ADF BC REST Service from ADF Library JAR

I had assignment to enable ADF BC REST for existing ADF application, which was developed with multiple ADF libraries. ADF BC REST was supposed to be enabled for one of the ADF libraries and then accessed through Master application. All ADF BC REST samples usually show how to enable REST inside Master application itself. I was curious if it will work to enable ADF BC REST and package it into ADF library, which is consumed (more...)

Oracle JET List Implementation based on WorkBetter Alta UI

During weekend I was playing with JET WorkBetter sample app. I thought it would be nice to extract People list UI into my own app - so that it will be easy to reuse this UI pattern in our own JET applications. I succeeded to achieve my goal and would like to share WorkBetter Alta UI list sample with you.

This is how my own JET list UI looks like, based on sample app:


Header (more...)

Oracle JET Simple Table with Fake JSON Server

What if you want to build JET UI, but there is no back-end REST service ready yet. You could use static JSON data inside JET app and load it from the JSON file. This works, but data retrieval logic will need to be changed after REST service will be ready. This is not productive. Ideally you would like to have fake REST service to simulate REST calls from JET UI, until real REST back-end is (more...)

ADF 12c Table CRUD Fix for Auto Focus

I had a post about how to improve user data entry for ADF table with auto focus for new row - Improving ADF UI Table CRUD Functionality with Auto Focus. If you follow comments thread for that post - you will see described approach doesn't work exactly as it should in ADF 12c (focus is set for new row but later is lost after tab navigation - it should move focus to another column). Thanks (more...)

ADF Client Side Validation with JavaScript

In my previous post I explained how to use JS client side formatter for ADF Faces input components - ADF Goes Client Side - UI Performance Boost with JavaScript. The same principle can be applied for client side validation. Most likely you are not going to implement complex validation rules on the client side, but for simple checks - it will be perfect. There will be no roundtrip to the server and this will allow (more...)

Oracle Java Cloud Service – Scaling and Cluster Setup for ADF

Last couple of weeks I was busy preparing to my OOW'17 session about estimating Java Cloud Service performance for ADF application. I was running stress tests against various JCS instance configurations to be able to create performance estimation methodology. I will describe this methodology on OOW, but here today will list key steps required to scale up JCS instance.

Let's assume you are running single cloud node with 1 CPU and 7.5 GB RAM. (more...)

My Blog Samples Download Repository (For Samples Before 2014 January)

I have been asked, where to download my blog sample applications, posted before 2014 January. If you try to download such sample - you will get error about sample not found. Thats because Google discontinued their support for Google Code repository.

However, you can still download all my samples posted before 2014 January from Google Code archive. Go to archive URL - Google Code Archive for jdevsamples and you can browse all old samples there (more...)

Oracle JET Busy Context API to Control Asynchronous REST Calls

I have received feedback from users working with JET UI - sometimes it is not obvious that action button was pressed, users tend to press same button again very fast, which leads to parallel REST calls executing at the same time. In JET - REST call is executed asynchronously, this makes user to believe action was done instantly when button was pressed. However, REST call still may run in the background - while user will (more...)

ADF Goes Client Side – UI Performance Boost with JavaScript

If you would like to boost ADF UI performance, you should look into client side validation and formatting options possible to be done in ADF UI. Today I will describe how you can implement client side converter, to format number value on client side, without making request to the server. Same approach could be used to implement client side validators. You can raise error message and it will be assigned to UI field in the (more...)

ADF BC – Create View Object From Query with Custom Implementation Class

I had a request to explain how to create dynamic ADF BC VO from SQL statement and set custom VO implementation class for newly created VO instance. Custom VO implementation class extends from ADF BC ViewObjectImpl and overrides super method:


There is a method createViewObjectFromQueryStmt, in previous ADF versions this method had two parameters - VO instance name and SQL statement. In current ADF 12c - there is a second signature of the same (more...)

