Continuous Query Notification

How to select all JDBC Database Change Notification Registrations and clean them?

Question: How do I select all database change notifications registered via JDBC driver by my DB user? Answer: select * from user_change_notification_regs Question: How do I clean all of my DB change notifications? Answer: Database change notifications registered via JDBC driver can be deregistered only the same way – using JDBC driver. Therefore you need to execute this code: This…

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ADF

I get JBO-25200: Application module is not connected to a database exception. What can be the reason?

Problem Time to time “JBO-25200: Application module is not connected to a database” exception is raised while browsing ADF application Solution Tune ADF application module by disabling “Support Dynamic JDBC Credentials”. However this solution may not work in your case, depends on the root cause. Comment If I understand this option correctly, it is needed only when application users must…

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Linux

Ubuntu vpn connects successfully and shortly thereafter fails – network traffic stops – either VPN and local network

I’ve started to use Ubuntu for my job needs and experienced first pretty annoying challenge with VPN connection. I’m using openvpn client with network manager. After successfull connect to VPN server I can use local and remote networks with no problem. After a while – like 1 -10 minutes , sometimes a bit longer up to couple hours or sometimes…

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ADF

ADF how to stretch table vertically and horizontally?

How to stretch ADF table vertically to fill maximum available vertical space in browser? Answer: Put table into af:panelStretchLayout component center facet. Put dimensionsFrom=”parent” attribute into af:panelStretchLayout (parent of af:panelStretchLayout component must stretch its children) How to stretch ADF table horizontally to fill maximum available horizontal space in browser? Answer: Put table into af:panelStretchLayout component center facet. Add styleClass=”AFStretchWidth” attribute to af:panelStretchLayout Example:   <af:panelStretchLayout…

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ADF, ADF Exceptions

ADF java.lang.ClassCastException: …ViewRowImpl cannot be cast to …ViewRow ?

For example: java.lang.ClassCastException: model.DepartmentsViewRowImpl cannot be cast to model.common.DepartmentsViewRow JDeveloper, when generating View Object Row client interface sometimes goes wrong with class definition. Such error can be displayed when implementation of class is not defined. In particular error sample –  “implements DepartmentsViewRow” is missing in DepartmentsViewRowImpl class: public class DepartmentsViewRowImpl extends ViewRowImpl implements DepartmentsViewRow { … }

ADF, Database, SQL and PL/SQL

ADF method for calling DB procedures, executing other SQL statements with input and output parameters

How to call DB procedure with input and output parameters. Here I provide an example of ADF method which can be used with any number of in/pout parameters used in any order:     public void runStatement(String stt, boolean commit, ArrayList<Map<String, Object>> pars) {                  CallableStatement st = this.getDBTransaction().createCallableStatement((stt), 0);      …

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ADF

How to output text with line breaks in ADF ?

Problem Suppose you have multinline (i.e. af:inputText) text field. User fills form by entering some multiple lines in there. Later on you have to display this text in readonly form. You can do this for sure by just adding attribute readonly=”true” or using af:outputText component. Just one issue pops out – there is no multiple lines which user entered –…

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