Class: Eve::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/eve/application.rb

Constant Summary collapse

@@cmd_data = 
{
  "version" => [],
  "help" => [],
  "appid" => [],
  "shell" => [],
  "poll" => [ "set", "add", "rm" ],
  "event" => [],
  "remote" => [],
  "interrupt" => [],
  "register" => [ "add", "rm", "reload", "add-path", "rm-path", "path" ],
  "print" => [],
  "exit" => [],
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data = {}) ⇒ Application

Returns a new instance of Application.



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# File 'lib/eve/application.rb', line 22

def initialize(data = {})
  @redis = data[:redis] || Redis.new
  @console = Messenger.new( :display => data[:display] )
  @system_calls = Messenger.new( :display => data[:system_calls_display] || data[:display] )
  
  @message = Message.new(self)
  @poll = 5*60
  @poll_cmds = []
  @cmds = []
  @big_t = data[:big_t] || "1month"
  @mode = data[:mode] || :queue
  @server = data[:server] || "0.0.0.0"
  @port = data[:port] || "4848"
  @running = false
end

Instance Attribute Details

#big_t ⇒ Object

Returns the value of attribute big_t.



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# File 'lib/eve/application.rb', line 6

def big_t
  @big_t
end

#cmds ⇒ Object

Returns the value of attribute cmds.



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# File 'lib/eve/application.rb', line 6

def cmds
  @cmds
end

#console ⇒ Object

Returns the value of attribute console.



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# File 'lib/eve/application.rb', line 6

def console
  @console
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/eve/application.rb', line 6

def id
  @id
end

#message ⇒ Object

Returns the value of attribute message.



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# File 'lib/eve/application.rb', line 6

def message
  @message
end

#mode ⇒ Object

Returns the value of attribute mode.



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# File 'lib/eve/application.rb', line 6

def mode
  @mode
end

#poll ⇒ Object

Returns the value of attribute poll.



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# File 'lib/eve/application.rb', line 6

def poll
  @poll
end

#poll_cmds ⇒ Object

Returns the value of attribute poll_cmds.



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# File 'lib/eve/application.rb', line 6

def poll_cmds
  @poll_cmds
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/eve/application.rb', line 6

def port
  @port
end

#redis ⇒ Object

Returns the value of attribute redis.



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# File 'lib/eve/application.rb', line 6

def redis
  @redis
end

#server ⇒ Object

Returns the value of attribute server.



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# File 'lib/eve/application.rb', line 6

def server
  @server
end

#system_calls ⇒ Object

Returns the value of attribute system_calls.



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# File 'lib/eve/application.rb', line 6

def system_calls
  @system_calls
end

Class Method Details

.alive?(id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/eve/application.rb', line 420

def self.alive?(id)
  return false if id == "" || id.nil?
  begin
    Process.kill 0, id.to_i
    true
  rescue Exception => ex
    false
  end
end

.extract_arg(name, args, default = [], has_data = true) ⇒ Object 



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# File 'lib/eve/application.rb', line 43

def self.extract_arg(name,args,default = [],has_data = true)
  is_multi = default.kind_of?(Array)
  index = args.index(name)
  return default if index.nil?
  return is_multi ? [true] : true unless has_data
  
  results = []
  args.each_with_index.collect { |d,i| d == name ? i : nil }.compact.each do |index|
    val = ""
    args[index+1..-1].each do |data|
      break if data.start_with?("--")
      val += " #{data}"
    end
    results << val.strip
  end
  is_multi ? results : results.first
end

.ids(redis = Redis.new) ⇒ Object 



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# File 'lib/eve/application.rb', line 416

def self.ids(redis = Redis.new)
  redis.smembers("Eve.ApplicationIds")
end

.methodize(input) ⇒ Object 



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# File 'lib/eve/application.rb', line 61

def self.methodize(input)
  input.gsub(/-/,"_")
end

Instance Method Details

#call_appid(result, appid, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 203

def call_appid(result,appid,display_messages)
  @id = appid == "" || appid.nil? ? $$.to_s : appid
  
  is_existing = @redis.sismember("Eve.ApplicationIds",@id)
  @redis.sadd("Eve.ApplicationIds",@id)
  result[:data] = @id
  @message.print_appid(@id)
  cmd("register reload",display_messages) if is_existing
  result
end