ADF 12c BC Proxy User DB Connection and Save Point Error

If you are modernising Oracle Forms system, high chance you need to rely on DB proxy connection. Read more about it in my previous post for ADF 11g - Extending Application Module for ADF BC Proxy User DB Connection. It works in the same way for ADF 12c, but there is issue related to handling DB error, when DB proxy connection is on. DB error is propagated to ADF but is being substituted by save (more...)

Working with Location and Permissions in JET Hybrid

What if you want to access mobile device location data from JET Hybrid application? This can be achieved with Cordova Geolocation plugin. But you want it to be nicely done and want to make sure application is granted with permission to access location information. Use Cordova Permissions plugin for that.

You could add Cordova plugin to JET app by executing this command:

cordova plugin add 

If this command doesnt work for any reason, you could (more...)

JDeveloper 12.2.1.2 Patch for Transient Expression Compilation Infinite Loop

If you are using JDeveloper 12.2.1.1 or 12.2.1.2, probably you run into transient expression compilation infinite loop issue. Infinite loop happens when you open ADF BC project and navigate to VO, which contains Groovy expressions. JDeveloper starts to print repeating message in the log - compiling TransientExpression and soon at some point JDeveloper window closing down without any feedback:


For those of you, who are not aware - there (more...)

Oracle JET Router State Control

In my use case there is requirement to navigate to JET module, without displaying it in menu structure. Navigation is a simple task, more complex is to make sure current menu item will be unselected after navigation to invisible module (so that later we are able to re-open it).

There is accounts module in JET sample app (download it from GitHub - JETModularArchitecture):


Accounts module is included into router, but not included into array (more...)

Oracle JET Modular Architecture Example

One of my favourite parts in Oracle JET - modular code structuring support. This allows to split application functionality into modules and reusable functions. In this post I will show how you could leverage Oracle JET modular architecture not only by implementing common code functions, but also by managing data maintained in common modules.

Let's jump to the example (download or browse through sample code on GitHub repository - JETModularArchitecture). Sample application is based (more...)

ADF BC Attribute – Collection Storage Mode Property

I would like to describe one interesting property for ADF BC attribute. This property is called Storage. There are two possible values: row (default) and collection. By default attribute value is saved in row storage, but alternatively it can be saved in collection storage. ADF BC implements collection storage using map which comes from session scope. This allows to keep value even between ADF BC requests, this is ideal for transient attributes.

Sample application ( (more...)

Fixes for ADF Cloud User Experience Rapid Development Kit (RDK) UI Layout Issues

If you was evaluating Oracle RDK UI template, probably you noticed information popup coming up, when RDK home page is loaded. Popup is loaded through showPopupBehavior listener, which is executed on Welcome page load event. Such popup is not required in practice, and usually is disabled. But as soon as you disable it, there will be layout issues with Welcome page. User information widget will not align the name and menu navigation items will not (more...)

Nice Trick to Get ADF LOV Description Text

I will tell you about nice trick to display LOV description. Usually you would create separate attribute in VO for LOV description and base LOV on this attribute (read about it in my previous post - Defining the LOV on a Reference Attribute in Oracle ADF 11g). But there is one more way - it makes it much faster to define LOV on description, but you should be aware about additional SQL statement executed (more...)

Running ADF BC REST Service Together with ADF Faces Application

ADF 12c provides out of the box support for ADF BC REST API. It is straightforward to create ADF BC REST service and run it. But what if you would like to expose ADF BC REST for existing ADF application with ADF Faces UI. This could be useful if there is a requirement to handle ADF Bindings access to ADF BC along with light ADF BC REST service API implementation for Oracle JET or other (more...)

ADF PopUp Event Context Launcher

I will describe how you could use ADF popup event context to pass parameters into popup. This could be useful if you want to develop reusable popup, which should accept different type of parameters from various launcher components.

In this example - popup is loaded from context info. Launcher component - output text is assigned with attribute, reading its value from binding. Our goal is to pass attribute value into popup:


In order to be (more...)