| /** |
| * 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.config; |
| |
| import static com.google.appengine.api.taskqueue.TaskOptions.Builder.withUrl; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.base.Preconditions.checkState; |
| import static com.google.common.base.Predicates.in; |
| import static com.google.common.collect.ImmutableSet.copyOf; |
| import static com.google.common.collect.Sets.filter; |
| import static org.jclouds.demo.tweetstore.reference.TweetStoreConstants.PROPERTY_TWEETSTORE_BLOBSTORES; |
| import static org.jclouds.demo.tweetstore.reference.TweetStoreConstants.PROPERTY_TWEETSTORE_CONTAINER; |
| import static org.jclouds.demo.tweetstore.reference.TwitterConstants.PROPERTY_TWITTER_ACCESSTOKEN; |
| import static org.jclouds.demo.tweetstore.reference.TwitterConstants.PROPERTY_TWITTER_ACCESSTOKEN_SECRET; |
| import static org.jclouds.demo.tweetstore.reference.TwitterConstants.PROPERTY_TWITTER_CONSUMER_KEY; |
| import static org.jclouds.demo.tweetstore.reference.TwitterConstants.PROPERTY_TWITTER_CONSUMER_SECRET; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.Set; |
| |
| import javax.annotation.PostConstruct; |
| import javax.annotation.PreDestroy; |
| import javax.servlet.Servlet; |
| import javax.servlet.ServletConfig; |
| import javax.servlet.ServletException; |
| |
| import org.jclouds.blobstore.BlobStoreContext; |
| import org.jclouds.blobstore.BlobStoreContextFactory; |
| import org.jclouds.demo.tweetstore.config.util.CredentialsCollector; |
| import org.jclouds.demo.tweetstore.controller.AddTweetsController; |
| import org.jclouds.demo.tweetstore.controller.StoreTweetsController; |
| import org.jclouds.demo.tweetstore.functions.ServiceToStoredTweetStatuses; |
| import org.jclouds.gae.config.GoogleAppEngineConfigurationModule; |
| import org.springframework.beans.factory.BeanCreationException; |
| import org.springframework.context.annotation.Bean; |
| import org.springframework.context.annotation.Configuration; |
| import org.springframework.web.context.ServletConfigAware; |
| import org.springframework.web.servlet.HandlerAdapter; |
| import org.springframework.web.servlet.HandlerMapping; |
| import org.springframework.web.servlet.handler.SimpleServletHandlerAdapter; |
| import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping; |
| |
| import twitter4j.Twitter; |
| import twitter4j.TwitterFactory; |
| import twitter4j.conf.ConfigurationBuilder; |
| |
| import com.google.appengine.api.taskqueue.Queue; |
| import com.google.appengine.api.taskqueue.QueueFactory; |
| import com.google.appengine.api.taskqueue.TaskOptions.Method; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Maps; |
| import com.google.common.io.Closeables; |
| import com.google.inject.Module; |
| |
| /** |
| * Creates servlets (using resources from the {@link SpringAppConfig}) and mappings. |
| * |
| * @author Andrew Phillips |
| * @see SpringAppConfig |
| */ |
| @Configuration |
| public class SpringServletConfig extends LoggingConfig implements ServletConfigAware { |
| public static final String PROPERTY_BLOBSTORE_CONTEXTS = "blobstore.contexts"; |
| |
| private ServletConfig servletConfig; |
| |
| private Map<String, BlobStoreContext> providerTypeToBlobStoreMap; |
| private Twitter twitterClient; |
| private String container; |
| private Queue queue; |
| |
| @PostConstruct |
| public void initialize() throws IOException { |
| BlobStoreContextFactory blobStoreContextFactory = new BlobStoreContextFactory(); |
| |
| Properties props = loadJCloudsProperties(); |
| logger.trace("About to initialize members."); |
| |
| Module googleModule = new GoogleAppEngineConfigurationModule(); |
| Set<Module> modules = ImmutableSet.<Module> of(googleModule); |
| // shared across all blobstores and used to retrieve tweets |
| try { |
| twitter4j.conf.Configuration twitterConf = new ConfigurationBuilder() |
| .setOAuthConsumerKey(props.getProperty(PROPERTY_TWITTER_CONSUMER_KEY)) |
| .setOAuthConsumerSecret(props.getProperty(PROPERTY_TWITTER_CONSUMER_SECRET)) |
| .setOAuthAccessToken(props.getProperty(PROPERTY_TWITTER_ACCESSTOKEN)) |
| .setOAuthAccessTokenSecret(props.getProperty(PROPERTY_TWITTER_ACCESSTOKEN_SECRET)) |
| .build(); |
| twitterClient = new TwitterFactory(twitterConf).getInstance(); |
| } catch (IllegalArgumentException e) { |
| throw new IllegalArgumentException("properties for twitter not configured properly in " + props.toString(), e); |