#call_event(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 294

def call_event(result, data, display_messages)
  @mode = :event
  @server,@port = data.split(":")
  @server ||= "0.0.0.0"
  @port ||= "4848"
  result[:data] = { :server => @server, :port => @port }
  @message.print_event_mode("#{@server}:#{@port}") if display_messages
  result
end

#call_exit(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 251

def call_exit(result,data,display_messages)
  result[:status] = :exited
  @message.print_exit if display_messages
  result
end

#call_help(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 220

def call_help(result,data,display_messages)

  if data.nil? || data == ""
    result[:data] = @@cmd_data.dup
    @redis.smembers(lookup_id("registers")).each do |name|
      clazz = reg(name)
      if clazz.nil?
        @redis.srem(lookup_id("registers"),name)
      else
        result[:data].merge!(clazz.available)
      end
    end
  else
    clazz = reg(data)
    if clazz.nil?
      @message.print_unknown_handler(data) if display_messages
      result[:data] = {}
    else
      result[:data] = clazz.available  
    end
  end
  @message.print_help(result[:data],data) if display_messages && !result[:data].empty?
  result
end

#call_interrupt(result, appid, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 98

def call_interrupt(result,appid,display_messages)
  @redis.set(lookup_id("mode",appid),"shell")
  @message.print_app_interrupted(appid) if display_messages
  result
end

#call_poll(result, duration, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 257

def call_poll(result,duration,display_messages)
  result[:data] = @poll_cmds
  @message.print_poll_details(@poll,result[:data])
  result
end

#call_poll_add(result, cmd, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 263

def call_poll_add(result,cmd,display_messages)
  @poll_cmds << cmd
  result
end

#call_poll_rm(result, index, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 268

def call_poll_rm(result,index,display_messages)
  result[:data] = []
  if index.to_i.to_s == index
    @poll_cmds.delete_at(index.to_i)
  else
    @poll_cmds.delete(index)
  end
  result
end

#call_poll_set(result, duration, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 278

def call_poll_set(result,duration,display_messages)
  @mode = :poll
  in_secs = WatchMe::Timer.to_seconds(duration)
  result[:data] = in_secs
  @poll = in_secs
  @message.print_poll_mode(@id,in_secs) if display_messages
  result
end

#call_print(result, msg, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 245

def call_print(result,msg,display_messages)
  result[:data] = msg
  @console.print("#{msg}\n") if display_messages
  result
end

#call_register(result, data, display_messages) ⇒ Object

CALLER METHODS



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# File 'lib/eve/application.rb', line 137

def call_register(result,data,display_messages)
  result[:data] = {}
  @redis.smembers(lookup_id("registers")).collect do |classname|
    result[:data][classname] = @redis.smembers(lookup_id("register.#{classname}.files"))
  end
  @message.print_registry(result[:data])
  result
end

#call_register_add(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 146

def call_register_add(result,data,display_messages)
  parts = data.split
  classname = parts[0]
  filename = parts[1]
  if filename.nil? || filename == ""
    (cmd("register path",false)[:data]).each do |path|
      filename = "#{path}/#{classname.split("::").last.underscore}.rb"
      next unless p?(filename)
      filename = p(filename)
      break
    end
  end
  load filename  
  @redis.sadd(lookup_id("registers"),classname)
  @redis.sadd(lookup_id("register.#{classname}.files"),filename)
  result[:data] = true
  result
end

#call_register_add_path(result, path, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 165

def call_register_add_path(result,path,display_messages)
  if p?(path)
    result[:data] = @redis.sadd(lookup_id("register.paths"),p(path))
  else
    result[:data] = false
  end
  result
end

