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Posted to commits@harmony.apache.org by te...@apache.org on 2006/05/31 23:58:27 UTC
svn commit: r410681 -
/incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java
Author: tellison
Date: Wed May 31 14:58:27 2006
New Revision: 410681
URL: http://svn.apache.org/viewvc?rev=410681&view=rev
Log:
Code tidy-up and formatting.
Modified:
incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java
Modified: incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java
URL: http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java?rev=410681&r1=410680&r2=410681&view=diff
==============================================================================
--- incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java (original)
+++ incubator/harmony/enhanced/classlib/trunk/modules/logging/src/main/java/java/util/logging/LogManager.java Wed May 31 14:58:27 2006
@@ -1,4 +1,4 @@
-/* Copyright 2004 The Apache Software Foundation or its licensors, as applicable
+/* Copyright 2004, 2006 The Apache Software Foundation or its licensors, as applicable
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -11,26 +11,25 @@
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
- */
-
-
-package java.util.logging;
-
-import java.beans.PropertyChangeListener;
-import java.beans.PropertyChangeSupport;
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-import java.util.Enumeration;
-import java.util.Hashtable;
-import java.util.Iterator;
-import java.util.Properties;
-import java.util.StringTokenizer;
-
+ */
+
+package java.util.logging;
+
+import java.beans.PropertyChangeListener;
+import java.beans.PropertyChangeSupport;
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Properties;
+import java.util.StringTokenizer;
+
/**
* <code>LogManager</code> is used to maintain configuration properties of the
* logging framework, and to manage a hierarchical namespace of all named
@@ -102,7 +101,7 @@
* </p>
* <p>
* This class, together with any handler and configuration classes associated
- * with it, <b>must</b> be loaded from the system classpath when
+ * with it, <b>must</b> be loaded from the system classpath when
* <code>LogManager</code> configuration occurs.
* </p>
* <p>
@@ -127,472 +126,475 @@
* All methods on this type can be taken as being thread safe.
* </p>
*
- */
-public class LogManager {
- /*
- * -------------------------------------------------------------------
- * Class variables
- * -------------------------------------------------------------------
- */
-
- // The line separator of the underlying OS
- // Use privileged code to read the line.separator system property
- private static final String lineSeparator = getPrivilegedSystemProperty("line.separator"); //$NON-NLS-1$
-
- // The file separator of the underlying OS
- private static final String fileSeparator = File.separator;
-
- // The shared logging permission
- private static final LoggingPermission perm = new LoggingPermission(
- "control", null); //$NON-NLS-1$
-
- //the singleton instance
- private static LogManager manager;
-
- /*
- * -------------------------------------------------------------------
- * Instance variables
- * -------------------------------------------------------------------
- */
- private Hashtable<String, Logger> loggers;
-
- private Logger root;
-
- //the configuration properties
- private Properties props = null;
-
- //the property change listener
- private PropertyChangeSupport listeners = null;
-
- /*
- * -------------------------------------------------------------------
- * Global initialization
- * -------------------------------------------------------------------
- */
-
- static {
- //init LogManager singleton instance
- String className = getPrivilegedSystemProperty("java.util.logging.manager"); //$NON-NLS-1$
- if (null != className) {
- manager = (LogManager) getInstanceByClass(className);
- }
- if (null == manager) {
- manager = new LogManager();
- }
- //init root logger
- manager.root = new Logger("", null); //$NON-NLS-1$
- manager.loggers.put("", manager.root); //$NON-NLS-1$
- //read configuration
- try {
- manager.readConfigurationImpl();
- } catch (Exception e) {
- e.printStackTrace();
- }
- //if global logger has been inited, set root as its parent
- if (null != Logger.global) {
- Logger.global.setParent(manager.root);
- }
- }
-
- /*
- * -------------------------------------------------------------------
- * Constructor
- * -------------------------------------------------------------------
- */
- /**
- *
- * Default constructor. This is not public because there should be only one
- * <code>LogManager</code> instance, which can be get by
- * <code>LogManager.getLogManager(</code>. This is protected so that application
- * can subclass the object.
