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207
hrmsEjb/org/apache/commons/logging/LogFactory.java
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207
hrmsEjb/org/apache/commons/logging/LogFactory.java
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package org.apache.commons.logging;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.UnsupportedEncodingException;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Properties;
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public abstract class LogFactory {
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public static final String FACTORY_PROPERTY = "org.apache.commons.logging.LogFactory";
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public static final String FACTORY_DEFAULT = "org.apache.commons.logging.impl.LogFactoryImpl";
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public static final String FACTORY_PROPERTIES = "commons-logging.properties";
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protected static final String SERVICE_ID = "META-INF/services/org.apache.commons.logging.LogFactory";
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protected static Hashtable factories = new Hashtable();
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public static LogFactory getFactory() throws LogConfigurationException {
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ClassLoader contextClassLoader = AccessController.<ClassLoader>doPrivileged(new PrivilegedAction() {
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public Object run() {
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return LogFactory.getContextClassLoader();
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}
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});
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LogFactory factory = getCachedFactory(contextClassLoader);
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if (factory != null)
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return factory;
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Properties props = null;
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try {
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InputStream stream = getResourceAsStream(contextClassLoader, "commons-logging.properties");
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if (stream != null) {
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props = new Properties();
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props.load(stream);
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stream.close();
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}
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} catch (IOException e) {
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} catch (SecurityException e) {}
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try {
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String factoryClass = System.getProperty("org.apache.commons.logging.LogFactory");
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if (factoryClass != null)
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factory = newFactory(factoryClass, contextClassLoader);
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} catch (SecurityException e) {}
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if (factory == null)
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try {
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InputStream is = getResourceAsStream(contextClassLoader, "META-INF/services/org.apache.commons.logging.LogFactory");
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if (is != null) {
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BufferedReader bufferedReader;
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try {
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bufferedReader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
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} catch (UnsupportedEncodingException e) {
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bufferedReader = new BufferedReader(new InputStreamReader(is));
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}
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String factoryClassName = bufferedReader.readLine();
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bufferedReader.close();
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if (factoryClassName != null && !"".equals(factoryClassName))
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factory = newFactory(factoryClassName, contextClassLoader);
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}
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} catch (Exception ex) {}
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if (factory == null && props != null) {
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String factoryClass = props.getProperty("org.apache.commons.logging.LogFactory");
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if (factoryClass != null)
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factory = newFactory(factoryClass, contextClassLoader);
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}
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if (factory == null)
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factory = newFactory("org.apache.commons.logging.impl.LogFactoryImpl", LogFactory.class.getClassLoader());
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if (factory != null) {
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cacheFactory(contextClassLoader, factory);
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if (props != null) {
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Enumeration names = props.propertyNames();
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while (names.hasMoreElements()) {
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String name = (String)names.nextElement();
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String value = props.getProperty(name);
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factory.setAttribute(name, value);
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}
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}
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}
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return factory;
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}
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public static Log getLog(Class clazz) throws LogConfigurationException {
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return getFactory().getInstance(clazz);
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}
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public static Log getLog(String name) throws LogConfigurationException {
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return getFactory().getInstance(name);
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}
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public static void release(ClassLoader classLoader) {
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synchronized (factories) {
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LogFactory factory = (LogFactory)factories.get(classLoader);
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if (factory != null) {
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factory.release();
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factories.remove(classLoader);
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}
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}
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}
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public static void releaseAll() {
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synchronized (factories) {
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Enumeration elements = factories.elements();
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while (elements.hasMoreElements()) {
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LogFactory element = elements.nextElement();
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element.release();
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}
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factories.clear();
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}
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}
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protected static ClassLoader getContextClassLoader() throws LogConfigurationException {
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ClassLoader classLoader = null;
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try {
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Method method = Thread.class.getMethod("getContextClassLoader", null);
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try {
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classLoader = (ClassLoader)method.invoke(Thread.currentThread(), null);
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} catch (IllegalAccessException e) {
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throw new LogConfigurationException("Unexpected IllegalAccessException", e);
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} catch (InvocationTargetException e) {
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if (!(e.getTargetException() instanceof SecurityException))
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throw new LogConfigurationException("Unexpected InvocationTargetException", e.getTargetException());
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}
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} catch (NoSuchMethodException e) {
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classLoader = LogFactory.class.getClassLoader();
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}
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return classLoader;
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}
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private static LogFactory getCachedFactory(ClassLoader contextClassLoader) {
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LogFactory factory = null;
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if (contextClassLoader != null)
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factory = (LogFactory)factories.get(contextClassLoader);
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return factory;
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}
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private static void cacheFactory(ClassLoader classLoader, LogFactory factory) {
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if (classLoader != null && factory != null)
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factories.put(classLoader, factory);
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}
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protected static LogFactory newFactory(String factoryClass, ClassLoader classLoader) throws LogConfigurationException {
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Object result = AccessController.doPrivileged(new PrivilegedAction(classLoader, factoryClass) {
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private final ClassLoader val$classLoader;
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private final String val$factoryClass;
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public Object run() {
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try {
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if (this.val$classLoader != null)
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try {
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return this.val$classLoader.loadClass(this.val$factoryClass).newInstance();
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} catch (ClassNotFoundException ex) {
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if (this.val$classLoader == ((LogFactory.class$org$apache$commons$logging$LogFactory == null) ? (LogFactory.class$org$apache$commons$logging$LogFactory = LogFactory.class$("org.apache.commons.logging.LogFactory")) : LogFactory.class$org$apache$commons$logging$LogFactory).getClassLoader())
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throw ex;
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} catch (NoClassDefFoundError e) {
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if (this.val$classLoader == ((LogFactory.class$org$apache$commons$logging$LogFactory == null) ? (LogFactory.class$org$apache$commons$logging$LogFactory = LogFactory.class$("org.apache.commons.logging.LogFactory")) : LogFactory.class$org$apache$commons$logging$LogFactory).getClassLoader())
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throw e;
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} catch (ClassCastException e) {
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if (this.val$classLoader == ((LogFactory.class$org$apache$commons$logging$LogFactory == null) ? (LogFactory.class$org$apache$commons$logging$LogFactory = LogFactory.class$("org.apache.commons.logging.LogFactory")) : LogFactory.class$org$apache$commons$logging$LogFactory).getClassLoader())
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throw e;
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}
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return Class.forName(this.val$factoryClass).newInstance();
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} catch (Exception e) {
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return new LogConfigurationException(e);
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}
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}
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});
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if (result instanceof LogConfigurationException)
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throw (LogConfigurationException)result;
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return (LogFactory)result;
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}
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private static InputStream getResourceAsStream(ClassLoader loader, String name) {
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return AccessController.<InputStream>doPrivileged(new PrivilegedAction(loader, name) {
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private final ClassLoader val$loader;
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private final String val$name;
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public Object run() {
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if (this.val$loader != null)
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return this.val$loader.getResourceAsStream(this.val$name);
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return ClassLoader.getSystemResourceAsStream(this.val$name);
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}
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});
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}
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public abstract Object getAttribute(String paramString);
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public abstract String[] getAttributeNames();
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public abstract Log getInstance(Class paramClass) throws LogConfigurationException;
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public abstract Log getInstance(String paramString) throws LogConfigurationException;
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public abstract void release();
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public abstract void removeAttribute(String paramString);
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public abstract void setAttribute(String paramString, Object paramObject);
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}
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