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Posted to cvs@avalon.apache.org by mc...@apache.org on 2003/09/09 11:40:30 UTC
cvs commit: avalon-sandbox/merlin/kernel/bootstrap/src/java BootstrapHelper.java Merlin.java ExceptionHelper.java
mcconnell 2003/09/09 02:40:30
Modified: merlin/kernel/bootstrap/src/java Merlin.java
Added: merlin/kernel/bootstrap/src/java BootstrapHelper.java
Removed: merlin/kernel/bootstrap/src/java ExceptionHelper.java
Log:
Updaye to add verbose content into the bootstrap loader.
Revision Changes Path
1.10 +71 -8 avalon-sandbox/merlin/kernel/bootstrap/src/java/Merlin.java
Index: Merlin.java
===================================================================
RCS file: /home/cvs/avalon-sandbox/merlin/kernel/bootstrap/src/java/Merlin.java,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- Merlin.java 7 Sep 2003 11:34:14 -0000 1.9
+++ Merlin.java 9 Sep 2003 09:40:30 -0000 1.10
@@ -113,6 +113,8 @@
*/
public static void main( String[] args ) throws Exception
{
+ boolean debug = isDebugEnabled( args );
+
//
// the base directory is the directory containing the
// the merlin jar repository
@@ -131,6 +133,11 @@
base.mkdirs();
}
+ if( debug )
+ {
+ System.out.println( "MERLIN BOOTSTRAP REPOSITORY: " + base );
+ }
+
//
// Establish the repository. If a system property corresponding to
// MERLIN_REPOSITORY_REMOTE_KEY is not null then setup the repository
@@ -144,6 +151,11 @@
System.getProperty( MERLIN_REPOSITORY_REMOTE_KEY );
if( remote != null )
{
+ if( debug )
+ {
+ System.out.println( "MERLIN BOOTSTRAP REMOTE: " + remote );
+ }
+
URL remoteURL = new URL( remote );
repository =
new DefaultFileRepository( base, null, new URL[]{ remoteURL } );
@@ -168,13 +180,20 @@
try
{
api = getURLs( repository, properties, MERLIN_API_CLASSPATH_KEY );
+ if( debug )
+ {
+ for( int i=0; i<api.length; i++ )
+ {
+ System.out.println( "API: (" + i + ") " + api[i] );
+ }
+ }
}
catch( Throwable e )
{
final String error =
"\nInternal error while attempting to build api classloader.";
String msg =
- ExceptionHelper.packException( error, e, true );
+ BootstrapHelper.packException( error, e, true );
System.err.println( msg );
return;
}
@@ -183,13 +202,20 @@
try
{
spi = getURLs( repository, properties, MERLIN_SPI_CLASSPATH_KEY );
+ if( debug )
+ {
+ for( int i=0; i<spi.length; i++ )
+ {
+ System.out.println( "SPI: (" + i + ") " + spi[i] );
+ }
+ }
}
catch( Throwable e )
{
final String error =
"\nInternal error while attempting to build api classloader.";
String msg =
- ExceptionHelper.packException( error, e, true );
+ BootstrapHelper.packException( error, e, true );
System.err.println( msg );
return;
}
@@ -198,13 +224,20 @@
try
{
impl = getURLs( repository, properties, MERLIN_IMPL_CLASSPATH_KEY );
+ if( debug )
+ {
+ for( int i=0; i<impl.length; i++ )
+ {
+ System.out.println( "IMP: (" + i + ") " + impl[i] );
+ }
+ }
}
catch( Throwable e )
{
final String error =
"\nInternal error while attempting to build implementation classloader.";
String msg =
- ExceptionHelper.packException( error, e, true );
+ BootstrapHelper.packException( error, e, true );
System.err.println( msg );
return;
}
@@ -216,9 +249,15 @@
ClassLoader apiLoader = new URLClassLoader( api );
ClassLoader spiLoader = new URLClassLoader( spi, apiLoader );
- ClassLoader loader = new URLClassLoader( impl, spiLoader );
+ URLClassLoader loader = new URLClassLoader( impl, spiLoader );
Thread.currentThread().setContextClassLoader( loader );
+ if( debug )
+ {
+ System.out.println( "CONTEXT CLASSLOADER DUMP" );
+ printClassLoader( loader );
+ }
+
//
// get the bootstrap kernel loader class
//
@@ -236,7 +275,7 @@
final String error =
"\nInternal error during loader class creation.";
String msg =
- ExceptionHelper.packException( error, e, true );
+ BootstrapHelper.packException( error, e, true );
System.err.println( msg );
return;
}
@@ -268,7 +307,7 @@
final String error =
"\nInternal error during kernel instantiation.";
String msg =
- ExceptionHelper.packException(
+ BootstrapHelper.packException(
error, target, true );
System.err.println( msg );
}
@@ -279,7 +318,7 @@
final String error =
"\nInternal error during kernel instantiation.";
String msg =
- ExceptionHelper.packException( error, e, true );
+ BootstrapHelper.packException( error, e, true );
System.err.println( msg );
return;
}
@@ -292,8 +331,9 @@
String label = getProperty( properties, key, i );
while( label != null )
{
+ i++;
list.add( getURL( repository, label ) );
- label = getProperty( properties, key, i++ );
