/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.loader;
import java.util.ArrayList;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import com.caucho.config.ConfigException;
import com.caucho.config.Configurable;
import com.caucho.config.types.FileSetType;
import com.caucho.config.types.PathPatternType;
import com.caucho.vfs.Path;
/**
* Class loader which checks for changes in class files and automatically
* picks up new jars.
*/
@Configurable
public class LibraryLoader extends JarListLoader {
// Configured path.
private Path _path;
private FileSetType _fileSet;
// list of the matching paths
private ArrayList<Path> _pathList = new ArrayList<Path>();
// list of the matching paths
private ArrayList<Path> _newPathList = new ArrayList<Path>();
/**
* Creates a new directory loader.
*/
public LibraryLoader()
{
}
public LibraryLoader(ClassLoader loader)
{
super(loader);
}
/**
* Creates a new directory loader.
*/
public LibraryLoader(ClassLoader loader, Path path)
{
this(loader);
_path = path;
try {
init();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* The library loader's path.
*/
public void setPath(Path path)
{
_path = path;
}
/**
* The library loader's path.
*/
public Path getPath()
{
return _path;
}
/**
* Sets a file set.
*/
public void setFileset(FileSetType fileSet)
{
_fileSet = fileSet;
}
/**
* Create a new class loader
*
* @param parent parent class loader
* @param dir directories which can handle dynamic jar addition
*/
public static DynamicClassLoader create(ClassLoader parent, Path path)
{
DynamicClassLoader loader = new DynamicClassLoader(parent);
LibraryLoader dirLoader = new LibraryLoader(loader, path);
dirLoader.init();
loader.init();
return loader;
}
/**
* Initialize
*/
@PostConstruct
@Override
public void init()
throws ConfigException
{
super.init();
try {
if (_fileSet != null) {
}
else if (_path.getPath().endsWith(".jar")
|| _path.getPath().endsWith(".zip")) {
_fileSet = new FileSetType();
_fileSet.setDir(_path.getParent());
_fileSet.addInclude(new PathPatternType(_path.getTail()));
}
else {
_fileSet = new FileSetType();
_fileSet.setDir(_path);
_fileSet.addInclude(new PathPatternType("*.jar"));
_fileSet.addInclude(new PathPatternType("*.zip"));
}
fillJars();
} catch (ConfigException e) {
throw e;
} catch (Exception e) {
throw ConfigException.create(e);
}
}
/**
* True if any of the loaded classes have been modified. If true, the
* caller should drop the classpath and create a new one.
*/
@Override
public boolean isModified()
{
_newPathList.clear();
_fileSet.getPaths(_newPathList);
return ! _newPathList.equals(_pathList);
}
/**
* True if the classes in the directory have changed.
*/
@Override
public boolean logModified(Logger log)
{
if (isModified()) {
log.info(_path.getNativePath() + " has modified jar files");
return true;
}
else
return false;
}
/**
* Find all the jars in this directory and add them to jarList.
*/
private void fillJars()
{
_pathList.clear();
_jarList.clear();
_fileSet.getPaths(_pathList);
for (int i = 0; i < _pathList.size(); i++) {
Path jar = _pathList.get(i);
addJar(jar);
}
}
public Path getCodePath()
{
return _fileSet.getDir();
}
/**
* Destroys the loader, closing the jars.
*/
@Override
protected void destroy()
{
clearJars();
}
@Override
public String toString()
{
return getClass().getSimpleName() + "[" + _fileSet + "]";
}
}