/*

 * 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.apache.catalina.startup;

import org.apache.catalina.Engine;

import org.apache.catalina.Lifecycle;

import org.apache.catalina.LifecycleEvent;

import org.apache.catalina.LifecycleListener;

import org.apache.catalina.util.StringManager;

/**

 * Startup event listener for a <b>Engine</b> that configures the properties

 * of that Engine, and the associated defined contexts.

 *

 * @author Craig R. McClanahan

 */

public class EngineConfig

    implements LifecycleListener {

    protected static org.apache.juli.logging.Log log=

        org.apache.juli.logging.LogFactory.getLog( EngineConfig.class );

    // ----------------------------------------------------- Instance Variables

    /**

     * The Engine we are associated with.

     */

    protected Engine engine = null;

    /**

     * The string resources for this package.

     */

    protected static final StringManager sm =

        StringManager.getManager(Constants.Package);

    // --------------------------------------------------------- Public Methods

    /**

     * Process the START event for an associated Engine.

     *

     * @param event The lifecycle event that has occurred

     */

    public void lifecycleEvent(LifecycleEvent event) {

        // Identify the engine we are associated with

        try {

            engine = (Engine) event.getLifecycle();

        } catch (ClassCastException e) {

            log.error(sm.getString("engineConfig.cce", event.getLifecycle()), e);

            return;

        }

        // Process the event that has occurred

        if (event.getType().equals(Lifecycle.START_EVENT))

            start();

        else if (event.getType().equals(Lifecycle.STOP_EVENT))

            stop();

    }

    // -------------------------------------------------------- Protected Methods

    /**

     * Process a "start" event for this Engine.

     */

    protected void start() {

        if (engine.getLogger().isDebugEnabled())

            engine.getLogger().debug(sm.getString("engineConfig.start"));

    }

    /**

     * Process a "stop" event for this Engine.

     */

    protected void stop() {

        if (engine.getLogger().isDebugEnabled())

            engine.getLogger().debug(sm.getString("engineConfig.stop"));

    }

}