| /** |
| * Logback: the reliable, generic, fast and flexible logging framework. |
| * Copyright (C) 1999-2009, QOS.ch. All rights reserved. |
| * |
| * This program and the accompanying materials are dual-licensed under |
| * either the terms of the Eclipse Public License v1.0 as published by |
| * the Eclipse Foundation |
| * |
| * or (per the licensee's choosing) |
| * |
| * under the terms of the GNU Lesser General Public License version 2.1 |
| * as published by the Free Software Foundation. |
| */ |
| package org.slf4j.impl; |
| |
| import org.slf4j.ILoggerFactory; |
| import org.slf4j.LoggerFactory; |
| import org.slf4j.helpers.Util; |
| import org.slf4j.spi.LoggerFactoryBinder; |
| |
| import ch.qos.logback.classic.LoggerContext; |
| import ch.qos.logback.classic.util.ContextInitializer; |
| import ch.qos.logback.classic.util.ContextSelectorStaticBinder; |
| import ch.qos.logback.core.CoreConstants; |
| import ch.qos.logback.core.joran.spi.JoranException; |
| import ch.qos.logback.core.util.StatusPrinter; |
| |
| /** |
| * |
| * The binding of {@link LoggerFactory} class with an actual instance of |
| * {@link ILoggerFactory} is performed using information returned by this class. |
| * |
| * @author <a href="http://www.qos.ch/shop/products/log4jManual">Ceki |
| * Gülcü</a> |
| */ |
| public class StaticLoggerBinder implements LoggerFactoryBinder { |
| |
| /** |
| * Declare the version of the SLF4J API this implementation is compiled |
| * against. The value of this field is usually modified with each release. |
| */ |
| // to avoid constant folding by the compiler, this field must *not* be final |
| public static String REQUESTED_API_VERSION = "1.6"; // !final |
| |
| final static String NULL_CS_URL = CoreConstants.CODES_URL + "#null_CS"; |
| |
| /** |
| * The unique instance of this class. |
| */ |
| private static StaticLoggerBinder SINGLETON = new StaticLoggerBinder(); |
| |
| private static Object KEY = new Object(); |
| |
| static { |
| SINGLETON.init(); |
| } |
| |
| private boolean initialized = false; |
| private LoggerContext defaultLoggerContext = new LoggerContext(); |
| private final ContextSelectorStaticBinder contextSelectorBinder = ContextSelectorStaticBinder |
| .getSingleton(); |
| |
| private StaticLoggerBinder() { |
| defaultLoggerContext.setName(CoreConstants.DEFAULT_CONTEXT_NAME); |
| } |
| |
| public static StaticLoggerBinder getSingleton() { |
| return SINGLETON; |
| } |
| |
| /** |
| * Package access for testing purposes. |
| */ |
| static void reset() { |
| SINGLETON = new StaticLoggerBinder(); |
| SINGLETON.init(); |
| } |
| |
| /** |
| * Package access for testing purposes. |
| */ |
| void init() { |
| try { |
| try { |
| new ContextInitializer(defaultLoggerContext).autoConfig(); |
| } catch (JoranException je) { |
| Util.report("Failed to auto configure default logger context", je); |
| } |
| StatusPrinter.printInCaseOfErrorsOrWarnings(defaultLoggerContext); |
| contextSelectorBinder.init(defaultLoggerContext, KEY); |
| initialized = true; |
| } catch (Throwable t) { |
| // we should never get here |
| Util.report("Failed to instantiate [" + LoggerContext.class.getName() |
| + "]", t); |
| } |
| } |
| |
| public ILoggerFactory getLoggerFactory() { |
| if (!initialized) { |
| return defaultLoggerContext; |
| } |
| |
| if (contextSelectorBinder.getContextSelector() == null) { |
| throw new IllegalStateException( |
| "contextSelector cannot be null. See also " + NULL_CS_URL); |
| } |
| return contextSelectorBinder.getContextSelector().getLoggerContext(); |
| } |
| |
| public String getLoggerFactoryClassStr() { |
| return contextSelectorBinder.getContextSelector().getClass().getName(); |
| } |
| |
| } |