Interface TwoPhaseResource

All Known Implementing Classes:
WriteableBeanDatabaseImpl.TwoPhaseResourceImpl

public interface TwoPhaseResource
Implementations of this interface can be added to a DynamicConfiguration in order to atomically participate in the changes being made to the ServiceLocator. No changes to the ServiceLocator can be made from any method of this interface, otherwise the ServiceLocator can be left in an inconsistent state
  • Method Details

    • prepareDynamicConfiguration

      void prepareDynamicConfiguration(TwoPhaseTransactionData dynamicConfiguration) throws MultiException
      This method is called prior to any changes being made to the ServiceLocator but after the IdempotentFilters are called. If this method throws any exception the entire transaction will not go forward and the thrown exception will be thrown back to the caller. If this method completes successfully then either the commit or rollback methods will be called eventually once the final outcome of the transaction has been established. This method is called with the write lock of the ServiceLocator held
      Parameters:
      dynamicConfiguration - Information about the dynamic configuration for which this resource was registered
      Throws:
      MultiException - If for some reason the transaction can not go through the expected exception is a MultiException with enclosed exceptions detailing the reasons why the transaction cannot complete. No subsequent TwoPhaseResource listeners will be invoked once any TwoPhaseResource throws any exception
    • activateDynamicConfiguration

      void activateDynamicConfiguration(TwoPhaseTransactionData dynamicConfiguration)
      Once all TwoPhaseResource prepare methods have completed successfully the activate method will be called on all registered TwoPhaseResource implementations. Any exception from this method will be ignored (though they will be logged if debug logging is turned on). This method is called after the write lock has been released and all other listeners have been called
      Parameters:
      dynamicConfiguration - Information about the dynamic configuration for which this resource was registered
    • rollbackDynamicConfiguration

      void rollbackDynamicConfiguration(TwoPhaseTransactionData dynamicConfiguration)
      If any TwoPhaseResource fails then all TwoPhaseResources that successfully completed their prepare method will get this method invoked. Any exceptions from this method will be ignored (though they will be logged if debugging is turned on). This method is called with the write lock of the ServiceLocator held
      Parameters:
      dynamicConfiguration - Information about the dynamic configuration for which this resource was registered