private void SyncGeneration(IDatabase db)
{
var generationKey = CacheNamespace.GetGenerationKey();
var serverGenerationValue = db.StringGet(generationKey);
var serverGeneration = Convert.ToInt64(serverGenerationValue);
var currentGeneration = CacheNamespace.GetGeneration();
// Generation was cleared by someone else (shouldn't happen).
if (serverGenerationValue.IsNullOrEmpty)
{
db.StringSetAsync(
key: generationKey,
value: currentGeneration,
// Only set if someone else doesn't jump in and set it first.
when: When.NotExists,
flags: CommandFlags.FireAndForget
);
log.InfoFormat("setting server generation ({0}) because it is empty", currentGeneration);
}
// Generation was lowered by someone else (shouldn't happen).
else if (serverGeneration < CacheNamespace.GetGeneration())
{
var transaction = db.CreateTransaction();
// Only set if someone else doesn't jump in and set it first.
transaction.AddCondition(Condition.StringEqual(generationKey, serverGeneration));
transaction.StringSetAsync(
key: generationKey,
value: CacheNamespace.GetGeneration(),
flags: CommandFlags.FireAndForget
);
// We don't need to worry about the result because we will
// already retry if we can't sync the generation.
transaction.ExecuteAsync(CommandFlags.FireAndForget);
log.InfoFormat("syncing server generation (server={0}, current={1})", serverGeneration, currentGeneration);
}
else
{
CacheNamespace.SetHigherGeneration(serverGeneration);
log.InfoFormat("syncing server generation (server={0}, current={1})", serverGeneration, currentGeneration);
}
}
public void AddAssembly(string assemblyName)
{
log.InfoFormat("Searching for mapped documents in assembly: {0}", assemblyName);
Assembly assembly;
try
{
assembly = Assembly.Load(assemblyName);
}
catch (Exception e)
{
throw new ValidatorConfigurationException("Could not add assembly " + assemblyName, e);
}
AddAssembly(assembly);
}
public RecordHierarchy GetRecordHierarchy(Entity entity)
{
_log.InfoFormat("Getting record hierarchy for entity record ({0}#{1})", entity.Name, entity.JoinedKeyWithValue);
var index = 0;
var hierarchy = GetEntityHierarchy(null, entity, ref index);
var sql = GenerateHierarchySql(hierarchy);
_log.DebugFormat("Sql hierarchy: \r\n {0}", sql);
var model = new DynamicModel(Admin.ConnectionStringName);
var records = model.Query(sql, entity.Key.Select(x => x.Value.Raw).ToArray()).ToList();
var recordHierarchy = GetHierarchyRecords(records, hierarchy);
return(recordHierarchy);
}
private static IEnumerable <System.Type> ClassesWithoutTopLevelSaveSupport(Configuration config)
{
foreach (PersistentClass classMapping in config.ClassMappings)
{
foreach (var property in classMapping.PropertyClosureIterator)
{
if (property.Value is OneToOne)
{
var mappedClass = classMapping.MappedClass;
Log.InfoFormat("Type {0} does not support top-level saves.", mappedClass.Name);
yield return(mappedClass);
break;
}
}
}
}
public virtual void OnMerge(MergeEvent @event)
{
EventCache copyCache = new EventCache();
OnMerge(@event, copyCache);
// transientCopyCache may contain parent and child entities in random order.
// Child entities occurring ahead of their respective transient parents may fail
// to get merged in one iteration.
// Retries are necessary as more and more children may be able to merge on subsequent iterations.
// Iteratively get transient entities and retry merge until one of the following conditions is true:
// 1) transientCopyCache.size() == 0
// 2) transientCopyCache.size() is not decreasing
// TODO: find out if retrying can add entities to copyCache (don't think it can...)
