* In client ack mode, StompServer will only send one message at a time, waiting

for an ack for that message before sending another. Work around this:
  - batch up messages to sendmsg() and flush when there are more than 10 in the
    queue or there has been more than 1 second since flushing and the queue is
    non-empty

This increases the indexing rate by a factor of 6.

bin/agent.rb

@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby
+  #!/usr/bin/env ruby
 
 require 'rubygems'
 require 'lib/net/client'
@@ -12,6 +12,7 @@ class Agent < LogStash::Net::MessageClient
   def initialize(host, port)
     super(username="", password="", host=host, port=port)
     @hostname = Socket.gethostname
+    @msgs = []
   end # def initialize
 
   def start_log_watcher
@@ -30,14 +31,16 @@ class Agent < LogStash::Net::MessageClient
           line.chomp!
           index("httpd-access", line)
           count += 1
-          break if count >= 3
+          #break if count >= 3
         end
       rescue => e
         $stderr.puts e.inspect
         $stderr.puts caller.join("\n")
         raise e
       end
+      #close
     end
+    @t2.join
   end # def start_log_watcher
 
   def index(type, string)
@@ -51,12 +54,10 @@ class Agent < LogStash::Net::MessageClient
   end # def index
 
   def IndexEventResponseHandler(msg)
-    puts "OK"
   end # def IndexEventResponseHandler
 
   def run
     start_log_watcher
-    @t2.join
     super
   end
 end

lib/net/server.rb

@@ -6,9 +6,9 @@ require 'uuid'
 
 module LogStash; module Net
   class MessageServer < MessageSocket
-    def run
-      subscribe("logstash")
-      super
-    end
+    #def run
+      #subscribe("logstash")
+      #super
+    #end
   end # class MessageServer
 end; end # module LogStash::Net

lib/net/servers/indexer.rb

@@ -5,7 +5,6 @@ require 'lib/net/message'
 require 'lib/net/messages/indexevent'
 require 'lib/net/messages/search'
 require 'lib/net/messages/ping'
-
 require 'ferret'
 require 'lib/log/text'
 require 'config'
@@ -24,6 +23,11 @@ module LogStash; module Net; module Servers
       @starttime = Time.now
     end
 
+    def run
+      subscribe("logstash")
+      super
+    end
+
     def IndexEventRequestHandler(request)
       response = LogStash::Net::Messages::IndexEventResponse.new
       response.id = request.id

lib/net/socket.rb

@@ -22,14 +22,27 @@ module LogStash; module Net
       }
 
       @handler = self
+      @outbuffer = Hash.new { |h,k| h[k] = [] }
       subscribe(@id)
     end # def initialize
 
     def subscribe(name)
       #puts "Subscribing to #{name}"
       @stomp.subscribe("/queue/#{name}", @stomp_options) do |stompmsg|
-        obj = JSON::load(stompmsg.body)
-        message = Message.new_from_data(obj)
+        handle_message(stompmsg)
+      end # @stomp.subscribe
+    end # def subscribe
+
+    def handle_message(stompmsg)
+      obj = JSON::load(stompmsg.body)
+      if !obj.is_a?(Array)
+        obj = [obj]
+      end
+
+      #puts "Got #{obj.length} items"
+      obj.each do |item|
+        #puts item.inspect
+        message = Message.new_from_data(item)
         name = message.class.name.split(":")[-1]
         func = "#{name}Handler"
         #puts stompmsg
@@ -43,28 +56,54 @@ module LogStash; module Net
           # We should allow the message handler to defer acking if they want
           # For instance, if we want to index things, but only want to ack
           # things once we actually flush to disk.
-          @stomp.acknowledge stompmsg
         else
           $stderr.puts "#{@handler.class.name} does not support #{func}"
         end # if @handler.respond_to?(func)
-      end # @stomp.subscribe
-    end # def subscribe
+      end
+      @stomp.acknowledge stompmsg
+    end # def handle_message
 
     def run
+      @flusher = Thread.new { flusher }
       @stomp.join
     end
 
-    def sendmsg(destination, msg)
-      data = msg.to_json
+    def flusher
+      loop do
+        #puts @outbuffer.inspect
+        @outbuffer.each_key do |destination|
+          flushout(destination)
+        end
+        @outbuffer.clear
+        sleep 1
+      end
+    end
+
+    def flushout(destination)
+      msgs = @outbuffer[destination]
+      return if msgs.length == 0
+
+      data = msgs.to_json
       options = {
         "persistent" => true,
         "reply-to" => "/queue/#{@id}",
-        "ack" => "client",
       }
+      #puts "Flushing: #{data[0..40]}..."
       @stomp.send(destination, data, options)
+      msgs.clear
+    end
+
+    def sendmsg(destination, msg)
+      #puts "Sending to #{destination}: #{msg}"
+      @outbuffer[destination] << msg
+
+      if @outbuffer[destination].length > 10
+        flushout(destination)
+      end
     end
 
     def handler=(handler)
+      puts "Setting handler to #{handler.class.name}"
       @handler = handler
     end