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Adding myRssPortlet to Liferay	Benjamin Bratkus	March 6, 2006 1:27 AM
Adding myRssPortlet to Liferay	Tri www.VSSIC.com	March 26, 2006 7:49 PM

Adding myRssPortlet to Liferay

March 6, 2006 1:27 AM

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Benjamin Bratkus

Rank: Junior Member

Posts: 61

Join Date: March 5, 2006

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Hello community, i want to deploy my own rss portlet into liferay but i get the following msg instead of my portlet "RssPortlet is temporarily unavailable." actually i don't know whats wrong. can anyone give me some additional hints? i tryed to integrate the portlet via your doku "hot deployment" i 've used the ant task deply in the folder /myPortlets which i created in the root folder of liferay in one layer with the folders lib, client, bin, server. best regards, ben war-structure: /WEB-INF /tlds/taglib.tld /tld/portlet.tld /lib/xalan-2.4.1.jar /rss4j-0.9.2.jar /conf/html.xsl /Rss10.xsl /Rss20.xml /classes/....../RssPortlet.class /portlet.xml /web.xml /pics /META-INF /jsp /data portlet.xml <?xml version="1.0" encoding="UTF-8"?> <portlet-app xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd" version="1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd <a href="http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd">" target="_blank">http://java.sun.com/xml/ns/portlet/portlet...0.xsd"></a> <portlet> <portlet-name>RssPortlet</portlet-name> <portlet-class>de.oio.portlets.RssPortlet</portlet-class>  <init-param> <name>RSS10_XSL</name> <value>/WEB-INF/conf/Rss10.xsl</value> </init-param>  <init-param> <name>RSS20_XSL</name> <value>/WEB-INF/conf/Rss20.xsl</value> </init-param>  <init-param> <name>url</name> <value>http://www.oio.de/xml/feeds/oio-rss.xml</value> </init-param> <expiration-cache>30</expiration-cache> <supports> <mime-type>text/html</mime-type> <portlet-mode>edit</portlet-mode> <portlet-mode>help</portlet-mode> </supports> <supported-locale>de-DE</supported-locale> <portlet-info> <title>RssPortlet</title> <short-title>RSS</short-title> <keywords>RSS</keywords> </portlet-info> <portlet-preferences> <preference> <name>RssXml</name> <value>http://www.oio.de/xml/feeds/oio-rss.xml</value> <value>http://www.gnupg.org/news.en.rss</value> <value>http://developers.sun.com/rss/sdn.xml</value> <value> <a href="http://www.theserverside.com/rss/theserverside-0.9.rdf</value>" target="_blank">http://www.theserverside.com/rss/theserver...f</value></a> <value>http://rss.com.com/2547-12-0-20.xml</value> <value> <a href="http://headlines.internet.com/internetnews/top-news/news.rss</value>" target="_blank">http://headlines.internet.com/internetnews...s</value></a> <value>http://www.sciencedaily.com/newsfeed.xml</value> <value>http://www.heise.de/newsticker/heise.rdf</value> <value> <a href="http://www.spiegel.de/schlagzeilen/rss/0,5291,,00.xml</value>" target="_blank">http://www.spiegel.de/schlagzeilen/rss/0,5...l</value></a> <value>http://www.javamagazin.de/rss/?version=2.0</value> </preference> </portlet-preferences> </portlet> </portlet-app> web.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE web-app (View Source for full doctype...)> - <web-app> <display-name>RssPortlet</display-name> </web-app> class package de.oio.portlets; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.net.MalformedURLException; import java.net.URL; import java.util.Arrays; import java.util.TreeSet; import javax.portlet.ActionRequest; import javax.portlet.ActionResponse; import javax.portlet.GenericPortlet; import javax.portlet.PortletException; import javax.portlet.PortletMode; import javax.portlet.PortletPreferences; import javax.portlet.PortletSecurityException; import javax.portlet.PortletURL; import javax.portlet.RenderRequest; import javax.portlet.RenderResponse; import javax.portlet.UnavailableException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.Source; import javax.xml.transform.Templates; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import javax.xml.transform.stream.StreamSource; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.xml.sax.SAXException; /** * * * @author Orientation in Objects * * * @version 1.0 * * */ public class RssPortlet extends GenericPortlet { /* content type? */ private static final String CONTENT_TYPE = "text/html;charset=UTF-8"; /* Rss preferences string */ private static final String RSS_XML_PREFS = "RssXml"; /* Rss preferences default */ private static final String[] RSS_XML_DEFAULT = new String[] { "http://www.oio.de/xml/feeds/oio-rss.xml" }; /* the compiled xsl for