Thank you for responding, Mantas. I haven’t gotten around to checking this out.


From: Mantas Mikulėnas <<>>
Date: Tuesday, October 4, 2016 at 10:57 AM
To: Tyler Couto <<>>
Subject: Re: [systemd-devel] tomcat start up script wait for message

On Tue, Oct 4, 2016 at 8:32 PM, Tyler Couto 
<<>> wrote:
Hi all,

We have a tomcat application that requires some initialization after
tomcat starts up. That is, we run an initialize script after catalina.out
says ?'Server startup in:'. Currently we do this in a number of ways:
manually, through a custom tail script, or through logstash. But I¹m
thinking it might be best to let the init system do it. Is this a good
idea? And if so, how best to implement it?

systemd will not react to stdout messages, but it does have Type=notify which 
will react to a "READY=1" message sent via Unix socket – ideally directly by 
the program (see sd_notify, $NOTIFY_SOCKET) but also possibly via the 
`systemd-notify` tool:

    sd_notify(0, "READY=1");

    systemd-notify --ready

Mantas Mikulėnas <<>>
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