- */
- protected LogManager() {
- loggers = new Hashtable<String, Logger>();
- props = new Properties();
- listeners = new PropertyChangeSupport(this);
- //add shutdown hook to ensure that the associated resource will be freed when JVM exits
- AccessController.doPrivileged(new PrivilegedAction<Object>() {
- public Object run() {
- Runtime.getRuntime().addShutdownHook(new Thread() {
- public void run() {
- reset();
- }
- });
- return null;
- }
- });
- }
-
- /*
- * -------------------------------------------------------------------
- * Methods
- * -------------------------------------------------------------------
- */
- /*
- * Package private utilities
- * Returns the line separator of the underlying OS.
- */
- static String getSystemLineSeparator() {
- return lineSeparator;
- }
-
- /**
- * Check that the caller has <code>LoggingPermission("control")</code> so
- * that it is trusted to modify the configuration for logging framework.
- * If the check passes, just return, otherwise <code>SecurityException</code>
- * will be throwed.
- *
- * @throws SecurityException
- * if there is a security manager in operation and the
- * invoker of this method does not have the required security
- * permission <code>LoggingPermission("control")</code>
- */
- public void checkAccess() {
- if (null != System.getSecurityManager()) {
- System.getSecurityManager().checkPermission(perm);
- }
- }
-
- /**
- * Add a given logger into the hierarchical namespace. The
- * <code>Logger.addLogger()</code> factory methods call this method to add
- * newly created Logger. This returns false if a logger with the given name
- * has existed in the namespace
- * <p>
- * Note that the <code>LogManager</code> may only retain weak references
- * to registered loggers. In order to prevent <code>Logger</code> objects
- * from being unexpectedly garbage collected it is necessary for
- * <i>applications</i> to maintain references to them.
- * </p>
- *
- * @param logger
- * the logger to be added
- * @return true if the given logger is added into the namespace
- * successfully, false if the logger of given name has existed in
- * the namespace
- */
- public synchronized boolean addLogger(Logger logger) {
- String name = logger.getName();
- if (null != loggers.get(name)) {
- return false;
- }
- addToFamilyTree(logger, name);
- loggers.put(name, logger);
- if (name.length() == 0) {
- root = logger;
- }
- 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);
- if ((parent = (Logger) loggers.get(parentName)) != null) {
- logger.setParent(parent);
- break;
- }
- }
- if (parent==null && parent != root) {
- parent = root;
- logger.setParent(parent);
- }
-
- //find children
- Logger[] values = (Logger[]) loggers.values().toArray(new Logger[0]);
- for (int i = 0; i < values.length; i++) {
- Logger child = values[i];
- Logger oldParent = child.getParent();
- if (parent == oldParent && (name.length() == 0 || child.getName().startsWith(name+'.'))) {
- child.setParent(logger);
- }
- }
- }
-
- /**
- * Get the logger with the given name
- *
- * @param name name of logger
- * @return logger with given name, or null if nothing is found
- */
- public synchronized Logger getLogger(String name) {
- return (Logger) loggers.get(name);
- }
-
- /**
- * Get a <code>Enumeration</code> of all registered logger names
- *
- * @return enumeration of registered logger names
- */
- public synchronized Enumeration<String> getLoggerNames() {
- return loggers.keys();
- }
-
- /**
- * Get the global <code>LogManager</code> instance
- *
- * @return the global <code>LogManager</code> instance
- */
- public static LogManager getLogManager() {
- return manager;
- }
-
- /**
- * Get the value of property with given name
- *
- * @param name the name of property
- * @return the value of property
- */
- public synchronized String getProperty(String name) {
- return props.getProperty(name);
- }
-
- /**
- * Reinitialize the properties and configuration. The initialization process
- * is same as the <code>LogManager</code> instantiation.
- * <p>
- * A <code>PropertyChangeEvent</code> must be fired.
