/// <summary>
/// Get a prebuilt engine catalog
/// </summary>
/// <param name="knowledgebase">cache key</param>
/// <param name="getDirectory">directory with prebuilt catalog.</param>
/// <returns></returns>
public static QLuceneEngine GetEngine(string knowledgebase, Func <Directory> getDirectory)
{
if (engines.TryGetValue(knowledgebase, out var engine))
{
return(engine);
}
lock (engines)
{
if (engines.TryGetValue(knowledgebase, out engine))
{
return(engine);
}
engines[knowledgebase] = new QLuceneEngine(getDirectory());
return(engines[knowledgebase]);
}
}
/// <summary>
/// Get or create the catalog for qnajson
/// </summary>
/// <param name="knowledgebase">key to cache</param>
/// <param name="qnaJson">qnaJson to use</param>
/// <param name="getDirectory">directory to use if index needs to be created. (Default is RAMDirectory)</param>
/// <returns></returns>
public static QLuceneEngine GetEngine(string knowledgebase, string qnaJson)
{
if (engines.TryGetValue(knowledgebase, out var engine))
{
return(engine);
}
lock (engines)
{
if (engines.TryGetValue(knowledgebase, out engine))
{
return(engine);
}
Directory directory = new RAMDirectory();
QLuceneEngine.CreateCatalog(qnaJson, directory);
engines[knowledgebase] = new QLuceneEngine(directory);
return(engines[knowledgebase]);
}
}
/// <summary>
/// Get engine from resource.Id
/// </summary>
/// <param name="dialogContext"></param>
/// <param name="kbResourceId">resource.qna</param>
/// <returns></returns>
public static async Task <QLuceneEngine> GetEngine(DialogContext dialogContext, string kbResourceId)
{
if (!engines.TryGetValue(kbResourceId, out var engine))
{
var resourceExplorer = dialogContext.Context.TurnState.Get <ResourceExplorer>();
var resource = resourceExplorer.GetResource(kbResourceId);
// resource.catalog
var dirInfo = new System.IO.DirectoryInfo(System.IO.Path.Combine(resource.FullName) + ".catalog");
if (dirInfo.Exists)
{
// open existing catalog
engines[kbResourceId] = new QLuceneEngine(FSDirectory.Open(dirInfo));
return(engines[kbResourceId]);
}
else
{
// create ram catalog on the fly
string json;
Resource resourceJson;
resourceExplorer.TryGetResource(kbResourceId + ".json", out resourceJson);
if (resourceJson != null)
{
json = await resourceJson.ReadTextAsync().ConfigureAwait(false);
}
else
{
json = await resource.ReadTextAsync().ConfigureAwait(false);
}
var directory = new RAMDirectory();
QLuceneEngine.CreateCatalog(json, directory);
engines[kbResourceId] = new QLuceneEngine(directory);
return(engines[kbResourceId]);
}
}
return(engine);
}
