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/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package loggerfinder;
import java.lang.*;
import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
public class SimpleLoggerFinder extends System.LoggerFinder {
public static final CopyOnWriteArrayList<Object> LOGS = new CopyOnWriteArrayList<>();
static {
try {
long sleep = new Random().nextLong(1000L) + 1L;
// simulate a slow load service
Thread.sleep(sleep);
System.getLogger("dummy")
.log(System.Logger.Level.INFO,
"Logger finder service load sleep value: " + sleep);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
private final Map<String, SimpleLogger> loggers = new ConcurrentHashMap<>();
public SimpleLoggerFinder() {
System.getLogger("dummy")
.log(System.Logger.Level.INFO,
"Logger finder service created");
}
@Override
public System.Logger getLogger(String name, Module module) {
return loggers.computeIfAbsent(name, SimpleLogger::new);
}
private static class SimpleLogger implements System.Logger {
private final java.util.logging.Logger logger;
private static final class SimpleHandler extends Handler {
@Override
public void publish(LogRecord record) {
LOGS.add(record);
}
@Override public void flush() { }
@Override public void close() { }
}
public SimpleLogger(String name) {
logger = Logger.getLogger(name);
logger.addHandler(new SimpleHandler());
}
@Override
public String getName() {
return logger.getName();
}
java.util.logging.Level level(Level level) {
return switch (level) {
case ALL -> java.util.logging.Level.ALL;
case DEBUG -> java.util.logging.Level.FINE;
case TRACE -> java.util.logging.Level.FINER;
case INFO -> java.util.logging.Level.INFO;
case WARNING -> java.util.logging.Level.WARNING;
case ERROR -> java.util.logging.Level.SEVERE;
case OFF -> java.util.logging.Level.OFF;
};
}
@Override
public boolean isLoggable(Level level) {
return logger.isLoggable(level(level));
}
@Override
public void log(Level level, ResourceBundle bundle, String msg, Throwable thrown) {
var julLevel = level(level);
if (!logger.isLoggable(julLevel)) return;
if (bundle != null) {
logger.logrb(julLevel, bundle, msg, thrown);
} else {
logger.log(julLevel, msg, thrown);
}
}
@Override
public void log(Level level, ResourceBundle bundle, String format, Object... params) {
var julLevel = level(level);
if (!logger.isLoggable(julLevel)) return;
if (params == null) {
if (bundle == null) {
logger.log(julLevel, format);
} else {
logger.logrb(julLevel, bundle, format);
}
} else {
if (bundle == null) {
logger.log(julLevel, format, params);
} else {
logger.logrb(julLevel, bundle, format, params);
}
}
}
}
}
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