Class: Jettywrapper

Inherits:
Object
  • Object
show all
Includes:
ActiveSupport::Benchmarkable, Singleton
Defined in:
lib/jettywrapper.rb,
lib/jettywrapper/version.rb

Overview

Jettywrapper is a Singleton class, so you can only create one jetty instance at a time.

Constant Summary collapse

VERSION = 
"2.0.0"

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ Jettywrapper

configure the singleton with some defaults



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# File 'lib/jettywrapper.rb', line 31

def initialize(params = {})
  self.base_path = self.class.app_root
end

Class Attribute Details

.env ⇒ Object 



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# File 'lib/jettywrapper.rb', line 112

def env
  @env ||= begin
    case
    when ENV['JETTYWRAPPER_ENV']
      ENV['JETTYWRAPPER_ENV']
    when defined?(Rails) && Rails.respond_to?(:env)
      Rails.env
    when ENV['RAILS_ENV']
      ENV['RAILS_ENV']
    when ENV['environment']
      ENV['environment']
    else
      default_environment
    end
  end
end

.hydra_jetty_version ⇒ Object 



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# File 'lib/jettywrapper.rb', line 41

def hydra_jetty_version
  @hydra_jetty_version ||= 'v8.1.1'
end

.jetty_dir ⇒ Object 



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# File 'lib/jettywrapper.rb', line 58

def jetty_dir
  @jetty_dir ||= 'jetty'
end

.tmp_dir ⇒ Object 



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# File 'lib/jettywrapper.rb', line 50

def tmp_dir
  @tmp_dir ||= 'tmp'
end

.url ⇒ Object 



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# File 'lib/jettywrapper.rb', line 45

def url
  @url ||= defined?(ZIP_URL) ? ZIP_URL : "https://github.com/projecthydra/hydra-jetty/archive/#{hydra_jetty_version}.zip"
  @url
end

Instance Attribute Details

#base_path ⇒ Object

The root of the application. Used for determining where log files and PID files should go.



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# File 'lib/jettywrapper.rb', line 26

def base_path
  @base_path
end

#java_opts ⇒ Object

Options to pass to java (ex. [“-Xmx512mb”, “-Xms128mb”])



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# File 'lib/jettywrapper.rb', line 27

def java_opts
  @java_opts
end

#jetty_home ⇒ Object

Jetty’s home directory



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# File 'lib/jettywrapper.rb', line 21

def jetty_home
  @jetty_home
end

#jetty_opts ⇒ Object

Options to pass to jetty (ex. [“etc/my_jetty.xml”, “etc/other.xml”] as in wiki.eclipse.org/Jetty/Reference/jetty.xml_usage



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# File 'lib/jettywrapper.rb', line 28

def jetty_opts
  @jetty_opts
end

#port ⇒ Object

Jetty’s port. Default is 8888. Note that attribute is named port, but params passed in expect :jetty_port



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# File 'lib/jettywrapper.rb', line 22

def port
  @port
end

#quiet ⇒ Object

true (default) to reduce Jetty’s output



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# File 'lib/jettywrapper.rb', line 24

def quiet
  @quiet
end

#solr_home ⇒ Object

Solr’s home directory. Default is jetty_home/solr



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# File 'lib/jettywrapper.rb', line 25

def solr_home
  @solr_home
end

#startup_wait ⇒ Object

How many seconds to wait for jetty to spin up. Default is 5.



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# File 'lib/jettywrapper.rb', line 23

def startup_wait
  @startup_wait
end

Class Method Details

.app_root ⇒ Object 



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# File 'lib/jettywrapper.rb', line 105

def app_root
  return @app_root if @app_root
  @app_root = Rails.root if defined?(Rails) and defined?(Rails.root)
  @app_root ||= APP_ROOT if defined?(APP_ROOT)
  @app_root ||= '.'
end

.clean ⇒ Object 



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# File 'lib/jettywrapper.rb', line 93

def clean
  system "rm -rf #{jetty_dir}"
  unzip
end

.configure(params = {}) ⇒ Object

Set the jetty parameters. It accepts a Hash of symbols.



