Class: FileWatch::ObservingTail

Inherits:
Object
  • Object
show all
Includes:
TailBase
Defined in:
lib/filewatch/observing_tail.rb

Defined Under Namespace

Classes: NullListener, NullObserver

Constant Summary

Constants included from TailBase

TailBase::OPEN_WARN_INTERVAL

Instance Attribute Summary

Attributes included from TailBase

#logger

Instance Method Summary collapse

Methods included from TailBase

#close_file, #initialize, #quit, #sincedb_record_uid, #sincedb_write, #tail

Instance Method Details

#subscribe(observer = NullObserver.new) ⇒ Object 



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
62
63
64
65
 
# File 'lib/filewatch/observing_tail.rb', line 22

def subscribe(observer = NullObserver.new)
  @watch.subscribe(@opts[:stat_interval],
                   @opts[:discover_interval]) do |event, path|
    listener = observer.listener_for(path)
    case event
    when :create, :create_initial
      if @files.member?(path)
        @logger.debug? && @logger.debug("#{event} for #{path}: already exists in @files")
        next
      end
      if _open_file(path, event)
        listener.created
        observe_read_file(path, listener)
      end
    when :modify
      if !@files.member?(path)
        @logger.debug? && @logger.debug(":modify for #{path}, does not exist in @files")
        if _open_file(path, event)
          observe_read_file(path, listener)
        end
      else
        observe_read_file(path, listener)
      end
    when :delete
      @logger.debug? && @logger.debug(":delete for #{path}, deleted from @files")
      if @files[path]
        observe_read_file(path, listener)
        @files[path].close
      end
      listener.deleted
      @files.delete(path)
      @statcache.delete(path)
    when :timeout
      @logger.debug? && @logger.debug(":timeout for #{path}, deleted from @files")
      if (deleted = @files.delete(path))
        deleted.close
      end
      listener.timed_out
      @statcache.delete(path)
    else
      @logger.warn("unknown event type #{event} for #{path}")
    end
  end # @watch.subscribe
end