- * </p>
- * @throws IOException
- * if any IO related problems happened
- * @throws SecurityException
- * if security manager exists and it determines that caller
- * does not have the required permissions to perform this
- * action
- */
- public void readConfiguration() throws IOException {
- readConfigurationImpl();
- }
-
- //use privilege code to get system property
- static String getPrivilegedSystemProperty(final String key) {
- return AccessController.doPrivileged(new PrivilegedAction<String>() {
- public String run() {
- return System.getProperty(key);
- }
- });
- }
-
- //get system property
- static String getSystemProperty(final String key) {
- return System.getProperty(key);
- }
-
- //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) {
- System.err
- .println("Cannot get instance for class name:" + className); //$NON-NLS-1$
- System.err.println("Caused by " + e.toString()); //$NON-NLS-1$
- return null;
- }
-
- }
-
- //actual default initilization process
- private synchronized void readConfigurationImpl() throws IOException {
- checkAccess();
- boolean needInit = true;
-
- //check config class
- String configClassName = getSystemProperty("java.util.logging.config.class"); //$NON-NLS-1$
- if (null != configClassName) {
- if (null == getInstanceByClass(configClassName))
- throw new RuntimeException("Cannot instantiate " //$NON-NLS-1$
- + configClassName);
- needInit = false;
- }
- //if config class failed, check config file
- if (needInit) {
- String configFile = getSystemProperty("java.util.logging.config.file"); //$NON-NLS-1$
- if (null == configFile) {
- //if cannot find configFile, use default logging.properties
- configFile = new StringBuffer().append(
- System.getProperty("java.home")).append(fileSeparator) //$NON-NLS-1$
- .append("lib").append(fileSeparator).append( //$NON-NLS-1$
- "logging.properties").toString(); //$NON-NLS-1$
- }
- InputStream input = null;
- try {
- input = new BufferedInputStream(new FileInputStream(configFile));
- readConfigurationImpl(input);
- } finally {
- try {
- input.close();
- } catch (Exception e) {//ignore
- }
- }
- }
- }
-
- //actual initialization process from a given input stream
- private synchronized void readConfigurationImpl(InputStream ins)
- throws IOException {
- reset();
- props.load(ins);
-
- //configs
- parseConfigProp();
-
- //handlers
- parseHandlerProp();
-
- //set levels for logger
- initLevelForLoggers();
- listeners.firePropertyChange(null, null, null);
- }
-
- //init "level" properties for all registered loggers
- private void initLevelForLoggers() {
- Enumeration enumeration = props.propertyNames();
- while (enumeration.hasMoreElements()) {
- //search for all properties whose name is ended with ".level"
- String loggerLevel = (String) enumeration.nextElement();
- if (!loggerLevel.endsWith(".level")) { //$NON-NLS-1$
- continue;
- }
- //if find such properties, search for relevant registered logger
- String loggerName = loggerLevel.substring(0,
- loggerLevel.length() - 6);
- Logger l = (Logger) loggers.get(loggerName);
- if (null == l) {
- continue;
- }
- //if find relevant registered logger, set level for it
- String levelName = props.getProperty(loggerLevel);
- Level level = Level.parse(levelName);
- if (null == level) {
- continue;
- }
- l.setLevel(level);
- }
- }
-
- //parse "handlers" property and apply setting
- private void parseHandlerProp() {
- // Logger rootLogger = root.getLogger();
- String handlers = props.getProperty("handlers"); //$NON-NLS-1$
- if (null == root || null == handlers) {
- return;
- }
- StringTokenizer st = new StringTokenizer(handlers, " "); //$NON-NLS-1$
- while (st.hasMoreTokens()) {
- String handlerName = st.nextToken();
- Handler handler = (Handler) getInstanceByClass(handlerName);
- root.addHandler(handler);
- String level = props.getProperty(handlerName + ".level"); //$NON-NLS-1$
- if (null != level) {
- handler.setLevel(Level.parse(level));
- }
- }
- }
-
- //parse property "config" and apply setting
- private void parseConfigProp() {
- String configs = props.getProperty("config"); //$NON-NLS-1$
- if (null != configs) {
- StringTokenizer st = new StringTokenizer(configs, " "); //$NON-NLS-1$
- while (st.hasMoreTokens()) {
- String configerName = st.nextToken();
- getInstanceByClass(configerName);
- }
- }
- }
-
- /**
- * Reinitialize the properties and configuration from the given
- * <code>InputStream</code>
- * <p>
- * A <code>PropertyChangeEvent</code> must be fired.