#call_register_path(result, path, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 180

def call_register_path(result,path,display_messages)
  result[:data] = [ p("#{File.dirname(__FILE__)}/../registry") ] + @redis.smembers(lookup_id("register.paths"))
  @message.print_registry_path(result[:data]) if display_messages
  result
end

#call_register_reload(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 192

def call_register_reload(result,data,display_messages)
  @redis.smembers(lookup_id("registers")).each do |classname|
    @redis.smembers(lookup_id("register.#{classname}.files")).each do |filename|
      load filename
    end
  end
  @message.print_registry_reloaded if display_messages
  result[:data] = true
  result
end

#call_register_rm(result, classname, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 186

def call_register_rm(result,classname,display_messages)
  result[:data] = @redis.srem(lookup_id("registers"),classname)
  @redis.del(lookup_id("register.#{classname}.files"))
  result
end

#call_register_rm_path(result, path, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 174

def call_register_rm_path(result,path,display_messages)
  normalized_path = p?(path) ? p(path) : path
  result[:data] = @redis.srem(lookup_id("register.paths"),normalized_path)
  result
end

#call_remote(result, cmd, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 304

def call_remote(result, cmd, display_messages)
  should_exit = false
  begin
    @telnet ||= Net::Telnet::new("Host" => @server, "Port" => @port, "Timeout" => 10, "Telnetmode" => false) # debugging "Output_log"=>"application_telnet.log"
    if cmd == "exit"
      should_exit = true
      @telnet.close
    else
      result[:data] = @telnet.cmd(cmd) do |data|
        data.sub!(/[^\n]*> $/,"") unless @running
        @console.print data  
      end
    end
  rescue Exception => ex
    @message.print_error("Telnet session failed", ex)
    should_exit = true
  end
  
  if should_exit
    @mode = :shell
    cmd("exit",display_messages)
    result[:status] = :exited
  end
  
  result
end

#call_shell(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 287

def call_shell(result,data,display_messages)
  @mode = :shell
  result[:data] = @mode
  @message.print_shell_mode if display_messages
  result
end

#call_version(result, data, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 214

def call_version(result,data,display_messages)
  result[:data] = Eve::VERSION
  @message.print_version(@id) if display_messages
  result
end

#cmd(raw, display_messages = true, external_cmd = false) ⇒ Object 



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# File 'lib/eve/application.rb', line 104

def cmd(raw,display_messages = true,external_cmd = false)
  result = default_result
  raw = "remote #{raw}" if @mode == :event
  begin
    action, data = action_and_input(raw)
  
    num_times_processed = 0
    if @@cmd_data.keys.include?(action)
      inner_action, inner_data = action_and_input(data)
      if @@cmd_data[action].include?(inner_action)
        result = send(Application.methodize("call_#{action}_#{inner_action}"), result, inner_data, display_messages)  
      else
        result = send(Application.methodize("call_#{action}"), result, data, display_messages)  
      end
      num_times_processed += 1
    end
    num_times_processed, result = delegate(num_times_processed,result,raw,display_messages) unless @id.nil?
    
    if num_times_processed == 0 && !action.empty?
      @message.print_unknown_cmd(raw)
    end
    
    @cmds << raw if external_cmd && result[:track_cmd]
  rescue Exception => ex
    @message.print_cmd_error(raw,ex)
  end
  result
end

#default_result ⇒ Object 



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# File 'lib/eve/application.rb', line 65

def default_result
  { :data => nil, :status => :continue, :track_cmd => true }
end

#delegate(num_times_processed, result, cmd, display_messages) ⇒ Object 



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# File 'lib/eve/application.rb', line 344

def delegate(num_times_processed,result,cmd,display_messages)
  all_results = num_times_processed > 0 ? [ result.dup ] : []
  @redis.smembers(lookup_id("registers")).each do |classname|
    all_names = classname.split("::")
    clazz = reg(classname)
    next unless clazz.handle?(cmd)
    all_results << clazz.handle(self,cmd,display_messages)
    num_times_processed += 1
  end
  result[:data] = nil if num_times_processed == 0
  result[:data] = all_results[0][:data] if num_times_processed == 1
  result[:data] = all_results if num_times_processed > 1
  [ num_times_processed, result ]
end

