Initial Commit

server

@@ -0,0 +1,130 @@
+#!/usr/bin/env jruby
+require 'rubygems'
+require 'spoon'
+# ### Review : Fork will not work under JRuby
+# require 'daemons'
+# Daemons.run('./Services/core.rb')
+# require File.expand_path("./Services/core.rb",File.dirname(__FILE__))
+# Spoon.spawn File.expand_path("./Services/core.rb",File.dirname(__FILE__)), *ARGV
+
+# ### See : https://gist.github.com/ik5/448884
+EXEC      = File.expand_path("./Services/core.rb",File.dirname(__FILE__))
+PID_PATH  = File.expand_path("./System/Temporary/server.pid",File.dirname(__FILE__))
+WORK_PATH = File.expand_path("./System/Temporary",File.dirname(__FILE__))
+
+def create_pid(pid)
+  begin
+    open(PID_PATH, 'w') do |f|
+      f.puts pid
+    end
+  rescue => e
+    STDERR.puts "Error: Unable to open #{PID_PATH} for writing:\n\t" +
+        "(#{e.class}) #{e.message}"
+    exit!
+  end
+end
+
+def get_pid
+  pid = nil
+  begin
+    open(PID_PATH, 'r') do |f|
+      pid = f.readline
+      pid = pid.to_s.gsub(/[^0-9]/,'')
+    end
+  rescue => e
+    # STDERR.puts "Error: Unable to open #{PID_PATH} for reading:\n\t" +
+    #     "(#{e.class}) #{e.message}"
+  end
+  if pid
+    pid.to_i
+  else
+    pid
+  end
+end
+
+def remove_pidfile
+ begin
+   File.unlink(PID_PATH)
+  rescue => e
+    STDERR.puts "ERROR: Unable to unlink #{path}:\n\t" +
+      "(#{e.class}) #{e.message}"
+    exit
+  end
+end
+
+def process_exists?
+  begin
+    pid = get_pid
+    return false unless pid
+    Process.kill(0, pid)
+    true
+  rescue Errno::ESRCH, TypeError # "PID is NOT running or is zombied
+    false
+  rescue Errno::EPERM
+    STDERR.puts "No permission to query #{pid}!";
+  rescue => e
+    STDERR.puts "(#{e.class}) #{e.message}:\n\t" +
+      "Unable to determine status for #{pid}."
+    false
+  end
+end
+
+def stop
+    begin
+        pid = get_pid
+        STDERR.puts "pid : #{pid}"
+        while true do
+            Process.kill("TERM", pid)
+            Process.wait(pid)
+            sleep(0.1)
+        end
+        remove_pidfile
+        STDOUT.puts 'Stopped the process'
+    rescue Errno::ECHILD
+        remove_pidfile
+        STDOUT.puts 'Stopped the process'
+        #
+    rescue => e
+        STDERR.puts "unable to terminate process: (#{e.class}) #{e.message}"
+    end
+end
+
+def start
+    #   if process_exists?
+    #    STDERR.puts "The process #{EXEC} already running. Restarting the process"
+    #    stop
+    #   end
+    unless process_exists?
+        pid = Spoon.spawn EXEC, *ARGV
+        create_pid(pid)
+        # ### FIX : setsid not permitted EPERM error as www-data/etc
+        # Process.setsid
+        # at_exit do
+        #     remove_pidfile
+        # end
+    
+        Dir::chdir(WORK_PATH)
+        File::umask(0)
+        STDIN.reopen("/dev/null", 'r')
+        STDOUT.reopen("/dev/null", "w")
+        STDERR.reopen("/dev/null", "w")
+    end
+end
+
+if ARGV[0] == 'start'
+  start
+elsif ARGV[0] == 'stop'
+  stop
+elsif ARGV[0] == 'restart'
+  stop
+  start
+elsif ARGV[0] == 'status'
+  if File.exist?(PID_PATH)
+    puts "running"
+  else
+    puts "stopped"
+  end
+else
+  STDERR.puts "Usage: server <start|stop|restart | status>"
+  exit!
+end