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[LOGGING-37] Improve performance of LogFactory#getFactory() by calling getContextClassLoader() directly instead of using reflection. Drop support for JDK1.1.

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git-svn-id: https://svn.apache.org/repos/asf/commons/proper/logging/trunk@1606041 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas Neidhart
2014-06-27 11:56:59 +00:00
parent 50e985a9ab
commit 71097fbd86
2 changed files with 19 additions and 58 deletions
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73
src/main/java/org/apache/commons/logging/LogFactory.java
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@@ -23,8 +23,6 @@ import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLConnection;
import java.security.AccessController;
@@ -787,8 +785,6 @@ public abstract class LogFactory {
* or null if security doesn't allow it.
* @throws LogConfigurationException if there was some weird error while
* attempting to get the context classloader.
* @throws SecurityException if the current java security policy doesn't
* allow this class to access the context classloader.
*/
protected static ClassLoader getContextClassLoader() throws LogConfigurationException {
return directGetContextClassLoader();
@@ -807,8 +803,6 @@ public abstract class LogFactory {
* or null if security doesn't allow it.
* @throws LogConfigurationException if there was some weird error while
* attempting to get the context classloader.
* @throws SecurityException if the current java security policy doesn't
* allow this class to access the context classloader.
*/
private static ClassLoader getContextClassLoaderInternal() throws LogConfigurationException {
return (ClassLoader)AccessController.doPrivileged(
@@ -834,64 +828,27 @@ public abstract class LogFactory {
*
* @throws LogConfigurationException if a suitable class loader
* cannot be identified.
* @throws SecurityException if the java security policy forbids
* access to the context classloader from one of the classes in the
* current call stack.
* @return the thread's context classloader or {@code null} if the java security
* policy forbids access to the context classloader from one of the classes
* in the current call stack.
* @since 1.1
*/
protected static ClassLoader directGetContextClassLoader() throws LogConfigurationException {
ClassLoader classLoader = null;
try {
// Are we running on a JDK 1.2 or later system?
final Method method = Thread.class.getMethod("getContextClassLoader", (Class[]) null);
// Get the thread context class loader (if there is one)
try {
classLoader = (ClassLoader)method.invoke(Thread.currentThread(), (Object[]) null);
} catch (IllegalAccessException e) {
throw new LogConfigurationException
("Unexpected IllegalAccessException", e);
} catch (InvocationTargetException e) {
/**
* InvocationTargetException is thrown by 'invoke' when
* the method being invoked (getContextClassLoader) throws
* an exception.
*
* getContextClassLoader() throws SecurityException when
* the context class loader isn't an ancestor of the
* calling class's class loader, or if security
* permissions are restricted.
*
* In the first case (not related), we want to ignore and
* keep going. We cannot help but also ignore the second
* with the logic below, but other calls elsewhere (to
* obtain a class loader) will trigger this exception where
* we can make a distinction.
*/
if (e.getTargetException() instanceof SecurityException) {
// ignore
} else {
// Capture 'e.getTargetException()' exception for details
// alternate: log 'e.getTargetException()', and pass back 'e'.
throw new LogConfigurationException("Unexpected InvocationTargetException", e.getTargetException());
}
}
} catch (NoSuchMethodException e) {
// Assume we are running on JDK 1.1
classLoader = getClassLoader(LogFactory.class);
// We deliberately don't log a message here to outputStream;
// this message would be output for every call to LogFactory.getLog()
// when running on JDK1.1
//
// if (outputStream != null) {
// outputStream.println(
// "Method Thread.getContextClassLoader does not exist;"
// + " assuming this is JDK 1.1, and that the context"
// + " classloader is the same as the class that loaded"
// + " the concrete LogFactory class.");
// }
classLoader = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
/**
* getContextClassLoader() throws SecurityException when
* the context class loader isn't an ancestor of the
* calling class's class loader, or if security
* permissions are restricted.
*
* We ignore this exception to be consistent with the previous
* behavior (e.g. 1.1.3 and earlier).
*/
// ignore
}
// Return the selected class loader