This text file contains example code from:
Chapter 19 - Service Performance Optimization 
Book - SOA with .NET & Windows Azure: Realizing Service-Orientation with the Microsoft Platform
Series - Prentice Hall Service-Oriented Computing Series from Thomas Erl (www.soabooks.com/community)
Certification - These examples are used as part of the Certified SOA .NET Developer curriculum (www.soaschool.com)



<example id="ch19ex02" label="19.2" xreflabel="19.2" float="1">
<?docpage num="596"?>
<title id="ch19ex02.title"/>
<programlisting linenumbering="unnumbered">public Message <emphasis role="pd_red">Request</emphasis>(Message message, TimeSpan timeout)
{
  Message msg = null;
  if (message.Headers.Action == "http://example.org/
    IProductService/GetProductInformation")
  {
    MessageBuffer buffer = message.CreateBufferedCopy(2000);
    Message tempMsg = buffer.CreateMessage();
    XmlDictionaryReader dictread =
      tempMsg.GetReaderAtBodyContents();
    dictread.ReadToFollowing("productId",
      "http://example.org/");
    string productId = dictread.ReadString();
    if (cache.TryGetValue(productId, out msg))
    {
      msg.Headers.RelatesTo = message.Headers.MessageId;
    }
    else
    {
      message = buffer.CreateMessage();
      msg = innerChannel.Request(message, timeout);
      buffer = msg.CreateBufferedCopy(int.MaxValue);
      cache.Add(productId, buffer.CreateMessage());
      msg = buffer.CreateMessage();
    }
  }
  else
  {
    msg = innerChannel.Request(message, timeout);
  }
  return msg;
}</programlisting>
</example>