Re: Concurrent, persistent background process for a J2EE container
Donkey Hottie wrote:
Arne Vajh?j <arne@vajhoej.dk> wrote in
news:48b83ecd$0$90267$14726298@news.sunsite.dk:
Donkey Hottie wrote:
We can't use java.util.logging for this. Boss wants "structured"
data, not flat text files.
Even java.util.logging support custom formatters and handlers.
(Log4j is better though)
Our admin/access audit logs will be written to (implementation may
vary) to a database or disk file in some structured format, and those
logs will be available in the Management Console GUI.
java.util.logging and Log4j can be customized for a task like that.
Can java.util.logging take a parameter like a own rolled Java Object, not a
String as a thing to log? or a String of xml formatted object?
Ok, maybe it can. XML string is a string. Have to think about this.. maybe
no need for a custom formatter, put the xml in, and read it out. As long as
it's on one LINE in the log it might work.
See the code below for an example of what a custom formatter can do.
If you need it written in a custom way we will also need a custom
handler.
Arne
PS: The code below is demo code - you may want to make it a bit more
robust for production.
===============================================================
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
public class CustomFormatter extends Formatter {
@Override
public String format(LogRecord record) {
return "####" + record.getMessage() + "####" +
System.getProperty("line.separator");
}
public static void setup() {
Logger log = Logger.getLogger("foobar");
while(log.getParent() != null) log = log.getParent();
log.getHandlers()[0].setFormatter(new CustomFormatter());
}
public static void main(String[] args) {
CustomFormatter.setup();
Logger logger1 = Logger.getLogger("test");
logger1.info("This is a test");
Logger logger2 = Logger.getLogger("test.test");
logger2.info("This is also a test");
}
}