| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds licenses this file |
| * to you 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 org.jclouds.demo.tweetstore.controller; |
| |
| import static com.google.appengine.api.taskqueue.TaskOptions.Builder.withUrl; |
| import static com.google.appengine.repackaged.com.google.common.base.Strings.nullToEmpty; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.annotation.Resource; |
| import javax.inject.Inject; |
| import javax.inject.Singleton; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.ws.rs.core.MediaType; |
| |
| import org.jclouds.blobstore.BlobStoreContext; |
| import org.jclouds.logging.Logger; |
| |
| import com.google.appengine.api.taskqueue.Queue; |
| import com.google.appengine.api.taskqueue.TaskOptions.Method; |
| import com.google.common.annotations.VisibleForTesting; |
| |
| /** |
| * Adds tasks to retrieve and store tweets in all registered contexts to an async |
| * task queue. |
| * |
| * @author Andrew Phillips |
| * @see StoreTweetsController |
| */ |
| @Singleton |
| public class EnqueueStoresController extends HttpServlet { |
| /** The serialVersionUID */ |
| private static final long serialVersionUID = 7215420527854203714L; |
| |
| private final Set<String> contextNames; |
| private final Queue taskQueue; |
| |
| @Resource |
| protected Logger logger = Logger.NULL; |
| |
| @Inject |
| public EnqueueStoresController(Map<String, BlobStoreContext> contexts, |
| Queue taskQueue) { |
| contextNames = contexts.keySet(); |
| this.taskQueue = taskQueue; |
| } |
| |
| @VisibleForTesting |
| void enqueueStoreTweetTasks() { |
| for (String contextName : contextNames) { |
| logger.debug("enqueuing task to store tweets in blobstore '%s'", contextName); |
| taskQueue.add(withUrl("/store/do").header("context", contextName).method(Method.GET)); |
| } |
| } |
| |
| @Override |
| protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
| if (!nullToEmpty(request.getHeader("X-AppEngine-Cron")).equals("true")) { |
| response.sendError(401); |
| } |
| |
| try { |
| enqueueStoreTweetTasks(); |
| response.setContentType(MediaType.TEXT_PLAIN); |
| response.getWriter().println("Done!"); |
| } catch (Exception e) { |
| logger.error(e, "Error storing tweets"); |
| throw new ServletException(e); |
| } |
| } |
| } |