#enqueue_cmd(raw) ⇒ Object 



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# File 'lib/eve/application.rb', line 359

def enqueue_cmd(raw)
  @redis.rpush(lookup_id("next_cmds"),raw)
end

#handle_args(args) ⇒ Object 



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# File 'lib/eve/application.rb', line 379

def handle_args(args)
  scripts = []
  
  is_event = false
  Application.extract_arg("--event",args).each do |event|
    is_event = true
    scripts << "event #{event}"
  end

  index = args.index("--interrupt")
  unless index.nil?
    scripts << "interrupt #{args[index+1]}"
    scripts << "exit"
    return scripts
  end

  index = args.index("--id")
  if !index.nil?
    scripts << "appid #{args[index + 1]}"
  elsif @id.nil? && !is_event
    scripts << "appid"
  end
  
  Application.extract_arg("--register",args).each { |register| scripts << "register add #{register}" }

  unless is_event
    Application.extract_arg("--poll",args).each { |poll| scripts << "poll #{poll}" }
    scripts << "shell" unless Application.extract_arg("--shell",args,nil,false).nil?
  end

  Application.extract_arg("--run",args).each do |cmd|
    scripts << cmd
  end

  scripts
end

#history ⇒ Object 



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# File 'lib/eve/application.rb', line 436

def history
  @console.history
end

#lookup_id(sub_id, appid = nil) ⇒ Object 



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# File 'lib/eve/application.rb', line 430

def lookup_id(sub_id, appid = nil)
  raise "Application ID not set yet" if appid.nil? && @id.nil?
  appid ||= @id
  "Eve.#{appid}.#{sub_id}"
end

#next_cmds(scripts = []) ⇒ Object 



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# File 'lib/eve/application.rb', line 363

def next_cmds(scripts = [])
  case(@mode)
    when :event
      scripts << user_input
    when :poll
      scripts += @poll_cmds
      scripts << "sleep #{@poll}"
    when :shell
      scripts << user_input
    when :queue
      the_cmd = @redis.lpop(lookup_id("next_cmds")) || "exit"
      scripts << the_cmd
  end
  scripts
end

#post_init ⇒ Object

EVENT MACHINE



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# File 'lib/eve/application.rb', line 73

def post_init
  @message.print_server_init
end

#receive_data(data) ⇒ Object 



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# File 'lib/eve/application.rb', line 77

def receive_data(data)
  cmd(data,true,true)
end

#reg(classname) ⇒ Object

HELPER METHODS



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# File 'lib/eve/application.rb', line 335

def reg(classname)
  begin
    all_names = classname.split("::")
    all_names.size == 1 ? Object::const_get(classname) : eval(all_names[0...-1].join("::")).const_get(all_names.last)
  rescue
    nil
  end
end

#reset ⇒ Object 



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# File 'lib/eve/application.rb', line 38

def reset
  @cmds = []
  @console.reset
end

#run(args = []) ⇒ Object

MAIN DRIVER - RUN / CMD



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# File 'lib/eve/application.rb', line 85

def run(args = [])
  @running = true
  scripts = ["version"] + handle_args(args)
  loop do
    scripts.each do |script|
      status = cmd(script,true,true)[:status]
      status = cmd("exit") if status == :should_exit
      return if status == :exited
    end
    scripts = next_cmds
  end
end

#system_call(input) ⇒ Object 



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# File 'lib/eve/application.rb', line 440

def system_call(input)
  @message.print_system_call(input)
  `#{input}`
end

#user_input ⇒ Object 



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# File 'lib/eve/application.rb', line 445

def user_input
  @console.print "> " unless @mode == :event
  STDOUT.flush
  STDIN.gets.chomp
end