Get pid of application started by mvn exec plugin - unix

Question

I want to write .sh script that will kill process started by maven exec plugin. At the moment i'm trying to get PID by start time, but this approach do not guarantee that there is no some collision with other processes.
Please, could someone say whether there is an approach to get PID or to kill process started by mvn exec .
Thanks.

Answer 1

The best approach is to start the maven process using start-stop-daemon. I use a modified bash script from a tomcat init.d to start/stop java or maven programs as daemons. Here is a snippet. Please customize as needed:
#!/bin/sh
case "$1" in
start)
log_daemon_msg "Starting $DESC" "$NAME"
start-stop-daemon --start -b -u "$MAVEN_USER" -g "$MAVEN_GROUP" \
-c "$MAVEN_USER" -d "$MAVEN_HOME" -p "$MAVEN_PID" -m \
-x mvn -- exec:java -Dexec.mainClass="com.company.Application" -Dexec.classpathScope=runtime -Dexec.args="/home/user 192.168.1.1" 2>&1
status="$?"
set +a -e
else
log_progress_msg "(already running)"
log_end_msg 0
fi
;;
stop)
log_daemon_msg "Stopping $DESC" "$NAME"
set +e
if [ -f "$MAVEN_PID" ]; then
start-stop-daemon --stop --pidfile "$MAVEN_PID" \
--user "$MAVEN_USER" \
--retry=TERM/20/KILL/5 >/dev/null
if [ $? -eq 1 ]; then
log_progress_msg "$DESC is not running but pid file exists, cleaning up"
elif [ $? -eq 3 ]; then
PID="`cat $MAVEN_PID`"
log_failure_msg "Failed to stop $NAME (pid $PID)"
exit 1
fi
rm -f "$MAVEN_PID"
rm -rf "$JVM_TMP"
else
log_progress_msg "(not running)"
fi
log_end_msg 0
set -e
;;