MQTT publish action not available at startup

[wawa79 (Yann)]

Finally, I found a workaround by declaring items to hold the state of Mqtt and Pushover actions, putting them into a SYS_StartComplete group and setting them with CRON during startup.

The .item file:

Group:Switch:AND(ON,OFF)	SYS_StartComplete		"System start complete"	
Switch                      SYS_MQTT_Started		"MQTT started" 	    <automation>	(SYS_StartComplete, System)
Switch                      SYS_Pushover_Started	"Pushover Started" 	<automation>	(SYS_StartComplete, System)

The .rule file

var systemStarted = new Boolean(false)
var mqttStarted  = new Boolean(false)

rule "Notify OpenHAB started"
when
	System started 
then
    if(! systemStarted){
        systemStarted = true
        if(! mqttStarted) {SYS_MQTT_Started.postUpdate(OFF)}
    }
end

rule "Monitor MQTT action addon"
when
	Time cron "0/10 * * * * ?"
then
    if(! mqttStarted){
        try {
            publish("mybroker", "mydummychannel", "0")
        }
        finally {
            mqttStarted = true
            SYS_MQTT_Started.postUpdate(ON)
        }
    }
end	

rule "System start complete (push notification)"
when
	Item SYS_StartComplete changed to ON 
then
    SYS_Notification.sendCommand('Open HAB is actually started' + ';0;16;1;;;;')
end