org.fabric3.contribution.war.WarClasspathProcessor Maven / Gradle / Ivy
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/*
* Fabric3
* Copyright (c) 2009-2015 Metaform Systems
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* Portions originally based on Apache Tuscany 2007
* licensed under the Apache 2.0 license.
*/
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.MalformedURLException;
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.fabric3.api.host.Fabric3Exception;
import org.fabric3.api.host.runtime.HostInfo;
import org.fabric3.api.host.util.IOHelper;
import org.fabric3.spi.contribution.Contribution;
import org.fabric3.spi.contribution.ClasspathProcessor;
import org.fabric3.spi.contribution.ClasspathProcessorRegistry;
import org.fabric3.spi.model.os.Library;
import org.oasisopen.sca.annotation.Destroy;
import org.oasisopen.sca.annotation.EagerInit;
import org.oasisopen.sca.annotation.Init;
import org.oasisopen.sca.annotation.Reference;
/**
* 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(Contribution contribution) {
URL url = contribution.getLocation();
String name = url.getFile().toLowerCase();
return name.endsWith(".war");
}
public List process(Contribution contribution) throws Fabric3Exception {
URL url = contribution.getLocation();
List libraries = contribution.getManifest().getLibraries();
List classpath = new ArrayList<>();
// add the the jar itself to the classpath
classpath.add(url);
if (libraries.isEmpty() && !hasLibDirectory(new File(url.getFile()), "lib") && !hasLibDirectory(new File(url.getFile()), "classes")) {
return classpath;
}
try {
// add libraries from the jar
addLibraries(classpath, url);
} catch (IOException e) {
throw new Fabric3Exception(e);
}
return classpath;
}
private void addLibraries(List classpath, URL jar) throws IOException {
File dir = info.getTempDir();
try (InputStream is = jar.openStream()) {
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);
try (OutputStream os = new BufferedOutputStream(new FileOutputStream(jarFile))) {
copy(jarStream, os);
os.flush();
}
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);
try (OutputStream os = new BufferedOutputStream(new FileOutputStream(classFile))) {
copy(jarStream, os);
os.flush();
}
classFile.deleteOnExit();
classpath.add(classesDir.toURI().toURL());
}
}
}
}
private boolean hasLibDirectory(File file, String dir) {
InputStream stream = null;
try {
URL jarUrl = new URL("jar:" + file.toURI().toURL().toExternalForm() + "!/WEB-INF/" + dir);
stream = jarUrl.openStream();
return true;
} catch (MalformedURLException e) {
return false;
} catch (IOException e) {
return false;
} finally {
try {
IOHelper.closeQuietly(stream);
} catch (NullPointerException e) {
// ignore will be thrown if the directory exists as the underlying stream is null
}
}
}
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;
}
}