в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:44:12Z

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== Level.ALL ==



<source lang="java">

import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import java.util.logging.StreamHandler;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String args[]) {
Logger log = Logger.getAnonymousLogger();
setLoggerhandler(log);
log.finest(new Exception().toString());
}
public static void setLoggerhandler(Logger logger) {
Handler handler = new ExceptionHandler();
logger.addHandler(handler);
logger.setLevel(Level.ALL);
}
}
class ExceptionHandler extends StreamHandler {
public void publish(LogRecord record) {
String msg = record.getMessage();
int exceptionIndex = msg.indexOf("Exception");
if (exceptionIndex > -1) {
Pattern pattern = Pattern.rupile("(.*Exception.*)");
Matcher matcher = pattern.matcher(msg);
if (matcher != null && matcher.find()) {
String err = "EXCEPTION FOUND " + matcher.group(1);
System.out.println(err);
}
}
}
}

</source>



== Level.FINEST ==



<source lang="java">

import java.util.logging.Level;
import java.util.logging.Logger;
public class Main {
private static Logger
lgr = Logger.getLogger("com"),
lgr2 = Logger.getLogger("com.jexp"),
util = Logger.getLogger("com.jexp.util"),
test = Logger.getLogger("com.jexp.test"),
rand = Logger.getLogger("random");

private static void logMessages() {
lgr.info("com : info");
lgr2.info("com.abc : info");
util.info("util : info");
test.severe("test : severe");
rand.info("random : info");
}
public static void main(String[] args) {
lgr.setLevel(Level.SEVERE);
System.out.println("com level: SEVERE");
logMessages();
util.setLevel(Level.FINEST);
test.setLevel(Level.FINEST);
rand.setLevel(Level.FINEST);
System.out.println("individual loggers set to FINEST");
logMessages();
lgr.setLevel(Level.SEVERE);
System.out.println("com level: SEVERE");
logMessages();
}
}

</source>



== Level.SEVERE ==



<source lang="java">

import java.util.logging.Level;
import java.util.logging.Logger;
public class Main {
private static Logger
lgr = Logger.getLogger("com"),
lgr2 = Logger.getLogger("com.jexp"),
util = Logger.getLogger("com.jexp.util"),
test = Logger.getLogger("com.jexp.test"),
rand = Logger.getLogger("random");

private static void logMessages() {
lgr.info("com : info");
lgr2.info("com.abc : info");
util.info("util : info");
test.severe("test : severe");
rand.info("random : info");
}
public static void main(String[] args) {
lgr.setLevel(Level.SEVERE);
System.out.println("com level: SEVERE");
logMessages();
util.setLevel(Level.FINEST);
test.setLevel(Level.FINEST);
rand.setLevel(Level.FINEST);
System.out.println("individual loggers set to FINEST");
logMessages();
lgr.setLevel(Level.SEVERE);
System.out.println("com level: SEVERE");
logMessages();
}
}

</source>



== Level.WARNING ==



<source lang="java">

// : c15:SimpleFilter.java
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
import java.util.logging.Filter;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
public class SimpleFilter {
private static Logger logger = Logger.getLogger("SimpleFilter");
static class Duck {
};
static class Wombat {
};
static void sendLogMessages() {
logger.log(Level.WARNING, "A duck in the house!", new Duck());
logger.log(Level.WARNING, "A Wombat at large!", new Wombat());
}
public static void main(String[] args) {
sendLogMessages();
logger.setFilter(new Filter() {
public boolean isLoggable(LogRecord record) {
Object[] params = record.getParameters();
if (params == null)
return true; // No parameters
if (record.getParameters()[0] instanceof Duck)
return true; // Only log Ducks
return false;
}
});
logger.info("After setting filter..");
sendLogMessages();
}
} ///:~

</source>

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