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# File 'lib/jettywrapper.rb', line 171

def configure(params = {})
  jetty_server = self.instance
  jetty_server.reset_process!
  jetty_server.quiet = params[:quiet].nil? ? true : params[:quiet]

  jetty_server.jetty_home = params[:jetty_home] || File.expand_path(File.join(app_root, 'jetty'))
  jetty_server.solr_home = params[:solr_home]  || File.join( jetty_server.jetty_home, "solr")
  jetty_server.port = params[:jetty_port] || 8888
  jetty_server.startup_wait = params[:startup_wait] || 5
  jetty_server.java_opts = params[:java_opts] || []
  jetty_server.jetty_opts = params[:jetty_opts] || []
  return jetty_server
end

.default_environment ⇒ Object 



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# File 'lib/jettywrapper.rb', line 129

def default_environment
  'development'
end

.download(url = nil) ⇒ Object 



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# File 'lib/jettywrapper.rb', line 62

def download(url = nil)
  return if File.exists? zip_file
  self.url = url if url
  logger.info "Downloading jetty at #{self.url} ..."
  FileUtils.mkdir tmp_dir unless File.exists? tmp_dir
  system "curl -L #{self.url} -o #{zip_file}"
  abort "Unable to download jetty from #{self.url}" unless $?.success?
end

.expanded_zip_dir(tmp_save_dir) ⇒ Object 



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# File 'lib/jettywrapper.rb', line 87

def expanded_zip_dir(tmp_save_dir)
  # This old way is more specific, but won't work for blacklight-jetty
  #expanded_dir = Dir[File.join(tmp_save_dir, "hydra-jetty-*")].first
  Dir[File.join(tmp_save_dir, "*")].first
end

.is_jetty_running?(params) ⇒ Boolean

Determine whether the jetty at the given jetty_home is running

Examples:

Jettywrapper.is_jetty_running?(:jetty_home => '/path/to/jetty')



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# File 'lib/jettywrapper.rb', line 253

def is_jetty_running?(params)
  Jettywrapper.configure(params)
  pid = Jettywrapper.instance.pid
  return false unless pid
  true
end

.is_pid_running?(pid) ⇒ Boolean

Check to see if the pid is actually running. This only works on unix.



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# File 'lib/jettywrapper.rb', line 297

def is_pid_running?(pid)
  begin
    return Process.getpgid(pid) != -1
  rescue Errno::ESRCH
    return false
  end
end

.is_port_in_use?(port) ⇒ Boolean

Check to see if the port is open so we can raise an error if we have a conflict

Examples:

Jettywrapper.is_port_open?(8983)



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# File 'lib/jettywrapper.rb', line 277

def is_port_in_use?(port)
  begin
    Timeout::timeout(1) do
      begin
        s = TCPSocket.new('127.0.0.1', port)
        s.close
        return true
      rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
        return false
      rescue
        return false
      end
    end
  rescue Timeout::Error
  end

  return false
end

.load_config(config_name = env) ⇒ Object 



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# File 'lib/jettywrapper.rb', line 133

def load_config(config_name = env)
  @env = config_name
  jetty_file = "#{app_root}/config/jetty.yml"

  unless File.exists?(jetty_file)
    logger.warn "Didn't find expected jettywrapper config file at #{jetty_file}, using default file instead."
    jetty_file = File.expand_path("../config/jetty.yml", File.dirname(__FILE__))
  end

  begin
    jetty_erb = ERB.new(IO.read(jetty_file)).result(binding)
  rescue
    raise("jetty.yml was found, but could not be parsed with ERB. \n#{$!.inspect}")
  end

  begin
    jetty_yml = YAML::load(jetty_erb)
  rescue
    raise("jetty.yml was found, but could not be parsed.\n")
  end

  if jetty_yml.nil? || !jetty_yml.is_a?(Hash)
    raise("jetty.yml was found, but was blank or malformed.\n")
  end

  config = jetty_yml.with_indifferent_access
  config[config_name] || config['default'.freeze]
end

.logger ⇒ Object

If ::Rails.logger is defined and is not nil, it will be returned. If no logger has been defined, a new STDOUT Logger will be created.



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# File 'lib/jettywrapper.rb', line 311

def logger
  @@logger ||= defined?(::Rails) && Rails.logger ? ::Rails.logger : ::Logger.new(STDOUT)
end

.logger=(logger) ⇒ Object 



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# File 'lib/jettywrapper.rb', line 305

def logger=(logger)
  @@logger = logger
end

.pid(params) ⇒ Fixnum

Return the pid of the specified jetty, or return nil if it isn’t running

Examples:

Jettywrapper.pid(:jetty_home => '/path/to/jetty')



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# File 'lib/jettywrapper.rb', line 265

def pid(params)
  Jettywrapper.configure(params)
  pid = Jettywrapper.instance.pid
  return nil unless pid
  pid
end

