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Mads Kiilerich

docs: clarify that Session usually should be called - methods should not be used directly

Documentation based on clarification by Søren Løvborg:

Session is the factory/singleton manager, which tracks the current session (per
thread). To end the current session entirely and destroy the Session object, we
call remove on the manager (Session.remove()). (A new session will be created
on-demand.)

Session() returns the current session for the active thread (or creates a new
session, if there's none). commit is a method of the SQLAlchemy Session class,
thus called as Session().commit() ... it's a method call on the current Session
object, not the session factory/manager.

SQLAlchemy may have some hackery to allow Session.commit() to be called, and
the call automatically redirect to the actual Session object... but that's a
hack and should be avoided.

TL;DR: for remove, call it on Session; for everything else, call it on
Session().

#!/bin/bash
###########################################
#### THIS IS AN ARCH LINUX RC.D SCRIPT ####
###########################################

. /etc/rc.conf
. /etc/rc.d/functions

DAEMON=kallithea
APP_HOMEDIR="/srv"
APP_PATH="$APP_HOMEDIR/$DAEMON"
CONF_NAME="production.ini"
LOG_FILE="/var/log/$DAEMON.log"
PID_FILE="/run/daemons/$DAEMON"
APPL=/usr/bin/gearbox
RUN_AS="*****"

ARGS="serve --daemon \
--user=$RUN_AS \
--group=$RUN_AS \
--pid-file=$PID_FILE \
--log-file=$LOG_FILE \
-c $APP_PATH/$CONF_NAME"

[ -r /etc/conf.d/$DAEMON ] && . /etc/conf.d/$DAEMON

if [[ -r $PID_FILE ]]; then
    read -r PID < "$PID_FILE"
    if [[ $PID && ! -d /proc/$PID ]]; then
        unset PID
        rm_daemon $DAEMON
    fi
fi

case "$1" in
start)
    stat_busy "Starting $DAEMON"
    export HOME=$APP_PATH
    [ -z "$PID" ] && $APPL $ARGS &>/dev/null
    if [ $? = 0 ]; then
        add_daemon $DAEMON
        stat_done
    else
        stat_fail
        exit 1
    fi
    ;;
stop)
    stat_busy "Stopping $DAEMON"
    [ -n "$PID" ] && kill $PID &>/dev/null
    if [ $? = 0 ]; then
        rm_daemon $DAEMON
        stat_done
    else
        stat_fail
        exit 1
    fi
    ;;
restart)
    $0 stop
    sleep 1
    $0 start
    ;;
status)
    stat_busy "Checking $name status";
    ck_status $name
    ;;
*)
    echo "usage: $0 {start|stop|restart|status}"
esac