001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
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 */
017package org.apache.commons.scxml2.env;
018
019import java.io.Serializable;
020
021import org.apache.commons.logging.Log;
022import org.apache.commons.logging.LogFactory;
023import org.apache.commons.scxml2.SCXMLListener;
024import org.apache.commons.scxml2.model.EnterableState;
025import org.apache.commons.scxml2.model.Transition;
026import org.apache.commons.scxml2.model.TransitionTarget;
027
028
029/**
030 * Simple SCXML Listener that logs execution.
031 */
032public class SimpleSCXMLListener implements SCXMLListener, Serializable {
033
034    /** Serial version UID. */
035    private static final long serialVersionUID = 1L;
036    /** Log. */
037    private Log log = LogFactory.getLog(getClass());
038
039
040    /**
041     * @see SCXMLListener#onEntry(EnterableState)
042     */
043    public void onEntry(final EnterableState state) {
044        if (log.isInfoEnabled()) {
045            log.info("enter " + LogUtils.getTTPath(state));
046        }
047    }
048
049    /**
050     * @see SCXMLListener#onExit(EnterableState)
051     */
052    public void onExit(final EnterableState state) {
053        if (log.isInfoEnabled()) {
054            log.info("exit " + LogUtils.getTTPath(state));
055        }
056    }
057
058    /**
059* @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition,String)
060     */
061    public void onTransition(final TransitionTarget from,
062            final TransitionTarget to, final Transition transition, String event) {
063        if (log.isInfoEnabled()) {
064            log.info("transition " + LogUtils.transToString(from, to, transition, event));
065        }
066    }
067
068}
069