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1
23
24 package org.infoglue.cms.treeservice;
25
26 import java.io.IOException  ;
27 import java.io.PrintWriter ;
28 import java.net.URLEncoder ;
29 import java.util.ArrayList ;
30 import java.util.Enumeration ;
31 import java.util.Hashtable ;
32 import java.util.Iterator ;
33 import java.util.List ;
34
35 import javax.servlet.ServletConfig ;
36 import javax.servlet.ServletException ;
37 import javax.servlet.http.HttpServlet ;
38 import javax.servlet.http.HttpServletRequest ;
39 import javax.servlet.http.HttpServletResponse ;
40
41 import org.apache.log4j.Logger;
42 import org.infoglue.cms.net.CommunicationEnvelope;
43 import org.infoglue.cms.net.Node;
44
45 public abstract class JServiceBuilder extends HttpServlet
46 {
47 private final static Logger logger = Logger.getLogger(JServiceBuilder.class.getName());
48
49 protected HttpServletRequest request;
50
51 public void init(ServletConfig config) throws ServletException
52 {
53 super.init(config);
54 }
55
56 public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException
57 {
58 this.request = request;
59 Hashtable inHash = requestToHashtable(request);
60 logger.info("Got request...");
61
62 PrintWriter out = null;
63
64 try
65 {
66
67
68 out = response.getWriter();
70
71 CommunicationEnvelope requestEnvelope = deserializeEnvelope(inHash);
72 CommunicationEnvelope reponseEnvelope = execute(requestEnvelope);
73 String responseString = toEncodedString(serializeEnvelope(reponseEnvelope));
74
75 logger.info("Sending the string to the applet:" + responseString);
77 out.println(responseString);
78
79 out.flush();
80 out.close();
81 logger.info("Complete.");
82 }
83 catch (Exception e)
84 {
85 e.printStackTrace();
86 }
87 }
88
89
90
96
97 private String toEncodedString(Hashtable inHash) throws Exception
98 {
99 StringBuffer buffer = new StringBuffer ();
100 Enumeration names = inHash.keys();
101 while(names.hasMoreElements())
102 {
103 String name = names.nextElement().toString();
104 String value = inHash.get(name).toString();
105 buffer.append(URLEncoder.encode(name, "UTF-8") + "=" + URLEncoder.encode(value, "UTF-8"));
106 if(names.hasMoreElements())
107 {
108 buffer.append("&");
109 }
110 }
111 return buffer.toString();
112 }
113
114
115 private CommunicationEnvelope deserializeEnvelope(Hashtable hash)
116 {
117 CommunicationEnvelope communicationEnvelope = new CommunicationEnvelope();
118 communicationEnvelope.setAction("" + hash.get("action"));
119 communicationEnvelope.setStatus("" + hash.get("status"));
120 logger.info("Action:" + communicationEnvelope.getAction());
121 logger.info("Status:" + communicationEnvelope.getStatus());
122
123 List nodes = new ArrayList ();
124 int i = 0;
125 String id = (String )hash.get("nodeList." + i + ".id");
126 while(id != null)
127 {
128 Node n = new Node();
129 n.setId(new Integer (id));
130 n.setName((String )hash.get("nodeList." + i + ".name"));
131 n.setIsBranch(new Boolean ((String )hash.get("nodeList." + i + ".isBranch")));
132 nodes.add(n);
133 logger.info("Node:" + n);
134 i++;
135 id = (String )hash.get("nodeList." + i + ".id");
136 }
137 communicationEnvelope.setNodes(nodes);
138
139 return communicationEnvelope;
140 }
141
142
143 private Hashtable serializeEnvelope(CommunicationEnvelope requestEnvelope)
144 {
145 Hashtable hash = new Hashtable ();
146 logger.info("Serializing:" + requestEnvelope);
147 hash.put("action", requestEnvelope.getAction());
148 hash.put("status", requestEnvelope.getStatus());
149
150 List nodes = requestEnvelope.getNodes();
151 int i = 0;
152 Iterator iterator = nodes.iterator();
153 while(iterator.hasNext())
154 {
155 Node n = (Node)iterator.next();
156 hash.put("nodeList." + i + ".id", "" + n.getId());
157 hash.put("nodeList." + i + ".name", "" + n.getName());
158 hash.put("nodeList." + i + ".isBranch", "" + n.getIsBranch());
159 i++;
160 }
161
162 return hash;
163 }
164
165 public Hashtable requestToHashtable(HttpServletRequest req)
166 {
167 Hashtable input = new Hashtable ();
168
169 for (Enumeration e = req.getParameterNames(); e.hasMoreElements() ;)
170 {
171 String name = (String )e.nextElement();
172 String value = (String )req.getParameter(name);
173 input.put(name, value);
174 }
175
176 return input;
177
178 }
179
180
181 public abstract CommunicationEnvelope execute(CommunicationEnvelope envelope);
182 } |
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