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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.io.PrintWriter;
20  import java.io.Serializable;
21  import java.io.StringWriter;
22  import java.io.Writer;
23  import java.rmi.RemoteException;
24  import java.util.List;
25  
26  import org.gwe.api.ServerAPIConnectionException;
27  import org.gwe.api.Session4ClientAPIEnhancer;
28  import org.gwe.api.exceptions.PasswordMismatchException;
29  import org.gwe.app.client.web.request.Operation;
30  import org.gwe.app.client.web.request.PageModel;
31  import org.gwe.app.client.web.request.Param;
32  import org.gwe.persistence.model.OrderInfo;
33  import org.gwe.persistence.model.order.p2el.POrderDescriptor;
34  import org.gwe.utils.rex.REXException;
35  
36  /**
37   * @author Marco Ruiz
38   * @since Dec 13, 2008
39   */
40  public class QueueOrderServlet extends GWEClusterSelectedServlet {
41  
42  	public QueueOrderServlet() { super("queue"); }
43  
44      protected void specificPageModelPopulation(PageModel pageModel, Session4ClientAPIEnhancer session) {
45      	String p2el = pageModel.getParam(Param.P2EL);
46      	if (p2el == null || "".equals(p2el)) return;
47      	Operation mode = pageModel.getOperation();
48  		try {
49  	        POrderDescriptor<Serializable> descriptor = (POrderDescriptor) getConfig().createOrderDescriptor(p2el);
50  	        switch (mode) {
51  	        	case PREVIEW:
52  		        	pageModel.addIdentifiedObject(Param.OPER, getParsedP2EL(descriptor));
53  		    		preview(pageModel, session, descriptor);
54  	        		break;
55  	        	case QUEUE:
56  		    		queue(pageModel, session, descriptor);
57  	        		break;
58  	        }
59          } catch (REXException e) {
60          	// TODO: handle
61          }
62      }
63  
64  	private String getParsedP2EL(POrderDescriptor<Serializable> descriptor) {
65  		try {
66  			return descriptor.getP2ELStatementObj().toStringFormatted("", "\n");
67  		} catch (Exception e) {
68  			Writer result = new StringWriter();
69  			e.printStackTrace(new PrintWriter(result));
70  			return "Invalid P2EL statement: " + result.toString();
71  		}
72      }
73      
74  	private void queue(PageModel pageModel, Session4ClientAPIEnhancer session, POrderDescriptor<Serializable> descriptor) {
75  	    try {
76  			OrderInfo order = new OrderInfo(descriptor);
77  	        order = session.queueOrder(order);
78  			pageModel.addIdentifiedObject(Param.P2EL, order);
79  			pageModel.setParam(Param.P2EL, null);
80          } catch (PasswordMismatchException e) {
81          	// TODO: handle
82          } catch (RemoteException e) {
83          	// TODO: handle
84          } catch (ServerAPIConnectionException e) {
85          	// TODO: handle
86          }
87      }
88  
89  	private void preview(PageModel pageModel, Session4ClientAPIEnhancer session, POrderDescriptor<Serializable> descriptor) {
90  	    try {
91  			OrderInfo order = new OrderInfo(descriptor);
92  	        List<String> commands = session.previewOrder(order);
93  			pageModel.addIdentifiedObject(Param.COMMANDS, commands);
94          } catch (PasswordMismatchException e) {
95          	// TODO: handle
96          } catch (RemoteException e) {
97          	// TODO: handle
98          } catch (ServerAPIConnectionException e) {
99          	// TODO: handle
100         } catch (Exception e) {
101         	// TODO: handle
102         }
103     }
104 }
105 
106 
107