Your theory is all right. It is CompiledCode's purpose to be executed many times against different scopes. CompiledCode.Execute is thread-safe provided that the script being executed and the scope storage are. The data-structures IronRuby and DLR use internally are thread-safe. If you use ScriptScope with default storage (you do so in the sample below) and if the script doesn't modify shared state not protected by a lock than everything should work just fine.
Tomas -----Original Message----- From: ironruby-core-boun...@rubyforge.org [mailto:ironruby-core-boun...@rubyforge.org] On Behalf Of Josh Flanagan Sent: Wednesday, May 26, 2010 3:12 PM To: ironruby-core@rubyforge.org Subject: [Ironruby-core] Hosting IronRuby/DLR in long running applications Following up on this discussion on ASP.NET: http://rubyforge.org/pipermail/ironruby-core/2010-February/006225.html We are considering hosting IronRuby in our application (ASP.NET website & a couple windows services). I am looking for any guidance around which objects should be cached, and what should be created on the fly. The responses from the previous thread seemed to suggest it is safe to cache the ScriptEngine. I'm wondering where else I might want to cache, and where I would NOT want to cache (if an object is not thread safe, and shouldn't be used to fulfill multiple simultaneous requests). Specifically, we are using IronRuby to provide some customization to the application. For (simplified) example, suppose we wanted to provide the ability to customize a greeting. I want to store the script that generates the greeting in the web.config (either the script itself, or the path to the script). My theory is that I can create a CompiledCode instance during application startup, and then execute the compiled code with different scopes for each request (to provide request-specific data). Is this the proper/recommended way of executing the same script with different data within an application? Is it safe to called CompiledCode.Execute from multiple threads simultaneously? Sample code that shows what I plan to do: // Perform all these steps in global.asax application_start var scriptFromConfigFile = @"""Hi #{ctx.first_name} #{ctx.last_name}"""; // read from web.config appSettings var scriptEngine = IronRuby.Ruby.CreateEngine(); //GreetingScript is cached as a singleton so that it is available to requests var GreetingScript = scriptEngine.CreateScriptSourceFromString(scriptFromConfigFile).Compile(); // during each individual web request, change the context object passed to the script var scriptScope = GreetingScript.Engine.CreateScope(); scriptScope.SetVariable("ctx", new {FirstName="John", LastName="Doe"}); var greeting = GreetingScript.Execute(scriptScope); Console.WriteLine(greeting); _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core
