#!/bin/bash

if [ -r /etc/zabbix/zabbix_java_gateway.conf ]; then
	. /etc/zabbix/zabbix_java_gateway.conf
fi

if [ -z $GATEWAY_HOME ]; then
	GATEWAY_HOME="/usr/share/zabbix-java-gateway"
fi

if [ -r "/etc/sysconfig/zabbix-java-gateway" ]; then
	. /etc/sysconfig/zabbix-java-gateway
fi

if [ -n "$PID_FILE" -a -f "$PID_FILE" ]; then
	PID=`cat "$PID_FILE"`
	if ps -p "$PID" > /dev/null 2>&1; then
		echo "Zabbix Java Gateway is already running"
		exit 1
	fi
	rm -f "$PID_FILE"
fi

JAVA=${JAVA:-java}
JAVA_OPTIONS="-server $JAVA_OPTIONS"
JAVA_OPTIONS="$JAVA_OPTIONS -Dlogback.configurationFile=/etc/zabbix/zabbix_java_gateway_logback.xml"

cd $GATEWAY_HOME

CLASSPATH="lib"
for jar in lib/*.jar bin/*.jar; do
	CLASSPATH="$CLASSPATH:$jar"
done

if [ -n "$PID_FILE" ]; then
	ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dzabbix.pidFile=$PID_FILE"
fi
if [ -n "$LISTEN_IP" ]; then
	ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dzabbix.listenIP=$LISTEN_IP"
fi
if [ -n "$LISTEN_PORT" ]; then
	ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dzabbix.listenPort=$LISTEN_PORT"
fi
if [ -n "$START_POLLERS" ]; then
	ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dzabbix.startPollers=$START_POLLERS"
fi
if [ -n "$TIMEOUT" ]; then
	ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dzabbix.timeout=$TIMEOUT"
fi

tcp_timeout=${TIMEOUT:=3}000
ZABBIX_OPTIONS="$ZABBIX_OPTIONS -Dsun.rmi.transport.tcp.responseTimeout=$tcp_timeout"

COMMAND_LINE="$JAVA $JAVA_OPTIONS -classpath $CLASSPATH $ZABBIX_OPTIONS com.zabbix.gateway.JavaGateway"

if [ -n "$PID_FILE" ]; then

	# check that the PID file can be created

	touch "$PID_FILE"
	if [ $? -ne 0 ]; then
		echo "Zabbix Java Gateway did not start: cannot create PID file"
		exit 1
	fi

	# start the gateway and output pretty errors to the console

	STDOUT=`$COMMAND_LINE & echo $! > "$PID_FILE"`
	if [ -n "$STDOUT" ]; then
		echo "$STDOUT"
	fi

	# verify that the gateway started successfully

	PID=`cat "$PID_FILE"`
	ps -p "$PID" > /dev/null 2>&1
	if [ $? -ne 0 ]; then
		echo "Zabbix Java Gateway did not start"
		rm -f "$PID_FILE"
		exit 1
	fi

else
	exec $COMMAND_LINE
fi