- * </p>
- *
- * @param ins the input stream.
- * @throws IOException
- * if any IO related problems happened
- * @throws SecurityException
- * if security manager exists and it determines that caller
- * does not have the required permissions to perform this
- * action
- */
- public void readConfiguration(InputStream ins) throws IOException {
- checkAccess();
- readConfigurationImpl(ins);
- }
-
- /**
- * Reset configuration.
- * <p>
- * All handlers are closed and removed from any named loggers. All loggers'
- * level is set to null, except the root logger's level is set to
- * <code>Level.INFO</code>.
- * </p>
- *
- * @throws SecurityException
- * if security manager exists and it determines that caller
- * does not have the required permissions to perform this
- * action
- */
- public void reset() {
- checkAccess();
- synchronized (this) {
- props.clear();
- Iterator it = loggers.values().iterator();
- while (it.hasNext()) {
- Logger l = (Logger) it.next();
- l.setLevel(null);
- Handler[] handlers = l.getHandlers();
- for (int i = 0; i < handlers.length; i++) {
- l.removeHandler(handlers[i]);
- //close all handlers, when unknown exceptions happen, ignore them and go on
- try {
- handlers[i].close();
- } catch (Exception e) {
- // Ignored.
- }
- }
- }
- if (null != root) {
- root.setLevel(Level.INFO);
- }
- }
- }
-
- /**
- * Add a <code>PropertyChangeListener</code>, which will be invoked when
- * the properties are reread.
- *
- * @param l the <code>PropertyChangeListener</code> to be added
- * @throws SecurityException
- * if security manager exists and it determines that caller
- * does not have the required permissions to perform this
- * action
- */
- public void addPropertyChangeListener(PropertyChangeListener l) {
- checkAccess();
- listeners.addPropertyChangeListener(l);
- }
-
- /**
- * Remove a <code>PropertyChangeListener</code>, do nothing if the given
- * listener is not found.
- *
- * @param l the <code>PropertyChangeListener</code> to be removed
- * @throws SecurityException
- * if security manager exists and it determines that caller
- * does not have the required permissions to perform this
- * action
- */
- public void removePropertyChangeListener(PropertyChangeListener l) {
- checkAccess();
- listeners.removePropertyChangeListener(l);
- }
-}
-
-
+ */
+public class LogManager {
+ /*
+ * -------------------------------------------------------------------
+ * Class variables
+ * -------------------------------------------------------------------
+ */
+
+ // The line separator of the underlying OS
+ // Use privileged code to read the line.separator system property
+ private static final String lineSeparator = getPrivilegedSystemProperty("line.separator"); //$NON-NLS-1$
+
+ // The file separator of the underlying OS
+ private static final String fileSeparator = File.separator;
+
+ // The shared logging permission
+ private static final LoggingPermission perm = new LoggingPermission(
+ "control", null); //$NON-NLS-1$
+
+ // the singleton instance
+ private static LogManager manager;
+
+ /*
+ * -------------------------------------------------------------------
+ * Instance variables
+ * -------------------------------------------------------------------
+ */
+ private Hashtable<String, Logger> loggers;
+
+ private Logger root;
+
+ // the configuration properties
+ private Properties props = null;
+
+ // the property change listener
+ private PropertyChangeSupport listeners = null;
+
+ /*
+ * -------------------------------------------------------------------
+ * Global initialization
+ * -------------------------------------------------------------------
+ */
+
+ static {
+ // init LogManager singleton instance
+ String className = getPrivilegedSystemProperty("java.util.logging.manager"); //$NON-NLS-1$
+ if (null != className) {
+ manager = (LogManager) getInstanceByClass(className);
+ }
+ if (null == manager) {
+ manager = new LogManager();
+ }
+ // init root logger
+ manager.root = new Logger("", null); //$NON-NLS-1$
+ manager.loggers.put("", manager.root); //$NON-NLS-1$
+ // read configuration
+ try {
+ manager.readConfigurationImpl();
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ // if global logger has been inited, set root as its parent
+ if (null != Logger.global) {
+ Logger.global.setParent(manager.root);
+ }
+ }
+
+ /*
+ * -------------------------------------------------------------------
+ * Constructor
+ * -------------------------------------------------------------------
+ */
+ /**
+ *
+ * Default constructor. This is not public because there should be only one
+ * <code>LogManager</code> instance, which can be get by
+ * <code>LogManager.getLogManager(</code>. This is protected so that
+ * application can subclass the object.
