Hi guys:
I'm creating an app that I need to deal with concurrent modification of
object.
Given I have an object that I need to store on memcache.
Now, given my user base would be big enough for two request to arrive
simultaneously at two different servers in the cloud.
So, in order to modify the object, the server #1 that receive request
fetch the object from memcache (Correct me if I'm wrong: this will
deserialized raw data on memcache in to Java Object on Server #1 JVM),
modify it and then put it back to memcache (which in turn serialize the
object).
At the same time, server #2 tried to modify the object on memcache.
Under this scenario: Server #1 fetch object> Server #2 fetch object >
Server #1 store object > Server #2 store object
Then all changes make by Server #1 will be overrided by Server #2.
If these 2 requests happen on the same Server (and in effect, the same
JVM), then I believe the use of synchronized access will help. But in
case they happen on different server, then I don't know how to handle
them yet.
Would you guys advice me on that?
Thanks.
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