public void Release(Scope scope, bool valid)
{
switch (Mode)
{
case PoolMode.None:
Queries.EndQuery(scope.Query, valid);
scope.Factory.Dispose();
break;
default:
if (valid && !scope.Query.InTransaction && Scopes.Count < Size)
{
Scopes.Add(scope);
}
else
{
Queries.EndQuery(scope.Query, valid);
scope.Factory.Dispose();
if (Scopes.Count < Size)
{
Scopes.Add(SetupReadonlyScope());
}
}
break;
}
}
/// <summary>
/// Rollback started transaction.
/// </summary>
/// <param name="manager">query manager</param>
/// <param name="query">ADO.NET driver</param>
public static void Rollback(this IDatabaseQueryManager manager, IDatabaseQuery query)
{
Contract.Requires(manager != null);
Contract.Requires(query != null);
if (!query.InTransaction)
{
throw new ArgumentException("Only queries in transaction can be rollbacked");
}
manager.EndQuery(query, false);
}
public IProcessingResult <TOutput> Execute <TInput, TOutput>(IServerCommandDescription <TInput>[] commandDescriptions)
{
if (commandDescriptions == null || commandDescriptions.Length == 0)
{
return
(ProcessingResult <TOutput> .Create(
"There are no commands to execute.",
HttpStatusCode.BadRequest,
null,
0));
}
var stopwatch = Stopwatch.StartNew();
foreach (var c in commandDescriptions)
{
if (!Permissions.CanAccess(c.CommandType))
{
Logger.Trace(
() => "Access denied. User: {0}. Target: {1}.".With(
Thread.CurrentPrincipal.Identity.Name,
c.CommandType.FullName));
return
(ProcessingResult <TOutput> .Create(
"You don't have permission to execute command: " + c.CommandType.FullName,
HttpStatusCode.Forbidden,
null,
stopwatch.ElapsedMilliseconds));
}
}
var inputSerializer = GetSerializer <TInput>();
var outputSerializer = GetSerializer <TOutput>();
var commands = new CommandInfo <TInput> [commandDescriptions.Length];
var useTransaction = false;
for (int i = 0; i < commands.Length; i++)
{
var c = commands[i] = new CommandInfo <TInput>(commandDescriptions[i], ActualCommands);
useTransaction = useTransaction || !c.IsReadOnly;
if (c.Target == null)
{
Logger.Trace(
() => "Unknown target. User: {0}. Target: {1}.".With(
Thread.CurrentPrincipal.Identity.Name,
commandDescriptions[i].CommandType.FullName));
return
(ProcessingResult <TOutput> .Create(
"Unknown command: {0}. Check if requested command is registered in the system".With(
c.Description.CommandType),
HttpStatusCode.BadRequest,
null,
stopwatch.ElapsedMilliseconds));
}
}
var scopeID = useTransaction ? Guid.NewGuid().ToString() : null;
using (var scope = ObjectFactory.CreateScope(scopeID))
{
var executedCommands = new List <ICommandResultDescription <TOutput> >(commandDescriptions.Length);
IDatabaseQuery query = null;
try
{
try
{
query = TransactionManager.StartQuery(useTransaction);
}
catch (Exception ex)
{
Logger.Error("Can't start query. Error: " + ex.ToString());
return(Exceptions.DebugMode
? ProcessingResult <TOutput> .Create(
ex.ToString(),
HttpStatusCode.ServiceUnavailable,
null,
stopwatch.ElapsedMilliseconds)
: ProcessingResult <TOutput> .Create(
"Unable to create database connection",
HttpStatusCode.ServiceUnavailable,
null,
stopwatch.ElapsedMilliseconds));
}
scope.RegisterInstance(query);
if (useTransaction)
{
scope.RegisterInstance <IEnumerable <IServerCommandDescription <TInput> > >(commandDescriptions);
scope.RegisterInstance <IEnumerable <ICommandResultDescription <TOutput> > >(executedCommands);
scope.RegisterType(typeof(ProcessingContext), typeof(IProcessingEngine), InstanceScope.Singleton);
}
foreach (var cmd in commands)
{
var result = cmd.GetCommand(scope).Execute(inputSerializer, outputSerializer, cmd.Description.Data);
if (result == null)
{
throw new FrameworkException("Result returned null for " + cmd.Target.FullName);
}
executedCommands.Add(CommandResultDescription <TOutput> .Create(cmd.Description.RequestID, result));
if ((int)result.Status >= 400)
{
TransactionManager.EndQuery(query, false);
return(ProcessingResult <TOutput> .Create(
result.Message,
result.Status,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
}
TransactionManager.EndQuery(query, true);
return
(ProcessingResult <TOutput> .Create(
"Commands executed in: " + stopwatch.ElapsedMilliseconds.ToString() + " ms.",
HttpStatusCode.OK,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
catch (SecurityException ex)
{
Logger.Trace(
() => "Security error. User: {0}. Error: {1}.".With(
Thread.CurrentPrincipal.Identity.Name,
ex.ToString()));
TransactionManager.EndQuery(query, false);
return
(ProcessingResult <TOutput> .Create(
"You don't have authorization to perform requested action: " + ex.Message,
HttpStatusCode.Forbidden,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
catch (AggregateException ex)
{
Logger.Trace(
() => "Multiple errors. User: {0}. Error: {1}.".With(
Thread.CurrentPrincipal.Identity.Name,
ex.GetDetailedExplanation()));
TransactionManager.EndQuery(query, false);
return(Exceptions.DebugMode
? ProcessingResult <TOutput> .Create(
ex.GetDetailedExplanation(),
HttpStatusCode.InternalServerError,
executedCommands,
stopwatch.ElapsedMilliseconds)
: ProcessingResult <TOutput> .Create(
string.Join(Environment.NewLine, ex.InnerExceptions.Select(it => it.Message)),
HttpStatusCode.InternalServerError,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
catch (OutOfMemoryException ex)
{
Logger.Error("Out of memory error. Error: " + ex.GetDetailedExplanation());
TransactionManager.EndQuery(query, false);
return(Exceptions.DebugMode
? ProcessingResult <TOutput> .Create(
ex.GetDetailedExplanation(),
HttpStatusCode.ServiceUnavailable,
executedCommands,
stopwatch.ElapsedMilliseconds)
: ProcessingResult <TOutput> .Create(
ex.Message,
HttpStatusCode.ServiceUnavailable,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
catch (Exception ex)
{
Logger.Trace(
() => "Unexpected error. User: {0}. Error: {1}.".With(
Thread.CurrentPrincipal.Identity.Name,
ex.GetDetailedExplanation()));
TransactionManager.EndQuery(query, false);
return(Exceptions.DebugMode
? ProcessingResult <TOutput> .Create(
ex.GetDetailedExplanation(),
HttpStatusCode.InternalServerError,
executedCommands,
stopwatch.ElapsedMilliseconds)
: ProcessingResult <TOutput> .Create(
ex.Message,
HttpStatusCode.InternalServerError,
executedCommands,
stopwatch.ElapsedMilliseconds));
}
}
}