| } |
| // common namespace for storing tweets |
| container = checkNotNull(props.getProperty(PROPERTY_TWEETSTORE_CONTAINER), PROPERTY_TWEETSTORE_CONTAINER); |
| |
| // instantiate and store references to all blobstores by provider name |
| providerTypeToBlobStoreMap = Maps.newHashMap(); |
| for (String hint : getBlobstoreContexts(props)) { |
| providerTypeToBlobStoreMap.put(hint, blobStoreContextFactory.createContext(hint, modules, props)); |
| } |
| |
| // get a queue for submitting store tweet requests |
| queue = QueueFactory.getQueue("twitter"); |
| // submit a job to store tweets for each configured blobstore |
| for (String name : providerTypeToBlobStoreMap.keySet()) { |
| queue.add(withUrl("/store/do").header("context", name).method(Method.GET)); |
| } |
| logger.trace("Members initialized. Twitter: '%s', container: '%s', provider types: '%s'", twitterClient, |
| container, providerTypeToBlobStoreMap.keySet()); |
| } |
| |
| private static Iterable<String> getBlobstoreContexts(Properties props) { |
| Set<String> contexts = new CredentialsCollector().apply(props).keySet(); |
| String explicitContexts = props.getProperty(PROPERTY_TWEETSTORE_BLOBSTORES); |
| if (explicitContexts != null) { |
| contexts = filter(contexts, in(copyOf(Splitter.on(',').split(explicitContexts)))); |
| } |
| checkState(!contexts.isEmpty(), "no credentials available for any requested context"); |
| return contexts; |
| } |
| |
| private Properties loadJCloudsProperties() { |
| logger.trace("About to read properties from '%s'", "/WEB-INF/jclouds.properties"); |
| Properties props = new Properties(); |
| InputStream input = servletConfig.getServletContext().getResourceAsStream("/WEB-INF/jclouds.properties"); |
| try { |
| props.load(input); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } finally { |
| Closeables.closeQuietly(input); |
| } |
| logger.trace("Properties successfully read."); |
| return props; |
| } |
| |
| @Bean |
| public StoreTweetsController storeTweetsController() { |
| StoreTweetsController controller = new StoreTweetsController(providerTypeToBlobStoreMap, container, twitterClient); |
| injectServletConfig(controller); |
| return controller; |
| } |
| |
| @Bean |
| public AddTweetsController addTweetsController() { |
| AddTweetsController controller = new AddTweetsController(providerTypeToBlobStoreMap, |
| serviceToStoredTweetStatuses()); |
| injectServletConfig(controller); |
| return controller; |
| } |
| |
| private void injectServletConfig(Servlet servlet) { |
| logger.trace("About to inject servlet config '%s'", servletConfig); |
| try { |
| servlet.init(checkNotNull(servletConfig)); |
| } catch (ServletException exception) { |
| throw new BeanCreationException("Unable to instantiate " + servlet, exception); |
| } |
| logger.trace("Successfully injected servlet config."); |
| } |
| |
| @Bean |
| ServiceToStoredTweetStatuses serviceToStoredTweetStatuses() { |
| return new ServiceToStoredTweetStatuses(providerTypeToBlobStoreMap, container); |
| } |
| |
| @Bean |
| public HandlerMapping handlerMapping() { |
| SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping(); |
| Map<String, Object> urlMap = Maps.newHashMapWithExpectedSize(2); |
| urlMap.put("/store/*", storeTweetsController()); |
| urlMap.put("/tweets/*", addTweetsController()); |
| mapping.setUrlMap(urlMap); |
| /* |
| * "/store" and "/tweets" are part of the servlet mapping and thus stripped by the mapping if |
| * using default settings. |
| */ |
| mapping.setAlwaysUseFullPath(true); |
| return mapping; |
| } |
| |
| @Bean |
| public HandlerAdapter servletHandlerAdapter() { |
| return new SimpleServletHandlerAdapter(); |
| } |
| |
| @PreDestroy |
| public void destroy() throws Exception { |
| logger.trace("About to close contexts."); |
| for (BlobStoreContext context : providerTypeToBlobStoreMap.values()) { |
| context.close(); |
| } |
| logger.trace("Contexts closed."); |
| logger.trace("About to purge request queue."); |
| queue.purge(); |
| logger.trace("Request queue purged."); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see |
| * org.springframework.web.context.ServletConfigAware#setServletConfig(javax.servlet.ServletConfig |
| * ) |
| */ |
| @Override |
| public void setServletConfig(ServletConfig servletConfig) { |
| this.servletConfig = servletConfig; |
| } |
| } |