Opening two edit pages at once - data corruption

I have a simple jsf page with a table of Employees, now when the user clicks on a button edit, I put the employee with the associated row on the session map and open the edit employee page which uses the Employee from the session map for manipulating the data. Now what can happen is that that the user would try to edit two Employees at once, with the "open page in new window" from his/hers browser meaning that both pages will refer to the same object hence when the user will press save then the other Employee record will get corrupted which is very bad.
How did you solve this issue?

Today I realized that there is a new JSF version 1.1.02 which is shipped with Netbeans 5.5 + VWP. This version is writing a new hidden parameter (<input type="hidden">) com.sun.faces.VIEW in the HTML output and uses a session attribute "con.sun.faces.logicalViewMap" instead of "com.sun.faces.VIEW_LIST". With this "new" feature you should be able to store more than one business object of the same type in one session under some window ID and benefit from all JSF features without workarounds. I removed a part of my own window management and it seems to work.

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Roy-
Make sure the named data value (parameter) for the mergeEntity method matches what is returned by the readObject() query. You should not be sending the results of a readAll() query into the mergeEntity() method.
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ReturnName="SessionEJBLocal.methodResults.SessionEJBLocal_dataProvider_mergeEntity_result">
<NamedData NDName="entity"
NDValue="${bindings.findActionByActionIdIter.currentRow.dataProvider}"
NDType="java.lang.Object"/>
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I think the parameter is in that NamedData tag. The iterator findActionByActionIdIter is...
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which binds to the result of this readObject() query...
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HI,
I am having a Main form consiting of a af:table which is binded .. so when i select the row and click on "edit" button binded with the table.. i am able to get the respective data form in the Edit page.
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Selected setups for P14_PLANNED_START_DATE, all unlisted attributes are blank or null:
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THEN RETURN TRUE;
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Conditions – Condition Type: PL/SQL Function body returning Boolean
Expression 1:
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IF (:P14_PLANNED_START_TIME IS NULL OR :P14_PLANNED_END_TIME IS NULL)
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Database: The attributes for the database column are
Column Name: PLANNED_START_DATE
Data Type: DATE
Nullable: No

Ligon,
You're right to think this is pretty laborious stuff. A co-worker wanted to do the same, to make sure users didn't lose a change when clicking Cancel. I suggested he look at calculating the query checksum before and after, which he tried. But it got very cumbersome very fast and he ended up dropping the idea. He's fairly new with Apex, but he's also a quick study, so it's not like he's a novice coder.
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Stew

Opening two edit pages at once - data corruption

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