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JEE: Use of transactions in servlets

  • 22-03-2007 7:36pm
    #1
    Civilian_Target
    Registered Users, Registered Users 2 Posts: 5,618 ✭✭✭


    I've been looking recently into safe automated mechanisms of refactoring JEE applications to improve their performance and I came across an example where entity beans are being accessed outside the scope of a transaction, leading to pathalogical database access.
    http://www-128.ibm.com/developerworks/websphere/techjournal/0502_ejba/0502_ejba.html#sec3

    If the bean access is scoped within a transaction, then the calling JSP will have to wait until the servlet commits the transaction before data fields can be populated. What happens, then, if the servlet attempts to use one of the variables from the entity beans for its own purposes (eg. a println or invoking a remote method using the data) before the transaction is committed? What effects would autocommit have on this?


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