+ */
+ protected LogManager() {
+ loggers = new Hashtable<String, Logger>();
+ props = new Properties();
+ listeners = new PropertyChangeSupport(this);
+ // add shutdown hook to ensure that the associated resource will be
+ // freed when JVM exits
+ AccessController.doPrivileged(new PrivilegedAction<Object>() {
+ public Object run() {
+ Runtime.getRuntime().addShutdownHook(new Thread() {
+ public void run() {
+ reset();
+ }
+ });
+ return null;
+ }
+ });
+ }
+
+ /*
+ * -------------------------------------------------------------------
+ * Methods
+ * -------------------------------------------------------------------
+ */
+ /*
+ * Package private utilities Returns the line separator of the underlying
+ * OS.
+ */
+ static String getSystemLineSeparator() {
+ return lineSeparator;
+ }
+
+ /**
+ * Check that the caller has <code>LoggingPermission("control")</code> so
+ * that it is trusted to modify the configuration for logging framework. If
+ * the check passes, just return, otherwise <code>SecurityException</code>
+ * will be throwed.
+ *
+ * @throws SecurityException
+ * if there is a security manager in operation and the invoker
+ * of this method does not have the required security permission
+ * <code>LoggingPermission("control")</code>
+ */
+ public void checkAccess() {
+ if (null != System.getSecurityManager()) {
+ System.getSecurityManager().checkPermission(perm);
+ }
+ }
+
+ /**
+ * Add a given logger into the hierarchical namespace. The
+ * <code>Logger.addLogger()</code> factory methods call this method to add
+ * newly created Logger. This returns false if a logger with the given name
+ * has existed in the namespace
+ * <p>
+ * Note that the <code>LogManager</code> may only retain weak references
+ * to registered loggers. In order to prevent <code>Logger</code> objects
+ * from being unexpectedly garbage collected it is necessary for
+ * <i>applications</i> to maintain references to them.
+ * </p>
+ *
+ * @param logger
+ * the logger to be added
+ * @return true if the given logger is added into the namespace
+ * successfully, false if the logger of given name has existed in
+ * the namespace
+ */
+ public synchronized boolean addLogger(Logger logger) {
+ String name = logger.getName();
+ if (null != loggers.get(name)) {
+ return false;
+ }
+ addToFamilyTree(logger, name);
+ loggers.put(name, logger);
+ if (name.length() == 0) {
+ root = logger;
+ }
+ 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);
+ if ((parent = loggers.get(parentName)) != null) {
+ logger.setParent(parent);
+ break;
+ }
+ }
+ if (parent == null && parent != root) {
+ parent = root;
+ logger.setParent(parent);
+ }
+
+ // find children
+ Logger[] values = loggers.values().toArray(new Logger[0]);
+ for (Logger child : values) {
+ Logger oldParent = child.getParent();
+ if (parent == oldParent
+ && (name.length() == 0 || child.getName().startsWith(
+ name + '.'))) {
+ child.setParent(logger);
+ }
+ }
+ }
+
+ /**
+ * Get the logger with the given name
+ *
+ * @param name
+ * name of logger
+ * @return logger with given name, or null if nothing is found
+ */
+ public synchronized Logger getLogger(String name) {
+ return loggers.get(name);
+ }
+
+ /**
+ * Get a <code>Enumeration</code> of all registered logger names
+ *
+ * @return enumeration of registered logger names
+ */
+ public synchronized Enumeration<String> getLoggerNames() {
+ return loggers.keys();
+ }
+
+ /**
+ * Get the global <code>LogManager</code> instance
+ *
+ * @return the global <code>LogManager</code> instance
+ */
+ public static LogManager getLogManager() {
+ return manager;
+ }
+
+ /**
+ * Get the value of property with given name
+ *
+ * @param name
+ * the name of property
+ * @return the value of property
+ */
+ public synchronized String getProperty(String name) {
+ return props.getProperty(name);
+ }
+
+ /**
+ * Reinitialize the properties and configuration. The initialization process
+ * is same as the <code>LogManager</code> instantiation.
