svn commit: r1588962 - /qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb

[mc...@apache.org]

Author: mcpierce
Date: Mon Apr 21 18:41:57 2014
New Revision: 1588962

URL: http://svn.apache.org/r1588962
Log:
PROTON-531: Ruby example - passive_recv.rb

The example uses passive mode to demonstrate how to write non-blocking
code in Ruby.

Added:
    qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb

Added: qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb
URL: http://svn.apache.org/viewvc/qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb?rev=1588962&view=auto
==============================================================================
--- qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb (added)
+++ qpid/proton/trunk/examples/messenger/ruby/passive_recv.rb Mon Apr 21 18:41:57 2014
@@ -0,0 +1,140 @@
+#!/usr/bin/env ruby
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'qpid_proton'
+require 'optparse'
+
+addresses = []
+
+OptionParser.new do |opts|
+  opts.banner = "Usage: recv.rb <addr1> ... <addrn>"
+  opts.parse!
+
+  addresses = ARGV
+end
+
+addresses = ["~0.0.0.0"] if addresses.empty?
+
+messenger = Qpid::Proton::Messenger.new
+messenger.passive = true
+
+begin
+  messenger.start
+rescue ProtonError => error
+  puts "ERROR: #{error.message}"
+  puts error.backtrace.join("\n")
+  exit
+end
+
+addresses.each do |address|
+  begin
+    messenger.subscribe(address)
+  rescue Qpid::Proton::ProtonError => error
+    puts "ERROR: #{error.message}"
+    exit
+  end
+end
+
+msg = Qpid::Proton::Message.new
+
+read_array = []
+write_array = []
+selectables = {}
+
+loop do
+
+  # wait for incoming messages
+  sel = messenger.selectable
+  while !sel.nil?
+    if sel.terminal? && sel.killable?
+      selectables.delete(sel.fileno)
+      read_array.delete(sel)
+      write_array.delete(sel)
+      sel.free
+    else
+      sel.capacity
+      sel.pending
+      if !sel.registered?
+        read_array << sel
+        write_array << sel
+        selectables[sel.fileno] = sel
+        sel.registered = true
+      end
+    end
+    sel = messenger.selectable
+  end
+
+  unless selectables.empty?
+    rarray = []; read_array.each {|fd| rarray << fd.to_io }
+    warray = []; write_array.each {|fd| warray << fd.to_io }
+
+    if messenger.deadline > 0.0
+      result = IO.select(rarray, warray, nil, messenger.deadline)
+    else
+      result = IO.select(rarray, warray)
+    end
+
+    unless result.nil? && result.empty?
+      result.flatten.each do |io|
+        sel = selectables[io.fileno]
+
+        sel.writable if sel.pending > 0
+        sel.readable if sel.capacity > 0
+      end
+    end
+
+    begin
+      messenger.receive(10)
+    rescue Qpid::Proton::ProtonError => error
+      puts "ERROR: #{error.message}"
+      exit
+    end
+
+    while messenger.incoming.nonzero?
+      begin
+        messenger.get(msg)
+      rescue Qpid::Proton::Error => error
+        puts "ERROR: #{error.message}"
+        exit
+      end
+
+      puts "Address: #{msg.address}"
+      subject = msg.subject || "(no subject)"
+      puts "Subject: #{subject}"
+      puts "Body: #{msg.body}"
+      puts "Properties: #{msg.properties}"
+      puts "Instructions: #{msg.instructions}"
+      puts "Annotations: #{msg.annotations}"
+
+      if msg.reply_to
+        puts "=== Sending a reply to #{msg.reply_to}"
+        reply = Qpid::Proton::Message.new
+        reply.address = msg.reply_to
+        reply.subject = "RE: #{msg.subject}"
+        reply.content = "Thanks for the message!"
+
+        messenger.put(reply)
+        messenger.send
+      end
+    end
+  end
+end
+
+messenger.stop
+



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