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 ready.
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 be trying to call same service again. While in most of the cases such behaviour is fine, still there are use cases when we want to block action button, until REST response is not received (while response is executed, button will be disabled - this will give visual feedback to the user about action still executing). JET provides Busy Context API to handle asynchronous REST calls in synchronous way.
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).
Multi Language Support in Oracle JET. There is great post from Geertjan Wielenga about Translating Oracle JET Applications. If you want to introduce multi language support into JET app - this is great place to start reading from. We are building production Oracle Cloud app with ADF BC REST and JET. This app requires multi language support - English and Lithuanian. I will describe below how we integrated multi language into various areas in the app.
Oracle JET Router API Example. One of the examples of JET Router API usage - sign-in/sign-out implementation. After sign-in we need to change menu structure and allow access to application modules, on sign-out menu structure should be changed again. JET Router API allows to manage application navigation and menu structure from JavaScript. Check complete API methods list here - JSDoc: Class: Router.
JET Application - Generate with Yeoman - Debug in NetBeans. Let's take a look today how to debug JET application which is initially generated with Yeoman. We could debug in NetBeans, but by default application generated with Yeoman is not runnable in NetBeans, we need to add manually some config files - I will describe how. Also note - JET application created with NetBeans can't be directly served with grunt from command line, it also would require manual changes in the config. It would be nice if Oracle would make JET applications generated with Yeoman automatically runnable in NetBeans and vice versa.
Better Oracle JET Code Structuring with Your Own Modules - Part II. You can end up into long lines of JavaScript code when implementing more complex use cases in JET. This will complicate maintenance and make code hardly readable. To prevent this - plan code structure carefully and use your own modules. Structure code into different modules - to reuse common code across multiple use cases.
Oracle JET CRUD - Search and Edit Form - Part I. I'm going to post a series of articles about CRUD functionality (on top of ADF BC) implementation in JET. I already had a couple of posts about JET CRUD implementation, this new series will bring improved and simplified structure for JET code implementation.
Oracle JET Example - Implementing Editable Collection Table. Oracle JET allows to implement inline editable tables. User can double click row or press Enter to switch to edit mode. Use Esc to switch back to readonly mode. With F2 can toggle between editable and readonly. Check it yourself in JET cookbook Editable Collection Table to see how it works.
Using the Oracle JET QuickStart Template. I will show in the post, how you can create single page applications with multiple modules in Oracle JET. As a starting point, you should use the Oracle JET QuickStart template, read about it here. This template comes with sample structure and you could follow it to split application functionality into different groups.
Oracle JET Master-Detail with ADF BC REST. One of the most typical use cases in enterprise applications - Master-Detail relationship implementation. I have decided to implement it in JET and to share this practical implementation with you. Hopefully it will be useful, when you will be learning and building JET applications.
Oracle JET Input Search with ADF BC REST. LOV is popular component in ADF, it allows to seach for data entry in the list, select it and assign to the attribute. I was researching, how similar concept can be implemented in Oracle JET, based on data from ADF BC REST service. JET Input Search component seems to be useful for LOV like behavior implementation.
Oracle JET 2.0.1 - Upgrade for CRUD Sample. Oracle JET 2.0.1 was released in April and I decided to upgrade my CRUD sample (based on ADF BC REST services) implemented with previous JET version. There is migration guide, describing main points to consider, while moving to the next JET version. I'm going to add few more points. Hopefully you will find it useful.
Oracle JET and WebSocket Integration for Live Data. I was researching how to plugin WebSocket into JET. I would like to share my findings and explain how it works. It is amazing, how scalable and quick it is to send JSON message through WebSocket channel and render it in JET. Luckily WebSocket client is implemented in JavaScript, this integrates perfectly with Oracle JET (also based on JavaScript).
