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copied!<p>A practical answer may be impossible, but I can see where you would have a composition of chains of responsibility. Here's a pythonish example:</p> <pre><code>>>> class DevelopmentPerformanceMonitor(): ... def getPerformanceMonitorHandlers(): ... return [] ... >>> class ProductionPerformanceMonitor(): ... def getPerformanceMonitorHandlers(): ... return [check_cpu_under_load, check_available_hd] ... >>> class DevelopmentExceptionMonitor(): ... def getExceptionHandlers(): ... return [email_local_root, log_exception] ... >>> class ProductionExceptionMonitor(): ... def getExceptionHandlers(): ... return [emails_system_admin, log_exception, create_ticket] ... >>> class SomeSystem: ... pm = None # Performance Monitor ... em = None # Exception Monitor ... def __init__(self, performance_monitor, exception_monitor): ... pm = performance_monitor ... em = exception_monitor ... def on_exception(e): ... for handler in em.getExceptionHandlers(): ... handler(e) ... def perform_performance_monitoring(s): ... for handler in pm.getPerformanceMonitorHandlers(): ... handler(s) </code></pre> <p>So the SomeSystem object is a composite of a performance_monitor and an exception_monitor. Each of the composites will return a series of handlers for desired chain of responsibility. Although this example is really only complicating a simpler Chains of Responsibility, where the SomeSystem could be initiated with the chains themselves. Although keeping them packaged may be helpful.</p>

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