the version 1.0 */ private Templates template10; /* the compiled xsl for the version 2.0 */ private Templates template20; /** * the init method compiling the xsl and put the xsl in the application * scope */ public void init() { try { String rss10 = this.getInitParameter("RSS10_XSL"); String rss20 = this.getInitParameter("RSS20_XSL"); this.template10 = this.getTemplateFromFile(rss10); this.template20 = this.getTemplateFromFile(rss20); } catch (Exception e) { e.printStackTrace(); } } /** * the processAction method reacts on a portlet action * */ public void processAction(ActionRequest request, ActionResponse response) throws UnavailableException, PortletSecurityException, PortletException, IOException { String errorMessage = null; try { checkPreferences(request); } catch (Exception e) { throw new PortletException(e); } String url = request.getParameter("inputXml"); if ((url != null) && url.startsWith("http")) { try { new URL(url).openStream(); PortletPreferences prefs = request.getPreferences(); TreeSet existingPrefs = new TreeSet(Arrays.asList(prefs.getValues(RSS_XML_PREFS, RSS_XML_DEFAULT))); existingPrefs.add(url); prefs.setValues(RSS_XML_PREFS, (String[]) existingPrefs.toArray(new String[0])); prefs.store(); } catch (Exception e) { errorMessage = e.getMessage(); } response.setRenderParameter("selectXml", url); response.setRenderParameter("inputXml", url); response.setPortletMode(PortletMode.VIEW); if (null != errorMessage) { response.setRenderParameter("errorMessage", errorMessage); } } String selectXml = request.getParameter("selectXml"); if (null != selectXml) { response.setRenderParameter("selectXml", selectXml); } } private void checkPreferences(ActionRequest request) throws Exception { String[] checkPrefs = request.getParameterValues("check"); if (checkPrefs != null) { PortletPreferences prefs = request.getPreferences(); TreeSet prefTreeSet = new TreeSet(Arrays.asList(checkPrefs)); prefs.setValues(RSS_XML_PREFS, (String[]) prefTreeSet.toArray(new String[0])); prefs.store(); } } /** * Allows the user to add more rss feeds, if edit-mode is supported * * @param request * the current action request * @throws Exception */ protected void doEdit(RenderRequest request, RenderResponse response) throws UnavailableException, PortletSecurityException, PortletException, IOException { response.setContentType(CONTENT_TYPE); StringBuffer content = new StringBuffer(); content.append("<table>"); /* builds a form containing a portlet action URL for targeting itself */ content.append("<form name=\"inputForm\" target=\"_self\" "); content.append("method=\"POST\" action=\""); content.append(response.createActionURL().toString() + "\">"); /* get porlet preferences to request the rss feed destinations */ PortletPreferences prefs = request.getPreferences(); String[] rssSources = prefs.getValues(RSS_XML_PREFS, RSS_XML_DEFAULT); for (int i = 0; i < rssSources.length; i++) { content.append("<tr><td>"); content.append("<input type=\"checkbox\" name=\"check\" "); content.append("value=\"" + rssSources + "\" CHECKED >"); content.append(rssSources); content.append("</td></tr>"); } content.append("<tr><td>"); content.append("Additional RSS Feed:"); content.append("<input type=\"text\" name=\"inputXml\" value=\"\">"); content.append("<input name=\"inputSubmit\" type=\"submit\" value=\"submit\">"); content.append("</td></tr></form></table>"); response.getWriter().println(content.toString()); } protected void doHelp(RenderRequest request, RenderResponse response) throws UnavailableException, PortletSecurityException, PortletException, IOException { response.setContentType(CONTENT_TYPE); StringBuffer content = new StringBuffer(); content.append("<table><tr><td>"); content.append("The RSS Portlet transforms newsfeed using a default stylesheet. "); content .append("Note that not all newsfeeds will transform correctly, but none should throw an error. "); content.append("To add or remove newfeeds, change the portlet preferences. "); PortletURL renderURL = response.createRenderURL(); renderURL.setPortletMode(PortletMode.VIEW); content.append("<a href=\"" + renderURL.toString() + "\">back</a>"); content.append("</td></tr></table>"); response.getWriter().println(content.toString()); } protected void doView(RenderRequest request, RenderResponse response) throws UnavailableException, PortletSecurityException, PortletException, IOException { response.setProperty("expiration-cache", "125"); response.setContentType(CONTENT_TYPE); StringBuffer content = new StringBuffer(); String selectedXml = null; try { selectedXml = request.getParameter("selectXml"); PrintWriter out = response.getWriter(); String errorMessage = request.getParameter("errorMessage"); if (errorMessage != null) { addHTMLErrorMessage(content, errorMessage); } content.append("<table>"); content.append("<form name=\"selectForm\" target=\"_self\" "); content.append("method=\"POST\" action=\""); content.append(response.createActionURL().toString() + "\">"); content.append("<tr><td>"); PortletURL renderURL = response.createRenderURL(); renderURL.setPortletMode(PortletMode.HELP); content.append("<a href=\"" + renderURL + "\">help</a>"); content.append("</td></tr><tr><td> </td></tr><tr><td>"); /* get porlet preferences to request the rss feed destinations */ PortletPreferences prefs = request.getPreferences(); String[] rssSources = prefs.getValues(RSS_XML_PREFS, RSS_XML_DEFAULT); addHTMLSelectOption(content, "selectXml", selectedXml, rssSources); content.append("</td><td>"); content.append("<input name=\"selectSubmit\" type=\"submit\" value=\"go\">"); content.append("</td><td></td></tr>"); content.append("</form></table>"); out.println(content.toString()); addTransformedRSSContent(request, selectedXml, out); } catch (Exception e) { throw new PortletException(e); } } /** * @param request * the current render request * @param selectedXml * the selected String value for the RSS XML source * @param out * the current writer object * @throws PortletException * @throws IOException */ private void addTransformedRSSContent(RenderRequest request, String selectedXml, PrintWriter out) throws PortletException, IOException { InputStream xmlInput = null; try { if (selectedXml == null) { selectedXml = request.getPreferences().getValue(RSS_XML_PREFS, RSS_XML_DEFAULT[0]); } xmlInput = new URL(selectedXml).openStream(); if (xmlInput == null) { throw new PortletException("No XML found."); } DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Transformer transformer = this.template10.newTransformer(); Source source = null; try { Document document = builder.parse(xmlInput); Element element = document.getDocumentElement(); if (element.hasAttribute("version") && element.getAttribute("version").equals("2.0")) { transformer = this.template20.newTransformer(); } source = new DOMSource(document); } catch (SAXException saxe) { source = new StreamSource(xmlInput); } StreamResult output = new StreamResult(out); transformer.transform(source, output); } catch (MalformedURLException e) { throw new PortletException(e); } catch (IOException e) { throw new PortletException(e); } catch (ParserConfigurationException e) { throw new PortletException(e); } catch (TransformerConfigurationException e) { throw new PortletException(e); } catch (TransformerException e) { throw new PortletException(e); } finally { if (xmlInput != null) { xmlInput.close(); } } } /** * @param content * the buffer to write in * @param name * the name for the HTML select element * @param selectedValue * the selected value * @param sources * a string array containing the strings for the option elements */ private void addHTMLSelectOption(StringBuffer content, String name, String selectedValue, String[] sources) { content.append("<select name=\"" + name + "\">"); for (int i = 0; i < sources.length; i++) { content.append("<option value=\"" + sources + "\""); if ((selectedValue != null) && sources.equals(selectedValue)) { content.append(" SELECTED "); } content.append(">" + sources + "</option>"); } content.append("</select>"); } /** * Adds a HTML error message to a specified string buffer * * @param content * the buffer to write in * @param errorMessage * the message that should be included in the response */ private void addHTMLErrorMessage(StringBuffer content, String errorMessage) { content.append("<table><tr><td>"); content.append("" + errorMessage + ""); content.append("</td></tr></table>"); } /** * Reads the content from the given xsl filename and transforms it into a * new template object. * * @param filename * the filename of the RSS xsl source file * @return a new Templates object * @throws TransformerConfigurationException */ private Templates getTemplateFromFile(String filename) throws TransformerConfigurationException { InputStream xslstream = this.getPortletContext().getResourceAsStream(filename); StreamSource source = new StreamSource(xslstream); TransformerFactory factory = TransformerFactory.newInstance(); return factory.newTemplates(source); } } the war archive was too big to be added to the post .. sorry for that.

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Adding myRssPortlet to Liferay

March 26, 2006 7:49 PM

Answer

Tri www.VSSIC.com

Rank: Junior Member

Posts: 31

Join Date: June 8, 2005