001package org.eclipse.aether.spi.log;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022/**
023 * A simple logger to facilitate emission of diagnostic messages. In general, unrecoverable errors should be reported
024 * via exceptions and informational notifications should be reported via events, hence this logger interface focuses on
025 * support for tracing.
026 *
027 * @deprecated Use SLF4J instead
028 */
029@Deprecated
030public interface Logger
031{
032
033    /**
034     * Indicates whether debug logging is enabled.
035     *
036     * @return {@code true} if debug logging is enabled, {@code false} otherwise.
037     */
038    boolean isDebugEnabled();
039
040    /**
041     * Emits the specified message.
042     *
043     * @param msg The message to log, must not be {@code null}.
044     */
045    void debug( String msg );
046
047    /**
048     * Emits the specified message along with a stack trace of the given exception.
049     *
050     * @param msg The message to log, must not be {@code null}.
051     * @param error The exception to log, may be {@code null}.
052     */
053    void debug( String msg, Throwable error );
054
055    /**
056     * Indicates whether warn logging is enabled.
057     *
058     * @return {@code true} if warn logging is enabled, {@code false} otherwise.
059     */
060    boolean isWarnEnabled();
061
062    /**
063     * Emits the specified message.
064     *
065     * @param msg The message to log, must not be {@code null}.
066     */
067    void warn( String msg );
068
069    /**
070     * Emits the specified message along with a stack trace of the given exception.
071     *
072     * @param msg The message to log, must not be {@code null}.
073     * @param error The exception to log, may be {@code null}.
074     */
075    void warn( String msg, Throwable error );
076
077}