892057: Updated sample link

README.md

@@ -8,12 +8,15 @@ Collaborative editing Web API actions are supported in below platforms
 1. ASP.NET Core
 2. Java
 
-Please find the UG and documentation links below.
+Please find the sample and documentation links below.
+
+
+|Platf||||
 
  |Platform| UG links| Sample link |
  |----|----|----|
- |ASP.NET Core| <ul><li>[TypeScript](https://ej2.syncfusion.com/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[JavaScript](https://ej2.syncfusion.com/javascript/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[Vue](https://ej2.syncfusion.com/vue/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[Angular](https://ej2.syncfusion.com/angular/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[React](https://ej2.syncfusion.com/react/documentation/document-editor/collaborative-editing/using-dot-net)</li></ul> | <ul><li>[ASP.NET Core Web API](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET)</li><li>[TypeScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET/TypeScript)</li><li>[JavaScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET/Javascript)</li><li>[Vue](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET/Vue)</li><li>[Angular](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET/Angular)</li><li>[React](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/ASP.NET/React)</li></ul> | 
- |Java| <ul><li>[TypeScript](https://ej2.syncfusion.com/documentation/document-editor/collaborative-editing/using-java)</li><li>[JavaScript](https://ej2.syncfusion.com/javascript/documentation/document-editor/collaborative-editing/using-java)</li><li>[Vue](https://ej2.syncfusion.com/vue/documentation/document-editor/collaborative-editing/using-java)</li><li>[Angular](https://ej2.syncfusion.com/angular/documentation/document-editor/collaborative-editing/using-java)</li><li>[React](https://ej2.syncfusion.com/react/documentation/document-editor/collaborative-editing/using-java)</li></ul> | <ul><li>[Java Sprint boot](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/Java%20web%20service%20using%20PostgreSQL)</li><li>[TypeScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/TypeScript)</li><li>[JavaScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/JavaScript)</li><li>[Vue](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/Vue)</li><li>[Angular](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/Angular)</li><li>[React](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Java/React)</li></ul>| 
+ |ASP.NET Core| <ul><li>[TypeScript](https://ej2.syncfusion.com/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[JavaScript](https://ej2.syncfusion.com/javascript/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[Vue](https://ej2.syncfusion.com/vue/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[Angular](https://ej2.syncfusion.com/angular/documentation/document-editor/collaborative-editing/using-dot-net)</li><li>[React](https://ej2.syncfusion.com/react/documentation/document-editor/collaborative-editing/using-dot-net)</li></ul> | <ul><li>[ASP.NET Core Web API](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Server%20side%20with%20database/ASP.NET%20Core)</li><li>[TypeScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20dotnet/TypeScript)</li><li>[JavaScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20dotnet/JavaScript)</li><li>[Vue](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20dotnet/Vue)</li><li>[Angular](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20dotnet/Angular)</li><li>[React](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20dotnet/React)</li></ul> | 
+ |Java| <ul><li>[TypeScript](https://ej2.syncfusion.com/documentation/document-editor/collaborative-editing/using-java)</li><li>[JavaScript](https://ej2.syncfusion.com/javascript/documentation/document-editor/collaborative-editing/using-java)</li><li>[Vue](https://ej2.syncfusion.com/vue/documentation/document-editor/collaborative-editing/using-java)</li><li>[Angular](https://ej2.syncfusion.com/angular/documentation/document-editor/collaborative-editing/using-java)</li><li>[React](https://ej2.syncfusion.com/react/documentation/document-editor/collaborative-editing/using-java)</li></ul> | <ul><li>[Java Sprint boot](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Server%20side%20with%20database/Java/Java%20web%20service%20using%20PostgreSQL)</li><li>[TypeScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20Java/TypeScript)</li><li>[JavaScript](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20Java/JavaScript)</li><li>[Vue](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20Java/Vue)</li><li>[Angular](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20Java/Angular)</li><li>[React](https://github.com/SyncfusionExamples/EJ2-Document-Editor-Collaborative-Editing/tree/master/Client%20side%20with%20Java/React)</li></ul>| 
 
 
 

Server side with distributed cache/ASP.NET Core/Using Redis/Model/CollaborativeEditingHelper.cs

@@ -117,18 +117,27 @@ public class CollaborativeEditingHelper
 
              -- Retrieve the current revision number from Redis
              local revision = redis.call('GET', revisionKey)
-
+             if not revision then
+                revision = 0
+             else
+                revision = tonumber(revision)
+             end
              -- Calculate the effective version by multiplying the revision number by the threshold
              -- This helps in determining the actual version of the document considering the revisions
-             local effectiveVersion = tonumber(revision) * threshold
+             local effectiveVersion = revision * threshold
+
 
              -- Adjust the client's version by subtracting the effective version
              -- This calculation aligns the client's version with the server's version, accounting for any revisions
              clientVersion = clientVersion - effectiveVersion
 
              -- Return a range of list elements starting from the adjusted client version to the end of the list
              -- This command retrieves all operations that have occurred since the client's last known state
-             return redis.call('LRANGE', listKey, clientVersion, -1)";
+             if clientVersion >= 0 then
+                return redis.call('LRANGE', listKey, clientVersion, -1)
+            else
+                return {}
+            end";
 
         internal static string PendingOperations = @"
             local listKey = KEYS[1]