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  1. using System;
  2. using MySql.Data.MySqlClient;
  3. namespace DotNetCore.CAP.MySql.Test
  4. {
  5. public static class ConnectionUtil
  6. {
  7. private const string DatabaseVariable = "Cap_MySql_DatabaseName";
  8. private const string ConnectionStringTemplateVariable = "Cap_MySql_ConnectionStringTemplate";
  9. private const string MasterDatabaseName = "information_schema";
  10. private const string DefaultDatabaseName = @"DotNetCore.CAP.MySql.Test";
  11. private const string DefaultConnectionStringTemplate =
  12. @"Server=localhost;Database={0};Uid=root;Pwd=123123;Allow User Variables=True;";
  13. public static string GetDatabaseName()
  14. {
  15. return Environment.GetEnvironmentVariable(DatabaseVariable) ?? DefaultDatabaseName;
  16. }
  17. public static string GetMasterConnectionString()
  18. {
  19. return string.Format(GetConnectionStringTemplate(), MasterDatabaseName);
  20. }
  21. public static string GetConnectionString()
  22. {
  23. return string.Format(GetConnectionStringTemplate(), GetDatabaseName());
  24. }
  25. private static string GetConnectionStringTemplate()
  26. {
  27. return
  28. Environment.GetEnvironmentVariable(ConnectionStringTemplateVariable) ??
  29. DefaultConnectionStringTemplate;
  30. }
  31. public static MySqlConnection CreateConnection(string connectionString = null)
  32. {
  33. connectionString = connectionString ?? GetConnectionString();
  34. var connection = new MySqlConnection(connectionString);
  35. connection.Open();
  36. return connection;
  37. }
  38. }
  39. }