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ServerBase/DB/DynamoDb/DynamoDbQueryExceptionNotifier.cs

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+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+using ServerCore; using ServerBase;
+
+
+namespace ServerBase;
+
+public class DynamoDbQueryExceptionNotifier
+{
+    public const string Success                             = "None";                               // 쿼리 성공
+    public const string ConditionalCheckFailed              = "ConditionalCheckFailed";             // 쿼리 실패 : 조건들이 충족하지 못해 실패 했다.
+    public const string ItemCollectionSizeLimitExceeded     = "ItemCollectionSizeLimitExceeded";    // 쿼리 실패 : 아이템 제한 개수 초과로 실패 했다.
+
+    public class ExceptionHandler
+    {
+        public ExceptionHandler(string reasonCode, ServerErrorCode returnToErrorCode) 
+        {
+            ReasonCode = reasonCode;
+            ReturnToErrorCode = returnToErrorCode;
+        }
+
+        public bool hasReasonCode(string reasonCode)
+        {
+            return ReasonCode.Equals(reasonCode, StringComparison.OrdinalIgnoreCase);
+        }
+
+        public string ReasonCode { get; set; }
+
+        public ServerErrorCode ReturnToErrorCode { get; set; }
+    }
+
+    private Int32 m_query_seq_no = 0;
+    private readonly Dictionary<Int32, ExceptionHandler> m_exception_handlers = new();
+
+    public DynamoDbQueryExceptionNotifier() 
+    { 
+    }
+
+    public bool registerExceptionHandler(ExceptionHandler? exceptionHandler)
+    {
+        m_query_seq_no++;
+
+        if(null == exceptionHandler)
+        {
+            return false;
+        }
+
+        if(true == m_exception_handlers.ContainsKey(m_query_seq_no))
+        {
+            return false;
+        }
+
+        m_exception_handlers[m_query_seq_no] = exceptionHandler;
+        return true;
+    }
+
+    public ExceptionHandler? findExceptionHandler(Int32 querySeqNo, string reasonCode)
+    {
+        if(false == m_exception_handlers.TryGetValue(querySeqNo, out var exception_handler))
+        {
+            return null;
+        }
+
+        if(false == exception_handler.hasReasonCode(reasonCode))
+        {
+            return null;
+        }
+
+        return exception_handler;
+    }
+}