Class: Winter::Service

Inherits:
Object
  • Object
show all
Defined in:
lib/winter/service/stop.rb,
lib/winter/service/build.rb,
lib/winter/service/fetch.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 161

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
  begin
    dsl = DSL.evaluate winterfile, options
  rescue Exception=>e
    $LOG.error e
    exit
  end
  dependencies = dsl[:dependencies]
  service = dsl[:config]['service']
  service_dir = File.join(WINTERFELL_DIR,RUN_DIR,service)
  #$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

      # re-evaluate the DSL to get new dependencies
      begin
        dsl = DSL.evaluate winterfile, options
      rescue Exception=>e
        $LOG.error e
        exit
      end
    end
  end
  
  #I hate waiting so this is going to become faster.
  max_threads = 10 #make this configurable later. 
  active_threads = 0 
  error = false
  Signal.trap("CHLD") do 
    #Reap everything you possibly can.
    begin
      pid, status = waitpid2(-1, Process::WNOHANG) 
      if pid
        active_threads -= 1 
        error = true if status.exitstatus > 0 
      end
      rescue Errno::ECHILD
        break 
    end while pid
  end

  dependencies.each do |dep|
    while (active_threads >= max_threads) do
      $LOG.debug "Total active threads: #{active_threads}"
      sleep 1 
    end
    if !File.exists?(File.join(dep.destination,dep.outputFilename))
      active_threads += 1
      fork do 
        #Get the dependency and Vomit up an error code if we fail
        #If we don't do this then the main proc has no idea the build
        # was garbage 
        exit 1 unless dep.get
      end
    else
      $LOG.info "Already have #{dep.outputFilename}"
    end
  end

  #wait for stragglers
  while (active_threads > 0) do 
    sleep 1 
    $LOG.debug "threads: #{active_threads}"
  end

  exit 99 if error
end

#felix_log_level(level) ⇒ Object 



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# File 'lib/winter/service/start.rb', line 176

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

#fetch_GAV(group, artifact, version, repos = []) ⇒ Object 



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# File 'lib/winter/service/fetch.rb', line 43

def fetch_GAV(group, artifact, version, repos=[])
  dep = Dependency.new
  dep.artifact      = artifact
  dep.group         = group
  dep.version       = version
  dep.repositories  = repos
  #dep.package       = options[:package] || 'jar'
  #dep.offline       = @options['offline'] || @options['offline'] == 'true'
  dep.transative    = true
  dep.destination   = File.join('.')

  dep.getMaven

  extract_jar "#{artifact}-#{version}.jar"
end

#fetch_url(url) ⇒ Object 



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# File 'lib/winter/service/fetch.rb', line 24

def fetch_url( url )

  begin
    uri = URI.parse(url)
    file = uri.path.split('/').last

    content = Net::HTTP.get uri
    File.open(file, 'w') do |file|
      file.write content
    end
  rescue Exception=>e
    $LOG.error "Could not fetch winter configuration from : #{url}"
    $LOG.debug e
    exit(-1)
  end

  extract_jar file
end

#find_java ⇒ Object 



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# File 'lib/winter/service/start.rb', line 108

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 122

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 = [ "exec #{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 172

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)
  begin
    dsl = DSL.evaluate winterfile, options
  rescue Exception=>e
    $LOG.error e
    exit
  end

  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
  
  if @config['daemonize']
    java_cmd <<  " 2>&1 " #"don't eat the log thats evil"
  else 
    java_cmd << " > #{@config['console']} 2>&1"
  end
  $LOG.debug java_cmd

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

  # 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)
  
  exec(java_cmd) if @config['daemonize'] #Let the child eat winter so things are awesome for daemontools
  #We never hit the past this point if  we went to daemonize mode.
  
  #If we're not trying to run as a daemon just fork and let the subprocess be eaten
  java_pid = fork do
    exec(java_cmd)
  end

  pid_file = File.open(File.join(@service_dir, "pid"), "w")
  pid = java_pid
  pid_file.write(pid)
  pid_file.close      

  $LOG.info "Started #{@config['service']} (#{pid})"
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
    
    if pid <= 0 
      running = "A pid of zero was found... something bad is going on" 
    else 
      begin
        Process.getpgid( pid )
        running = "Running"
      rescue Errno::ESRCH
        running = "Dangling pid file : #{f_pid}"
      end
    end
    services["#{service} (#{pid})"] = "#{running}"
  end

  return services
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={})
  begin
    tmp = DSL.evaluate winterfile, options
    config = tmp[:config]
    service = config['service']
  rescue Exception=>e
    $LOG.error e
    exit
  end

  @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
    pid_string = nil
    File.open(f_pid, "r") do |f|
      pid_string = f.read()
      pid = pid_string.to_i
    end

    #Send a TERM to the container if we have a non bogus pid
    if pid > 0 
      begin
        $LOG.info("Attempting to terminate #{pid}")
        Process.kill("TERM", pid)
      rescue => e
        $LOG.debug( e )
        $LOG.info("Unable to control process with pid #{pid}.")
        $LOG.info("Either your user has insufficent rights, or the process doesn't exist")
      end
      
      #Wait for things to stop. 
      begin 
        $LOG.info("Waiting for the process with pid #{pid} to stop")
        sleep 1 while Process.kill(0,pid)
      rescue => e
        $LOG.info("The container seems to have exited.")
      end
    else
      $LOG.info("An invalid pid value was found in the pid file. (\"#{pid_string}\" was parsed as #{pid})")
    end
    
    #If things worked (Or we couldn't find a pid)... then we're good to delete. 
    begin
      $LOG.info("Removing the pid file")
      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={} )
  begin
    DSL.evaluate winterfile, options
  rescue Exception=>e
    $LOG.error e
    exit
  end
end