Class: LogFetcher

Inherits:
Object
  • Object
show all
Defined in:
lib/zillabyte/common/log_fetcher.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LogFetcher 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 3

def initialize
  require("colorize")
  require("pty")
  @color_map = {}
  @all_colors = [:green, :yellow, :magenta, :cyan, :light_black, :light_green, :light_yellow, :light_blue, :light_magenta, :light_cyan]
  @terminate = false
  @pid = nil
end

Class Method Details

.fetch_logs(hash, operation = nil, exit_on = nil) ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 78

def self.fetch_logs(hash, operation=nil, exit_on=nil)
  lf = LogFetcher.new
  lf.run_sync(hash, operation, exit_on)
  lf
end

.fetch_logs_async(hash, operation = nil, exit_on = nil) ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 84

def self.fetch_logs_async(hash, operation=nil, exit_on=nil)
  lf = LogFetcher.new
  lf.start_async(hash, operation, exit_on)
  lf
end

Instance Method Details

#color_for(operation_name) ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 12

def color_for(operation_name)
  @color_map[operation_name] ||= @all_colors[ @color_map.size % @all_colors.size ]
  @color_map[operation_name]
end

#run_sync(hash, operation = nil, exit_on = nil) ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 19

def run_sync(hash, operation=nil, exit_on=nil)
  
  ip = hash["server"] || ENV["ZILLABYTE_API_HOST"] #Quick fix for logs on zilla machines
  exit_on = [exit_on] unless exit_on.is_a?(Array)

  @color_map = {}
  
  # TODO: (nitpick) we should use ruby instead of shelling to curl -- we can't guarantee curl will exist 
  cmd = "curl -G http://#{hash["flow"]}:#{hash["token"]}@#{ip}:#{hash["port"]}/getLogs?flow=#{hash["flow"]}"
  
  begin  
    PTY.spawn( cmd ) do |r, w, pid|
      @pid = pid;
      break if @terminate
      r.each do |line|
        begin
          op = line.match(/\[(.*?)\]/)[0].to_s[1...-1]
          
          op_name = op.split(".")[0]
          next if op_name != operation and operation != "_ALL_"
          line_split = line.split("[")
          print line_split[0] + "[" + op.colorize(color_for(op)) + line_split[1..-1].join("[")[op.length..-1] unless line.include?("[HIDDEN]")
          
          done = false
          exit_on.each do |exit_str|
            if line.include? exit_str
              done = true
              break
            end
          end
          break if done
        rescue Exception => e
          next
        end
      end
    end  
  rescue PTY::ChildExited => e  
  end  
end

#start_async(hash, operation, exit_on) ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 60

def start_async(hash, operation, exit_on)
  
  Signal.trap("SIGINT") do 
    self.stop()
    exit()
  end
  
  @thread = Thread.new do 
    run_sync(hash, operation, exit_on)
  end
end

#stop ⇒ Object 



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# File 'lib/zillabyte/common/log_fetcher.rb', line 72

def stop
  @terminate = true
  Process.kill("SIGKILL", @pid) rescue nil
end