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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.eclipse.aether.spi.log;
20  
21  /**
22   * A simple logger to facilitate emission of diagnostic messages. In general, unrecoverable errors should be reported
23   * via exceptions and informational notifications should be reported via events, hence this logger interface focuses on
24   * support for tracing.
25   *
26   * @deprecated Use SLF4J instead
27   */
28  @Deprecated
29  public interface Logger {
30  
31      /**
32       * Indicates whether debug logging is enabled.
33       *
34       * @return {@code true} if debug logging is enabled, {@code false} otherwise.
35       */
36      boolean isDebugEnabled();
37  
38      /**
39       * Emits the specified message.
40       *
41       * @param msg The message to log, must not be {@code null}.
42       */
43      void debug(String msg);
44  
45      /**
46       * Emits the specified message along with a stack trace of the given exception.
47       *
48       * @param msg The message to log, must not be {@code null}.
49       * @param error The exception to log, may be {@code null}.
50       */
51      void debug(String msg, Throwable error);
52  
53      /**
54       * Indicates whether warn logging is enabled.
55       *
56       * @return {@code true} if warn logging is enabled, {@code false} otherwise.
57       */
58      boolean isWarnEnabled();
59  
60      /**
61       * Emits the specified message.
62       *
63       * @param msg The message to log, must not be {@code null}.
64       */
65      void warn(String msg);
66  
67      /**
68       * Emits the specified message along with a stack trace of the given exception.
69       *
70       * @param msg The message to log, must not be {@code null}.
71       * @param error The exception to log, may be {@code null}.
72       */
73      void warn(String msg, Throwable error);
74  }