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1   /*
2    * Copyright 2007-2008 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.gwe.app.client.web.servlet;
18  
19  import java.util.List;
20  
21  import javax.servlet.http.HttpServletRequest;
22  
23  import org.gwe.api.ServerAPIConnectionException;
24  import org.gwe.api.Session4ClientAPIEnhancer;
25  import org.gwe.app.client.admin.InstallerException;
26  import org.gwe.app.client.web.request.PageModel;
27  import org.gwe.app.client.web.request.Param;
28  import org.gwe.drivers.bundleManagers.BundleType;
29  import org.gwe.persistence.model.HeadResourceInfo;
30  import org.gwe.persistence.model.OrderInfo;
31  
32  /**
33   * @author Marco Ruiz
34   * @since Dec 15, 2008
35   */
36  public abstract class GWEClusterSelectedServlet extends GWEServlet {
37  
38  	public GWEClusterSelectedServlet(String context) {
39  	    super(context);
40      }
41  	
42  	protected HeadResourceInfo getSelectedCluster(PageModel pageModel) {
43  	    return getConfig().getGrid().getHeadResource(pageModel.getParam(Param.CLUSTER_ID));
44      }
45  
46      protected PageModel createPageModel(HttpServletRequest request) {
47  		PageModel pageModel = new PageModel(request, getConfig());
48  		
49  		pageModel.addIdentifiedObject(Param.CLUSTER_ID, getSelectedCluster(pageModel));
50          try {
51  	        populatePageModel(pageModel);
52          } catch (InstallerException e) {
53  	        // TODO Auto-generated catch block
54  	        e.printStackTrace();
55          } catch (ServerAPIConnectionException e) {
56  	        // TODO Auto-generated catch block
57  	        e.printStackTrace();
58          }
59  	    return pageModel;
60      }
61  
62  	private void populatePageModel(PageModel pageModel) throws InstallerException, ServerAPIConnectionException {
63  	    Session4ClientAPIEnhancer session = getSelectedClusterSession(pageModel);
64  		pageModel.put("gweSession", session);
65  		specificPageModelPopulation(pageModel, session);
66  	    addOrderList(pageModel, session);
67      }
68  
69  	private void addOrderList(PageModel pageModel, Session4ClientAPIEnhancer session) {
70  	    HeadResourceInfo selectedCluster = getSelectedCluster(pageModel);
71  		if (selectedCluster != null) {
72  	        List<OrderInfo> ordersList = querySelectedClusterOrdersList(session);
73  	        selectedCluster.setOrdersList(ordersList);
74          }
75      }
76  
77  	private Session4ClientAPIEnhancer getSelectedClusterSession(PageModel pageModel) throws InstallerException, ServerAPIConnectionException {
78  		HeadResourceInfo selectedCluster = getSelectedCluster(pageModel);
79  		Boolean installDaemonIfNeeded = pageModel.getParam(Param.INSTALL);
80  		BundleType installDaemonIfNeededBundle = BundleType.get(pageModel.getParam(Param.BUNDLE));
81  		return getConfig().getSessionsRepository().getSession(selectedCluster, installDaemonIfNeeded, installDaemonIfNeededBundle);
82  	}
83  
84  	private List<OrderInfo> querySelectedClusterOrdersList(Session4ClientAPIEnhancer session) {
85  	    try {
86  	        return session.getOrdersList(false);
87  	    } catch (Exception e) {}
88  	    return null;
89      }
90  	
91  	/**
92  	 * Callback method to populate page model with more contextual object models. Default: does nothing!
93  	 * 
94  	 * @param pageModel
95  	 * @param session
96  	 */
97  	protected void specificPageModelPopulation(PageModel pageModel, Session4ClientAPIEnhancer session) {}
98  }