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/*
* Fabric3
* Copyright (c) 2009-2013 Metaform Systems
*
* Fabric3 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 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 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.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see .
*/
package org.fabric3.contribution.war;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import org.oasisopen.sca.annotation.Destroy;
import org.oasisopen.sca.annotation.EagerInit;
import org.oasisopen.sca.annotation.Init;
import org.oasisopen.sca.annotation.Reference;
import org.fabric3.host.runtime.HostInfo;
import org.fabric3.spi.model.os.Library;
import org.fabric3.spi.contribution.archive.ClasspathProcessor;
import org.fabric3.spi.contribution.archive.ClasspathProcessorRegistry;
/**
* Creates a classpath based on the contents of a WAR. Specifically, adds jars contained in WEB-INF/lib and classes in WEB-INF/classes to the
* classpath.
*/
@EagerInit
public class WarClasspathProcessor implements ClasspathProcessor {
private static final Random RANDOM = new Random();
private final ClasspathProcessorRegistry registry;
private HostInfo info;
public WarClasspathProcessor(@Reference ClasspathProcessorRegistry registry, @Reference HostInfo info) {
this.registry = registry;
this.info = info;
}
@Init
public void init() {
registry.register(this);
}
@Destroy
public void destroy() {
registry.unregister(this);
}
public boolean canProcess(URL url) {
String name = url.getFile().toLowerCase();
return name.endsWith(".war");
}
public List process(URL url, List libraries) throws IOException {
List classpath = new ArrayList();
// add the the jar itself to the classpath
classpath.add(url);
// add libraries from the jar
addLibraries(classpath, url);
return classpath;
}
private void addLibraries(List classpath, URL jar) throws IOException {
File dir = info.getTempDir();
InputStream is = jar.openStream();
try {
JarInputStream jarStream = new JarInputStream(is);
JarEntry entry;
File classesDir = null;
while ((entry = jarStream.getNextJarEntry()) != null) {
if (entry.isDirectory()) {
continue;
}
String path = entry.getName();
if (path.startsWith("WEB-INF/lib/")) {
// expand jars in WEB-INF/lib and add to the classpath
File jarFile = File.createTempFile("fabric3", ".jar", dir);
OutputStream os = new BufferedOutputStream(new FileOutputStream(jarFile));
try {
copy(jarStream, os);
os.flush();
} finally {
os.close();
}
jarFile.deleteOnExit();
classpath.add(jarFile.toURI().toURL());
} else if (path.startsWith("WEB-INF/classes/")) {
// expand classes in WEB-INF/classes and add to classpath
if (classesDir == null) {
classesDir = new File(dir, "webclasses" + RANDOM.nextInt());
classesDir.mkdir();
classesDir.deleteOnExit();
}
int lastDelimeter = path.lastIndexOf("/");
String name = path.substring(lastDelimeter);
File pathAndPackageName;
if (lastDelimeter < 16) { // 16 is length of "WEB-INF/classes
// in case there is no trailing '/', i.e. properties files or other resources under WEB_INF/classes
pathAndPackageName = classesDir;
} else {
pathAndPackageName = new File(classesDir, path.substring(16, lastDelimeter));
}
pathAndPackageName.mkdirs();
pathAndPackageName.deleteOnExit();
File classFile = new File(pathAndPackageName, name);
OutputStream os = new BufferedOutputStream(new FileOutputStream(classFile));
try {
copy(jarStream, os);
os.flush();
} finally {
os.close();
}
classFile.deleteOnExit();
classpath.add(classesDir.toURI().toURL());
}
}
} finally {
is.close();
}
}
private int copy(InputStream input, OutputStream output) throws IOException {
byte[] buffer = new byte[4096];
int count = 0;
int n;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
count += n;
}
return count;
}
}
