/**
* Configures the Logger (log4j) class used by the entire library to log what happens at run time.
*
* @param logToConsole determines if log4j engine should log to the standard output or not.
* @return a Logger class used to log events and functional meanings of the application.
*/
public Logger configure(boolean logToConsole) {
Logger log = Logger.getLogger(clazz);
boolean loadDefaults = false;
String logPath = null;
PatternLayout layout = null;
Strings str = Strings.getOne();
String logLevel = "", logConsoleLevel = "", logFileLevel = "";
try {
Constants c = Constants.getOne(clazz);
Properties log4j = c.getLog4j();
loadDefaults = log4j.isEmpty();
if (!loadDefaults) {
PropertyConfigurator.configure(log4j);
} else {
logLevel = c.getConstant("log.level");
logConsoleLevel = c.getConstant("log.console.level");
logFileLevel = c.getConstant("log.file.level");
logPath = str.safeConcatPaths(c.getConstant("log.dir"), c.getConstant("log.file"));
if (!str.checkPathExistence(logPath)) {
str.createPath(logPath);
new File(logPath).createNewFile();
}
layout = new PatternLayout(c.getConstant("log.pattern"));
}
} catch (Throwable e) {
logPath = str.safeConcatPaths(Constants.USER_HOME, "." + Constants.FPM_DIR);
if (!str.checkPathExistence(logPath)) {
str.createPath(logPath);
}
logPath = str.safeConcatPaths(logPath, Constants.MAIN_LOG_FILE);
layout = new PatternLayout(Constants.DEFAULT_LOG_PATTERN);
loadDefaults = true;
}
if (loadDefaults) {
log.setLevel(Level.toLevel(logLevel));
if (logToConsole) {
ConsoleAppender consapp = new ConsoleAppender(layout);
consapp.setTarget("System.out");
consapp.setThreshold(Level.toLevel(logConsoleLevel));
log.addAppender(consapp);
}
FileAppender fileapp;
try {
fileapp = new FileAppender(layout, logPath);
fileapp.setThreshold(Level.toLevel(logFileLevel));
log.addAppender(fileapp);
} catch (IOException e) {
log.warn("FileAppender not initialized! ".concat(e.getMessage()));
}
}
log.trace("Logger initialized!");
return log;
}
/**
* Creates a configured appender.
*
* @param layout layout, may not be null.
* @param target target, either "System.err" or "System.out".
*/
public ConsoleAppender(Layout layout, String target) {
setLayout(layout);
setTarget(target);
activateOptions();
}