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• Application - A Lightning/web app (WPE runtime) or Lightning/Spark app (Spark runtime) loaded from the web.
• Thunder client - javascript client used by application
• WPE/Spark - Application Runtime Environments
• Thunder - Web Platform for Embedded Framework for services
• Security Agent - A thunder plugin.  Accessible only by COM/RPC only by application runtimes.
• Plugin1 - Represents any plugin used as a service.  Accessible by JSON/RPC
• thunder_permissions.conf - configuration for permissions of applications to access Thunder services.

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Figure 2.  Sequence Diagram

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