refactor: 커넥션 바인딩 로직 위치 변경

Author: junhaa

app/src/main/java/com/techcourse/aop/TransactionHandler.java

@@ -51,6 +51,7 @@ private Object invokeWithTransaction(final Method method, final Object[] args) t
 
         try {
             conn = DataSourceUtils.getConnection(dataSource);
+            TransactionSynchronizationManager.bindResource(dataSource, conn);
             originalAutoCommit = conn.getAutoCommit();
             conn.setAutoCommit(false);
 

jdbc/src/main/java/com/interface21/jdbc/datasource/DataSourceUtils.java

@@ -18,9 +18,7 @@ public static Connection getConnection(DataSource dataSource) throws CannotGetJd
         }
 
         try {
-            connection = dataSource.getConnection();
-            TransactionSynchronizationManager.bindResource(dataSource, connection);
-            return connection;
+            return dataSource.getConnection();
         } catch (SQLException ex) {
             throw new CannotGetJdbcConnectionException("Failed to obtain JDBC Connection", ex);
         }