• Ridley Scott's Kingdom of Heaven is a rather belated attempt to capitalize on the "psuedo-historical epos" trend of the last few years which was ironically started by Scott's own Gladiator (in case you were wondering, Braveheart was not a little too early for its own good, having come out in 1995). Synopsis: Balian, the son of Lord Godfrey, is knighted, takes up the task of defending Jerusalem from the forces of Saladin and ends up saving the day etc. Throw in a bunch of clichés about love, what it takes to be a humane leader back in the crusades and some generic morality crap and you've got a seriously badly written film. In its defense it does feature some superb photography, OK action and a huge cast consisting of some favourite actors of mine: Orlando Bloom (who finally appars capable of acting), Alexander Siddig (of DS9 fame), Brendan Gleeson, Jeremy Irons, Edward Norton (who does not appear visually), David Thewlis and finally Liam Neeson, who isn't actually on my list but does deserve a mention. Too bad the movie just plain sucked.
• Nicolas Cage's latest movie Lord of War was an absolute blast. It is an amasingly cynical, mostly funny and quite surprising satire of what makes third world countries wage war, as well as what makes greedy people tick. It doesn't make any excuses for the clichés it employs, and in my opinion it hits the spot precisely: some messages simply do not come across until you bang them into someone's head with an allegorical hammer. My only issue with it is that it fails to keep the satire simply as that, and culminates in a verbal political message which is an exercise in redundancy.
• Instead of making a long point I'll skip to the very end with a summary of The Exorcism of Emily Rose: good acting (particularly by Laura Linney and Tom Wilkinson), reasonable dialog, crappy predictable storyline and no boobs at all. In short, a movie not worth your time; if you're interested in the legal/judicial aspects do yourself a favour and go watch Law & Order, it's what they do.
• I've heard a lot of conflicting opinions on I, Robot. Maddox went as far as to say:

  Here's how I would have changed this film: start out with a shot of Will Smith in a grocery store buying a 6 pack of Dos Equis beer, except instead of paying, the cashier is a Dos Equis marketing rep who hands Smith a thick wad of bills. Next shot: Smith finishes the last of the beer, walks over to Isaac Asimov's grave and lets loose. Why not? Same message, none of the bullshit.

  I won't deny that this movie has some serious issues (particularly with product placements; here it was even worse than The Island, if that's even possible) but I would take an opposite view to Maddox's: I enjoyed the movie immensely. Having read the book quite recently I find that the only place where the movie deviated completely from what is detailed in the stories (because I, Robot is not a single coherent storyline, rather comprised of several short tales) is in the depiction of Susan Calvin's character, who is actually very true-to-form in the beginning of the movie. Regardless, the movie features rather imaginative photography, some great action sequences, a plot which ultimately doesn't suck and some of the funniest dialogue I've heard in years (the only competition comes from the underrated Constantine). Bottom line? Recommended.

Update (27/11/2005, 15:40): After putting the remote logging framework to use on an actual commercial project I've found that the hack I used for mapping a method to its concrete (nonvirtual) implementation wasn't working properly for explicit interface implementations. One horrible hack (which fortunately never saw the light of day) and a little digging later I've come across a useful trick on Andy Smith's weblog and added some special code to handle interfaces. The new version is available from the download section.

As part of the ongoing project I'm working on I was asked to implement a sort of macro recording feature into the product engine. The "keyboard" (as it were) is implemented as an abstract, remotable CAO interface which is registered in the engine via a singleton factory. I figured that the easiest way to record a macro would be to save a list of all remoting calls from when recording begins to when recording ends; the simplest way would be to add code to the beginning of every remote method implementation to save the call and its parameters. Obviously, that is an ugly solution.

About a year ago when I was working on a different project (a web-service back end for what would hopefully become a very popular statistics-gathering service) I faced a similar issue: the QA guys asked for a log of every single Web Service method call for performance and usability analysis. At the time I implemented this as a SOAP extension which infers some details using Reflection and saves everything to a specific log (via log4net). A couple of hours of research, 30 minutes of coding and I was done - the code even worked on the first try! - which only served to boost my confidence in my choice of frameworks for this project. My point is, I figured I would do something along the same lines for this project, and went on to do some research.

If you're just interested in the class library and instuctions skip to instructions or download.

I eventually settled on writing a Remoting server channel sink to do the work for me. I'll save you the nitty-gritty details; suffice to say that the entire process of Remoting sink providers is not trivial and not in any way sufficiently documented. There are some examples around the internet and even a pretty impressive article by Motti Shaked which proved useful, but didn't solve my problem. I eventually got to the point where I could, for a given type, say which methods on that type were invoked via Remoting and with which parameters, but I couldn't tell the object instance for which they were invoked no matter what. A sink may access the IMethodMessage interface which gives you a wealth of information, including arguments, the MethodBase for the method call etc., but the only indication of which object is actually being called is its URI (the interface's Uri property). Unfortunately I couldn't find any way of mapping a URI back to its ObjRef (something like the opposite of RemotingServices.GetObjectUri), only its type.

After a long period of frustrating research and diving into CLR implementation with the use of Reflector I came to the conclusion that the only way to convert the URI back to an object (outside of messing with framework internals via Reflection) would be to implement ITrackingHandler and maintain a URI-object cache. Another annoying hurdle was that the framework internally adds an application ID to its URIs and forwards the calls accordingly; for example, connecting to a server at URI tcp://localhost:1234/test would in fact connect to the object at local URI /3f4fd025_377a_4fda_8d50_2b76f0494d52/test. It took a bit of further digging to find out that this application ID is available in the property RemotingConfiguration.ApplicationID (obvious in retrospect, but there was nothing to point me in the right direction), which allowed me to normalize the incoming URIs and match them to the cache.

Finally, inferring virtual method implementations and URI server types are relatively costly operations, so I've added a caching mechanism for both in order to cut down on the performance loss. I haven't benchmarked this solution, but I believe the performance hit after the first method call should be negligible compared to "regular" remoting calls.

Obviously the first thing to do would be to download the source and add a reference to the class library. I've built and tested it with Visual Studio 2003; I'm pretty confident that it would work well with 2005 RTM, and probably not work with 1.0 or Mono (although I would be delighted to find out otherwise, if anyone bothers to check...)

Next you must configure Remoting to actually make use of the new provider. You would probably want the logging sink provider as the last provider in the server chain (meaning just before actual invocation takes place); if you're configuring Remoting via a configuration file, this is very easy:

Doing it programmatically is slightly less trivial but certainly possible:

Now it is time to decide which types and/or methods get logged. Do this by attaching a [LogRemoteCall] attribute; you can use this attribute with classes (which would log all method calls made to instances of that class) or with specific methods:

Next you should implement IRemoteLoggingConsumer:

Finally you must register with the remote call logging framework via RemoteLoggingServices.Register. You can register as many consumers as you like; moreover, each consumer can be set to receive notification for all remotable types (for generic logging) or a particular type (for example, macro recording as outlined above).

Download