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1 /*
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2 * @(#)TN5250jLogFactory.java
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3 * @author Kenneth J. Pouncey
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4 *
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5 * Copyright: Copyright (c) 2001, 2002, 2003
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6 *
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7 * This program is free software; you can redistribute it and/or modify
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8 * it under the terms of the GNU General Public License as published by
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9 * the Free Software Foundation; either version 2, or (at your option)
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10 * any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 * GNU General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU General Public License
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18 * along with this software; see the file COPYING. If not, write to
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19 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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20 * Boston, MA 02111-1307 USA
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21 *
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22 */
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23 package org.tn5250j.tools.logging;
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24
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25 import java.util.*;
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26
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27 import org.tn5250j.tools.logging.TN5250jLogger;
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28 import org.tn5250j.interfaces.ConfigureFactory;
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29
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30 /**
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31 * An interface defining objects that can create Configure
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32 * instances.
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33 *
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34 * The model for the HashMap implementation of loggers came from the POI project
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35 * thanks to Nicola Ken Barozzi (nicolaken at apache.org) for the reference.
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36 *
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37 */
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38 public final class TN5250jLogFactory {
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39
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40 // map of TN5250jLogger instances, with classes as keys
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41 private static Map<String, TN5250jLogger> _loggers = new HashMap<String, TN5250jLogger>();
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42 private static boolean log4j;
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43 private static String customLogger;
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44 private static int level = TN5250jLogger.INFO;
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45
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46 /**
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47 * Here we try to do a little more work up front.
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48 */
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49 static {
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50
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51 try {
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52 Properties props =
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53 ConfigureFactory.getInstance().getProperties(
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54 ConfigureFactory.SESSIONS);
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55
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56
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57 level = Integer.parseInt(props.getProperty("emul.logLevel",
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58 Integer.toString(TN5250jLogger.INFO)));
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59
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60 String customLogger = System.getProperty(TN5250jLogFactory.class.getName());
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61 if (customLogger == null) {
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62 try {
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63 Class.forName("org.apache.log4j.Logger");
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64 log4j = true;
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65 }
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66 catch (Exception ignore) { ; }
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67 }
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68
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69 }
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70 catch (Exception ignore) { ; }
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71
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72 }
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73
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74 /**
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75 * Set package access only so we have to use getLogger() to return a logger object.
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76 */
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77 TN5250jLogFactory() {
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78
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79 }
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80
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81 /**
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82 * @return An instance of the TN5250jLogger.
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83 */
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84 public static TN5250jLogger getLogger (Class<?> clazz) {
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85 return getLogger(clazz.getName());
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86 }
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87
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88 /**
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89 * @return An instance of the TN5250jLogger.
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90 */
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91 public static TN5250jLogger getLogger (String clazzName) {
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92 TN5250jLogger logger = null;
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93
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94 if (_loggers.containsKey(clazzName)) {
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95 logger = _loggers.get(clazzName);
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96 } else {
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97
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98 if (customLogger != null) {
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99 try {
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100
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101 Class<?> classObject = Class.forName(customLogger);
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102 Object object = classObject.newInstance();
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103 if (object instanceof TN5250jLogger) {
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104 logger = (TN5250jLogger) object;
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105 }
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106 }
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107 catch (Exception ex) { ; }
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108 } else {
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109 if (log4j) {
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110 logger = new Log4jLogger();
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111 } else {
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112 // take the default logger.
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113 logger = new ConsoleLogger();
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114 }
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115 logger.initialize(clazzName);
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116 logger.setLevel(level);
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117 _loggers.put(clazzName, logger);
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118 }
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119 }
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120
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121 return logger;
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122 }
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123
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124 public static boolean isLog4j() {
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125 return log4j;
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126 }
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127
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128 public static void setLogLevels(int newLevel) {
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129
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130 if (level != newLevel) {
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131 level = newLevel;
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132 TN5250jLogger logger = null;
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133 Set<String> loggerSet = _loggers.keySet();
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134 Iterator<String> loggerIterator = loggerSet.iterator();
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135 while (loggerIterator.hasNext()) {
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136 logger = _loggers.get(loggerIterator.next());
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137 logger.setLevel(newLevel);
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138 }
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139 }
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140
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141 }
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142
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143 } |