// For now, just retry once; throw TransientObjectException if there are still any transient entities
IDictionary transientCopyCache = this.GetTransientCopyCache(@event, copyCache);
while (transientCopyCache.Count > 0)
{
var initialTransientCount = transientCopyCache.Count;
RetryMergeTransientEntities(@event, transientCopyCache, copyCache);
// find any entities that are still transient after retry
transientCopyCache = this.GetTransientCopyCache(@event, copyCache);
// if a retry did nothing, the remaining transient entities
// cannot be merged due to references to other transient entities
// that are not part of the merge
if (transientCopyCache.Count == initialTransientCount)
{
ISet <string> transientEntityNames = new HashSet <string>();
foreach (object transientEntity in transientCopyCache.Keys)
{
string transientEntityName = @event.Session.GuessEntityName(transientEntity);
transientEntityNames.Add(transientEntityName);
log.InfoFormat(
"transient instance could not be processed by merge: {0} [{1}]",
transientEntityName,
transientEntity.ToString());
}
throw new TransientObjectException("one or more objects is an unsaved transient instance - save transient instance(s) before merging: " + String.Join(",", transientEntityNames.ToArray()));
}
}
copyCache.Clear();
}
public RecordHierarchy GetRecordHierarchy(
EntityRecord entityRecord,
IList <PropertyDeleteOption> deleteOptions = null)
{
_log.InfoFormat(
"Getting record hierarchy for entity record ({0}#{1})",
entityRecord.Entity.Name,
entityRecord.JoinedKeysWithNames);
var hierarchy = GetEntityHierarchy(entityRecord.Entity, deleteOptions);
var sql = GenerateHierarchySql(hierarchy);
_log.Debug($"Sql hierarchy: \r\n {sql}");
var model = new DynamicModel(_admin.ConnectionStringName);
var records = model.Query(sql, entityRecord.Keys.Select(x => x.Raw).ToArray()).ToList();
var recordHierarchy = GetHierarchyRecords(records, hierarchy);
return(recordHierarchy);
}
public virtual void OnMerge(MergeEvent @event)
{
EventCache copyCache = new EventCache();
OnMerge(@event, copyCache);
// TODO: iteratively get transient entities and retry merge until one of the following conditions:
// 1) transientCopyCache.size() == 0
// 2) transientCopyCache.size() is not decreasing and copyCache.size() is not increasing
// TODO: find out if retrying can add entities to copyCache (don't think it can...)
// For now, just retry once; throw TransientObjectException if there are still any transient entities
IDictionary transientCopyCache = this.GetTransientCopyCache(@event, copyCache);
if (transientCopyCache.Count > 0)
{
RetryMergeTransientEntities(@event, transientCopyCache, copyCache);
// find any entities that are still transient after retry
transientCopyCache = this.GetTransientCopyCache(@event, copyCache);
if (transientCopyCache.Count > 0)
{
ISet <string> transientEntityNames = new HashedSet <string>();
foreach (object transientEntity in transientCopyCache.Keys)
{
string transientEntityName = @event.Session.GuessEntityName(transientEntity);
transientEntityNames.Add(transientEntityName);
log.InfoFormat(
"transient instance could not be processed by merge: {0} [{1}]",
transientEntityName,
transientEntity.ToString());
}
throw new TransientObjectException("one or more objects is an unsaved transient instance - save transient instance(s) before merging: " + transientEntityNames);
}
}
copyCache.Clear();
copyCache = null;
}
private static object[] postUpdateDbState(PostUpdateEvent evt)
{
var newDbState = (object[])evt.State.Clone();
var entityPersister = evt.Persister;
var oldState = evt.OldState;
if (oldState == null)
{
log.InfoFormat("Using current state when persisting detached {0}. This can result in incorrect audit data if non updatable property(ies) are used.", entityPersister.EntityName);
return(newDbState);
}
for (var i = 0; i < entityPersister.PropertyNames.Length; i++)
{
if (!entityPersister.PropertyUpdateability[i])
{
// Assuming that PostUpdateEvent#getOldState() returns database state of the record before modification.
// Otherwise, we would have to execute SQL query to be sure of @Column(updatable = false) column value.
// For now, we're in that case returning newdbstate above which (potentially) result in corrupt audit state for update=false properties
newDbState[i] = oldState[i];
}
}
return(newDbState);
}
public void Log(NHibernateLogLevel logLevel, NHibernateLogValues state, Exception exception)
{
if (!IsEnabled(logLevel))
{
return;
}
switch (logLevel)
{
case NHibernateLogLevel.Debug:
case NHibernateLogLevel.Trace:
if (exception != null)
{
_internalLogger.Debug(state, exception);
}
else if (state.Args?.Length > 0)
{
_internalLogger.DebugFormat(state.Format, state.Args);
}
else
{
_internalLogger.Debug(state);
}
break;
case NHibernateLogLevel.Info:
if (exception != null)
{
_internalLogger.Info(state, exception);
}
else if (state.Args?.Length > 0)
{
_internalLogger.InfoFormat(state.Format, state.Args);
}
else
{
_internalLogger.Info(state);
}
break;
case NHibernateLogLevel.Warn:
if (exception != null)
{
_internalLogger.Warn(state, exception);
}
else if (state.Args?.Length > 0)
{
_internalLogger.WarnFormat(state.Format, state.Args);
}
else
{
_internalLogger.Warn(state);
}
break;
case NHibernateLogLevel.Error:
if (exception != null)
{
_internalLogger.Error(state, exception);
}
else if (state.Args?.Length > 0)
{
_internalLogger.ErrorFormat(state.Format, state.Args);
}
else
{
_internalLogger.Error(state);
}
break;
case NHibernateLogLevel.Fatal:
if (exception != null)
{
_internalLogger.Fatal(state, exception);
}
else
{
_internalLogger.Fatal(state);
}
break;
case NHibernateLogLevel.None:
break;
default:
throw new ArgumentOutOfRangeException(nameof(logLevel), logLevel, null);
}
}
