private static bool LookupConnectionFactoryInfo(string[] paths, string scheme, out string assemblyFileName, out string factoryClassName)
{
bool foundFactory = false;
string schemeLower = scheme.ToLower();
ProviderFactoryInfo pfi;
// Look for a custom configuration to handle this scheme.
string configFileName = String.Format("nmsprovider-{0}.config", schemeLower);
assemblyFileName = String.Empty;
factoryClassName = String.Empty;
Tracer.DebugFormat("Attempting to locate provider configuration: {0}", configFileName);
foreach(string path in paths)
{
string fullpath = Path.Combine(path, configFileName);
Tracer.DebugFormat("Looking for: {0}", fullpath);
try
{
if(File.Exists(fullpath))
{
Tracer.DebugFormat("\tConfiguration file found in {0}", fullpath);
XmlDocument configDoc = new XmlDocument();
configDoc.Load(fullpath);
XmlElement providerNode = (XmlElement) configDoc.SelectSingleNode("/configuration/provider");
if(null != providerNode)
{
assemblyFileName = providerNode.GetAttribute("assembly");
factoryClassName = providerNode.GetAttribute("classFactory");
if(!String.IsNullOrEmpty(assemblyFileName) && !String.IsNullOrEmpty(factoryClassName))
{
foundFactory = true;
Tracer.DebugFormat("Selected custom provider for {0}: {1}, {2}", schemeLower, assemblyFileName, factoryClassName);
break;
}
}
}
}
catch(Exception ex)
{
Tracer.DebugFormat("Exception while scanning {0}: {1}", fullpath, ex.Message);
}
}
if(!foundFactory)
{
// Check for standard provider implementations.
if(schemaProviderFactoryMap.TryGetValue(schemeLower, out pfi))
{
assemblyFileName = pfi.assemblyFileName;
factoryClassName = pfi.factoryClassName;
foundFactory = true;
Tracer.DebugFormat("Selected standard provider for {0}: {1}, {2}", schemeLower, assemblyFileName, factoryClassName);
}
}
return foundFactory;
}
