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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: Greg <email@hidden>
Date: Sun, 26 Jun 2005 11:41:00 +1000

Thanks for the reply Kieran. I moved this component to not synchronize bindings and converted all the getter and setters to lazily push and pull the bindings. The strange thing is, it hasn't made a difference. I have added logging of when bindings are been set and read. This is really bizzare as it is ouccring after the find method has returned, but before the invoke action has.

2005-06-26 11:35:00,413 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:501) - invoking action 2005-06-26 11:35:00,417 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:83) - getting value for binding: imageSet 2005-06-26 11:35:00,542 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:509) - taking value: {tags = (); image = "56e6d5cd-cb64-4f43-be75-96c3adfe1d28/88317503-1bce-47cf-9244- cc52b577eb55.jpg"; } for key: imageTagsDict 2005-06-26 11:35:00,550 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:79) - setting value: {tags = (); image = "56e6d5cd-cb64-4f43-be75-96c3adfe1d28/88317503-1bce-47cf-9244- cc52b577eb55.jpg"; } for binding: imageTagsDict 2005-06-26 11:35:00,552 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:509) - taking value: null for key: imageTagsDict 2005-06-26 11:35:00,553 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:79) - setting value: null for binding: imageTagsDict 2005-06-26 11:35:00,556 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:560) - finding images 2005-06-26 11:35:00,680 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:513) - setting image set to 0 images 2005-06-26 11:35:00,683 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:79) - setting value: () for binding: imageSet 2005-06-26 11:35:00,684 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:519) - setting image set title: Search Results for: greg 2005-06-26 11:35:00,686 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:79) - setting value: Search Results for: greg for binding: setTitle 2005-06-26 11:35:00,688 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:574) - finished finding 2005-06-26 11:35:00,692 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:83) - getting value for binding: selectedAlbum 2005-06-26 11:35:00,694 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:509) - taking value: Holidays for key: setTitle 2005-06-26 11:35:00,696 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:519) - setting image set title: Holidays 2005-06-26 11:35:00,698 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:79) - setting value: Holidays for binding: setTitle 2005-06-26 11:35:00,700 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:503) - invoked action 2005-06-26 11:35:00,701 ERROR ShoeBox[-:50212 3] ConsumerViewAlbums (ConsumerViewAlbums.java:87) - appending to response

On 25/06/2005, at 9:50 PM, Kieran Kelleher wrote:

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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References:  
  >R-R Loop Oddities (From: Greg <email@hidden>)
  >Re: R-R Loop Oddities (From: Kieran Kelleher <email@hidden>)




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