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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Salesforce OAuth 2.0 JWT Bearer Token Flow Walk-Through

This document will walk you through how to create or configure a Salesforce application for use with JWT authentication. These configuration steps and the example code works as of Salesforce API version 42.0.

Prerequisites

Create an RSA x509 private key/certification pair

	/*
	* Apex doesn't expose dependent picklist info directly, but it's possible to expose.
	* Approach:
	* * Schema.PicklistEntry doesn't expose validFor tokens, but they are there, and can be accessed by serializing to JSON
	* (and then for convenience, deserializing back into an Apex POJO)
	* * validFor tokens are converted from base64 representations (e.g. gAAA) to binary (100000000000000000000)
	* each character corresponds to 6 bits, determined by normal base64 encoding rules.
	* * The binary bits correspond to controlling values that are active - e.g. in the example above, this dependent option
	* is available for the first controlling field only.
	*