/// <summary>
/// Clear global merge candidates
/// </summary>
public override void ClearGlobalMergeCanadidates()
{
try
{
this.m_pepService.Demand(MdmPermissionPolicyIdentifiers.UnrestrictedMdm);
this.m_tracer.TraceInfo("Clearing MDM merge candidates...");
// TODO: When the persistence refactor is done - change this to use the bulk method
var classKeys = typeof(TEntity).GetCustomAttributes <ClassConceptKeyAttribute>(false).Select(o => Guid.Parse(o.ClassConcept));
Expression <Func <EntityRelationship, bool> > purgeExpression = o => classKeys.Contains(o.SourceEntity.ClassConceptKey.Value) && o.RelationshipTypeKey == MdmConstants.CandidateLocalRelationship && o.ClassificationKey == MdmConstants.AutomagicClassification && o.ObsoleteVersionSequenceId == null;
int offset = 0, totalResults = 1, batchSize = 500;
var uuid = Guid.NewGuid();
// Delete thread
using (var fetchEvent = new ManualResetEventSlim(false))
{
ConcurrentQueue <EntityRelationship> fetchQueue = new ConcurrentQueue <EntityRelationship>();
bool completeProcessing = false;
this.m_threadPool.QueueUserWorkItem(_ =>
{
int idx = 0, complete = 0;
var processList = new EntityRelationship[25];
while (!completeProcessing && !this.m_disposed)
{
fetchEvent.Wait(1000);
while (fetchQueue.TryDequeue(out var erd))
{
processList[idx++] = erd;
if (idx == processList.Length)
{
try
{
this.ProgressChanged?.Invoke(this, new ProgressChangedEventArgs((float)complete / (float)totalResults, $"Clearing Candidates ({complete} of {totalResults})"));
var batch = new Bundle(processList.Select(o => { o.BatchOperation = BatchOperationType.Delete; return(o); }));
this.m_batchPersistence.Update(batch, TransactionMode.Commit, AuthenticationContext.SystemPrincipal);
complete += processList.Length;
}
catch (Exception e)
{
this.m_tracer.TraceWarning("Error updating candidate clear - {0}", e.Message);
}
idx = 0;
}
}
fetchEvent.Reset();
}
});
while (offset < totalResults)
{
foreach (var er in this.m_relationshipPersistence.QueryFast(purgeExpression, uuid, offset, batchSize, out totalResults, AuthenticationContext.SystemPrincipal))
{
fetchQueue.Enqueue(er);
}
fetchEvent.Set();
offset += batchSize;
}
completeProcessing = true; // requeest termination
while (!fetchQueue.IsEmpty)
{
Thread.Sleep(1000);
}
// Now purge them
if (this.m_relationshipPersistence is IBulkDataPersistenceService ibps)
{
purgeExpression = o => (o.RelationshipTypeKey == MdmConstants.CandidateLocalRelationship || o.RelationshipTypeKey == MdmConstants.IgnoreCandidateRelationship || o.RelationshipTypeKey == MdmConstants.MasterRecordRelationship) && o.ObsoleteVersionSequenceId != null;
ibps.Purge(TransactionMode.Commit, AuthenticationContext.SystemPrincipal, purgeExpression);
}
}
}
catch (Exception e)
{
this.m_tracer.TraceError("Error clearing MDM merge candidates: {0}", e);
throw new MdmException("Error clearing MDM merge candidates", e);
}
}
