Class: Winter::Service

Inherits:
Object
  • Object
show all
Defined in:
lib/winter/service/stop.rb,
lib/winter/service/build.rb,
lib/winter/service/start.rb,
lib/winter/service/status.rb,
lib/winter/service/validate.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Service

Returns a new instance of Service.



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# File 'lib/winter/service/start.rb', line 26

def initialize
  #put defaults here
  @config = {}
  @config['java_home']   = ENV['JAVA_HOME'] 
  @config['service']     = 'default'
  @config['log.level']   = 1
  @config['64bit']       = true
  @config['jvm.mx']      = '1g'
  @config['console']     = '/dev/null'
  @config['web.port']    = 8080
  @config['osgi.port']   = 6070
  @config['jdb.port']    = 6071
  @config['jmx.port']    = 6072
  @config['service.conf.dir']    = "conf"

  #@config['log.dir'] = File.join(WINTERFELL_DIR,RUN_DIR,@config['service'],'logs')
  @directives = {}
end

Instance Method Details

#add_directives(dir) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 202

def add_directives( dir )
  tmp = ""
  dir.each do |key, value|
    tmp << " -D"+Shellwords.escape(key)
    if value
      tmp << "="+Shellwords.escape(value.to_s)
    end
  end
  tmp
end

#build(winterfile, options) ⇒ Object 



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# File 'lib/winter/service/build.rb', line 23

def build(winterfile, options)
  #dsl = DSL.new options
  dsl = DSL.evaluate winterfile, options
  dependencies = dsl[:dependencies]
  service = dsl[:config]['service']
  service_dir = File.join(WINTERFELL_DIR,RUN_DIR,service)
  #$LOG.debug dependencies
  
  if options['clean'] and File.directory?(service_dir)
    s = Winter::Service.new
    stats = s.status
    if stats.size == 0
      FileUtils.rm_r service_dir
      $LOG.debug "Deleted service directory #{service_dir}"
    else
      stats.each do |srvs,status|
        if service == srvs && status !~ /running/i
          FileUtils.rm_r service_dir
          $LOG.debug "Deleted service directory #{service_dir}"
        end
      end
    end
  end
  
  #I hate waiting so this is going to become faster.
  max_threads = 10 #make this configurable later. 
  active_threads = 0 
  Signal.trap("CHLD") do 
    #Reap everything you possibly can.
    begin
      pid = waitpid(-1, Process::WNOHANG) 
      #puts "reaped #{pid}" if pid
      active_threads -= 1 if pid
      rescue Errno::ECHILD
        break 
    end while pid
  end

  dependencies.each do |dep|
    while (active_threads >= max_threads) do
      #puts "Total active threads: #{active_threads}"
      sleep 1 
    end
    active_threads += 1
    fork do 
      dep.getMaven
    end
  end
  #wait for stragglers
  sleep 1 while (active_threads > 0) 
end

#felix_log_level(level) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 217

def felix_log_level(level)
    if level =~ /[1-4]/
      return level
    end
    if !level.is_a? String
      return 1
    end
    case level.upcase
    when "ERROR"
      return 1
    when "WARN"
      return 2
    when "INFO"
      return 3
    when "DEBUG"
      return 4
    else
      return 1
    end
end

#find_java ⇒ Object 



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# File 'lib/winter/service/start.rb', line 149

def find_java
  if !@config['java_home'].nil? && File.exists?(File.join(@config['java_home'],'bin','java'))
    return File.join(@config['java_home'],'bin','java')
  end
  if !ENV['JAVA_HOME'].nil? && File.exists?(File.join(ENV['JAVA_HOME'],'bin','java'))
    return File.join(ENV['JAVA_HOME'],'bin','java')
  end
  env = `env java -version 2>&1`
  if env['version']
    return "java"
  end
  raise "JRE could not be found. Please set JAVA_HOME or configure java_home."
end

#generate_java_invocation ⇒ Object 



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# File 'lib/winter/service/start.rb', line 163

def generate_java_invocation
  java_bin = find_java

  felix_jar = File.join(@felix.destination,"#{@felix.artifact}-#{@felix.version}.#{@felix.package}")

  # start building the command
  cmd = [ "#{java_bin.shellescape} -server" ]
  cmd << (@config["64bit"]==true ? " -d64 -XX:+UseCompressedOops":'')
  cmd << " -XX:MaxPermSize=256m -XX:NewRatio=3"
  cmd << " -Xmx#{@config['jvm.mx']}" 
  cmd << opt("felix.fileinstall.dir", "#{@service_dir}/#{BUNDLES_DIR}")

  config_properties = File.join(@service_dir, "conf", F_CONFIG_PROPERTIES)
  cmd << opt("felix.config.properties", "file:" + config_properties)
  cmd << opt("felix.log.level", felix_log_level(@config['log.level']))

  # TODO remove these options when the logger bundle is updated to use the classpath
  logger_properties = File.join(@service_dir, "conf", F_LOGGER_PROPERTIES)
  logback_xml       = File.join(@service_dir, "conf", F_LOGBACK_XML)
  cmd << opt("log4j.configuration",       logger_properties)
  cmd << opt("logback.configurationFile", logback_xml)

  cmd << opt("web.port",         @config["web.port"])
  cmd << opt("osgi.port",        @config["osgi.port"])
  cmd << opt("log.dir",          @config['log.dir'])
  cmd << opt("service.conf.dir", File.join(@service_dir, "conf"))
  cmd << opt(OPT_BUNDLE_DIR,     "#{@service_dir}/bundles")
  cmd << add_directives( @directives )
  cmd << @config["osgi.shell.telnet.ip"]?" -Dosgi.shell.telnet.ip=#{@config["osgi.shell.telnet.ip"]}":''
  #cmd.push(add_code_coverage())
  cmd << (@config["jdb.port"] ? " -Xdebug -Xrunjdwp:transport=dt_socket,address=#{@config["jdb.port"]},server=y,suspend=n" : '')
  cmd << (@config["jmx.port"] ? " -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=#{@config["jmx.port"]} -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false" : '')
  cmd << " -cp #{@service_dir}/conf:#{felix_jar.to_s.shellescape} org.apache.felix.main.Main"
  cmd << " -b #{@service_dir}/libs"
  cmd << " #{@service_dir}/felix_cache"
    
  return cmd.join(" \\\n ")
end

#opt(key, value) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 213

def opt(key, value)
  " -D#{Shellwords.escape(key.to_s)}=#{Shellwords.escape(value.to_s)}"
end

