</param>
/// <param name="deletePatterns">The delete patterns that will be removed from the store</param>
/// <param name="insertData">The NTriples data that will be inserted into the store.</param>
/// <param name="waitForCompletion">If set to true the method will block until the transaction completes</param>
/// <returns>Job Info</returns>
public IJobInfo ExecuteTransaction(string storeName, string preconditions, string deletePatterns, string insertData, bool waitForCompletion = true)
{
try
{
if (!waitForCompletion)
{
var jobId = _serverCore.ProcessTransaction(storeName, preconditions, deletePatterns, insertData);
return(new JobInfoWrapper(new JobInfo {
JobId = jobId.ToString(), JobPending = true
}));
}
else
{
var jobId = _serverCore.ProcessTransaction(storeName, preconditions, deletePatterns, insertData);
JobExecutionStatus status = _serverCore.GetJobStatus(storeName, jobId.ToString());
while (status.JobStatus != JobStatus.CompletedOk && status.JobStatus != JobStatus.TransactionError)
{
Thread.Sleep(50);
status = _serverCore.GetJobStatus(storeName, jobId.ToString());
}
return(new JobInfoWrapper(new JobInfo
{
JobId = jobId.ToString(),
StatusMessage = status.Information,
JobCompletedOk = (status.JobStatus == JobStatus.CompletedOk),
JobCompletedWithErrors =
(status.JobStatus == JobStatus.TransactionError)
}));
}
}
catch (Exception ex)
{
Logging.LogError(BrightstarEventId.ServerCoreException, "Error Queing Transaction {0} {1} {2}", storeName, deletePatterns, insertData);
throw new BrightstarClientException("Error queing transaction in store " + storeName + ". " + ex.Message, 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.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();
}
/// <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 time using it with OL
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 (var triple in DeletePatterns)
{
dw.Triple(triple);
}
deleteData.Close();
var addData = new StringWriter();
var aw = new BrightstarTripleSinkAdapter(new NTriplesWriter(addData));
foreach (var 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();
var jobId = _serverCore.ProcessTransaction(_storeName, preconditionsData.ToString(), deleteData.ToString(), addData.ToString());
var status = _serverCore.GetJobStatus(_storeName, jobId.ToString());
while (!(status.JobStatus == JobStatus.CompletedOk || status.JobStatus == JobStatus.TransactionError))
{
// wait for completion.
Thread.Sleep(5);
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();
}
