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.