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1 package edu.rice.rubis.beans;
2
3 import java.rmi.RemoteException  ;
4 import javax.ejb.SessionBean ;
5 import javax.ejb.SessionContext ;
6 import javax.ejb.FinderException ;
7 import javax.ejb.ObjectNotFoundException ;
8 import javax.ejb.CreateException ;
9 import javax.ejb.RemoveException ;
10 import javax.ejb.EJBException ;
11 import javax.naming.Context ;
12 import javax.naming.InitialContext ;
13 import javax.rmi.PortableRemoteObject ;
14 import javax.sql.DataSource ;
15 import java.io.Serializable ;
16 import javax.transaction.UserTransaction ;
17 import java.util.Enumeration ;
18
19
25
26 public class SB_ViewBidHistoryBean implements SessionBean
27 {
28 protected SessionContext sessionContext;
29 protected Context initialContext = null;
30 protected DataSource dataSource = null;
31
33
34
40 public String getBidHistory(Integer itemId) throws RemoteException
41 {
42 StringBuffer html;
43 ItemHome iHome;
44 Item item;
45 Query query;
46 QueryHome qHome;
47 BidHome bidHome;
48 Bid bid;
49 Enumeration bidList=null;
50
51 try
52 {
53 qHome = (QueryHome)PortableRemoteObject.narrow(initialContext.lookup("java:comp/env/ejb/Query"), QueryHome.class);
54 query = qHome.create();
55 }
56 catch (Exception e)
57 {
58 throw new RemoteException ("Cannot lookup Query: " +e);
59 }
60 try
61 {
62 iHome = (ItemHome)PortableRemoteObject.narrow(initialContext.lookup("java:comp/env/ejb/Item"), ItemHome.class);
63 item = iHome.findByPrimaryKey(new ItemPK(itemId));
64 html = new StringBuffer ("<center><h3>Bid History for "+item.getName()+"<br></h3></center>");
65 }
66 catch (Exception e)
67 {
68 throw new RemoteException ("Cannot lookup Item ("+itemId+"): " +e);
69 }
70 try
71 {
72 query = qHome.create();
73 bidList = query.getItemBidHistory(itemId).elements();
74 }
75 catch (Exception e)
76 {
77 throw new RemoteException ("Exception getting bids list: " +e+"<br>");
78 }
79 if ((bidList == null) || (!bidList.hasMoreElements()))
80 {
81 return html.append("<h3>There is no bid corresponding to this item.</h3><br>").toString();
82 }
83 try
85 {
86 bidHome = (BidHome)PortableRemoteObject.narrow(initialContext.lookup("java:comp/env/ejb/Bid"),
87 BidHome.class);
88 }
89 catch (Exception e)
90 {
91 throw new RemoteException ("Cannot lookup Bid: " +e+"<br>");
92 }
93 try
94 {
95 html.append(printBidHistoryHeader());
96 while (bidList.hasMoreElements())
97 {
98 bid = bidHome.findByPrimaryKey((BidPK)bidList.nextElement());
100 html.append(bid.printBidHistory());
101 }
102 html.append(printBidHistoryFooter());
103 }
104 catch (Exception e)
105 {
106 throw new RemoteException ("Exception getting bid: " + e +"<br>");
107 }
108 return html.toString();
109 }
110
111
117 public String printBidHistoryHeader()
118 {
119 return "<TABLE border=\"1\" summary=\"List of bids\">\n<THEAD>\n"+
120 "<TR><TH>User ID<TH>Bid amount<TH>Date of bid\n<TBODY>\n";
121 }
122
123
129 public String printBidHistoryFooter()
130 {
131 return "</TABLE>\n";
132 }
133
134
136
139 public void ejbCreate() throws CreateException , RemoteException
140 {
141 }
142
143
144 public void ejbActivate() throws RemoteException {}
145
146 public void ejbPassivate() throws RemoteException {}
147
148 public void ejbRemove() throws RemoteException {}
149
150
151
160 public void setSessionContext(SessionContext sessionContext) throws RemoteException
161 {
162 this.sessionContext = sessionContext;
163 if (dataSource == null)
164 {
165
167 try
168 {
169 initialContext = new InitialContext ();
170 dataSource = (DataSource )initialContext.lookup("java:comp/env/jdbc/rubis");
171 }
172 catch (Exception e)
173 {
174 throw new RemoteException ("Cannot get JNDI InitialContext");
175 }
176 }
177 }
178
179 }
180 |
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