//---------------------------------------------------------------------
// Static members
/// <summary>
/// Loads message queue settings from the application configuration using
/// the specified key prefix.
/// </summary>
/// <param name="keyPrefix">The configuration key prefix.</param>
/// <returns>A <see cref="MsgQueueSettings" /> instance.</returns>
/// <remarks>
/// <para>
/// This method loads the settings described below from the application
/// configuration using the <paramref name="keyPrefix" />.
/// </para>
/// <div class="tablediv">
/// <table class="dtTABLE" cellspacing="0" ID="Table1">
/// <tr valign="top">
/// <th width="1">Setting</th>
/// <th width="1">Default</th>
/// <th width="90%">Description</th>
/// </tr>
/// <tr valign="top">
/// <td>BaseEP</td>
/// <td><see cref="MsgQueue.AbstractBaseEP" /></td>
/// <td>
/// The message queue service's base endpoint.
/// </td>
/// </tr>
/// <tr valign="top">
/// <td>Timeout</td>
/// <td>infinite</td>
/// <td>
/// The maximum time to wait for a response from a queue service before
/// terminating a transaction with a <see cref="TimeoutException" />.
/// Set <b>infinite</b> to wait indefinitely.
/// </td>
/// </tr>
/// <tr valign="top">
/// <td>MessageTTL</td>
/// <td><see cref="TimeSpan.Zero" /></td>
/// <td>
/// The default message expiration time. This value is used to caclulate
/// the expiration time for for messages whose <see cref="QueuedMsg.ExpireTime" />
/// property was not explicitly set by the application. Use <see cref="TimeSpan.Zero" />
/// to set the expiration date to the maximum in this case.
/// </td>
/// </tr>
/// <tr valign="top">
/// <td>Compress</td>
/// <td>BEST</td>
/// <td>
/// Specifes if serialized message bodies should be compressed before being
/// submitted to the queue service. The possible values are <B>NONE</B>,
/// <b>COMPRESS</b>, and <b>BEST</b>.
/// </td>
/// </tr>
/// </table>
/// </div>
/// </remarks>
public static MsgQueueSettings LoadConfig(string keyPrefix)
{
var settings = new MsgQueueSettings();
var config = new Config(keyPrefix);
settings.BaseEP = config.Get("BaseEP", settings.BaseEP);
settings.Timeout = config.Get("Timeout", settings.Timeout);
settings.MessageTTL = config.Get("MessageTTL", settings.MessageTTL);
settings.Compress = config.Get <Compress>("Compress", settings.Compress);
return(settings);
}
/// <summary>
/// Returns the message's headers as a string suitable for
/// transmitting in a <see cref="MsgQueueCmd" /> or
/// <see cref="MsgQueueAck" /> message.
/// </summary>
/// <param name="settings">The <see cref="MsgQueueSettings" /> settings.</param>
/// <returns>A <see cref="ArgCollection" /> formatted string.</returns>
internal string GetMessageHeader(MsgQueueSettings settings)
{
var args = new ArgCollection('=', '\t');
if (expireTime == DateTime.MinValue)
{
// If the expiration time was not explicitly set by the application
// then we're going to set it ourselves.
if (settings.MessageTTL <= TimeSpan.Zero)
{
expireTime = DateTime.MaxValue;
}
else
{
expireTime = DateTime.UtcNow + settings.MessageTTL;
}
}
args.Set("id", id);
if (sessionID != Guid.Empty)
{
args.Set("session-id", sessionID);
}
args.Set("target-ep", targetEP.ToString());
if (responseEP != null)
{
args.Set("response-ep", responseEP.ToString());
}
args.Set("send-time", sendTime);
args.Set("expire-time", expireTime);
args.Set("flags", (int)flags);
args.Set("priority", (int)priority);
return(args.ToString());
}