+ * <p>
+ * A <code>PropertyChangeEvent</code> must be fired.
+ * </p>
+ *
+ * @throws IOException
+ * if any IO related problems happened
+ * @throws SecurityException
+ * if security manager exists and it determines that caller does
+ * not have the required permissions to perform this action
+ */
+ public void readConfiguration() throws IOException {
+ readConfigurationImpl();
+ }
+
+ // use privilege code to get system property
+ static String getPrivilegedSystemProperty(final String key) {
+ return AccessController.doPrivileged(new PrivilegedAction<String>() {
+ public String run() {
+ return System.getProperty(key);
+ }
+ });
+ }
+
+ // get system property
+ static String getSystemProperty(final String key) {
+ return System.getProperty(key);
+ }
+
+ // 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) {
+ System.err
+ .println("Cannot get instance for class name:" + className); //$NON-NLS-1$
+ System.err.println("Caused by " + e.toString()); //$NON-NLS-1$
+ return null;
+ }
+
+ }
+
+ // actual default initilization process
+ private synchronized void readConfigurationImpl() throws IOException {
+ checkAccess();
+ boolean needInit = true;
+
+ // check config class
+ String configClassName = getSystemProperty("java.util.logging.config.class"); //$NON-NLS-1$
+ if (null != configClassName) {
+ if (null == getInstanceByClass(configClassName)) {
+ throw new RuntimeException("Cannot instantiate " //$NON-NLS-1$
+ + configClassName);
+ }
+ needInit = false;
+ }
+ // if config class failed, check config file
+ if (needInit) {
+ String configFile = getSystemProperty("java.util.logging.config.file"); //$NON-NLS-1$
+ if (null == configFile) {
+ // if cannot find configFile, use default logging.properties
+ configFile = new StringBuffer().append(
+ System.getProperty("java.home")).append(fileSeparator) //$NON-NLS-1$
+ .append("lib").append(fileSeparator).append( //$NON-NLS-1$
+ "logging.properties").toString(); //$NON-NLS-1$
+ }
+ InputStream input = null;
+ try {
+ input = new BufferedInputStream(new FileInputStream(configFile));
+ readConfigurationImpl(input);
+ } finally {
+ try {
+ input.close();
+ } catch (Exception e) {// ignore
+ }
+ }
+ }
+ }
+
+ // actual initialization process from a given input stream
+ private synchronized void readConfigurationImpl(InputStream ins)
+ throws IOException {
+ reset();
+ props.load(ins);
+
+ // configs
+ parseConfigProp();
+
+ // handlers
+ parseHandlerProp();
+
+ // set levels for logger
+ initLevelForLoggers();
+ listeners.firePropertyChange(null, null, null);
+ }
+
+ // init "level" properties for all registered loggers
+ private void initLevelForLoggers() {
+ Enumeration enumeration = props.propertyNames();
+ while (enumeration.hasMoreElements()) {
+ // search for all properties whose name is ended with ".level"
+ String loggerLevel = (String) enumeration.nextElement();
+ if (!loggerLevel.endsWith(".level")) { //$NON-NLS-1$
+ continue;
+ }
+ // if find such properties, search for relevant registered logger
+ String loggerName = loggerLevel.substring(0,
+ loggerLevel.length() - 6);
+ Logger l = loggers.get(loggerName);
+ if (null == l) {
+ continue;
+ }
+ // if find relevant registered logger, set level for it
+ String levelName = props.getProperty(loggerLevel);
+ Level level = Level.parse(levelName);
+ if (null == level) {
+ continue;
+ }
+ l.setLevel(level);
+ }
+ }
+
+ // parse "handlers" property and apply setting
