001    /*
002     * Copyright 2005-2007 The Kuali Foundation
003     * 
004     * 
005     * Licensed under the Educational Community License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     * 
009     * http://www.opensource.org/licenses/ecl2.php
010     * 
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.kuali.rice.kew.engine.node;
018    
019    import java.io.StringReader;
020    
021    import javax.xml.parsers.DocumentBuilder;
022    import javax.xml.parsers.DocumentBuilderFactory;
023    
024    import org.apache.log4j.Level;
025    import org.apache.log4j.Logger;
026    import org.kuali.rice.kew.engine.RouteContext;
027    import org.kuali.rice.kew.engine.RouteHelper;
028    import org.kuali.rice.kew.engine.node.var.PropertyScheme;
029    import org.w3c.dom.Document;
030    import org.w3c.dom.Element;
031    import org.w3c.dom.NodeList;
032    import org.xml.sax.InputSource;
033    
034    
035    /**
036     * A node which Logs messages to Log4j.
037     *
038     * @author Kuali Rice Team (rice.collab@kuali.org)
039     */
040    public class LogNode implements SimpleNode {
041        private static final Logger LOG = Logger.getLogger(LogNode.class);
042    
043        public SimpleResult process(RouteContext context, RouteHelper helper) throws Exception {
044            LOG.error("processing");
045            DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
046            String contentFragment = context.getNodeInstance().getRouteNode().getContentFragment();
047            LOG.error("contentFragment=" + contentFragment);
048            Document d = db.parse(new InputSource(new StringReader(contentFragment)));
049            Element e = d.getDocumentElement();
050            String name = null;
051            NodeList list = e.getElementsByTagName("log");
052            if (list != null && list.getLength() > 0) {
053                name = list.item(0).getTextContent();
054            }
055            list = e.getElementsByTagName("level");
056            String level = "info";
057            if (list != null && list.getLength() > 0) {
058                level = list.item(0).getTextContent().toLowerCase();
059            }
060            LOG.error("doc content: "+ context.getDocument().getDocContent());
061            String valueRef = e.getElementsByTagName("message").item(0).getTextContent();
062            Object retrievedVal = PropertiesUtil.retrieveProperty(valueRef, PropertyScheme.LITERAL_SCHEME, context);
063            LOG.error("retrieved value '" + retrievedVal + " for message '" + valueRef);
064            Logger l;
065            if (name == null) {
066                l = LOG;
067            } else {
068                l = Logger.getLogger(name);
069            }
070            l.log(Level.toLevel(level), retrievedVal);
071            return new SimpleResult(true);
072        }
073    
074    }