Category Archives: Technology

BPEL Deployment Error – Task does not conform to the task definition XML schema definition

When trying to deploy a composite with a BPEL flow, some Business Rules and a Human Task (or two) we ran in errors Invalid task definition. The task definition at CoreModulesDomain/Approve#####t!1.0*soa_6df02ede-80c6-4302-b96d-c9648598713a/ApproveTask does not conform to the task definition XML schema definition. The task definition is associated with workflow CoreModulesDomain/Approve#####!1.0*soa_6df02ede-80c6-4302-b96d-c9648598713a/ApproveTask. The errors are [2]: Element not…More

Define/Assign Custom Paylod for your BPEL Human Task

When you create a BPEL Human Task, the payload type is not specified by default. You can specify a simple type from the drop down on the “Data” menu item on the BPEL Task Editor page. By default if you have not assigned a menu item then your “payload” element is not defined in your…More

Nested ADF AM – Example

Nested ADF Application modules are key to component reuse when building and work like using Java JAR libraries with a slight difference.  You can take your ADF Business Component and create an “adflib” out of it which is a glorified JAR archive with a bunch of other XML files that hold important connection information. The…More

XML Schema – ComplexTypes, Namespaces and Validation

If you are trying to create a new XML schema and have a requirement where a schema element requires a “Complex” element in a repeated fashion then you might be thinking about defining that complex element outside and referencing it like basic XMLSchema types. Note: You might like to go through the W3C Schools tutorial…More

Don’t release the app module yet!

I was well on my way to a new record in creating and deploying a web-service using Oracle ADF tooling when a bug hit me! No matter what I did the View Object instance within the AM would be null. So for example, I was testing the web-service implementation class as a Java main, creating…More

Oracle Weblogic ADF – Application Module Datasource Connection

For a good idea about JDBC URL vs JDBC Datasource see:  http://download.oracle.com/docs/cd/E14571_01/web.1111/b31974/bcservices.htm#ADFFD1501 Configuring JDBC Datasource According to Oracle “A data source is a vendor-independent encapsulation of a database server connection”. When deploying an Oracle ADF application with a bc4j (Business Configuration) to a stand-alone Weblogic instance, you need to make sure your data-source is configured…More

SQL Developer – Date Format

You are on SQL Developer and have a date-time column, you run a query and it only displays the date. You could do a “to_char(mydatefield,’MM/DD/YYYY hh24:mi:ss’) ” but then you will have to do it for ALL date fields and change all your saved queries. You wish there was something in SQL-Developer that would apply…More

Boggle Solver

Attempt 1: Use Arrays and Lists and a recursive function to loop over all letters in the boggle board and find all possible words of size [min-length] to size [max-length] where min-length >= max-length. Code: Apr 16, 2010 2:42:59 PM 1 package boggle; 2 3 import java.util.ArrayList; 4 import java.util.Arrays; 5 import java.util.HashSet; 6 import…More

Why do OJC and Javac differ?

Introduction: A certain developer wanted to specify Generic Type in his abstract Java class, like the Java Map interface and AbstractMap class, in the manner described in Code Sample A, below. Setup: – We have 2 environments desktop and remote hosts – Applications are built on the desktop in JDEV (11gR1) using OJC by default…More

Python + MySQL in Ubuntu (9.10)

Assuming you did a fresh install of Karmic Koala – Ubuntu 9.10 Here are the steps: – Install Python: apt-get install python2.6 – Install XAMPP/LAMP stack: sudo tasksel install lamp-server After you install follow the steps on setting up the root password see the notes here . – Install MySQLdb: I tried downloading the sourceforge…More

Stuff to read

Must read up more on these – download, test, play JGraph – http://www.jgraph.com/mxgraph.html Parallel port interfacing made easy – http://www.epanorama.net/circuits/parallel_output.html Wireless Rabbit Web Server – http://killerprojects.wordpress.com/2010/04/06/wireless-rabbit-web-server-802-11-bg-w-video/#more-53 Introduction to WI-FI, Wireless LAN basics, Wireless Security, Rabbit Wireless doc – http://www.rabbit.com/documentation/docs/manuals/WiFi/Introduction/WiFiIntro.pdf Introduction to ZigBee – http://www.rabbit.com/documentation/docs/manuals/ZigBee/Introduction/ZigBeeIntro.pdf I Make Projects – Wireless Detector  (Hooking up a vibe motor…More

Design Patterns

Introduction  In the realm of enterprise application development, Java 2 Platform, Enterprise Edition (J2EE) has long stood as a bastion of robustness and scalability. An intriguing facet of J2EE is its harmonious blend with the timeless design patterns delineated by the Gang of Four (GoF). This post delves into how the GoF patterns breathe life…More

Matrix manipulation

When solving Boggle, Sudoku or some n-by-n board game or when doing Image analysis or Parallel Computing – it is often useful to be able to represent one-dimensional data structures in 2-dimension and vice-versa. Simple formulae exists for doing this conversion, as illustrated below: Converting from Row by Col 2-dimensional (2-index) format to a 1-by-(Row*Col)…More

Create tables in MySQL using JDev

Steps: Setup MySQL Setup JDev Create a new JDev Application Create a new Database Diagram with a sample Table Add columns to the table Create a database connection from JDev to MySQL and Publish the Table to MySQL Note:  Put the mysql-connector-java-3.1.14-bin.jar in the lib path (JDEV or JDK) to avoid Driver Not Found type…More