Velocity setting entirely from command-line

[danizen]

I think it would be good in the collectors to support a velocity setting entirely at the command-line, so that someone starting it up can override what's in the variables files.

[essiembre]

This feature is now supported in version 3. You can pass JVM system properties when launching the application, like this:

-Dsome.variable=Example

You can rely on environment variables as well.

Variable naming resolution is quite flexible. As an example, a variable ${hostName} can be defined in any of the following ways when using system property/environment variables:

    hostName
    hostname
    HOST_NAME
    Host-Name
    host.name