Tomcat源代码学习日记(2004-09-30 11:44)
Tomcat的log
在Catalina 的start中
public void start() {
if (server == null) {
load();
}
long t1 = System.currentTimeMillis();
// Start the new server
if (server instanceof Lifecycle) {
try {
((Lifecycle) server).start();
} catch (LifecycleException e) {
log.error("Catalina.start: ", e);
}
}
long t2 = System.currentTimeMillis();
log.info("Server startup in " + (t2 - t1) + " ms");
try {
// Register shutdown hook
if (useShutdownHook) {
if (shutdownHook == null) {
shutdownHook = new CatalinaShutdownHook();
}
Runtime.getRuntime().addShutdownHook(shutdownHook);
}
} catch (Throwable t) {
// This will fail on JDK 1.2. Ignoring, as Tomcat can run
// fine without the shutdown hook.
}
if (await) {
await();
stop();
}
}
if (shutdownHook == null) {
shutdownHook = new CatalinaShutdownHook();
}
protected class CatalinaShutdownHook extends Thread {
public void run() {
if (server != null) {
Catalina.this.stop();
}
}
}
private static org.apache.commons.logging.Log log=
org.apache.commons.logging.LogFactory.getLog( Catalina.class );
}
public static Log getLog(Class clazz)
throws LogConfigurationException {
return (getFactory().getInstance(clazz));
}
public static LogFactory getFactory() throws LogConfigurationException {
ClassLoader contextClassLoader =
(ClassLoader)AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
return getContextClassLoader();
}
});
LogFactory factory = getCachedFactory(contextClassLoader);
if (factory != null)
return factory;
Properties props=null;
try {
InputStream stream = getResourceAsStream(contextClassLoader,
FACTORY_PROPERTIES);
if (stream != null) {
props = new Properties();
props.load(stream);
stream.close();
}
} catch (IOException e) {
} catch (SecurityException e) {
}
try {
String factoryClass = System.getProperty(FACTORY_PROPERTY);
if (factoryClass != null) {
factory = newFactory(factoryClass, contextClassLoader);
}
} catch (SecurityException e) {
;
}
if (factory == null) {
try {
InputStream is = getResourceAsStream(contextClassLoader,
SERVICE_ID);
if( is != null ) {
BufferedReader rd;
try {
rd = new BufferedReader(new InputStreamReader(is, "UTF-8"));
} catch (java.io.UnsupportedEncodingException e) {
rd = new BufferedReader(new InputStreamReader(is));
}
String factoryClassName = rd.readLine();
rd.close();
if (factoryClassName != null &&
! "".equals(factoryClassName)) {
factory= newFactory( factoryClassName, contextClassLoader );
}
}
} catch( Exception ex ) {
;
}
}
if (factory == null && props != null) {
String factoryClass = props.getProperty(FACTORY_PROPERTY);
if (factoryClass != null) {
factory = newFactory(factoryClass, contextClassLoader);
}
}
if (factory == null) {
factory = newFactory(FACTORY_DEFAULT, LogFactory.class.getClassLoader());
}
if (factory != null) {
cacheFactory(contextClassLoader, factory);
if( props!=null ) {
Enumeration names = props.propertyNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = props.getProperty(name);
factory.setAttribute(name, value);
}
}
}
return factory;
}
LogFactory factory = getCachedFactory(contextClassLoader);
private static LogFactory getCachedFactory(ClassLoader contextClassLoader)
{
LogFactory factory = null;
if (contextClassLoader != null)
factory = (LogFactory) factories.get(contextClassLoader);
return factory;
}