+ label = getProperty( properties, key, i );
}
return (URL[]) list.toArray( new URL[0] );
}
@@ -332,5 +372,28 @@
"Internal bootstrap error. Unable to load item: " + item;
throw new BootstrapRuntimeException( error, e );
}
+ }
+
+ private static boolean isDebugEnabled( final String[] args )
+ {
+ for( int i=0; i<args.length; i++ )
+ {
+ final String arg = args[i];
+ if( arg.equals( "-debug" ) ) return true;
+ }
+ return false;
+ }
+
+ private static void printClassLoader( URLClassLoader loader )
+ {
+ URL[] urls = loader.getURLs();
+ for( int i=0; i<urls.length; i++ )
+ {
+ System.out.println( urls[i] );
+ }
+ if( loader.getParent() instanceof URLClassLoader )
+ {
+ printClassLoader( (URLClassLoader) loader.getParent() );
+ }
}
}
1.1 avalon-sandbox/merlin/kernel/bootstrap/src/java/BootstrapHelper.java
Index: BootstrapHelper.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.util.StringTokenizer;
/**
* General utilities supporting the packaging of exception messages.
* @author <a href="mailto:mcconnell@osm.net">Stephen McConnell</a>
*/
public class BootstrapHelper
{
private static final String LINE_SEPARATOR = System.getProperty( "line.separator" );
/**
* Returns the exception and causal exceptions as a formatted string.
* @param message the header message
* @param e the exception
* @return String the formatting string
*/
public static String packException( final String message, final Throwable e )
{
return packException( message, e, true );
}
/**
* Returns the exception and causal exceptions as a formatted string.
* @param message the header message
* @param e the exception
* @return String the formatting string
*/
public static String packException(
final String message, final Throwable e, boolean stack )
{
StringBuffer buffer = new StringBuffer();
buffer.append( message );
if( e == null )
{
return buffer.toString();
} else
{
buffer.append( "\n" );
buffer.append(
"-------------------------------------------------------------------" );
buffer.append( "\nException: " + e.getClass().getName() );
buffer.append( "\nMessage: " + e.getMessage() );
packCause( buffer, getCause( e ) ).toString();
}
Throwable root = getLastThrowable( e );
if( (root != null) && stack )
{
buffer.append(
"\n\n---- stack trace --------------------------------------------------" );
String[] trace = captureStackTrace( root );
for( int i = 0; i < trace.length; i++ )
{
buffer.append( "\n" + trace[i] );
}
}
buffer.append(
"\n-------------------------------------------------------------------" );
return buffer.toString();
}
private static StringBuffer packCause( StringBuffer buffer, Throwable cause )
{
if( cause == null )
{
return buffer;
}
buffer.append( "\n\nCause: " + cause.getClass().getName() );
buffer.append( "\nMessage: " + cause.getMessage() );
return packCause( buffer, getCause( cause ) );
}
private static Throwable getLastThrowable( Throwable exception )
{
Throwable cause = getCause( exception );
if( cause != null )
{
return getLastThrowable( cause );
}
return exception;
}
private static Throwable getCause( Throwable exception )
{
if( exception == null )
{
throw new NullPointerException( "exception" );
}
try
{
Method method = exception.getClass().getMethod( "getCause", new Class[0] );
return (Throwable) method.invoke( exception, new Object[0] );
} catch( Throwable e )
{
return null;
}
}
/**
* Captures the stack trace associated with this exception.
*
* @param throwable a <code>Throwable</code>
* @return an array of Strings describing stack frames.
*/
private static String[] captureStackTrace( final Throwable throwable )
{
final StringWriter sw = new StringWriter();
throwable.printStackTrace( new PrintWriter( sw, true ) );
return splitString( sw.toString(), LINE_SEPARATOR );
}
/**
* Splits the string on every token into an array of stack frames.
*
* @param string the string to split
* @param onToken the token to split on
* @return the resultant array
*/
private static String[] splitString( final String string, final String onToken )
{
final StringTokenizer tokenizer = new StringTokenizer( string, onToken );
final String[] result = new String[tokenizer.countTokens()];
for( int i = 0; i < result.length; i++ )
{
result[i] = tokenizer.nextToken();
}
return result;
}
private static void printCause( java.io.PrintStream out, Throwable e )
{
Throwable cause = getCause( e );
out.println( "Cause: " + cause.toString() );
if( getCause( cause ) != null )
{
printCause( out, cause );
}
}
}
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