Add readme and sample code

README.md

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+# R2DDS
+
+This repository contains a sample ruby script to read/write ShapeType samples to DDS.
+
+Using the DDS Dynamic API a Ruby language binding for DDS could be developed. A small proof of concept was created using the type specific data reader/writer but that would require C++ code generation for each new IDL defined type.

test/shapes/ShapeType.idl

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+/**
+ * @file   test.idl
+ * @author
+ *
+ * @brief  DDS Shapes example
+ *
+ * @copyright Copyright (c) Remedy IT Expertise BV
+ * Chamber of commerce Rotterdam nr.276339, The Netherlands
+ */
+
+#pragma DCPS_DATA_TYPE "ShapeType"
+#pragma DCPS_DATA_KEY "ShapeType color"
+
+struct ShapeType {
+  string color;
+  long x;
+  long y;
+  long shapesize;
+};
+

test/shapes/client.rb

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+#--------------------------------------------------------------------
+#
+# Author: Johnny Willemsen
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the R2DDS LICENSE which is
+# included with this program.
+#
+# Copyright (c) Remedy IT Expertise BV
+#--------------------------------------------------------------------
+
+require 'optparse'
+require 'lib/assert.rb'
+include TestUtil::Assertions
+
+OPTIONS = {
+  :dcps_debuglevel => 0,
+}
+
+ARGV.options do |opts|
+    script_name = File.basename($0)
+    opts.banner = "Usage: ruby #{script_name} [options]"
+
+    opts.separator ""
+
+    opts.on("--d LVL",
+            "Set DCPSDebugLevel value.",
+            "Default: 0") { |v| OPTIONS[:dcps_debuglevel]=v }
+
+    opts.separator ""
+
+    opts.on("-h", "--help",
+            "Show this help message.") { puts opts; exit }
+
+    opts.parse!
+end
+
+require 'dds'
+
+class ShapeListener < DDS::DataReaderListener
+  def initialize()
+  end
+
+  def on_data_available(reader)
+    puts "Ruby on_data_available!"
+    shape = ShapeType.new("ORANGE", 10, 10, 10)
+    reader.read (shape);
+    puts "Read sample #{shape.color()} #{shape.x()} #{shape.y()} #{shape.shapesize()}";
+  end
+end
+
+begin
+
+dfp = DDS.DomainParticipantFactory_init()
+dp = dfp.create_participant()
+topic = dp.create_topic()
+pub = dp.create_publisher()
+sub = dp.create_subscriber()
+dw = pub.create_datawriter(topic)
+
+listener = ShapeListener.new()
+
+dr = sub.create_datareader(topic, listener)
+
+$i = 0
+$num = 10
+shape = ShapeType.new("ORANGE", 10, 10, 10)
+
+while $i < $num  do
+  dw.write(shape)
+  shape.shapesize = $i * 10
+  shape.x = $i * 10 + 10
+  shape.y = $i * 10 + 10
+  shape.color = "RED"
+  $i=$i+1
+  sleep(1)
+end
+
+pub = dp.delete_contained_entities()
+
+ensure
+
+end