public void initialize() {
super.initialize();
log4JProperties = new Properties();
Map configuredAppenders = new HashMap();
if (appenders == null || appenders.size() == 0) {
if (defaultAppender != null) {
throw new IllegalArgumentException(
"A default appender cant be specified without any appenders configured.");
}
defaultAppender = "anonymous";
log4JProperties.setProperty("log4j.appender.anonymous", "org.apache.log4j.ConsoleAppender");
log4JProperties.setProperty("log4j.appender.anonymous.threshold", getThresholdAsString());
log4JProperties.setProperty(
"log4j.appender.anonymous.layout", "org.apache.log4j.PatternLayout");
log4JProperties.setProperty(
"log4j.appender.anonymous.layout.conversionPattern", "%-4r [%t] %-5p %c %x - %m%n");
} else {
for (int i = 0; i < appenders.size(); i++) {
Appender appender = (Appender) appenders.get(i);
String id = appender.getId();
if (configuredAppenders.containsKey(id)) {
throw new IllegalArgumentException(
"There already exists a appender with the id '" + id + "'.");
}
if (id == null) {
throw new IllegalArgumentException("The appender must have a id.");
}
if (appender.getThreshold() == null) {
appender.setThreshold(getThresholdAsString());
}
if (appender.getConversionPattern() == null) {
throw new IllegalArgumentException("The appender must have a conversion pattern.");
}
if (appender.getType() == null) {
throw new IllegalArgumentException("The appender must have a type.");
}
try {
Class.forName(appender.getType());
} catch (ClassNotFoundException ex) {
throw new IllegalArgumentException(
"Could not find the appender class: " + appender.getType(), ex);
} catch (LinkageError ex) {
throw new IllegalArgumentException(
"Could load the appender class: " + appender.getType(), ex);
}
String base = "log4j.appender." + id;
log4JProperties.setProperty(base, appender.getType());
log4JProperties.setProperty(base + ".threshold", appender.getThreshold());
log4JProperties.setProperty(base + ".layout", "org.apache.log4j.PatternLayout");
log4JProperties.setProperty(
base + ".layout.conversionPattern", appender.getConversionPattern());
Enumeration e = appender.getProperties().keys();
while (e.hasMoreElements()) {
String key = e.nextElement().toString();
log4JProperties.setProperty(base + "." + key, appender.getProperty(key));
if ("file".equals(key)) {
File logFile = new File(appender.getProperty(key));
File logDir = logFile.getParentFile();
if (!logDir.exists()) {
logDir.mkdirs();
}
}
}
configuredAppenders.put(id, appender);
}
if (defaultAppender == null) {
if (configuredAppenders.size() == 1) {
defaultAppender = ((Appender) appenders.get(0)).getId();
} else {
throw new IllegalArgumentException(
"A default appender must be specified when having several appenders.");
}
} else {
StringTokenizer tokenizer = new StringTokenizer(defaultAppender, ",");
while (tokenizer.hasMoreTokens()) {
String appender = tokenizer.nextToken();
if (!configuredAppenders.containsKey(appender)) {
throw new IllegalArgumentException(
"Could not find the default appender: '" + defaultAppender + "'.");
}
}
}
}
if (levels != null && levels.size() > 0) {
for (Iterator it = levels.iterator(); it.hasNext(); ) {
Level level = (Level) it.next();
log4JProperties.put("log4j.logger." + level.getHierarchy(), level.getLevel());
}
}
if (getThresholdAsString() == null) {
throw new IllegalArgumentException("INTERNAL ERROR: The threshold must be set.");
}
if (defaultAppender == null) {
throw new IllegalArgumentException("INTERNAL ERROR: The default appender must be set.");
}
log4JProperties.setProperty("log4j.rootLogger", getThresholdAsString() + "," + defaultAppender);
}
