src/charactermanaj/util/ApplicationLoggerConfigurator.java

   1 package charactermanaj.util;\r
   2 \r
   3 import java.io.File;\r
   4 import java.io.FileInputStream;\r
   5 import java.io.FileOutputStream;\r
   6 import java.io.InputStream;\r
   7 import java.util.logging.ConsoleHandler;\r
   8 import java.util.logging.Level;\r
   9 import java.util.logging.LogManager;\r
  10 import java.util.logging.Logger;\r
  11 \r
  12 \r
  13 public final class ApplicationLoggerConfigurator {\r
  14 \r
  15         private static final String LOGGING_PROPERTIES = "logging.properties";\r
  16         \r
  17         private ApplicationLoggerConfigurator() {\r
  18                 super();\r
  19         }\r
  20 \r
  21         public static void configure() {\r
  22                 // ログマネージャ.\r
  23                 // 初期時にJRE等にある初期設定がなされている.\r
  24                 LogManager logManager = LogManager.getLogManager();\r
  25 \r
  26                 // 設定を一旦クリアする.\r
  27                 // ルートロガーがInfoになり、ハンドラはすべてリセット。ルートロガー以外の設定は空にされる.\r
  28                 logManager.reset();\r
  29 \r
  30                 Exception configurationError = null;\r
  31                 try {\r
  32                         // ユーザーごとのアプリケーション設定ディレクトリ上の設定ファイルを取得する.\r
  33                         File appDataDir = ConfigurationDirUtilities.getUserDataDir();\r
  34                         File logConfig = new File(appDataDir, LOGGING_PROPERTIES);\r
  35 \r
  36                         if ( !logConfig.exists()) {\r
  37                                 // ユーザ指定のロギングプロパティがない場合、リソースからコピーする\r
  38                                 copyDefaultLogProperty(logConfig);\r
  39                         }\r
  40                         \r
  41                         InputStream is = null;\r
  42                         if (logConfig.exists()) {\r
  43                                 // ユーザー指定のロギングプロパティがある場合\r
  44                                 is = new FileInputStream(logConfig);\r
  45                         } else {\r
  46                                 // リソース上のロギングプロパティ\r
  47                                 is = ApplicationLoggerConfigurator.class.getResourceAsStream("/" + LOGGING_PROPERTIES);\r
  48                         }\r
  49                         if (is != null) {\r
  50                                 try {\r
  51                                         // ログを再設定する.\r
  52                                         logManager.readConfiguration(is);\r
  53 \r
  54                                 } finally {\r
  55                                         is.close();\r
  56                                 }\r
  57                         }\r
  58 \r
  59                 } catch (Exception ex) {\r
  60                         // 初期化に失敗した場合はログに記録するために例外を保存するが、\r
  61                         // 処理は継続する.\r
  62                         configurationError = ex;\r
  63                 }\r
  64                 \r
  65                 // ロガーを取得\r
  66                 Logger logger = Logger.getLogger(ApplicationLoggerConfigurator.class.getName());\r
  67                 \r
  68                 // 初期化時に失敗した場合、デフォルトのコンソールハンドラを設定し、ログに出力する.\r
  69                 if (configurationError != null) {\r
  70                         logger.addHandler(new ConsoleHandler());\r
  71                         logger.addHandler(new ApplicationLogHandler());\r
  72                         logger.log(Level.WARNING, "LogConfigurationFailed", configurationError);\r
  73                 }\r
  74                 \r
  75                 // 初期化時のログ\r
  76                 logger.info("open logger.");\r
  77                 logger.info("application configuration: baseDir="\r
  78                                 + ConfigurationDirUtilities.getApplicationBaseDir() + "  appData="\r
  79                                 + ConfigurationDirUtilities.getUserDataDir());\r
  80         }\r
  81         \r
  82         /**\r
  83          * デフォルトのログプロパティをユーザディレクトリにコピーする.\r
  84          * @param logConfig ユーザディレクトリ上のログプロパティファイル位置\r
  85          */\r
  86         private static void copyDefaultLogProperty(File logConfig) {\r
  87                 try {\r
  88                         InputStream is = ApplicationLoggerConfigurator.class\r
  89                                 .getResourceAsStream("/" + LOGGING_PROPERTIES);\r
  90                         if (is != null) {\r
  91                                 try {\r
  92                                         FileOutputStream fos = new FileOutputStream(logConfig);\r
  93                                         try {\r
  94                                                 byte buf[] = new byte[4096];\r
  95                                                 for (;;) {\r
  96                                                         int rd = is.read(buf);\r
  97                                                         if (rd <= 0) {\r
  98                                                                 break;\r
  99                                                         }\r
 100                                                         fos.write(buf, 0, rd);\r
 101                                                 }\r
 102                                         } finally {\r
 103                                                 fos.close();\r
 104                                         }\r
 105                                 } finally {\r
 106                                         is.close();\r
 107                                 }\r
 108                         }\r
 109 \r
 110                 } catch (Exception ex) {\r
 111                         ex.printStackTrace();\r
 112                         // 失敗しても継続する\r
 113                 }\r
 114         }\r
 115 }\r