public static AssociationHelperResult BuildAssociationsToPrefetch(IAssociationPrefetcherRequest request, ApplicationSchemaDefinition schema)
{
var schemaAssociations = schema.GetProperty(ApplicationSchemaPropertiesCatalog.PreFetchAssociations);
var requestToFetch = request.AssociationsToFetch;
var result = new AssociationHelperResult();
var toFetch = new HashedSet <string>();
var toAvoid = new HashedSet <string>();
result.ToFetch = toFetch;
result.ToAvoid = toAvoid;
if (schemaAssociations == null && requestToFetch == null)
{
toFetch.AddReturn(None);
return(result);
}
if (All.Equals(schemaAssociations))
{
toFetch.Add(None.Equals(requestToFetch) ? None : All);
return(result);
}
if (All.Equals(requestToFetch))
{
toFetch.AddReturn(All);
return(result);
}
if (schemaAssociations != null)
{
toFetch.AddAll(schemaAssociations.Split(','));
if (AllButSchema.Equals(requestToFetch))
{
toAvoid.AddAll(schemaAssociations.Split(','));
}
}
if (requestToFetch != null)
{
toFetch.AddAll(requestToFetch.Split(','));
}
return(result);
}
//TODO: add locale,and format options
public IDictionary <string, BaseAssociationUpdateResult> BuildAssociationOptions(AttributeHolder dataMap, ApplicationMetadata application, IAssociationPrefetcherRequest request)
{
var associationsToFetch = AssociationHelper.BuildAssociationsToPrefetch(request, application.Schema);
if (associationsToFetch.IsNone)
{
return(new Dictionary <string, BaseAssociationUpdateResult>());
}
IDictionary <string, BaseAssociationUpdateResult> associationOptionsDictionary = new ConcurrentDictionary <string, BaseAssociationUpdateResult>();
var before = LoggingUtil.StartMeasuring(Log, "starting association options fetching for application {0} schema {1}", application.Name, application.Schema.Name);
var associations = application.Schema.Associations;
var tasks = new List <Task>();
var ctx = ContextLookuper.LookupContext();
#region associations
foreach (var applicationAssociation in associations)
{
if (!associationsToFetch.ShouldResolve(applicationAssociation.AssociationKey))
{
Log.Debug("ignoring association fetching: {0}".Fmt(applicationAssociation.AssociationKey));
continue;
}
//only resolve the association options for non lazy associations or lazy loaded with value set.
SearchRequestDto search;
if (!applicationAssociation.IsLazyLoaded())
{
search = new SearchRequestDto();
}
else if (dataMap != null && dataMap.GetAttribute(applicationAssociation.Target) != null)
{
//if the field has a value, fetch only this single element, for showing eventual extra label fields... ==> lookup with a selected value
search = new SearchRequestDto();
var toAttribute = applicationAssociation.EntityAssociation.PrimaryAttribute().To;
var prefilledValue = dataMap.GetAttribute(applicationAssociation.Target).ToString();
search.AppendSearchEntry(toAttribute, prefilledValue);
}
else
{
//lazy association with no default value
continue;
}
var association = applicationAssociation;
tasks.Add(Task.Factory.NewThread(c => {
//this will avoid that one thread impacts any other, for ex: changing metadataid of the query
var perThreadContext = ctx.ShallowCopy();
Quartz.Util.LogicalThreadContext.SetData("context", perThreadContext);
var associationOptions = _associationOptionResolver.ResolveOptions(application, dataMap, association, search);
associationOptionsDictionary.Add(association.AssociationKey, new BaseAssociationUpdateResult(associationOptions));
}, ctx));
}
#endregion
#region optionfields
foreach (var optionField in application.Schema.OptionFields)
{
if (!associationsToFetch.ShouldResolve(optionField.AssociationKey))
{
Log.Debug("ignoring association fetching: {0}".Fmt(optionField.AssociationKey));
continue;
}
if (optionField.ProviderAttribute == null)
{
//if there´s no provider, there´s nothing to do --> static list
continue;
}
var field = optionField;
tasks.Add(Task.Factory.NewThread(c => {
Quartz.Util.LogicalThreadContext.SetData("context", c);
var associationOptions = _dynamicOptionFieldResolver.ResolveOptions(application, field, dataMap);
if (associationOptionsDictionary.ContainsKey(field.AssociationKey))
{
associationOptionsDictionary.Remove(field.AssociationKey);
}
associationOptionsDictionary.Add(field.AssociationKey, new BaseAssociationUpdateResult(associationOptions));
}, ctx));
}
#endregion
Task.WaitAll(tasks.ToArray());
if (Log.IsDebugEnabled)
{
var keys = String.Join(",", associationOptionsDictionary.Keys.Where(k => associationOptionsDictionary[k].AssociationData != null));
Log.Debug(LoggingUtil.BaseDurationMessageFormat(before, "Finished execution of options fetching. Resolved collections: {0}", keys));
}
return(associationOptionsDictionary);
}
