Siphalor/tweed5-commons-logging
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Deal with the posiblity that a commons-logging is loaded in

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a loader, and the thread loader is set to point to a different
loader that doesn't include logging ( or to a wrong value ).

This happens when logging is used in certain container components,
where the thread loader will point to an app that may not
have/use logging.

XXX What's the right order ? From a 'feature' point of view,
it's better to try the thread loader first, so apps can
override the default. From a security point of view,
we should try the Class.forName() first, i.e. whatever
is loaded in the parent loader.

The current fix leaves the original order ( with thread loader
used if available ).


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/logging/trunk@138874 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Costin Manolache
2002-02-26 19:00:27 +00:00
parent 18a4e8fa33
commit 078804d827
2 changed files with 39 additions and 17 deletions
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24
src/java/org/apache/commons/logging/LogFactory.java
View File

@@ -1,7 +1,7 @@
/*
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//logging/src/java/org/apache/commons/logging/LogFactory.java,v 1.4 2002/02/14 21:09:19 costin Exp $
* $Revision: 1.4 $
* $Date: 2002/02/14 21:09:19 $
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//logging/src/java/org/apache/commons/logging/LogFactory.java,v 1.5 2002/02/26 19:00:27 costin Exp $
* $Revision: 1.5 $
* $Date: 2002/02/26 19:00:27 $
*
* ====================================================================
*
@@ -84,7 +84,7 @@ import java.util.Properties;
*
* @author Craig R. McClanahan
* @author Costin Manolache
* @version $Revision: 1.4 $ $Date: 2002/02/14 21:09:19 $
* @version $Revision: 1.5 $ $Date: 2002/02/26 19:00:27 $
*/
public abstract class LogFactory {
@@ -483,21 +483,29 @@ public abstract class LogFactory {
*/
protected static LogFactory newFactory(String factoryClass,
ClassLoader classLoader)
throws LogConfigurationException {
throws LogConfigurationException
{
try {
Class clazz = null;
if (classLoader == null) {
clazz = Class.forName(factoryClass);
} else {
clazz = classLoader.loadClass(factoryClass);
try {
// first the thread class loader
clazz = classLoader.loadClass(factoryClass);
} catch( ClassNotFoundException ex ) {
// if this failed ( i.e. no implementation is
// found in the webapp itself ) try the
// caller's loader
clazz = Class.forName( factoryClass );
}
}
return ((LogFactory) clazz.newInstance());
} catch (Exception e) {
e.printStackTrace();
throw new LogConfigurationException(e);
}
}
}

30
src/java/org/apache/commons/logging/impl/LogFactoryImpl.java
View File

@@ -1,7 +1,7 @@
/*
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//logging/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java,v 1.4 2002/02/15 05:42:35 costin Exp $
* $Revision: 1.4 $
* $Date: 2002/02/15 05:42:35 $
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//logging/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java,v 1.5 2002/02/26 19:00:27 costin Exp $
* $Revision: 1.5 $
* $Date: 2002/02/26 19:00:27 $
*
* ====================================================================
*
@@ -104,7 +104,7 @@ import org.apache.commons.logging.LogSource;
*
* @author Rod Waldhoff
* @author Craig R. McClanahan
* @version $Revision: 1.4 $ $Date: 2002/02/15 05:42:35 $
* @version $Revision: 1.5 $ $Date: 2002/02/26 19:00:27 $
*/
public class LogFactoryImpl extends LogFactory {
@@ -395,7 +395,7 @@ public class LogFactoryImpl extends LogFactory {
// Attempt to load the Log implementation class
Class logClass = null;
try {
logClass = findClassLoader().loadClass(logClassName);
logClass = loadClass(logClassName);
if (!Log.class.isAssignableFrom(logClass)) {
throw new LogConfigurationException
("Class " + logClassName + " does not implement Log");
@@ -423,10 +423,24 @@ public class LogFactoryImpl extends LogFactory {
}
/** Load a class, try first the thread class loader, and
if it fails use the loader that loaded this class
*/
static Class loadClass( String name )
throws ClassNotFoundException
{
ClassLoader threadCL=findClassLoader();
try {
return threadCL.loadClass(name);
} catch( ClassNotFoundException ex ) {
return Class.forName( name );
}
}
protected void guessConfig() {
if( isLog4JAvailable() ) {
try {
Class proxyClass=findClassLoader().
Class proxyClass=
loadClass( "org.apache.commons.logging.Log4jFactory" );
proxyFactory=(LogFactory)proxyClass.newInstance();
} catch( Throwable t ) {
@@ -444,7 +458,7 @@ public class LogFactoryImpl extends LogFactory {
protected boolean isJdk14Available() {
try {
findClassLoader().loadClass("java.util.logging.Logger");
loadClass("java.util.logging.Logger");
return (true);
} catch (Throwable t) {
return (false);
@@ -459,7 +473,7 @@ public class LogFactoryImpl extends LogFactory {
protected boolean isLog4JAvailable() {
try {
findClassLoader().loadClass("org.apache.log4j.Category");
loadClass("org.apache.log4j.Category");
return (true);
} catch (Throwable t) {
return (false);