+ private void parseHandlerProp() {
+ // Logger rootLogger = root.getLogger();
+ String handlers = props.getProperty("handlers"); //$NON-NLS-1$
+ if (null == root || null == handlers) {
+ return;
+ }
+ StringTokenizer st = new StringTokenizer(handlers, " "); //$NON-NLS-1$
+ while (st.hasMoreTokens()) {
+ String handlerName = st.nextToken();
+ Handler handler = (Handler) getInstanceByClass(handlerName);
+ root.addHandler(handler);
+ String level = props.getProperty(handlerName + ".level"); //$NON-NLS-1$
+ if (null != level) {
+ handler.setLevel(Level.parse(level));
+ }
+ }
+ }
+
+ // parse property "config" and apply setting
+ private void parseConfigProp() {
+ String configs = props.getProperty("config"); //$NON-NLS-1$
+ if (null != configs) {
+ StringTokenizer st = new StringTokenizer(configs, " "); //$NON-NLS-1$
+ while (st.hasMoreTokens()) {
+ String configerName = st.nextToken();
+ getInstanceByClass(configerName);
+ }
+ }
+ }
+
+ /**
+ * Reinitialize the properties and configuration from the given
+ * <code>InputStream</code>
+ * <p>
+ * A <code>PropertyChangeEvent</code> must be fired.
+ * </p>
+ *
+ * @param ins
+ * the input stream.
+ * @throws IOException
+ * if any IO related problems happened
+ * @throws SecurityException
+ * if security manager exists and it determines that caller does
+ * not have the required permissions to perform this action
+ */
+ public void readConfiguration(InputStream ins) throws IOException {
+ checkAccess();
+ readConfigurationImpl(ins);
+ }
+
+ /**
+ * Reset configuration.
+ * <p>
+ * All handlers are closed and removed from any named loggers. All loggers'
+ * level is set to null, except the root logger's level is set to
+ * <code>Level.INFO</code>.
+ * </p>
+ *
+ * @throws SecurityException
+ * if security manager exists and it determines that caller does
+ * not have the required permissions to perform this action
+ */
+ public void reset() {
+ checkAccess();
+ synchronized (this) {
+ props.clear();
+ Iterator it = loggers.values().iterator();
+ while (it.hasNext()) {
+ Logger l = (Logger) it.next();
+ l.setLevel(null);
+ Handler[] handlers = l.getHandlers();
+ for (Handler element : handlers) {
+ l.removeHandler(element);
+ // close all handlers, when unknown exceptions happen,
+ // ignore them and go on
+ try {
+ element.close();
+ } catch (Exception e) {
+ // Ignored.
+ }
+ }
+ }
+ if (null != root) {
+ root.setLevel(Level.INFO);
+ }
+ }
+ }
+
+ /**
+ * Add a <code>PropertyChangeListener</code>, which will be invoked when
+ * the properties are reread.
+ *
+ * @param l
+ * the <code>PropertyChangeListener</code> to be added
+ * @throws SecurityException
+ * if security manager exists and it determines that caller does
+ * not have the required permissions to perform this action
+ */
+ public void addPropertyChangeListener(PropertyChangeListener l) {
+ checkAccess();
+ listeners.addPropertyChangeListener(l);
+ }
+
+ /**
+ * Remove a <code>PropertyChangeListener</code>, do nothing if the given
+ * listener is not found.
+ *
+ * @param l
+ * the <code>PropertyChangeListener</code> to be removed
+ * @throws SecurityException
+ * if security manager exists and it determines that caller does
+ * not have the required permissions to perform this action
+ */
+ public void removePropertyChangeListener(PropertyChangeListener l) {
+ checkAccess();
+ listeners.removePropertyChangeListener(l);
+ }
+}