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Re: R-R Loop Oddities
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Re: R-R Loop Oddities


  • Subject: Re: R-R Loop Oddities
  • From: Kieran Kelleher <email@hidden>
  • Date: Sat, 25 Jun 2005 07:50:50 -0400

The behaviour you are seeing may be automatic binding synchronization.

If the value being set is related to a binding on the component, then automatic binding synchronization happens automatically at the beginning and end of each phase of the R-R loop. So bindings are pushed and pulled six times in total during the R-R loop. This can cause undesired behaviour in subcomponents. If this is the case for you, then it is recommended practice in general to always turn off automatic synchronization (see synchronizesVariablesWithBindings() in WOComponent) in subcomponents and use lazy initialization with valueForBinding("bindingName") to pull bindings and setValueForBinding( ..., ... ) to push back up to parent component.

    /** Returns false to turn off automatic binding synchronization */
    public boolean synchronizeVariablesWithBindings() {
		return false;
    }

For example, let's say I have a binding called "trader" bound to an object of type CTTrader:


public CTTrader trader() { if ( _trader == null ) { _trader = (CTTrader)valueForBinding("trader"); } return _trader; }

HTH,

-Kieran
________________________________________________________________
Blog: http://webobjects.webhop.org/


On Jun 25, 2005, at 6:13 AM, Greg wrote:

In a component I am having some odd problems that I cannot figure out why it is happening. I have logged each part of the RR loop to try and figure out why it is occurring. What I don't understand is why it is taking a value after it has returned from the method (finding images), and before it has entered the appending to response. Does anyone know why this would be occurring and how I would go about fixing it?

Any help is greatly appreciated.

Regards,
Greg

ConsumerViewAlbums (ConsumerViewAlbums.java:88) - taking values from request
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: {tags = (); image = "56e6d5cd-cb64-4f43-be75-96c3adfe1d28/88317503-1bce-47cf-9244- cc52b577eb55.jpg"; } for key: imageTagsDict
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: null for key: imageTagsDict
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: Greg for key: searchString
ConsumerViewAlbums (ConsumerViewAlbums.java:546) - invoking action
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: {tags = (); image = "56e6d5cd-cb64-4f43-be75-96c3adfe1d28/88317503-1bce-47cf-9244- cc52b577eb55.jpg"; } for key: imageTagsDict
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: null for key: imageTagsDict
ConsumerViewAlbums (ConsumerViewAlbums.java:596) - finding images
ConsumerViewAlbums (ConsumerViewAlbums.java:558) - setting image set to 0 images
ConsumerViewAlbums (ConsumerViewAlbums.java:563) - setting image set title: Search Results for: Greg
ConsumerViewAlbums (ConsumerViewAlbums.java:615) - finished finding
ConsumerViewAlbums (ConsumerViewAlbums.java:554) - taking value: Holidays for key: setTitle
ConsumerViewAlbums (ConsumerViewAlbums.java:563) - setting image set title: Holidays
ConsumerViewAlbums (ConsumerViewAlbums.java:548) - invoked action
ConsumerViewAlbums (ConsumerViewAlbums.java:75) - appending to response


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