// Constructors
public PersistRequestBuilderContext(PersistRequestBuilderTask task, ModelMapping mapping, NodeConfiguration nodeConfiguration)
{
Task = task;
Type = task.Type;
Mapping = mapping;
NodeConfiguration = nodeConfiguration;
var affectedIndexes = Type.AffectedIndexes.Where(index => index.IsPrimary).ToList();
affectedIndexes.Sort((left, right) => {
if (left.ReflectedType.GetAncestors().Contains(right.ReflectedType))
{
return(1);
}
if (right.ReflectedType.GetAncestors().Contains(left.ReflectedType))
{
return(-1);
}
return(0);
});
AffectedIndexes = new ReadOnlyList <IndexInfo>(affectedIndexes);
PrimaryIndex = Task.Type.Indexes.PrimaryIndex;
ParameterBindings = new Dictionary <ColumnInfo, PersistParameterBinding>();
if (task.ValidateVersion)
{
VersionParameterBindings = new Dictionary <ColumnInfo, PersistParameterBinding>();
}
}
private SqlPersistTask CreateInsertTask(PersistAction action)
{
var entityState = action.EntityState;
var tuple = entityState.Tuple.ToRegular();
var request = GetOrBuildRequest(action.Node, PersistRequestBuilderTask.Insert(entityState.Type));
return(new SqlPersistTask(entityState.Key, request, tuple));
}
private ICollection <PersistRequest> GetOrBuildRequest(StorageNode node, PersistRequestBuilderTask task)
{
var cache = node.PersistRequestCache;
ICollection <PersistRequest> result;
if (cache.TryGetValue(task, out result))
{
return(result);
}
result = requestBuilder.Build(node, task);
return(cache.TryAdd(task, result) ? result : cache[task]);
}
internal ICollection <PersistRequest> Build(StorageNode node, PersistRequestBuilderTask task)
{
var context = new PersistRequestBuilderContext(task, node.Mapping, node.Configuration);
List <PersistRequest> result;
switch (task.Kind)
{
case PersistRequestKind.Insert:
result = BuildInsertRequest(context);
break;
case PersistRequestKind.Remove:
result = BuildRemoveRequest(context);
break;
case PersistRequestKind.Update:
result = BuildUpdateRequest(context);
break;
default:
throw new ArgumentOutOfRangeException("task.Kind");
}
// Merging requests for servers which support batching
// unless version validation is requested.
if (providerInfo.Supports(ProviderFeatures.Batches) && result.Count > 1 && !task.ValidateVersion)
{
var batch = SqlDml.Batch();
var bindings = new HashSet <PersistParameterBinding>();
foreach (var request in result)
{
batch.Add(request.Statement);
bindings.UnionWith(request.ParameterBindings);
}
var batchRequest = CreatePersistRequest(batch, bindings, node.Configuration);
batchRequest.Prepare();
return(new List <PersistRequest> {
batchRequest
}.AsReadOnly());
}
foreach (var item in result)
{
item.Prepare();
}
return(result.AsReadOnly());
}
private SqlPersistTask CreateRemoveTask(PersistAction action, bool validateVersion)
{
var entityState = action.EntityState;
var tuple = entityState.Key.Value;
if (validateVersion)
{
var versionTuple = entityState.DifferentialTuple.Origin.ToRegular();
var availableFields = versionTuple.GetFieldStateMap(TupleFieldState.Available);
var request = GetOrBuildRequest(action.Node,
PersistRequestBuilderTask.RemoveWithVersionCheck(entityState.Type, availableFields));
return(new SqlPersistTask(entityState.Key, request, tuple, versionTuple, true));
}
else
{
var request = GetOrBuildRequest(action.Node, PersistRequestBuilderTask.Remove(entityState.Type));
return(new SqlPersistTask(entityState.Key, request, tuple));
}
}
