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Re: [IndexedDB] IDBRequest Interface Questions

From: Shawn Wilsher <sdwilsh@mozilla.com>
Date: Mon, 22 Mar 2010 10:17:32 -0700
Message-ID: <4BA7A62C.8080907@mozilla.com>
To: Jeremy Orlow <jorlow@chromium.org>
CC: public-webapps WG <public-webapps@w3.org>
On 3/22/2010 10:05 AM, Jeremy Orlow wrote:
>> I also can't seem to figure out what the success event is supposed to be
>> for just about anything.  Am I just missing something, or is this not yet
>> specified?
> When onsuccess fires, you can then start the next request.
Sorry, I guess I'm not being totally clear in what I'm asking.  In the 
Events [1] section, only IDBDatabaseError is specified.  I'm not sure 
what a success message should look like, and that's what I'm asking to 
be clarified.

> Do you have anything to say regarding a callback based API vs. event one
> that inherits from EventTarget?
By callback you mean passing a callback function into the API calls, 
correct?  Assuming that, I prefer the event based API, but I think the 
current spec could you some modifications to address some concerns that 
were brought up.

As I recall, the issue with the current event-based model is that you 
can only have one request in flight at a time.  I think we could solve 
this problem by having the asynchronous methods return an IDBRequest 
object instead of having a global one for a given context (not 
completely sure how to describe all the places where we have a request 
attribute but that is what I am talking about).  I'm not 100% sure yet 
if we'd need the request attribute on all of these things after doing 
this, or what it would be in each instance.

Cheers,

Shawn



Received on Monday, 22 March 2010 17:16:56 GMT

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