Teaching How to Invoke REST APIs from Oracle Visual Builder Web/Mobile Apps

In this blog, I am going to show you how to build a nice and simple UI with data coming from invoking REST APIs. All without code, but in just a few clicks.

I consider myself a good backend developer, good at making things functional, but I really struggle every time I need to produce nice UIs. However, using Oracle Visual Builder, I feel like I don’t have to be a UI developer or designer, I can very easily produce nice and friendly mobile UIs that consume my backend REST APIs. If you are like me, a backend programmer who loves API-first design approach, I’m sure that you will find this blog not only informative, but also refreshing.

This is a quick view of what we are going to achieve in this article:

  1. First, we are going to auto-create Service controls in Oracle Visual Builder by pointing to existing REST APIs.
  2. Then, we are going to use the out-of-the box widgets and components to build a simple, yet powerful UI that consumes such APIs.
  3. Finally, we are going to publish the UI and test it across different media, e.g. Web on a laptop, mobile, tablets, etc.

Continue reading “Teaching How to Invoke REST APIs from Oracle Visual Builder Web/Mobile Apps”

Teaching How to Invoke Gen2 Oracle Cloud Infrastructure (OCI) resources via REST APIs

I am thrilled with the Oracle’s Gen2 Cloud Infrastructure architecture, where Oracle completely separates the Cloud Control Computers from the User Code, so that no threats can enter from outside the cloud and no threats can spread from within tenants.

Obviously with more security, there comes more coordination, especially at the moment of invoking OCI resources APIs. Luckily, Oracle did a good job at providing a simple to use CLI and SDK (see here for more information).

For the purpose of this blog, I built a simple NodeJS application that helps demystify the security aspect of invoking OCI APIs. Check this link for examples of running similar code across other Programming Languages.

My NodeJS application manages OCI resources in order to:

  • List ADW instances
  • Stop an ADW instance
  • Start an ADW instance

I started this NodeJS application to list, start and stop ADW resources. However, I designed this application to easily extend it to invoke any other type of OCI resources.

I containerised this application with Docker, to make it easier to ship and run.

This is a picture of the moving parts:

Continue reading “Teaching How to Invoke Gen2 Oracle Cloud Infrastructure (OCI) resources via REST APIs”

Applying Oracle Machine Learning in Oracle Autonomous Database on Home Loan Approval Data

The machine learning process used for this exercise

Hope you have heard about the Oracle’s Self Driving Autonomous Database. Autonomous Database is an autonomous data management software in the cloud to deliver automated patching, upgrades, and tuning — including performing all routine database maintenance tasks while the system is running — without human intervention. This new autonomous database is self-driving, self-securing, and self-repairing, which helps to eliminate manual database management and human errors. Also, there is also a secret weapon called Machine Learning in a Box built into the Oracle Autonomous Database Platform. Here is a quick lab guide to get you started on how to use the Oracle Autonomous Database Platform.

In this article, I would like to walk you through a practical example of how we can take advantage of the Machine Learning capability in the Oracle Autonomous Database Platform and make decisions instantly.

Here is a background of our Fictitious company: Vision Housing Finance Corp that deals in home loans. They have a presence across all urban, semi-urban and rural areas. Customer first applies for a home loan after that company validates the customer eligibility for a loan.

Problem

VisionCorp wants to automate the loan eligibility process (real-time) based on customer detail provided while filling the online application form. These details are Gender, Marital Status, Education, Number of Dependents, Income, Loan Amount, Credit History and others. So they would like to understand if they can take their existing data sets and apply some machine learning to automate the loan decision-making process. You can download the historical dataset that this company has provided from here.

Continue reading “Applying Oracle Machine Learning in Oracle Autonomous Database on Home Loan Approval Data”

Teaching How to Increase Value from your Data

Databases and Data Warehouses have been around for a long time and they bring multiple benefits to business, but these also come at a cost. Some of the associated challenges include:

  • Complex and Expensive to provision and secure
  • Inability to manage data and user growth
  • Costly to maintain

In this post, I will provide some resources on how Oracle Autonomous Database and Data Warehouse aim at easing these challenges and increase the speed at which you can innovate and the value you can get from your data.

Continue reading “Teaching How to Increase Value from your Data”

Using Public/Private Key Authentication for Oracle IDCS

In a recent blog post, I added a throwaway reference to the use of signed assertions as a better mechanism for interacting with the Oracle Identity Cloud Service REST APIs than the use of Client id/secret, though qualified it with ‘if you want to handle the additional complexity in your consuming client’.  Reflecting upon this, I thought that perhaps it was worth trying to explain this ‘additional complexity’, since the use of signed assertions have a number of benefits; primarily that it does not require an exchange of sensitive information, as the private keys used to sign the assertion never need to leave the machine on which they are generated. In this blog post, I will delve deeper into what is required to leverage this authentication mechanism, for both clients and users.

Continue reading “Using Public/Private Key Authentication for Oracle IDCS”

Custom User Activation and Password Reset Flows in Oracle IDCS

Oracle’s Identity Cloud Service is typically associated with its role in acting as the primary identity store for Oracle’s Cloud services – acting as the gatekeeper for administrators and developers, and providing single-sign-on across Oracle services for end users. However, thanks to its API-first design, it is also very capable of acting as a headless OAuth server and user store, providing authenticated access to custom applications and APIs. When these custom applications are customer facing, you will want fine-grained control over your user experience, without them interacting with IDCS directly. In this post we will explore implementing custom user activation and password reset flows; which provides the opportunity to implement pixel perfect UIs, modify the flows for different classes of users, or just do whatever your custom application requires.

Continue reading “Custom User Activation and Password Reset Flows in Oracle IDCS”

Making access easy but secure

So following on from my earlier article, Policies let your teams play safe, I have been given another challenge: Can we give our users single sign on now that each team can play safely in their own Oracle Cloud Infrastructure compartments?

Single sign on delivers a number of really important benefits. Firstly, the user experience is much smoother and seamless as users don’t get prompted for multiple passwords and don’t have to remember even more passwords. More importantly, single sign on eliminates the need to manage multiple stores of identities. This can be a big overhead for administrators and sometimes open up additional risks. Finally, an enterprise wide identity solution can often provide additional capabilities can be leveraged by your Oracle Cloud Infrastructure.

Continue reading “Making access easy but secure”