OSGi Launcher and Sandbox Installer Demo

Build

gradlew clean build to build the project and copy the subproject bundles built to the launchers resources folder

Schema Design

https://github.com/corda/platform-eng-design/blob/lorcan/cpk-schema-design/core/corda-5/corda-5.0/osgi/cpk-schema-design.md

Launcher

Main.kt will:

• create a Hibernate session
• treat the defined resource dirs of bundles as CPK/Sandbox
• each dir saved as a CPK to DB
• all bundles in each dir saved to DB with a reference to it's CPK. For simplicity all main bundles dependencies are stored in one dir.
• launch an OSGi framework
• read "CPK"s from the DB, install the bundles to their own sandbox
• give all sandboxes visibility to each other
• start up all installed bundles from all sandboxes
• greetings, yo and log-reader bundles communicate in their activator classes via OSGi Declarative Services

Greetings Bundle

• exposes (an unused) public api com.example.osgi.grettings.api
• hides api impl as package private com.example.osgi.grettings.impl
• calls out to YoService OSGi service in activator at startup

Yo Bundle

• exposes OSGi service com.example.osgi.yo.service
• hides service impl com.example.osgi.yo.impl
• registers yo service OSGi framework in activator

Log reader Bundle

• additional example of OSGi Service
• centralises logging via the OSGi Logger Service
• other methods of logging are available. this was included for demo purposes.