Creating and using Oracle functions

Oracle's serverless platform is pretty simple and due to its adoption of open source Fn as the base underline platform, it avoids any vendor lock-in as well. It runs in five different steps:

1. Developing a function either locally or on an OCI cloud shell
2. Building and packaging the code using a container
3. Pushing the function image to the OCI registry
4. Configuring how this function will be triggered, either based on HTTP calling or an Event, Stream, or Timer
5. Paying for the code execution time only

The preceding workflow can be seen in the following diagram:

Figure 8.3 – Life cycle of Oracle Function

Once you've created the function and uploaded the image to the OCIR, you can invoke it in four ways:

• Developers can use the Fn CLI to invoke a function.
• Developers can use OCI SDKs to invoke a function.
• Developers can send a signed HTTP request to the invoking point...