.reset_config ⇒ Object 



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# File 'lib/jettywrapper.rb', line 98

def reset_config
  @app_root = nil
  @env = nil
  @url = nil
  @hydra_jetty_version = nil
end

.start(params) ⇒ Object

Convenience method for configuring and starting jetty with one command

Examples:

Jettywrapper.start(:jetty_home => '/path/to/jetty', :jetty_port => '8983')



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# File 'lib/jettywrapper.rb', line 228

def start(params)
  unzip unless File.exists? jetty_dir
  Jettywrapper.configure(params)
  Jettywrapper.instance.start
  return Jettywrapper.instance
end

.stop(params) ⇒ Jettywrapper.instance

Convenience method for configuring and starting jetty with one command. Note that for stopping, only the :jetty_home value is required (including other values won’t hurt anything, though).

Examples:

Jettywrapper.stop_with_params(:jetty_home => '/path/to/jetty')



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# File 'lib/jettywrapper.rb', line 242

def stop(params)
   Jettywrapper.configure(params)
   Jettywrapper.instance.stop
   return Jettywrapper.instance
end

.unzip ⇒ Object 



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# File 'lib/jettywrapper.rb', line 71

def unzip
  download unless File.exists? zip_file
  logger.info "Unpacking #{zip_file}..."
  tmp_save_dir = File.join tmp_dir, 'jetty_generator'
  system "unzip -d #{tmp_save_dir} -qo #{zip_file}"
  abort "Unable to unzip #{zip_file} into tmp_save_dir/" unless $?.success?

  # Remove the old jetty directory if it exists
  system "rm -r #{jetty_dir}" if File.directory?(jetty_dir)

  # Move the expanded zip file into the final destination.
  expanded_dir = expanded_zip_dir(tmp_save_dir)
  system "mv #{expanded_dir} #{jetty_dir}"
  abort "Unable to move #{expanded_dir} into #{jetty_dir}/" unless $?.success?
end

.wrap(params) ⇒ Object

Wrap the tests. Startup jetty, yield to the test task, capture any errors, shutdown jetty, and return the error.

Examples:

Using this method in a rake task

require 'jettywrapper'
desc "Spin up jetty and run tests against it"
task :newtest do
  jetty_params = {
    :jetty_home => "/path/to/jetty",
    :quiet => false,
    :jetty_port => 8983,
    :startup_wait => 30,
    :jetty_opts => "/etc/jetty.xml"
  }
  error = Jettywrapper.wrap(jetty_params) do
    Rake::Task["rake:spec"].invoke
    Rake::Task["rake:cucumber"].invoke
  end
  raise "test failures: #{error}" if error
end



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# File 'lib/jettywrapper.rb', line 204

def wrap(params)
  error = false
  jetty_server = self.configure(params)

  begin
    jetty_server.start
    yield
  rescue
    error = $!
    logger.error "*** Error starting jetty: #{error}"
  ensure
    # puts "stopping jetty server"
    jetty_server.stop
  end

  raise error if error

  return error
end

.zip_file ⇒ Object 



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# File 'lib/jettywrapper.rb', line 54

def zip_file
  ENV['JETTY_ZIP'] || File.join(tmp_dir, url.split('/').last)
end

Instance Method Details

#java_variables ⇒ Object 



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# File 'lib/jettywrapper.rb', line 326

def java_variables
  ["-Djetty.port=#{@port}",
   "-Dsolr.solr.home=#{Shellwords.escape(@solr_home)}"]
end

#jetty_command ⇒ Object

What command is being run to invoke jetty?



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# File 'lib/jettywrapper.rb', line 322

def jetty_command
  ["java", java_variables, java_opts, "-jar", "start.jar", jetty_opts].flatten
end

#jetty_home_to_pid_file(jetty_home) ⇒ String

Take the @jetty_home value and transform it into a legal filename

Examples:

/usr/local/jetty1 => _usr_local_jetty1.pid



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# File 'lib/jettywrapper.rb', line 443

def jetty_home_to_pid_file(jetty_home)
  begin
    jetty_home.gsub(/\//,'_') << "_#{self.class.env}" << ".pid"
  rescue Exception => e
    raise "Couldn't make a pid file for jetty_home value #{jetty_home}\n  Caused by: #{e}"
  end
end

