| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // 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.googlesource.gerrit.plugins.github.oauth; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpSession; |
| |
| public abstract class HttpSessionProvider<T> implements ScopedProvider<T> { |
| |
| @Inject |
| private Provider<T> provider; |
| |
| @Inject |
| private Provider<HttpServletRequest> httpRequestProvider; |
| |
| @Override |
| public T get() { |
| return get(httpRequestProvider.get()); |
| } |
| |
| @Override |
| public T get(final HttpServletRequest req) { |
| HttpSession session = req.getSession(); |
| String singletonKey = getClass().getName(); |
| |
| synchronized (this) { |
| @SuppressWarnings("unchecked") |
| T instance = (T) session.getAttribute(singletonKey); |
| if (instance == null) { |
| instance = provider.get(); |
| session.setAttribute(singletonKey, instance); |
| } |
| return instance; |
| } |
| } |
| |
| @Override |
| public HttpServletRequest getScopedRequest() { |
| return httpRequestProvider.get(); |
| } |
| } |