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1
25
26 package com.j2biz.blogunity.web.actions.blog;
27
28 import java.text.DateFormat  ;
29 import java.text.SimpleDateFormat ;
30 import java.util.ArrayList ;
31 import java.util.Iterator ;
32 import java.util.List ;
33
34 import javax.servlet.ServletException ;
35 import javax.servlet.http.HttpServletRequest ;
36 import javax.servlet.http.HttpServletResponse ;
37
38 import org.apache.commons.lang.StringUtils;
39 import org.apache.commons.logging.Log;
40 import org.apache.commons.logging.LogFactory;
41
42 import com.j2biz.blogunity.BlogunityManager;
43 import com.j2biz.blogunity.dao.EntryDAO;
44 import com.j2biz.blogunity.exception.BlogunityException;
45 import com.j2biz.blogunity.i18n.I18N;
46 import com.j2biz.blogunity.i18n.I18NStatusFactory;
47 import com.j2biz.blogunity.pojo.Blog;
48 import com.j2biz.blogunity.pojo.Category;
49 import com.j2biz.blogunity.pojo.Entry;
50 import com.j2biz.blogunity.web.IActionResult;
51 import com.j2biz.blogunity.web.actions.AbstractAction;
52 import com.sun.syndication.feed.synd.SyndCategory;
53 import com.sun.syndication.feed.synd.SyndCategoryImpl;
54 import com.sun.syndication.feed.synd.SyndContent;
55 import com.sun.syndication.feed.synd.SyndContentImpl;
56 import com.sun.syndication.feed.synd.SyndEntry;
57 import com.sun.syndication.feed.synd.SyndEntryImpl;
58 import com.sun.syndication.feed.synd.SyndFeed;
59 import com.sun.syndication.feed.synd.SyndFeedImpl;
60 import com.sun.syndication.io.SyndFeedOutput;
61
62 public abstract class AbstractFeedAction extends AbstractAction {
63
64
67 private static final Log log = LogFactory.getLog(AtomFeedAction.class);
68
69 private Blog blog;
70
71 private String categoryId;
72
73 private static final String MIME_TYPE = "application/xml; charset=UTF-8";
74
75 private static final String DATE_FORMAT = "yyyy-MM-dd";
76
77
80 public AbstractFeedAction(Blog blog) {
81 this(blog, null);
82 }
83
84 public AbstractFeedAction(Blog blog, String categoryId) {
85 this.blog = blog;
86 this.categoryId = categoryId;
87 }
88
89 public abstract String getFeedtype();
90
91
97 public IActionResult execute(HttpServletRequest request, HttpServletResponse response)
98 throws BlogunityException {
99
100 if (log.isDebugEnabled()) {
101 log.debug("Atom-Feed for blog '" + blog + " requested!");
102 }
103
104 outputFeed(request, response, getFeedtype());
105
106 return IActionResult.NULL_RESULT;
107
108 }
109
110
114 private void outputFeed(HttpServletRequest request, HttpServletResponse response,
115 String feedType) throws BlogunityException {
116
117 if (blog == null) {
118 BlogunityException ex = new BlogunityException(I18NStatusFactory.create(
120 I18N.ERRORS.NOT_FOUND, "blog"));
121 throw ex;
122 }
123
124 try {
125 SyndFeed feed = getFeed(request, blog);
126 feed.setFeedType(feedType);
127
128 response.setContentType(MIME_TYPE);
129
130 SyndFeedOutput output = new SyndFeedOutput();
131 output.output(feed, response.getWriter());
132 } catch (Exception ex) {
133 String msg = I18N.ERRORS.COULD_NOT_GENERATE_FEED;
134 log.error(msg, ex);
135
136 BlogunityException e = new BlogunityException(I18NStatusFactory.create(
138 I18N.ERRORS.COULD_NOT_GENERATE_FEED, ex));
139 throw e;
140
141 }
142
143 }
144
145 private SyndFeed getFeed(HttpServletRequest request, Blog b) throws BlogunityException {
146
147 DateFormat dateParser = new SimpleDateFormat (DATE_FORMAT);
148
149 SyndFeed feed = new SyndFeedImpl();
150 String blogUrl = BlogunityManager.getBase() + "/blogs/" + b.getUrlName();
151
152 feed.setTitle(b.getFullName());
153 feed.setLink(blogUrl);
154 feed.setDescription((b.getDescription() != null) ? b.getDescription() : "");
155 feed.setCopyright("Copyright by " + b.getFounder().getNickname());
156 feed.setAuthor(b.getFounder().getNickname());
157 feed.setPublishedDate(b.getLastModified());
158
159 List categories = new ArrayList ();
161 for (Iterator i = b.getCategories().iterator(); i.hasNext();) {
162 Category cat = (Category) i.next();
163 SyndCategory c = new SyndCategoryImpl();
164 c.setName(cat.getName());
165 categories.add(c);
166
167 }
168 feed.setCategories(categories);
169
170 List syndEntries = new ArrayList ();
172 List entries;
173 EntryDAO dao = new EntryDAO();
174 if (StringUtils.isNotEmpty(categoryId)) {
176
177 try {
178 Long catIdLong = new Long (categoryId);
179 entries = dao.getPaginatedEntriesByCategory(b.getId(), catIdLong, 0, 20);
180 } catch (NumberFormatException e) {
181 entries = dao.getPaginatedEntries(b.getUrlName(), 0, 20);
182 }
183
184 } else {
185 entries = dao.getPaginatedEntries(b.getUrlName(), 0, 20);
186 }
187
188 for (Iterator i = entries.iterator(); i.hasNext();) {
189 Entry entry = (Entry) i.next();
190
191 SyndEntry e = new SyndEntryImpl();
192 e.setTitle(entry.getTitle());
193
194 e.setLink(blogUrl + entry.getPermalink());
195 e.setPublishedDate(entry.getCreateTime());
196
197 SyndContent description = new SyndContentImpl();
198 description.setType("text/html");
199 String value = "";
200 if (StringUtils.isNotEmpty(entry.getExcerpt())) value = entry.getExcerpt() + "<br/>"
201 + entry.getBody();
202 else
203 value = entry.getBody();
204
205 description.setValue(value);
206
207 e.setDescription(description);
208
209 syndEntries.add(e);
210
211 }
212
213 feed.setEntries(syndEntries);
214
215 return feed;
216 }
217
218 } |
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