Examples of hirondelle.web4j.database.DuplicateException

hirondelle.web4j.database.DuplicateException

try..catch is needed only if the operation //can have a duplicate problem try { dao.addSomething(); } catch (DuplicateException ex){ addError("Cannot add. That item already exists."); } }

Note that if the operation cannot have a duplicate problem, then the Action should not attempt to catch DuplicateException.

Here is the DAO operation which may have a duplicate problem.

 //It is highly recommended, but optional, to declare  //DuplicateException in this method header, to bring  //it to the attention of the caller public addSomething() throws DAOException, DuplicateException { //...elided }

Again, if the operation cannot have a duplicate problem, then the DAO should not declare a DuplicateException in its throws clause.

The {@link Db#add(SqlId,Object[])} and {@link Db#edit(SqlId,Object[])} methods can throw a DuplicateException.

  @Override Id add(Member aMember) throws DAOException, DuplicateException {
    possiblyThrowExceptionFor(DbOperation.Add);
    synchronized (fMembers){
      for(Member existingMember:  fMembers.values()){
        if ( existingMember.getName().equals(aMember.getName())){
          throw new DuplicateException("Duplicate name: " + Util.quote(aMember.getName()), new Throwable());
        }
      }
      Id id = getNewId();
      //need to attach the id to the member in two ways here
      Member member = getMemberWithId(aMember, id);

  */
  public static void possiblyThrowExceptionFor(DbOperation aOperation) throws DAOException, DuplicateException {
    DbOperationResult opResult = getOperationResult(aOperation);
    if (FakeDAOBehavior.DbOperationResult.Succeed == opResult) return;
    if (FakeDAOBehavior.DbOperationResult.ThrowDAOException == opResult) throw new DAOException(FORCED_FAILURE, FORCED_EXCEPTION);
    if (FakeDAOBehavior.DbOperationResult.ThrowDuplicateException == opResult) throw new DuplicateException(FORCED_FAILURE, FORCED_EXCEPTION);
  }

Examples of hirondelle.web4j.database.DuplicateException

Related Classes of hirondelle.web4j.database.DuplicateException