#start(winterfile, options) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 45

def start(winterfile, options)
  dsl = DSL.evaluate winterfile, options
  dsl[:dependencies].each do |dep|
    $LOG.debug "dependency: #{dep.group}.#{dep.artifact}"
  end
  @felix = dsl[:felix]

  @config.merge! dsl[:config] # add Winterfile 'directive' commands
  @config.merge! options # overwrite @config with command-line options
  @config.each do |k,v|
    k = k.shellescape if k.is_a? String
    v = v.shellescape if v.is_a? String
  end
  $LOG.debug @config

  @service_dir = File.join(File.split(winterfile)[0],RUN_DIR,@config['service']).shellescape

  @config['log.dir'] = File.join(@service_dir,'logs')

  @directives.merge! dsl[:directives]

  java_cmd = generate_java_invocation
  java_cmd << " > #{@config['console']} 2>&1"
  $LOG.debug java_cmd

  # execute
  if( File.exists?(File.join(@service_dir, "pid")) )
    $LOG.error "PID file already exists. Is the process running?"
    exit
  end
  pid_file = File.open(File.join(@service_dir, "pid"), "w")

  # Normally, we'd just use Process.daemon for ruby 1.9, but for some
  # reason the OSGi container we're using crashes when the CWD is changed
  # to '/'. So, we'll just leave the CWD alone.
  #Process.daemon(Dir.getwd,nil)

  java_pid = fork do
    exec(java_cmd)
  end

  pid = java_pid
  pid = Process.pid if @config['daemonize'] 
  pid_file.write(pid)
  pid_file.close      

  $LOG.info "Started #{@config['service']} (#{pid})"

  if( @config['daemonize'] )
    stay_resident(java_pid,winterfile)
  end
end

#status ⇒ Object 



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# File 'lib/winter/service/status.rb', line 21

def status
  pid_files = Dir.glob(File.join(WINTERFELL_DIR,RUN_DIR, "**", "pid"))
  if( pid_files.length == 0 )
    #$LOG.info "No services are running."
    return {}
  end

  services = {}
  
  pid_files.each do |f_pid|
    service = f_pid.sub( %r{#{WINTERFELL_DIR}/#{RUN_DIR}/([^/]+)/pid}, '\1')
    pid_file = File.open(f_pid, "r")
    pid = pid_file.read().to_i
  
    begin
      Process.getpgid( pid )
      running = "Running"
    rescue Errno::ESRCH
      running = "Dangling pid file : #{f_pid}"
    end

    services["#{service} (#{pid})"] = "#{running}"
  end

  return services
end

#stay_resident(child_pid, winterfile) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 98

def stay_resident( child_pid, winterfile )
  interrupted = false

  #TERM, CONT STOP HUP ALRM INT and KILL
  Signal.trap("EXIT") do
    $LOG.debug "EXIT Terminating... #{$$}"
    interrupted = true
    begin
      stop winterfile
     # not working...
     # Process.getpgid child_pid 
     # Process.kill child_pid #skipped if process is alredy dead
    rescue
      $LOG.debug "Child pid (#{child_pid}) is already gone."
    end
  end
  Signal.trap("HUP") do
    $LOG.debug "HUP Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("TERM") do
    $LOG.debug "TERM Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("KILL") do
    $LOG.debug "KILL Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("CONT") do
    $LOG.debug "CONT Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("ALRM") do
    $LOG.debug "ALRM Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("INT") do
    $LOG.debug "INT Terminating... #{$$}"
    interrupted = true
  end
  Signal.trap("CHLD") do
    $LOG.debug "CHLD Terminating... #{$$}"
    interrupted = true
  end
  #Process.detach(pid)

  while 1
    exit 0 if interrupted
  end
end

#stop(winterfile = 'Winterfile', options = {}) ⇒ Object

stop winterfell service



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# File 'lib/winter/service/stop.rb', line 22

def stop(winterfile='Winterfile', options={})
  tmp = DSL.evaluate winterfile, options
  config = tmp[:config]
  service = config['service']

  @service_dir = File.join(File.split(winterfile)[0],RUN_DIR,service)
  f_pid = File.join(@service_dir, "pid")

  if File.exists?(f_pid)
    pid = nil;
    File.open(f_pid, "r") do |f|
      pid = f.read().to_i
    end

    begin
      Process.getpgid pid
      Process.kill("TERM", -Process.getpgid(pid))
    rescue
      $LOG.info( "Process #{pid} does not exist. Removing pid file." )
    end

    begin
      File.unlink(f_pid)
    rescue
      $LOG.error( "Error deleting PID file." )
    end
  else
    $LOG.error("Failed to find process Id file: #{f_pid}")
    false
  end
  true
end

#validate(winterfile = 'Winterfile', options = {}) ⇒ Object 



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# File 'lib/winter/service/validate.rb', line 21

def validate( winterfile='Winterfile', options={} )
  DSL.evaluate winterfile, options
end