삽질하다 도저히 문제 파악이 안돼서 opcUaManager로 분리 테스트 중

opcUaManager/Controllers/DatabaseController.cs

@@ -0,0 +1,98 @@
+using Microsoft.AspNetCore.Mvc;
+using OpcUaManager.Models;
+using OpcUaManager.Services;
+
+namespace OpcUaManager.Controllers;
+
+[ApiController]
+[Route("api/database")]
+[Produces("application/json")]
+public class DatabaseController : ControllerBase
+{
+    private readonly DatabaseService _dbSvc;
+    private readonly ILogger<DatabaseController> _logger;
+
+    public DatabaseController(DatabaseService dbSvc, ILogger<DatabaseController> logger)
+    {
+        _dbSvc  = dbSvc;
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// DB 연결을 테스트합니다.
+    /// </summary>
+    [HttpPost("test")]
+    [ProducesResponseType(200)]
+    [ProducesResponseType(typeof(ApiError), 400)]
+    public async Task<IActionResult> Test([FromBody] DbWriteRequest req)
+    {
+        var (ok, msg) = await _dbSvc.TestConnectionAsync(req);
+        return ok ? Ok(new { Message = msg })
+                  : BadRequest(new ApiError { Error = "연결 실패", Detail = msg });
+    }
+
+    /// <summary>
+    /// opc_history 테이블을 없으면 생성합니다.
+    /// </summary>
+    [HttpPost("init")]
+    [ProducesResponseType(200)]
+    [ProducesResponseType(typeof(ApiError), 400)]
+    public async Task<IActionResult> Init([FromBody] DbWriteRequest req)
+    {
+        var (ok, msg) = await _dbSvc.EnsureTableAsync(req);
+        return ok ? Ok(new { Message = msg })
+                  : BadRequest(new ApiError { Error = "테이블 초기화 실패", Detail = msg });
+    }
+
+    /// <summary>
+    /// OPC 태그를 지정 횟수만큼 읽어 DB에 저장합니다 (원본 5회 루프).
+    /// </summary>
+    /// <remarks>
+    /// Sample request:
+    ///
+    ///     POST /api/database/write
+    ///     {
+    ///         "tagNodeId":  "ns=1;s=shinam:p-6102.hzset.fieldvalue",
+    ///         "tagName":    "p-6102",
+    ///         "count":      5,
+    ///         "intervalMs": 2000,
+    ///         "dbHost":     "localhost",
+    ///         "dbName":     "opcdb",
+    ///         "dbUser":     "postgres",
+    ///         "dbPassword": "postgres"
+    ///     }
+    /// </remarks>
+    [HttpPost("write")]
+    [ProducesResponseType(typeof(DbWriteResult), 200)]
+    [ProducesResponseType(typeof(ApiError), 400)]
+    public async Task<IActionResult> Write([FromBody] DbWriteRequest req)
+    {
+        if (string.IsNullOrWhiteSpace(req.TagNodeId) || string.IsNullOrWhiteSpace(req.TagName))
+            return BadRequest(new ApiError
+            {
+                Error  = "필수값 누락",
+                Detail = "TagNodeId, TagName 은 필수입니다."
+            });
+
+        req.Count = Math.Clamp(req.Count, 1, 100);
+
+        _logger.LogInformation("DB 저장 시작: {Tag} × {Count}회", req.TagName, req.Count);
+        var result = await _dbSvc.WriteLoopAsync(req);
+
+        return result.Success ? Ok(result)
+            : BadRequest(new ApiError { Error = "저장 실패", Detail = result.Message });
+    }
+
+    /// <summary>
+    /// opc_history 테이블의 최근 레코드를 조회합니다.
+    /// </summary>
+    [HttpPost("query")]
+    [ProducesResponseType(typeof(DbQueryResult), 200)]
+    [ProducesResponseType(typeof(ApiError), 400)]
+    public async Task<IActionResult> Query([FromBody] DbWriteRequest req, [FromQuery] int limit = 100)
+    {
+        var result = await _dbSvc.QueryRecentAsync(req, limit);
+        return result.Success ? Ok(result)
+            : BadRequest(new ApiError { Error = "조회 실패", Detail = result.Message });
+    }
+}