#logger ⇒ Object

end of class << self



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# File 'lib/jettywrapper.rb', line 317

def logger
  self.class.logger
end

#pid ⇒ Object

the process id of the currently running jetty instance



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# File 'lib/jettywrapper.rb', line 463

def pid
  File.open( pid_path ) { |f| return f.gets.to_i } if File.exist?(pid_path)
end

#pid_dir ⇒ Object

The directory where the pid_file will be written



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# File 'lib/jettywrapper.rb', line 452

def pid_dir
  File.expand_path(File.join(base_path,'tmp','pids'))
end

#pid_file ⇒ Object

The file where the process ID will be written



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# File 'lib/jettywrapper.rb', line 435

def pid_file
  jetty_home_to_pid_file(@jetty_home)
end

#pid_file? ⇒ Boolean

Check to see if there is a pid file already



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# File 'lib/jettywrapper.rb', line 458

def pid_file?
  File.exist?(pid_path)
end

#pid_path ⇒ Object

The fully qualified path to the pid_file



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# File 'lib/jettywrapper.rb', line 429

def pid_path
  #need to memoize this, becasuse the base path could be relative and the cwd can change in the yield block of wrap
  @path ||= File.join(pid_dir, pid_file)
end

#process ⇒ Object 



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# File 'lib/jettywrapper.rb', line 386

def process
  @process ||= begin
     process = ChildProcess.build(*jetty_command)
     if self.quiet
       process.io.stderr = File.open(File.expand_path("jettywrapper.log"), "w+")
       process.io.stdout = process.io.stderr
       logger.warn "Logging jettywrapper stdout to #{File.expand_path(process.io.stderr.path)}"
     else
       process.io.inherit!
     end
     process.detach = true

     process
   end
end

#reset_process! ⇒ Object 



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# File 'lib/jettywrapper.rb', line 402

def reset_process!
  @process = nil
end

#start ⇒ Object

Start the jetty server. Check the pid file to see if it is running already, and stop it if so. After you start jetty, write the PID to a file. This is the instance start method. It must be called on Jettywrapper.instance You’re probably better off using Jettywrapper.start(:jetty_home => “/path/to/jetty”)

Examples:

Jettywrapper.configure(params)
Jettywrapper.instance.start
return Jettywrapper.instance



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# File 'lib/jettywrapper.rb', line 339

def start
  logger.debug "Starting jetty with these values: "
  logger.debug "jetty_home: #{@jetty_home}"
  logger.debug "jetty_command: #{jetty_command.join(' ')}"

  # Check to see if we can start.
  # 1. If there is a pid, check to see if it is really running
  # 2. Check to see if anything is blocking the port we want to use
  if pid
    if Jettywrapper.is_pid_running?(pid)
      raise("Server is already running with PID #{pid}")
    else
      logger.warn "Removing stale PID file at #{pid_path}"
      File.delete(pid_path)
    end
  end
  if Jettywrapper.is_port_in_use?(self.port)
    raise("Port #{self.port} is already in use.")
  end
  benchmark "Started jetty" do
    Dir.chdir(@jetty_home) do
      process.start
    end
    FileUtils.makedirs(pid_dir) unless File.directory?(pid_dir)
    begin
      f = File.new(pid_path,  "w")
    rescue Errno::ENOENT, Errno::EACCES
      f = File.new(File.join(base_path,'tmp',pid_file),"w")
    end
    f.puts "#{process.pid}"
    f.close
    logger.debug "Wrote pid file to #{pid_path} with value #{process.pid}"
    startup_wait!
  end
end

#startup_wait! ⇒ Object

Wait for the jetty server to start and begin listening for requests



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# File 'lib/jettywrapper.rb', line 376

def startup_wait!
  begin
  Timeout::timeout(startup_wait) do
    sleep 1 until (Jettywrapper.is_port_in_use? self.port)
  end
  rescue Timeout::Error
    logger.warn "Waited #{startup_wait} seconds for jetty to start, but it is not yet listening on port #{self.port}. Continuing anyway."
  end
end

#stop ⇒ Object

Instance stop method. Must be called on Jettywrapper.instance You’re probably better off using Jettywrapper.stop(:jetty_home => “/path/to/jetty”)

Examples:

Jettywrapper.configure(params)
Jettywrapper.instance.stop
return Jettywrapper.instance



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# File 'lib/jettywrapper.rb', line 412

def stop
  logger.debug "Instance stop method called for pid '#{pid}'"
  if pid
    if @process
      @process.stop
    else
      Process.kill("KILL", pid) rescue nil
    end

    begin
      File.delete(pid_path)
    rescue
    end
  end
end