| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.apache.cocoon.ajax; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| import org.apache.cocoon.acting.ServiceableAction; |
| import org.apache.cocoon.components.flow.ContinuationsManager; |
| import org.apache.cocoon.components.flow.FlowHelper; |
| import org.apache.cocoon.components.flow.WebContinuation; |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| import org.apache.cocoon.environment.Redirector; |
| import org.apache.cocoon.environment.SourceResolver; |
| import org.apache.cocoon.sitemap.SitemapParameters; |
| |
| /** |
| * Get a continuation knowing its identifier, and set it as the current continuation |
| * in the object model, in the same manner as <code>cocoon.sendPageAndWait()</code> does. |
| * This action is useful when an Ajax request is made that needs to access data related |
| * to the continuation that originally displayed the current page. |
| * <p> |
| * The continuation id is either the <code>src</code> attribute in <code><map:act></code> |
| * or, if not specified, the <code>continuation-id</code> request parameter. |
| * <p> |
| * This action is successful if the continuation exists and is still valid. |
| * |
| * @since 2.1.8 |
| * @version $Id$ |
| */ |
| public class GetContinuationAction extends ServiceableAction implements ThreadSafe, Disposable { |
| ContinuationsManager contManager; |
| |
| public void service(ServiceManager manager) throws ServiceException { |
| super.service(manager); |
| this.contManager = (ContinuationsManager)manager.lookup(ContinuationsManager.ROLE); |
| } |
| |
| public Map act(Redirector redirector, SourceResolver resolver, Map objectModel, String source, Parameters parameters) throws Exception { |
| String continuationId; |
| if (source == null) { |
| continuationId = ObjectModelHelper.getRequest(objectModel).getParameter("continuation-id"); |
| } else { |
| continuationId = source; |
| } |
| |
| // The interpreter id is the sitemap's URI |
| String interpreterId = SitemapParameters.getLocation(parameters).getURI(); |
| WebContinuation wk = this.contManager.lookupWebContinuation(continuationId, interpreterId); |
| if (wk == null || wk.disposed()) { |
| return null; |
| } else { |
| // Getting the continuation updates the last access time |
| wk.getContinuation(); |
| FlowHelper.setWebContinuation(objectModel, wk); |
| return Collections.EMPTY_MAP; |
| } |
| } |
| |
| public void dispose() { |
| this.manager.release(this.contManager); |
| } |
| } |