Optionally disable Embedded Tomcat from starting

[rajdavies]

For some cases, where you are creating a non REST based funktion, it would be nice not to have embedded Tomcat start. Pondering best way to disable - property maybe ?

[jstrachan]

Agreed.

I think excluding the <artifactId>spring-boot-starter-web</artifactId> should be enough in the pom.xml. FWIW to fix funktionio/funktion#10 I recently switched from tomcat -> jetty so we could use the same servlet engine for camel http and the spring-boot-starter-web.

The only downside of disabling web is we lose actuator metrics and health REST access. Longer term maybe the jolokia agent could detect those and expose them over HTTP? Until then its probably easier to keep the spring-boot-starter-web dependency; even if its just used for metrics & health checks.

[davsclaus]

Yeah IMHO its good to standardize on /health over HTTP for health checks. I suspect its a tad to complicated to disable HTTP and then use something else as health check?

[jstrachan]

yeah - we currently tend to use jetty; though could use undertow instead to reduce the foot print a bit? We need a servlet engine for health checks though - plus for doing mvn fabric8:watch-spring-boot so its very handy!

[davsclaus]

Yeah I have switched funktion to use undertow

[davsclaus]

undertow should be fine