[Helma-user] Suggestion: onPersist function call

[Hannes Wallnoefer]

Thanks, Kris. This makes sense and looks good. I'll commit it later today.

Any other opinions?

hannes

2007/4/4, Kris Leite <kleite at imcsoftware.com>:
> Hi Hannes,
>
> Attached is a patch for the 'onPersist' function call.  In version 1.6 I
> found that
> the 'onInit' was moved from the Node class to NodeManager.  So I put the
> 'invokeOnPersist' in the NodeManager class to be consistent.  I also
> removed
> the check for 'dbmap' in the 'onInit' section since that would only
> allow the routine
> to be activated for only database configuration.  The documentation for
> 'onInit'
> indicated it was to be activated for both embedded and database persistence
> storage.
>
> Thanks,
> Kris
>
>
> Hannes Wallnoefer wrote:
> > Hi Kris,
> >
> > 2007/4/3, Kris Leite <kleite at imcsoftware.com>:
> >
> >> I had a need to do some changes on a HopObject before it was
> >> written into storage.  So I made a customized version Helma 1.5.3
> >> to call 'onPersist' function when a HopObject was being written
> >> into the embedded or relational database.
> >>
> >> It would be nice if this was added as a new feature for Helma 1.6.
> >>
> >> The way I implemented it was very similar to the 'onInit()' function
> >> by making a copy of the "invokeOnInit" function in Node.java
> >> and changing the names to 'OnPersist' then adding a call to
> >> 'invokeOnPersist' in the NodeManager methods 'insertNode' and
> >> 'updateNode'.
> >>
> >> I will be happy to provide the patches if you like.
> >>
> >
> > Yes, please send a patch.
> >
> > hannes
> >
> >
> >> Thanks,
> >> Kris
> >>
> >>
> >> _______________________________________________
> >> Helma-user mailing list
> >> Helma-user at helma.org
> >> http://helma.org/mailman/listinfo/helma-user
> >>
> >>
> > _______________________________________________
> > Helma-user mailing list
> > Helma-user at helma.org
> > http://helma.org/mailman/listinfo/helma-user
> >
> >
>
> # This patch file was generated by NetBeans IDE
> # Following Index: paths are relative to: D:\jRTsrc\helma-1.6\helma\src\helma\objectmodel\db
> # This patch can be applied using context Tools: Patch action on respective folder.
> # It uses platform neutral UTF-8 encoding and \n newlines.
> # Above lines and this line are ignored by the patching process.
> Index: NodeManager.java
> *** D:\jRTsrc\helma-1.6\helma\src\helma\objectmodel\db\NodeManager.java Base (1.153)
> --- D:\jRTsrc\helma-1.6\helma\src\helma\objectmodel\db\NodeManager.java Locally Modified (Based On 1.153)
> ***************
> *** 349,355 ****
>           }
>           // New node is going ot be used, invoke onInit() on it
>           // Invoke onInit() if it is defined by this Node's prototype
> -         if (node.dbmap != null) {
>               try {
>                   // We need to reach deap into helma.framework.core to invoke onInit(),
>                   // but the functionality is really worth it.
> --- 349,354 ----
> ***************
> *** 360,366 ****
>               } catch (Exception x) {
>                   app.logError("Error invoking onInit()", x);
>               }
> -         }
>           return node;
>       }
>
> --- 359,364 ----
> ***************
> *** 421,426 ****
> --- 419,425 ----
>        */
>       public void insertNode(IDatabase db, ITransaction txn, Node node)
>                       throws IOException, SQLException, ClassNotFoundException {
> +         invokeOnPersist(node);
>           DbMapping dbm = node.getDbMapping();
>
>           if ((dbm == null) || !dbm.isRelational()) {
> ***************
> *** 531,536 ****
> --- 530,551 ----
>       }
>
>       /**
> +      *  calls onPersist function for the HopObject
> +      */
> +     private void invokeOnPersist(Node node) {
> +         try {
> +             // We need to reach deap into helma.framework.core to invoke onPersist(),
> +             // but the functionality is really worth it.
> +             RequestEvaluator reval = app.getCurrentRequestEvaluator();
> +             if (reval != null) {
> +                 reval.invokeDirectFunction(node, "onPersist", RequestEvaluator.EMPTY_ARGS);
> +             }
> +         } catch (Exception x) {
> +             app.logError("Error invoking onPersist()", x);
> +         }
> +     }
> +
> +     /**
>        *  Updates a modified node in the embedded db or an external relational database, depending
>        * on its database mapping.
>        *
> ***************
> *** 539,544 ****
> --- 554,561 ----
>        */
>       public boolean updateNode(IDatabase db, ITransaction txn, Node node)
>                       throws IOException, SQLException, ClassNotFoundException {
> +
> +         invokeOnPersist(node);
>           DbMapping dbm = node.getDbMapping();
>           boolean markMappingAsUpdated = false;
>
>
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>
>