1 package com.aragost.javahg.log; 2 3 /** 4 * General interface for logging. This interface is used by each JavaHG class 5 * for logging. A implementation of the logger interface can be retrieved 6 * by {@link LoggerFactory#getLogger(java.lang.Class)}. 7 * 8 */ 9 public interface Logger { 10 11 /** 12 * Logs a debugging message - detailed debugging information that can be 13 * used for identifying problems without a debugger, e.g. entry/exit points, 14 * user errors, recoverable errors, algorithm steps. The application 15 * performance is significantly reduced when this logging level is enabled. 16 * Not for production use. 17 * 18 * @param msg 19 * The message to log. 20 */ 21 public void debug(String msg); 22 23 /** 24 * Logs a debugging message - detailed debugging information that can be 25 * used for identifying problems without a debugger, e.g. entry/exit points, 26 * user errors, recoverable errors, algorithm steps. The application 27 * performance is significantly reduced when this logging level is enabled. 28 * Not for production use. 29 * 30 * @param msg 31 * The message to log. 32 */ 33 public void debug(String msg, Object... args); 34 35 public void debug(String msg, Throwable thrown); 36 37 /** 38 * Logs an informational message - information about application progress, 39 * e.g. configuration values, service startup/shutdown. 40 * 41 * @param message 42 * The message to log. 43 */ 44 public void info(String msg); 45 46 public void info(String msg, Object... args); 47 48 public void info(String msg, Throwable thrown); 49 50 public void warn(String msg); 51 52 public void warn(String msg, Object... args); 53 54 public void warn(String msg, Throwable thrown); 55 56 public void error(String msg); 57 58 public void error(String msg, Object... args); 59 60 public void error(String msg, Throwable thrown); 61 62 public boolean isInfoEnabled(); 63 64 public boolean isDebugEnabled(); 65 66 public boolean isWarnEnabled(); 67 68 public boolean isErrorEnabled(); 69 }