1 package org.apache.torque.generator.configuration.controller;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.commons.logging.Log;
23 import org.apache.commons.logging.LogFactory;
24 import org.apache.log4j.Level;
25 import org.apache.log4j.Logger;
26
27 /**
28 * The possible log levels. This implementation uses log4j internally,
29 * but the interface is agnostic of the logging framework.
30 */
31 public enum Loglevel
32 {
33 /** Loglevel trace. */
34 TRACE("trace", Level.TRACE),
35 /** Loglevel debug. */
36 DEBUG("debug", Level.DEBUG),
37 /** Loglevel info. */
38 INFO("info", Level.INFO),
39 /** Loglevel warn. */
40 WARN("warn", Level.WARN),
41 /** Loglevel error. */
42 ERROR("error", Level.ERROR);
43
44 /** The key of the loglevel. */
45 private String key;
46
47 /** The log4j loglevel. */
48 private Level log4jLevel;
49
50 /** The logger. */
51 private static Log log = LogFactory.getLog(Loglevel.class);
52
53 /**
54 * Constructor.
55 *
56 * @param key the key, not null.
57 */
58 private Loglevel(String key, Level log4jLevel)
59 {
60 this.key = key;
61 this.log4jLevel = log4jLevel;
62 }
63
64 /**
65 * Returns the key of the Loglevel.
66 *
67 * @return the key of the Loglevel, not null.
68 */
69 public String getKey()
70 {
71 return key;
72 }
73
74 /**
75 * Applies the log level.
76 */
77 public void apply()
78 {
79 if (Logger.getRootLogger().getLevel() != log4jLevel)
80 {
81 log.info("apply() : Setting loglevel to " + this);
82 Logger.getRootLogger().setLevel(log4jLevel);
83 }
84 }
85
86 /**
87 * Returns the Loglevel for a given key.
88 *
89 * @param key the key to look for.
90 *
91 * @return the corresponding Loglevel, not null.
92 *
93 * @throws IllegalArgumentException if no Loglevel can be found
94 * for the key.
95 */
96 public static Loglevel getByKey(String key)
97 {
98 for (Loglevel loglevel : values())
99 {
100 if (loglevel.getKey().equals(key))
101 {
102 return loglevel;
103 }
104 }
105 throw new IllegalArgumentException(
106 "Key " + key + " does not exist");
107 }
108
109 /**
110 * Returns the current loglevel.
111 *
112 * @return the current loglevel, or INFO if the current loglevel cannot
113 * be determined.
114 */
115 public static Loglevel getCurrentLoglevel()
116 {
117 Level level = Logger.getRootLogger().getLevel();
118 for (Loglevel loglevel : values())
119 {
120 if (loglevel.log4jLevel.equals(level))
121 {
122 return loglevel;
123 }
124 }
125 return INFO;
126 }
127 }