[Opensource] Time to initialize dbobject

[BSC]

Makes perfect sense. Thx.

---
Aime 


On Fri, 07 Jun 2002 12:31:21  
 Michael Rimov wrote:
>At 09:09 PM 6/6/2002 -0500, you wrote:
>>On Thu, 06 Jun 2002 10:54:52
>>  Michael Rimov wrote:
>> >At 09:08 AM 6/6/2002 +0200, you wrote:
>>
>>(snip)
>>
>> >Thirdly, DBObjects themselves are not truly threadsafe [Although the
>> >function to get the value from the cache is, the rest of it isn't.]
>>
>>DBObjects are not threadsafe??  Are you saying that using DBObjects from a 
>>servlet environment could cause database corruption or other problems?
>
>Not at all!  Sorry for the misunderstanding!  But if you think about it a 
>threadsafe object is only necessary if:
>
>1 - The object is actually shared between server requests
>
>or
>
>2 - The object is specifically shared between two threads without explicit 
>queues.
>
>
>In this case, a DBObject is traditionally retrieved by a single 
>request.  Therefore, inter-thread sharing is not truly really necessary.
>
>The ONE case where a DBObject is shared across threads is through the 
>dbobject cache.  Access to the DBObjects through the cache IS 
>threadsafe.  Thus you won't be corrupting anything in the database.  In 
>fact my own test takes about 30 threads and works with the underlying 
>database as a test case.  If that helps to ease your mind.
>
>Why I say not threadsafe, is that right now an instantiated DBObject is not 
>intended to be shared except through the system cache.  You could easily 
>create a wrapper object where all methods to the object are synchronized, 
>and you would be fine.
>
>It gives us a LARGE performance boost by working things that way, and still 
>allows DBObjects to be used in the way they typically are through a normal 
>servlet request.
>
>Does this make sense?  Am I babbling?  Let me know! :)
>
>                                                 -Mike
>
>
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