public override T Execute <T>(ICommand <T> command)
{
CommandContext context = null;
if (!AlwaysOpenNew)
{
// check whether we can reuse the command context
var existingCommandContext = Context.CommandContext;
if ((existingCommandContext != null) && IsFromSameEngine(existingCommandContext))
{
context = existingCommandContext;
}
}
var openNew = context == null;
var commandObj = command as ICommand <object>;
var commandInvocationContext = new CommandInvocationContext(commandObj);
Context.CommandInvocationContext = commandInvocationContext;
try
{
if (openNew)
{
Log.DebugOpeningNewCommandContext();
context = CommandContextFactory.CreateCommandContext();
}
else
{
Log.DebugReusingExistingCommandContext();
}
Context.CommandContext = context;
Context.ProcessEngineConfiguration = ProcessEngineConfiguration;
// delegate to next interceptor in chain
return(Next.Execute(command));
}
//// 取消catch 方便debug
catch (System.Exception e)
{
commandInvocationContext.TrySetThrowable(e);
throw;
}
finally
{
try
{
if (openNew)
{
Log.ClosingCommandContext();
context.Close(commandInvocationContext);
}
else
{
commandInvocationContext.Rethrow();
}
}
finally
{
Context.RemoveCommandInvocationContext();
Context.RemoveCommandContext();
Context.RemoveProcessEngineConfiguration();
}
}
}