hmngwy · August 9, 2014 04:55 · Aug 9, 2014
diff --git a/languagetool b/languagetool
@@ -0,0 +1,105 @@
+#!/bin/sh
+#
+# init script for a Java application
+#
+
+# Check the application status
+#
+# This function checks if the application is running
+check_status() {
+
+  # Running ps with some arguments to check if the PID exists
+  # -C : specifies the command name
+  # -o : determines how columns must be displayed
+  # h : hides the data header
+  s=`ps -C 'java -cp /path/to/languagetool/languagetool-server.jar org.languagetool.server.HTTPServer --public --port 80' -o pid h`
+
+  # If somethig was returned by the ps command, this function returns the PID
+  if [ $s ] ; then
+    return $s
+  fi
+
+  # In any another case, return 0
+  return 0
+
+}
+
+# Starts the application
+start() {
+
+  # At first checks if the application is already started calling the check_status
+  # function
+  check_status
+
+  # $? is a special variable that hold the "exit status of the most recently executed
+  # foreground pipeline"
+  pid=$?
+
+  if [ $pid -ne 0 ] ; then
+    echo "The application is already started"
+    exit 1
+  fi
+
+  # If the application isn't running, starts it
+  echo -n "Starting application: "
+
+  # Redirects default and error output to a log file
+  java -cp /path/to/languagetool/languagetool-server.jar org.languagetool.server.HTTPServer --public --port 80 >> /path/to/languagetool.log 2>&1 &
+  echo "OK"
+}
+
+# Stops the application
+stop() {
+
+  # Like as the start function, checks the application status
+  check_status
+
+  pid=$?
+
+  if [ $pid -eq 0 ] ; then
+    echo "Application is already stopped"
+    exit 1
+  fi
+
+  # Kills the application process
+  echo -n "Stopping application: "
+  kill -9 $pid &
+  echo "OK"
+}
+
+# Show the application status
+status() {
+
+  # The check_status function, again...
+  check_status
+
+  # If the PID was returned means the application is running
+  if [ $? -ne 0 ] ; then
+    echo "Application is started"
+  else
+    echo "Application is stopped"
+  fi
+
+}
+
+# Main logic, a simple case to call functions
+case "$1" in
+  start)
+    start
+    ;;
+  stop)
+    stop
+    ;;
+  status)
+    status
+    ;;
+  restart|reload)
+    stop
+    start
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|restart|reload|status}"
+    exit 1
+esac
+
+exit 0