Didier's Blog

Configuration Property: "MetaObjectManager" Scope

By didier.laurent on May 19, 2008 11:05 AM

I have been working on a tricky case where the customer had developed a custom DBTransactionFactory, following instructions from the article "Creating and Using a Custom DBTransaction Implementation" from Steve Muench.It was working fine and the application was correctly using...

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How To Avoid The JBO-27014 Error During The AutoSubmit

By didier.laurent on April 2, 2008 7:06 AM

When your ADF Faces page includes a component with the property autoSubmit set to true, you get the following error:JBO-27014: Field <fieldName> in <AppModule>.<ViewObject> is mandatory for a component with the property immediate set to true.This happens f.ex. when you...

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Example of Using a selectBooleanCheckbox for VARCHAR2 or NUMBER Columns

By didier.laurent on December 4, 2006 6:07 PM

I've added example # 3 to illustrate how to use an <af:selectBooleanCheckbox> bound to VARCHAR2 or NUMBER Oracle Database columns.This is performed by creating a transient attribute of type Boolean and redefining its getter and setter methods to 'translate' the...

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oracle.jbo.Session User Data Hashtable Not Saved Across Passivation and Activation

By didier.laurent on November 14, 2006 10:10 AM

I explained in a previous post how to simulate the AM (Application Module) passivation / activation.I got some feedback from customers that it helped in determining the cause of a java.lang.NullPointerException end-users were complaining about from time to time.We investigated...

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Set jbo.ampool.doampooling=false to Reproduce Problems Related to AM Passivation / Activation

By didier.laurent on November 12, 2006 8:35 AM

Some users report intermittent errors like the following, occurring under heavy load in the Production environment:oracle.jbo.SQLStmtException:JBO-27120: SQL error during query execution. Statement: <SQL Statement>(...)java.sql.SQLException: Missing IN or OUT parameter at index:: <index number>orJBO-27122: SQL error during statement preparation. Statement: <SQL...

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Application Module Pool Empty After a Certain Period of Inactivity

By didier.laurent on November 12, 2006 7:44 AM

Some customers mention that after a certain period of inactivity, the Application Module pool is completely empty. This happens even though jbo.ampool.minavailablesize (Minimum Available Size) is greater than 0.The reason is that after x milliseconds, we consider an AM instance...

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Chapter 6 of "Oracle JDeveloper 10g for Forms & PL/SQL Developers" on OTN

By didier.laurent on October 19, 2006 7:50 PM

In a previous post, I recommended the book "Oracle JDeveloper 10g for Forms & PL/SQL Developers and referred to the Chapter 6 - Business Services in ADF as example. This chapter can now be downloaded from OTN [Here] (PDF)...

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