Package org.axonframework.eventsourcing.eventstore.jpa

Class SQLStateResolver

java.lang.Object
org.axonframework.eventsourcing.eventstore.jpa.SQLStateResolver
All Implemented Interfaces:
PersistenceExceptionResolver
public class SQLStateResolver extends Object implements PersistenceExceptionResolver
SQLStateResolver is an implementation of PersistenceExceptionResolver used to resolve sql state values to see if it violates a unique key constraint.

SQL state codes are standardized - the leading two characters identifying the category. Integrity constraint violations are in category 23. Some database systems further specify these state codes, e.g. postgres uses 23505 for a unique key violation.

Author:
Jochen Munz

  • Constructor Details

    • SQLStateResolver

      public SQLStateResolver()
      Constructor that uses the standard SQL state category for the check.

    • SQLStateResolver

      public SQLStateResolver(String checkState)
      Constructor that can be used to supply a specific SQL state code for the check.

      The check is done using startsWith(), supplying a substring of the state code is ok.

      Parameters:
      checkState - The state string that is used in the check.

  • Method Details

    • isDuplicateKeyViolation

      public boolean isDuplicateKeyViolation(Exception exception)
      Description copied from interface: PersistenceExceptionResolver
      Indicates whether the given exception represents a duplicate key violation. Typically, duplicate key violations indicates concurrent access to an entity in the application. Two users might be accessing the same Aggregate, for example.
      Specified by:
      isDuplicateKeyViolation in interface PersistenceExceptionResolver
      Parameters:
      exception - The exception to evaluate
      Returns:
      true if the given exception represents a Duplicate Key Violation, false otherwise.