svn commit: r507364 - in /ofbiz/trunk/framework: common/servicedef/services.xml webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java

[jaz-3]

Author: jaz
Date: Tue Feb 13 18:54:29 2007
New Revision: 507364

URL: http://svn.apache.org/viewvc?view=rev&rev=507364
Log:
implemented RomeEventHandler; calls a service (should implement the rssFeedInterface which returns a WireFeed object) to generate a RSS feed; returns the feed to the browser

Added:
    ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java   (with props)
Modified:
    ofbiz/trunk/framework/common/servicedef/services.xml

Modified: ofbiz/trunk/framework/common/servicedef/services.xml
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/common/servicedef/services.xml?view=diff&rev=507364&r1=507363&r2=507364
==============================================================================
--- ofbiz/trunk/framework/common/servicedef/services.xml (original)
+++ ofbiz/trunk/framework/common/servicedef/services.xml Tue Feb 13 18:54:29 2007
@@ -396,4 +396,13 @@
              location="org/ofbiz/common/permission/CommonPermissionServices.xml" invoke="genericBasePermissionCheck">
         <implements service="permissionInterface"/>
     </service>
+
+    <!-- generic RSS feed interface -->
+    <service name="rssFeedInterface" engine="interface">
+        <description>Interface for ROME RSS feed services; should return the WireFeed object (serializable)</description>
+        <attribute name="feedType" type="String" mode="IN" optional="false"/>
+        <attribute name="mainLink" type="String" mode="IN" optional="false"/>
+        <attribute name="entryLink" type="String" mode="IN" optional="false"/>        
+        <attribute name="wireFeed" type="com.sun.syndication.feed.WireFeed" mode="OUT" optional="false"/>
+    </service>
 </services>

Added: ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java
URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java?view=auto&rev=507364
==============================================================================
--- ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java (added)
+++ ofbiz/trunk/framework/webapp/src/org/ofbiz/webapp/event/RomeEventHandler.java Tue Feb 13 18:54:29 2007
@@ -0,0 +1,94 @@
+/*
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License.  You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied.  See the License for the
+ specific language governing permissions and limitations
+ under the License.
+ */
+
+package org.ofbiz.webapp.event;
+
+import org.ofbiz.webapp.control.RequestHandler;
+import org.ofbiz.base.util.Debug;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.sun.syndication.feed.WireFeed;
+import com.sun.syndication.io.WireFeedOutput;
+import com.sun.syndication.io.FeedException;
+
+import java.io.IOException;
+
+/**
+ * RomeEventHandler
+ */
+public class RomeEventHandler implements EventHandler {
+
+    public static final String module = RomeEventHandler.class.getName();
+    public static final String mime = "application/xml; charset=UTF-8";
+    public static final String defaultFeedType = "rss_2.0";
+
+    protected RequestHandler handler;
+    protected ServletContext context;
+    protected EventHandler service;
+    protected WireFeedOutput out;
+
+    public void init(ServletContext context) throws EventHandlerException {
+        this.context = context;
+        this.handler = (RequestHandler) context.getAttribute("_REQUEST_HANDLER_");
+        if (this.handler == null) {
+            throw new EventHandlerException("No request handler found in servlet context!");
+        }
+        
+        // get the service event handler
+        this.service = new ServiceEventHandler();
+        this.service.init(context);
+        this.out = new WireFeedOutput();
+    }
+
+    public String invoke(String eventPath, String eventMethod, HttpServletRequest request, HttpServletResponse response) throws EventHandlerException {
+        // generate the main and entry links
+        String entryLinkReq = request.getParameter("entryLinkReq");
+        String mainLinkReq = request.getParameter("mainLinkReq");
+
+        // create the links; but the query string must be created by the service
+        String entryLink = handler.makeLink(request, response, entryLinkReq, true, false, false);
+        String mainLink = handler.makeLink(request, response, mainLinkReq, true, false, false);
+        request.setAttribute("entryLink", entryLink);
+        request.setAttribute("mainLink", mainLink);
+
+        String feedType = request.getParameter("feedType");
+        if (feedType == null) {
+            request.setAttribute("feedType", defaultFeedType);
+        }
+
+        // invoke the feed generator service (implements rssFeedInterface)
+        String respCode = service.invoke(eventPath, eventMethod, request, response);
+
+        // pull out the RSS feed from the request attributes
+        WireFeed wireFeed = (WireFeed) request.getAttribute("wireFeed");
+        response.setContentType(mime);
+        try {
+            out.output(wireFeed, response.getWriter());
+        } catch (IOException e) {
+            throw new EventHandlerException("Unable to get response writer", e);
+        } catch (FeedException e) {
+            throw new EventHandlerException("Unable to write RSS feed", e);
+        }
+        
+        return respCode;
+    }
+}

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