CommandResult Handle(ITransaction transaction, ICommand command)
{
var commandResult = new CommandResult();
try
{
using (_localizer.BeginScope())
{
commandResult = CommandResult.ForCommand(command);
var authorizationResult = _commandSecurityManager.Authorize(command);
if (!authorizationResult.IsAuthorized)
{
commandResult.SecurityMessages = authorizationResult.BuildFailedAuthorizationMessages();
transaction.Rollback();
return commandResult;
}
var validationResult = _commandValidationService.Validate(command);
commandResult.ValidationResults = validationResult.ValidationResults;
commandResult.CommandValidationMessages = validationResult.CommandErrorMessages;
if (commandResult.Success)
{
try
{
_commandHandlerManager.Handle(command);
transaction.Commit();
}
catch (TargetInvocationException ex)
{
_exceptionPublisher.Publish(ex);
commandResult.Exception = ex.InnerException;
transaction.Rollback();
}
catch (Exception ex)
{
_exceptionPublisher.Publish(ex);
commandResult.Exception = ex;
transaction.Rollback();
}
}
else
{
transaction.Rollback();
}
}
}
catch (TargetInvocationException ex)
{
_exceptionPublisher.Publish(ex);
commandResult.Exception = ex.InnerException;
}
catch (Exception ex)
{
_exceptionPublisher.Publish(ex);
commandResult.Exception = ex;
}
return commandResult;
}
public static void FromCommandResult(this ModelStateDictionary modelStateDictionary, CommandResult commandResult, string exceptionErrorName)
{
if (commandResult.Invalid)
{
modelStateDictionary.AddToModelErrors(commandResult.ValidationResults);
}
else
{
modelStateDictionary.AddModelError(exceptionErrorName, commandResult.Exception.Message);
}
}
/// <summary>
/// Add command result information onto a <see cref="ModelStateDictionary"/>
/// </summary>
/// <param name="modelStateDictionary"><see cref="ModelStateDictionary"/> to add to</param>
/// <param name="commandResult"><see cref="CommandResult"/> to add from</param>
/// <param name="exceptionErrorName">Optional parameter for specifying a error name for the any exception, if not specified the error name will be the name of the exception</param>
public static void FromCommandResult(this ModelStateDictionary modelStateDictionary, CommandResult commandResult, string exceptionErrorName = null)
{
if (commandResult.Invalid)
{
modelStateDictionary.AddToModelErrors(commandResult.ValidationResults);
if( commandResult.CommandValidationMessages != null )
modelStateDictionary.AddToModelErrors(commandResult.CommandValidationMessages);
}
else
{
if (exceptionErrorName == null)
exceptionErrorName = commandResult.Exception.GetType().Name;
modelStateDictionary.AddModelError(exceptionErrorName, commandResult.Exception.Message);
}
}
/// <summary>
/// Merges this instance of a CommandResult with another
/// </summary>
/// <param name="commandResultToMerge">The <see cref="CommandResult"/> to merge with the current instance</param>
public void MergeWith(CommandResult commandResultToMerge)
{
if (Exception == null)
Exception = commandResultToMerge.Exception;
if (commandResultToMerge.ValidationResults == null)
return;
if (ValidationResults == null)
{
ValidationResults = commandResultToMerge.ValidationResults;
return;
}
var validationResults = ValidationResults.ToList();
validationResults.AddRange(commandResultToMerge.ValidationResults);
ValidationResults = validationResults.ToArray();
}
public CommandResult Handle(ICommand command)
{
var validationResults = new ObservableCollection<ValidationResult>();
var commandValidationMessages = new ObservableCollection<string>();
var commandResult = new CommandResult();
commandResult.CommandName = command.Name;
commandResult.ValidationResults = validationResults;
commandResult.CommandValidationMessages = commandValidationMessages;
if( !command.GetType().Equals(typeof(Command)) )
CopyPropertyValuesToParameters(command);
var descriptor = new CommandDescriptor
{
Id = Guid.NewGuid(),
Name = command.Name,
Command = _serializer.ToJson(command.Parameters),
GeneratedFrom = command.GetType().FullName
};
_commands[descriptor.Id] = command;
command.IsBusy = true;
command.IsProcessing = true;
_proxy.Handle(descriptor).ContinueWith(a =>
{
foreach (var commandValidationMessage in a.Result.CommandValidationMessages)
commandValidationMessages.Add(commandValidationMessage);
foreach (var validationResult in a.Result.ValidationResults)
validationResults.Add(validationResult);
commandResult.Exception = a.Result.Exception;
commandResult.ExceptionMessage = a.Result.ExceptionMessage;
command.IsBusy = false;
if( command is INotifyCommandResultsReceived )
((INotifyCommandResultsReceived)command).OnCommandResultsReceived(descriptor.Id, commandResult);
});
return commandResult;
}
public CommandResult Handle(ICommand command)
{
var validationResult = new ObservableCollection<ValidationResult>();
var commandValidationMessages = new ObservableCollection<string>();
var commandResult = new CommandResult();
commandResult.ValidationResults = validationResult;
commandResult.CommandValidationMessages = commandValidationMessages;
var client = new WebClient();
client.Headers[HttpRequestHeader.ContentType] = "application/json";
client.Encoding = Encoding.UTF8;
var source = Application.Current.Host.Source;
var url = string.Format("{0}://{1}{2}/CommandCoordinator/Handle",
source.Scheme,
source.Host,
source.Port == 80 ? string.Empty : ":" + source.Port);
dynamic parameters = new ExpandoObject();
dynamic commandDescriptor = new ExpandoObject();
commandDescriptor.Name = "TestCommand";
commandDescriptor.Command = _serializer.ToJson(new { });
parameters.commandDescriptor = _serializer.ToJson(commandDescriptor);
var json = _serializer.ToJson(parameters);
var uri = new Uri(url, UriKind.Absolute);
client.UploadStringAsync(uri, "POST", json);
client.UploadStringCompleted += (s, e) =>
{
var actualCommandResult = _serializer.FromJson<CommandResult>(e.Result);
var i = 0;
i++;
};
return commandResult;
}
/// <summary>
/// Merges another CommandResult instance into the current instance
/// </summary>
/// <param name="commandResultToMerge">The source <see cref="CommandResult"/> to merge into current instance</param>
public void MergeWith(CommandResult commandResultToMerge)
{
if (Exception == null)
Exception = commandResultToMerge.Exception;
MergeValidationResults(commandResultToMerge);
MergeCommandErrorMessages(commandResultToMerge);
}
void MergeCommandErrorMessages(CommandResult commandResultToMerge)
{
if (commandResultToMerge.CommandValidationMessages == null)
return;
if (CommandValidationMessages == null)
{
CommandValidationMessages = commandResultToMerge.CommandValidationMessages;
return;
}
var commandErrorMessages = CommandValidationMessages.ToList();
commandErrorMessages.AddRange(commandResultToMerge.CommandValidationMessages);
CommandValidationMessages = commandErrorMessages.ToArray();
}
void MergeValidationResults(CommandResult commandResultToMerge)
{
if (commandResultToMerge.ValidationResults == null)
return;
if (ValidationResults == null)
{
ValidationResults = commandResultToMerge.ValidationResults;
return;
}
var validationResults = ValidationResults.ToList();
validationResults.AddRange(commandResultToMerge.ValidationResults);
ValidationResults = validationResults.ToArray();
}
public void OnCommandResultsReceived(Guid commandContextId, CommandResult result)
{
if (CommandResultsReceived != null)
Deployment.Current.Dispatcher.BeginInvoke(() => CommandResultsReceived(commandContextId, result));
}