Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]
Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]
- Subject: Re: Dr. Miguel 'Optimistic Locking' Arroz [was Re: WebObjects stress Testing tool?]
- From: Mike Schrag <email@hidden>
- Date: Thu, 3 Dec 2009 14:54:06 -0500
i think we're talking two different things ... if you have an empty superclass constructor and you don't declare any constructors, then yes, there is an implicit constructor created in your subclass that calls super (as well, if you DO declare a constructor and there is an empty super constructor, implicitly a super() is added to the top of your constructor). in this case, because the anonymous subclass is declared as new ERXEC(os), it's actually calling the ERXEC(ObjectStore) constructor (which I PRESUME java secretly added into your subclass with a super(os) call -- this is a little different than a normal class). However, Kieran's specifically talking about the ERXEC.newEditingContext() factory method, which you're bypassing here by explicitly subclassing ERXEC and instantiating the class directly.
ms
On Dec 3, 2009, at 2:45 PM, Ricardo J. Parada wrote:
> Don't subclasses have an implicit super() to invoke the super class constructor?
>
>
> On Dec 3, 2009, at 2:38 PM, Kieran Kelleher wrote:
>
>> True, but then I would be bypassing the EC factory, which just seems dirty, but yes, this very good suggestion is an elegant way to do it for sure.
>>
>> On Dec 3, 2009, at 2:16 PM, Anjo Krank wrote:
>>
>>>> PS. And even the above is not perfect protection against an autolock if a thread gets cpu execution delay between construction statement and the ec.setCoalesceAutoLocks(false) statement. After setting safelocking props to false, I should really check if the ec was autolocked and unlock it before returning .... or even have an ERXEC constructor that takes a safeLocking boolean param, but that would be two more undesired constructors ....... so probably making isLockedInThread public (or accessible using reflection) should do the trick.
>>>
>>> In that case, you'd be better with
>>>
>>> return new ERXEC(os) {
>>> public boolean useAutoLock() {return false;}
>>>
>>> public boolean coalesceAutoLocks() {return false;}
>>> };
>>>
>>> Cheers, Anjo
>>>
>>>
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