/// <summary>Extracts some parameters from the specified <c>ApplicationInstanceAwareness</c> value.</summary>
/// <param name="awareness">The <c>ApplicationInstanceAwareness</c> value to extract parameters from.</param>
/// <param name="prefix">The synchronization object prefix.</param>
/// <param name="identity">The identity used to handle the synchronization object.</param>
static void ExtractParameters(
ApplicationInstanceAwareness awareness, out string prefix, out IdentityReference identity)
{
new SecurityPermission(SecurityPermissionFlag.ControlPrincipal).Assert();
WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent();
if (currentIdentity == null)
{
throw new Exception("Unable to retrieve current identity");
}
if (awareness == ApplicationInstanceAwareness.Host && currentIdentity.Groups != null)
{
prefix = GlobalPrefix;
identity =
currentIdentity.Groups.FirstOrDefault(
reference => reference.Translate(typeof(SecurityIdentifier)).Value.Equals(UsersSidValue));
}
else
{
prefix = LocalPrefix;
identity = currentIdentity.User;
}
CodeAccessPermission.RevertAssert();
if (identity == null)
{
throw new Exception(
"Could not determine a proper identity to create synchronization objects access rules");
}
}
/// <summary>
/// Extracts some parameters from the specified <see cref = "ApplicationInstanceAwareness" /> value.
/// </summary>
/// <param name = "awareness">The <see cref = "ApplicationInstanceAwareness" /> value to extract parameters from.</param>
/// <param name = "prefix">The synchronization object prefix.</param>
/// <param name = "identity">The identity used to handle the synchronization object.</param>
/// <exception cref = "UnexpectedInstanceAwareApplicationException">A proper identity could not be determined.</exception>
private static void ExtractParameters(ApplicationInstanceAwareness awareness, out string prefix, out IdentityReference identity)
{
new SecurityPermission(SecurityPermissionFlag.ControlPrincipal).Assert();
WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent();
if (currentIdentity != null)
{
if (awareness == ApplicationInstanceAwareness.Host && currentIdentity.Groups != null)
{
prefix = GLOBAL_PREFIX;
identity = currentIdentity.Groups.FirstOrDefault(reference => reference.Translate(typeof(SecurityIdentifier)).Value.Equals(USERS_SID_VALUE));
}
else
{
prefix = LOCAL_PREFIX;
identity = currentIdentity.User;
}
CodeAccessPermission.RevertAssert();
if (identity == null)
throw new UnexpectedInstanceAwareApplicationException("Could not determine a proper identity to create synchronization objects access rules");
}
else
throw new UnexpectedInstanceAwareApplicationException("Unable to retrieve current identity");
}
/// <summary>
/// Initializes a new instance of the <see cref = "InstanceAwareApplication" /> class.
/// </summary>
/// <param name = "awareness">The instance awareness of the application.</param>
/// <exception cref = "System.InvalidOperationException">More than one instance of the <see cref = "System.Windows.Application" /> class is created per <see cref = "System.AppDomain" />.</exception>
public InstanceAwareApplication(ApplicationInstanceAwareness awareness)
{
m_Awareness = awareness;
}
/// <summary>Initializes a new instance of the <see cref="InstanceAwareApplication" /> class.</summary>
/// <param name="awareness">The instance awareness of the application.</param>
/// <exception cref="InvalidOperationException">More than one instance of the <c>System.Windows.Application</c> class is created per <c>System.AppDomain</c>.</exception>
public InstanceAwareApplication(ApplicationInstanceAwareness awareness)
{
this.awareness = awareness;
}
