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JVM AOT compiler currently generating JavaScript, C++, Haxe, with initial focus on Kotlin and games.
package java.util.logging;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.*;
import java.util.*;
public class LogManager {
private static final LoggingPermission perm = new LoggingPermission("control", null);
static LogManager manager;
public static final String LOGGING_MXBEAN_NAME = "java.util.logging:type=Logging";
public static LoggingMXBean getLoggingMXBean() {
throw new UnsupportedOperationException();
}
// FIXME: use weak reference to avoid heap memory leak
private Hashtable loggers;
private Properties props;
private PropertyChangeSupport listeners;
static {
// init LogManager singleton instance
String className = System.getProperty("java.util.logging.manager");
if (className != null) {
manager = (LogManager) getInstanceByClass(className);
}
if (manager == null) {
manager = new LogManager();
}
// read configuration
try {
manager.readConfiguration();
} catch (Exception e) {
e.printStackTrace();
}
// if global logger has been initialized, set root as its parent
Logger root = new Logger("", null);
root.setLevel(Level.INFO);
Logger.global.setParent(root);
manager.addLogger(root);
manager.addLogger(Logger.global);
}
protected LogManager() {
loggers = new Hashtable();
props = new Properties();
listeners = new PropertyChangeSupport(this);
// add shutdown hook to ensure that the associated resource will be
// freed when JVM exits
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override public void run() {
reset();
}
});
}
public void checkAccess() {
}
public synchronized boolean addLogger(Logger logger) {
String name = logger.getName();
if (loggers.get(name) != null) return false;
addToFamilyTree(logger, name);
loggers.put(name, logger);
logger.setManager(this);
return true;
}
private void addToFamilyTree(Logger logger, String name) {
Logger parent = null;
// find parent
int lastSeparator;
String parentName = name;
while ((lastSeparator = parentName.lastIndexOf('.')) != -1) {
parentName = parentName.substring(0, lastSeparator);
parent = loggers.get(parentName);
if (parent != null) {
setParent(logger, parent);
break;
} else if (getProperty(parentName + ".level") != null ||
getProperty(parentName + ".handlers") != null) {
parent = Logger.getLogger(parentName);
setParent(logger, parent);
break;
}
}
if (parent == null && (parent = loggers.get("")) != null) {
setParent(logger, parent);
}
// find children
// TODO: performance can be improved here?
String nameDot = name + '.';
Collection allLoggers = loggers.values();
for (final Logger child : allLoggers) {
Logger oldParent = child.getParent();
if (parent == oldParent && (name.length() == 0 || child.getName().startsWith(nameDot))) {
final Logger thisLogger = logger;
child.setParent(thisLogger);
if (oldParent != null) {
// -- remove from old parent as the parent has been changed
oldParent.children.remove(child);
}
}
}
}
public synchronized Logger getLogger(String name) {
return loggers.get(name);
}
public synchronized Enumeration getLoggerNames() {
return loggers.keys();
}
public static LogManager getLogManager() {
return manager;
}
public String getProperty(String name) {
return props.getProperty(name);
}
public void readConfiguration() throws IOException {
// check config class
String configClassName = System.getProperty("java.util.logging.config.class");
if (configClassName == null || getInstanceByClass(configClassName) == null) {
// if config class failed, check config file
String configFile = System.getProperty("java.util.logging.config.file");
if (configFile == null) {
// if cannot find configFile, use default logging.properties
configFile = System.getProperty("java.home") + File.separator + "lib" + File.separator + "logging.properties";
}
InputStream input = null;
try {
try {
input = new FileInputStream(configFile);
} catch (IOException exception) {
// fall back to using the built-in logging.properties file
input = LogManager.class.getResourceAsStream("logging.properties");
if (input == null) {
throw exception;
}
}
readConfiguration(new BufferedInputStream(input));
} finally {
input.close();
}
}
}
// use SystemClassLoader to load class from system classpath
static Object getInstanceByClass(final String className) {
try {
Class clazz = ClassLoader.getSystemClassLoader().loadClass(className);
return clazz.newInstance();
} catch (Exception e) {
try {
Class clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
return clazz.newInstance();
} catch (Exception innerE) {
System.err.println("Loading class '" + className + "' failed");
System.err.println(innerE);
return null;
}
}
}
// actual initialization process from a given input stream
private synchronized void readConfigurationImpl(InputStream ins)
throws IOException {
reset();
props.load(ins);
// The RI treats the root logger as special. For compatibility, always
// update the root logger's handlers.
Logger root = loggers.get("");
if (root != null) {
root.setManager(this);
}
// parse property "config" and apply setting
String configs = props.getProperty("config");
if (configs != null) {
StringTokenizer st = new StringTokenizer(configs, " ");
while (st.hasMoreTokens()) {
String configerName = st.nextToken();
getInstanceByClass(configerName);
}
}
// set levels for logger
Collection allLoggers = loggers.values();
for (Logger logger : allLoggers) {
String property = props.getProperty(logger.getName() + ".level");
if (property != null) {
logger.setLevel(Level.parse(property));
}
}
listeners.firePropertyChange(null, null, null);
}
public void readConfiguration(InputStream ins) throws IOException {
checkAccess();
readConfigurationImpl(ins);
}
public synchronized void reset() {
checkAccess();
props = new Properties();
Enumeration names = getLoggerNames();
while (names.hasMoreElements()) {
String name = names.nextElement();
Logger logger = getLogger(name);
if (logger != null) {
logger.reset();
}
}
Logger root = loggers.get("");
if (root != null) {
root.setLevel(Level.INFO);
}
}
public void addPropertyChangeListener(PropertyChangeListener l) {
if (l == null) {
throw new NullPointerException("l == null");
}
checkAccess();
listeners.addPropertyChangeListener(l);
}
public void removePropertyChangeListener(PropertyChangeListener l) {
checkAccess();
listeners.removePropertyChangeListener(l);
}
synchronized Logger getOrCreate(String name, String resourceBundleName) {
Logger result = getLogger(name);
if (result == null) {
result = new Logger(name, resourceBundleName);
addLogger(result);
}
return result;
}
synchronized void setParent(Logger logger, Logger newParent) {
logger.parent = newParent;
if (logger.levelObjVal == null) {
setLevelRecursively(logger, null);
}
newParent.children.add(logger);
logger.updateVmLogHandler();
}
synchronized void setLevelRecursively(Logger logger, Level newLevel) {
int previous = logger.levelIntVal;
logger.levelObjVal = newLevel;
if (newLevel == null) {
logger.levelIntVal = logger.parent != null ? logger.parent.levelIntVal : Level.INFO.intValue();
} else {
logger.levelIntVal = newLevel.intValue();
}
if (previous != logger.levelIntVal) {
for (Logger child : logger.children) {
if (child.levelObjVal == null) {
setLevelRecursively(child, null);
}
}
}
}
}