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1
25
26 package com.j2biz.blogunity.web.servlet;
27
28 import java.io.IOException  ;
29 import java.io.InputStream ;
30 import java.util.Properties ;
31
32 import javax.servlet.ServletException ;
33 import javax.servlet.http.HttpServlet ;
34 import javax.servlet.http.HttpServletRequest ;
35 import javax.servlet.http.HttpServletResponse ;
36
37 import org.apache.commons.logging.Log;
38 import org.apache.commons.logging.LogFactory;
39
40 import com.j2biz.blogunity.exception.BlogunityException;
41 import com.j2biz.blogunity.exception.BlogunityRuntimeException;
42 import com.j2biz.blogunity.i18n.I18N;
43 import com.j2biz.blogunity.i18n.I18NStatusFactory;
44 import com.j2biz.blogunity.web.IActionResult;
45 import com.j2biz.blogunity.web.actions.AbstractAction;
46
47
54 public abstract class ActionServlet extends HttpServlet {
55 private static final Log log = LogFactory.getLog(MyServlet.class);
56
57 protected Properties actionProperties = null;
58
59 public ActionServlet() {
60
61 actionProperties = new Properties ();
63 InputStream in = getClass().getResourceAsStream(getActionPropertiesPath());
64
65 try {
66 actionProperties.load(in);
67 in.close();
68 } catch (IOException e) {
69 throw new BlogunityRuntimeException(I18NStatusFactory.create(
70 I18N.ERRORS.ACTION_INITIALIZATION_FAILED, e));
71 }
72 }
73
74 protected String getActionName(HttpServletRequest request) {
75 String requestAction = request.getRequestURI();
76 if (log.isDebugEnabled()) {
77 log.debug("Requested action: " + requestAction);
78 }
79 requestAction = requestAction.substring(request.getContextPath().length()
80 + getServletPrefix().length() + 1, requestAction.length());
81 if (requestAction.length() == 0) {
82 requestAction = getDefaultActionName();
83 } else
84 requestAction = requestAction.substring(1);
85
86 return requestAction;
87
88 }
89
90
96 protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1)
97 throws ServletException , IOException {
98 doJob(arg0, arg1);
99 }
100
101
107 protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1)
108 throws ServletException , IOException {
109 doJob(arg0, arg1);
110 }
111
112 protected abstract String getActionPropertiesPath();
113
114 protected abstract void doJob(HttpServletRequest request, HttpServletResponse response)
115 throws ServletException , IOException ;
116
117 protected abstract String getServletPrefix();
118
119 protected abstract String getDefaultActionName();
120
121 protected void executeAction(AbstractAction action, HttpServletRequest request,
122 HttpServletResponse response) throws BlogunityException {
123
124 String actionName = "/" + getServletPrefix() + "/" + getActionName(request);
125
126 action.init(request, response, actionName);
127 IActionResult result = action.execute(request, response);
128
129 if (result != null) {
130
131 try {
132 if (result.getType() == IActionResult.FORWARD) {
133 request.getRequestDispatcher(result.getPath()).forward(request, response);
134 } else if (result.getType() == IActionResult.INCLUDE) {
135 request.getRequestDispatcher(result.getPath()).include(request, response);
136 } else if (result.getType() == IActionResult.REDIRECT) {
137 response.sendRedirect(request.getContextPath() + result.getPath());
138 } else {
139 throw new BlogunityException(I18NStatusFactory
140 .create(I18N.ERRORS.ACTION_FORWARD_FAILED));
141 }
142 } catch (Exception e) {
143
144 if (log.isErrorEnabled()) {
145 log.error("Error executing forward!", e);
146 }
147
148 throw new BlogunityException(I18NStatusFactory.create(
149 I18N.ERRORS.ACTION_FORWARD_FAILED, e));
150 }
151
152 } else {
153 if (log.isDebugEnabled()) {
154 log.debug("Execution of the action='" + action.getClass()
155 + "' returned result: NULL! do nothing...");
156 }
157 }
158
159 }
160
161 } |
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