Переименование базы данных

DD.Persistence.API/DependencyInjection.cs

@@ -1,16 +1,14 @@
-using Mapster;
+using DD.Persistence.Database.Postgres.Services;
+using DD.Persistence.Models.Configurations;
+using DD.Persistence.Services;
+using DD.Persistence.Services.Interfaces;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Models;
-using DD.Persistence.Models;
-using DD.Persistence.Models.Configurations;
-using DD.Persistence.Services;
-using DD.Persistence.Services.Interfaces;
 using Swashbuckle.AspNetCore.SwaggerGen;
 using System.Reflection;
 using System.Text.Json.Nodes;
-using DD.Persistence.Database.Entity;
 
 namespace DD.Persistence.API;
 
@@ -54,6 +52,7 @@ public static class DependencyInjection
     {
         services.AddTransient<IWitsDataService, WitsDataService>();
         services.AddTransient<ITimestampedValuesService, TimestampedValuesService>();
+        services.AddTransient<IArchiveService, PostgresArchiveService>();
     }
 
     #region Authentication

DD.Persistence.App/appsettings.json

@@ -6,7 +6,8 @@
     }
   },
   "ConnectionStrings": {
-    "DefaultConnection": "Host=localhost;Database=persistence;Username=postgres;Password=postgres;Persist Security Info=True"
+    "DefaultConnection": "Host=localhost;Database=persistence;Username=postgres;Password=q;Persist Security Info=True",
+    "SystemBaseConnection": "Host=localhost;Database=postgres;Username=postgres;Password=q;Persist Security Info=True"
   },
   "AllowedHosts": "*",
   "NeedUseKeyCloak": false,

DD.Persistence.Database.Postgres/Services/ArchiveService.cs

@@ -0,0 +1,56 @@
+using DD.Persistence.Services.Interfaces;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Npgsql;
+
+namespace DD.Persistence.Database.Postgres.Services;
+
+/// <summary>
+/// Сервис по работе с источником данных - базой postgres
+/// </summary>
+public class PostgresArchiveService : IArchiveService
+{
+    private string connectionString;
+    private ILogger<PostgresArchiveService> logger;
+
+    /// <summary>
+    /// Сервис по работе с источником данных - базой postgres
+    /// </summary>
+    /// <param name="configuration"></param>
+    public PostgresArchiveService(IConfiguration configuration, ILogger<PostgresArchiveService> logger)
+    {
+        this.connectionString = configuration.GetConnectionString("SystemBaseConnection")!;
+        this.logger = logger;
+    }
+    public Task Create(string newName, CancellationToken token)
+    {
+        throw new NotImplementedException();
+    }
+
+    public async Task Rename(string newName, CancellationToken token)
+    {
+        await using var connection = new NpgsqlConnection(connectionString);
+        try
+        {
+            await connection.OpenAsync();
+
+            var sqlCloseConnect =
+                $"SELECT pg_terminate_backend(pg_stat_activity.pid) " +
+                $"FROM pg_stat_activity " +
+                $"WHERE pg_stat_activity.datname = 'persistence' AND pid <> pg_backend_pid();";
+            await using var command = new NpgsqlCommand(sqlCloseConnect, connection);
+            await command.ExecuteNonQueryAsync();
+
+            var rename = $"ALTER DATABASE persistence RENAME TO {newName};";
+            await using var sqlRenameDatabase = new NpgsqlCommand(rename, connection);
+            await sqlRenameDatabase.ExecuteNonQueryAsync();
+        }
+        catch (NpgsqlException exception)
+        {
+            this.logger.LogError(exception.Message);
+            throw;
+        }
+
+    }
+}

DD.Persistence/Services/Interfaces/IArchiveService.cs

@@ -1,25 +1,23 @@
 namespace DD.Persistence.Services.Interfaces;
 
 /// <summary>
-/// Сервис по работе с БД
+/// Сервис по работе источниками данных
 /// </summary>
-internal interface IArchiveService
+public interface IArchiveService
 {
     /// <summary>
-    /// Переименование БД
+    /// Переименование источника данных
     /// </summary>
-    /// <param name="connectionString"></param>
-    /// <param name="databaseName"></param>
+    /// <param name="newName">наименование источника данных</param>
     /// <param name="token"></param>
     /// <returns></returns>
-    Task RenameDatabase(string connectionString, string databaseName, CancellationToken token);
+    Task Rename(string newName, CancellationToken token);
 
     /// <summary>
-    /// Создание БД
+    /// Создание источника данных
     /// </summary>
-    /// <param name="connectionString"></param>
-    /// <param name="databaseName"></param>
+    /// <param name="newName"></param>
     /// <param name="token"></param>
     /// <returns></returns>
-    Task CreateDatabase(string connectionString, string databaseName, CancellationToken token);
+    Task Create(string newName, CancellationToken token);
 }