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

Returns a new instance of LogFetcher.



3
4
5
6
7
8
9
10
 
# 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 



82
83
84
85
86
 
# File 'lib/zillabyte/common/log_fetcher.rb', line 82

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 



88
89
90
91
92
 
# File 'lib/zillabyte/common/log_fetcher.rb', line 88

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 



12
13
14
15
 
# 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 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# 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
      begin
        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
      rescue Errno::EIO => e
        # process has finished 
      end
    end  
  rescue PTY::ChildExited => e  
  end  
end

#start_async(hash, operation, exit_on) ⇒ Object 



64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/zillabyte/common/log_fetcher.rb', line 64

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 



76
77
78
79
 
# File 'lib/zillabyte/common/log_fetcher.rb', line 76

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