This solution would have been ok if I had only one node created from that factory in each transaction. however, as shown in the sample code I posted in the original message, I have multiple nodes created in one transaction, and multiple such transactions in multiple threads. So while the creation of the actual nodes will of course be serialized, one thread's transaction will have to wait for the other thread's transaction to finish completely, and so if the first thread has some processing to do between the creation of the first and second nodes, the other third won't be able to create its two nodes in the meanwhile, because the first thread will have the lock on the factory node until the entire transaction completes. I'm looking for a way to do this having the nodes creation serialized but without having the entire transactions serialized, possibly by somehow releasing the lock on the factory node in mid-transaction, or by any other method. Thanks again, Ran.
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