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On Mon, Mar 22, 2010 at 3:14 PM, Jason Meckley <[email protected]>wrote:
> @Mike: I was thinking the Message Module or Interceptor would be the
> 'cross cutting' part.
> @Ayende: I know an exception would cause all messages to fail. I was
> thinking of a 'silent' fail. With an interceptor it would could look
> like
> if(user is authorized) {invocation.Proceed();}
> else {process unauthorized request}
>
Are you sure you want to handle it this way?
It seems like a strange way of doing things. It is much easier to make the
client submit only require auth or no auth requests
> This way other messages in the batch would complete.
> If a message module is called per message who does this work with
> opening NH Sessions? up until this spike I have always passed 1
> message at a time. I got the idea to pass multiple messages with your
> post on efficiently querying (http://ayende.com/Blog/archive/
> 2010/02/15/challenges-where-is-the-optimization.aspx) if a message
> module is used to manage the scope of a NH session would a session be
> opened for each message?
> message arrived()
> {
> CallContext.Bind(sessionFactory.OpenSession());
> }
> message processing completed()
> {
> CallContext.Unbind(sessionFactory).Dispose();
> }
>
> checking for a bind would solve this
> message arrived()
> {
> if(CallContext.HasBind(sessionFactory)) return;
> CallContext.Bind(sessionFactory.OpenSession());
> }
>
>
Yes, that is how you do it.
> I have been assuming these handlers are called once per batch. not
> once per message.
> On Mar 22, 3:35 am, Ayende Rahien <[email protected]> wrote:
> > Jason,
> > If you have a message batch, all the message MUST pass/fail in a single
> > transaction.
> > As for validating all the messages in the batch, the message module will
> be
> > call once per message.
> > You can access the entire batch by calling AllMessages.
> >
> > On Sat, Mar 20, 2010 at 5:00 PM, Jason Meckley <[email protected]
> >wrote:
> >
> > > I want to spike validation and authorization of RSB message
> > > processing. I will be using Castle.Validator and Rhino.Security.
> > > Since each command will have validation and authorization I would like
> > > to put the checks outside of the consumer.
> >
> > > I have used IMessageModule before to manage NH Session but that is
> > > consumer independent so I never had to think about what information
> > > the message(s) contains. For this spike I need access to the message
> > > to validate and authorize. I'm not sure if this logic should be
> > > implemented by an interceptor or message module though.
> >
> > > an Interceptor will require me to validate the interceptor is
> > > associated with an IMessageConsumer. Easy enough with IOnBehalfAware.
> > > However I could skip this check with a message module. A message
> > > module can process multiple messages in a single transaction and I may
> > > want 1 action to fail while another succeeds. I don't think I can do
> > > that with a message module, at that point processing messages is all
> > > or nothing. with an interceptor i could fail specific consumers and
> > > run another operation (like process failed message, or process
> > > unauthorized request.)
> >
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