Re: [xml-dev] Using XML (or JSON) for inter-thread communication

["Pete Cordell" <petexmldev@codalogic.com>]

Original Message From: "John Cowan"

> All that parsing and unparsing would be expensive:

That was certainly one of my concerns, does it scale (unscale?!) to the 
tiny?  If the cost of serialization is small compared to the number of cores 
you can throw at a problem then it might cost in.  These days that's 
probably an accessment you have to make on a daily basis!

> you might as well deal
> in binary immutable objects instead.  But otherwise the idea is good and
> has been in use for decades (Unix pipelines being the best-known example).
> The key is to share nothing except immutable objects.

I was thinking the act of serialization could be used to enforce the 
immutability aspects and reduce the changes of unintentionally getting 
access to 'foreign' mutating state.

> See Flow-Based Programming, a framework based on passing around immutable
> packets between components (there are Java, C#, and C++ versions) at
> http://www.jpaulmorrison.com/fbp/ .

Will do, Thanks.

Pete Cordell
Codalogic Ltd
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