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package org.apache.velocity.runtime.log;

/*
 * 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.    
 */

import org.apache.velocity.runtime.RuntimeServices;

/**
 * Old base interface that old logging systems needed to implement.
 *
 * @author Jon S. Stevens
 * @author Geir Magnusson Jr.
 * @deprecated Use LogChute instead!
 * @version $Id: LogSystem.java 463298 2006-10-12 16:10:32Z henning $
 */
public interface LogSystem
{
    /**
     * @deprecated This is unused and meaningless
     */
    public final static boolean DEBUG_ON = true;

    /**
     * ID for debug messages.
     */
    public final static int DEBUG_ID = 0;

    /**
     * ID for info messages.
     */
    public final static int INFO_ID = 1;

    /**
     * ID for warning messages.
     */
    public final static int WARN_ID = 2;

    /**
     * ID for error messages.
     */
    public final static int ERROR_ID = 3;

    /**
     * Initializes this LogSystem.
     * @param rs
     * @throws Exception
     */
    public void init( RuntimeServices rs ) throws Exception;

    /**
     * @param level
     * @param message
     * @deprecated Use log(level, message).
     */
    public void logVelocityMessage(int level, String message);
}