Lein-daemon is a lein plugin that starts a clojure process as a daemon. In version 0.3, it has been re-written to not depend on any 3rd party binaries.
To use, add a :daemon option to your project.clj, it looks like
:daemon { :name-of-service {:ns my.name.space
:pidfife "path-to-pidfile.pid"}}
The keys of the daemon map are the names of services that can be started at the command-line. Start a process with "lein daemon start :name-of-service". pidfile specifies where the pid file will be written. This path can be relative to the project directory, or absolute.
add lein-daemon to your leiningen project file, as a dev-dependency::
:dev-dependencies [[lein-daemon "0.3.1"]]
lein-daemon requires JNA to load the C standard library, so if you're using an uncommon JVM, you might need to install JNA on your box. If you're running Hotspot, you're probably fine.
Like "lein run", "lein daemon" will call a function named -main, in the namespace specified by :ns. Any additional command line arguments will be passed to -main.
Lein daemon currently has three commands, start, stop, check. Start with "lein daemon start :name-of-service". This will call the -main function in the specified ns, with no arguments. Extra arguments may also be specified, like "lein daemon start :service foo bar baz".
Stop the process with "lein daemon stop name-of-service". Daemon will use the pid file to identify which process to stop.
Check if the process is still running with "lein daemon check name-of-service".