`class Keyed`

Tracks a key/value pair such that unmarked keys can be identified and cleaned up. This helps implement persistent processes that start up child processes per directory or configuration file. If those directories and/or configuration files are removed, the child process can then be cleaned up automatically, because those key/value pairs will not be marked when reloading the container.

Definitions

`def initialize(key, value)`

Initialize the keyed instance

Signature

parameter　key　Object: The key.
parameter　value　Object: The value.

Implementation

def initialize(key, value)
	@key = key
	@value = value
	@marked = true
end

`attr :key`

Signature

attribute　Object: The key value, normally a symbol or a file-system path.

`attr :value`

Signature

attribute　Object: The value, normally a child instance.

`def marked?`

Signature

returns　Boolean: True if the instance has been marked, during reloading the container.

Implementation

def marked?
	@marked
end

`def mark!`

Mark the instance. This will indiciate that the value is still in use/active.

Implementation

def mark!
	@marked = true
end

`def clear!`

Clear the instance. This is normally done before reloading a container.

Implementation

def clear!
	@marked = false
end

`def stop?`

Stop the instance if it was not marked.

Signature

returns　Boolean: True if the instance was stopped.

Implementation

def stop?
	unless @marked
		@value.stop
		return true
	end
end