On 11 Aug 2003 at 1:19, Sonny Sukumar wrote: > > Aha, I think you're onto something there. The results I get make > sense if indeed 1.) all of the map:part pipelines are set up before > any of them executes, and 2.) if actions are executed during pipeline > setup. > > I think we're mostly unclear on #1, but it does seem like that's > what's happening. Assuming it is, do you have any suggestions for > refactoring/rearranging things both in the sitemap and otherwise to > solve the shopping cart subtotal calculation problem I detailed below?
Move the code to calculate your line item costs from an action into your getLineItemCosts.xsp file. Then they'll all be calculated at generation time. Possible? Regards, Upayavira > Thanks for all of your help, > > Sonny > > >Hi Sonny, > > > >I haven't proofed yet but I think your problem may result from the > >way cocoon sets up the pipelines to be executed. I think what happens > >is that during pipeline setup for your main matcher (showCartPage) > >the pipelines for the two parts (getCart and getLineItemCosts) are > >set up resulting in your action (calculate-line-item-costs) being > >executed, because actions are executed during pipeline-setup. After > >setup these pipelines (and so the serverpages) are executed. > > > >As I said, I haven't proofed, but maybe it's a hint you can follow. > > > >HTH, > > > >Kai > > > >Thanks for examining the code for me Upayavira. I saw another post > >in the archives explaining why it'd be too hard for the map:parts to > >be constructed in parallel and for no real gain (SAX events from each > >part coming in at random times and getting mixed up). > > > >So I'm not sure. But please take a look at my specific problem and > >see if there's something I'm missing (must be!): > > > >This is in the sitemap: > > > ><map:match pattern="getCart"> > ><map:generate src="xml/getCartInfo.xsp" type="serverpages"/> > ><map:serialize type="xml"/> > ></map:match> > > > ><map:match pattern="getLineItemCosts"> > > <map:act type="calculate-line-item-costs"/> > > <map:generate src="xml/getLineItemCosts.xsp" type="serverpages"/> > > <map:serialize type="xml"/> > ></map:match> > > > ><!-- ***MAIN MATCHER*** --> > ><map:match pattern="showCartPage"> > ><map:aggregate element="cart-page"> > > <map:part src="cocoon:/getCart" strip-root="true"/> > > <map:part src="cocoon:/getLineItemCosts"/> > ></map:aggregate> > ><map:serialize type="xml"/> > ></map:match> > > > >The first map:part (whose src="cocoon:/getCart") comes out fine, and > >within > > > >its XSP code it pulls the shopping cart from the session. The cart > >just has 1 item (product) in it, and that the XSP modifies the > >quantity of the item from 1 to 0 (I tested that it does). > > > >The 2nd map:part is then executed, and executes an action that > >calculates the subtotal for the cart by pulling the cart from the > >session. HERE is the strange behavior, because the quantity for the > >single cart item is now 1, when it should be 0 (I verified this by > >logging). > > > >So now the 2nd part execution finishes by generating from > >xml/getLineItemCosts.xsp. I actually tried pulling the cart from the > >session again in this code and seeing what the quantity is....and > >it's ZERO! > > > >So my question is: If my Action executes in between the 2 XSPs and > >both of those output 0 for the quantity, how can the Action always > >see it as 1? This is what got me asking if map:parts are constructed > >in parallel. > > > >I'd appreciate all of your insights, > > > >Sonny > > > > >From: "Upayavira" <[EMAIL PROTECTED]> > > >Reply-To: [EMAIL PROTECTED] > > >To: [EMAIL PROTECTED] > > >Subject: Re: [resent] map:part's processed in parallel? > > >Date: Sun, 10 Aug 2003 23:56:27 +0100 > > > > > >Sonny, > > > > > >I've taken a look at the source for the Aggregator. In that code > > >there's > >no > > >reference to > > >threading, however it does use a parser to interpret the sources > > >that the <map:part> nodes refer to. It is possible that those > > >parsers are multi-threaded, and right now finding that out is > > >beyond my level of ability. Maybe someone else can > >help > > >more... > > > > > >Regards, Upayavira > > > > > >On 10 Aug 2003 at 15:02, Sonny Sukumar wrote: > > > > > > > > > > > [I didn't get any response, so I was wondering if somebody knows > > > > about this. > > > > It would be really helpful.] > > > > > > > > Hey all, > > > > > > > > Are map:parts in a map:aggregate executed in parallel or in > > > > serial? Because I wrote one where the 2nd part should only start > > > > to be generated after the first has completed, but the output > > > > indicates a parallel execution instead of a serial one. For > > > > example: > > > > > > > > <map:aggregate element="new-root"> > > > > <map:part src="cocoon:/src1"/> > > > > <map:part src="cocoon:/src2"/> > > > > </map:aggregate> > > > > > > > > Here I need cocoon:/src2 to only begin its generation after > > > > cocoon:/src1 is completed. If they do go in parallel, is there > > > > any way to force the parts to be generated serially? > > > > > > > > Thanks, > > > > > > > > Sonny > > > > > > > > ________________________________________________________________ > > > > _ MSN 8 helps eliminate e-mail viruses. 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