| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.shell.jetty; |
| |
| import java.sql.Driver; |
| import java.sql.DriverManager; |
| import java.sql.SQLException; |
| import java.util.Enumeration; |
| |
| /** |
| * Workaround hack for the unfortunate architecture of JDBC drivers. |
| * |
| * If code loaded by WebAppClassLoader loads a JDBC driver, then it will pin the |
| * class loader across server refresh because java.sql.DriverManager is a system |
| * class and it maintains a static reference to any loaded drivers. |
| */ |
| public class JDBCUnloader { |
| |
| public static void unload() { |
| Enumeration<Driver> drivers = DriverManager.getDrivers(); |
| |
| try { |
| while (drivers.hasMoreElements()) { |
| Driver driver = drivers.nextElement(); |
| DriverManager.deregisterDriver(driver); |
| } |
| } catch (SQLException e) { |
| throw new RuntimeException("Error unloading the JDBC Drivers", e); |
| } |
| } |
| |
| private JDBCUnloader() { |
| } |
| } |