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The preceding output is interesting in that SID 177 (session 1) was holding a mode 3 lock on object 67165 (T6). The SQL_ID for session 1 is NULL, which would make it difficult to determine the SQL statement that caused the initial enqueue. SID 154 (session 2) was holding a mode 3 lock on the same object, and was attempting to acquire a mode 5 lock on the same object. SID 155 (session 3), which should be waiting on a potential primary-key violation in an enq: TX - row lock contention wait event, if not for the activity of session 1, was instead attempting to acquire a mode 3 lock on object 67165 (session 3 on Oracle 10.2.0.4 attempted to acquire a mode 2 lock). Session 1 was blocking session 2, which was blocking session 3. The SQL_ID for session 2 did not indicate the SQL statement that caused the blocking of session 3. Instead it indicated the SQL statement that caused it to start waiting on the enq: TM - contention wait event. When session 1 eventually committed, the transaction for session 2 (SID 154) or session 3 (SID 155) automatically rolled back because of a deadlock. (Oracle 10.2.0.4 did not force a rollback due to a deadlock; instead session 3 remained hanging on a different enqueue wait event.) On Oracle 11.1.0.7 and 11.2.0.1, the following deadlock graph was written to a trace file when session 1 issued a COMMIT command: Deadlock graph: Resource Name TM-0001065d-00000000 TX-0009000b-00000db5 ---------Blocker(s)-------process session holds waits 40 155 SX 25 154 X ---------Waiter(s)--------process session holds waits 25 154 SX SSX 40 155 S

The reason for cloning the business object is so an exact copy of the object can be saved to the database It is this exact copy of the object that has its fields changed during the update process If the update fails, then the original object remains intact and unchanged, but if the update succeeds, then the Save() method returns the successfully updated version of the object, including any new field values Here s the code for the Save button on the RolesEdit user control: private void SaveButton_Click(object sender, EventArgs e) { thisrolesBindingSourceRaiseListChangedEvents = false; Roles temp = _rolesClone(); try { _roles = tempSave(); thisClose(); } catch (CslaDataPortalException ex) { MessageBoxShow(exBusinessExceptionToString(), "Error saving", MessageBoxButtonsOK, MessageBoxIconExclamation); } catch (Exception ex) { MessageBoxShow(exToString(), "Error saving", MessageBoxButtonsOK, MessageBoxIconExclamation); } finally { thisrolesBindingSourceRaiseListChangedEvents = true; } }.

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Pulling out these nouns, along with those that are likely to be just data fields (such as project name and employee ID), you can come up with a smaller list of likely business objects, allowing you to start creating a basic class diagram or organizing the classes using CRC cards. Table 6-2 lists the high-level CRC data for each potential object.

PL/SQL procedure successfully completed. ops$tkyte@ORA11UTF> select length( c ), lengthb( c ) 2 from t 3 where c is not null; LENGTH(C) LENGTHB(C) ---------- ---------2000 4000 And as you can see, they consume 4,000 bytes of storage.

Let s change the map mode to aerial with labels as the default view, and also introduce 3D animation to the map. To change the default map mode, first give the Map element a name (in this example I used map_in_ironruby) so that it can be referenced in the IronRuby code. I ll also apply 3D projection to the Map object. To do that I set the Projection property of the Map object to PlanProjection and set the RotationX property to -20. This transforms the Map object, giving a slightly skewed viewing angle. <Grid x:Name="layout_root" Width="1350" Height="575" Background="Black"> <m:Map x:Name="map_in_ironruby" CredentialsProvider=" Your Authentication Key Goes Here" Width="800" Height="400"> <m:Map.Projection> <PlaneProjection RotationX="-20"/> </m:Map.Projection> </m:Map> </Grid> Notice that I also changed the background of the Grid to black.

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