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Java > Open Source Codes > org > apache > jetspeed > portal > portlets > ServletInvokerPortlet


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17
18 package org.apache.jetspeed.portal.portlets;
19
20 import org.apache.ecs.ConcreteElement;
21 import org.apache.ecs.StringElement;
22
23 import org.apache.jetspeed.portal.PortletConfig;
24 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
25 import org.apache.jetspeed.services.logging.JetspeedLogger;
26 import org.apache.jetspeed.portal.portlets.AbstractPortlet;
27 import org.apache.jetspeed.util.servlet.EcsServletElement;
28
29 import org.apache.turbine.util.RunData;
30
31 /**
32  * The ServletInvokerPortlet invokes a servlet or JSP and displays the result.
33  *
34  * @author Thomas Schaeck (schaeck@de.ibm.com)
35  */
36 public class ServletInvokerPortlet extends AbstractPortlet
37 {
38
39     /**
40      * Static initialization of the logger for this class
41      */
42     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(ServletInvokerPortlet.class.getName());
43
44   /**
45    * Returns an ECS concrete element that includes the servlet/JSP.
46    *
47    * The servlet/JSP will be invoked when the ECS tree is written
48    * to the servlet output stream and add its output to the stream.
49    */
50   public ConcreteElement getContent(RunData rundata) {
51     // !!! Need to check this - is this the right rundata object ? !!!
52 PortletConfig pc = this.getPortletConfig();
53
54     String JavaDoc servletURL = null;
55     try {
56       servletURL = (String JavaDoc) this.getPortletConfig().getInitParameter("url");
57       return new EcsServletElement(rundata, servletURL);
58     } catch (Exception JavaDoc e) {
59       String JavaDoc message = "ServletInvokerPortlet: Error invoking "
60                        + servletURL + ": " + e.getMessage();
61       logger.error(message, e);
62       return new StringElement(message);
63     }
64   } }
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