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/*
* Copyright 2011 gitblit.com.
*
* 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.
*/
package com.gitblit;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.ProtectionDomain;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* Launch helper class that adds all jars found in the local "lib" & "ext"
* folders and then calls the application main. Using this technique we do not
* have to specify a classpath and we can dynamically add jars to the
* distribution.
*
* @author James Moger
*
*/
public class Launcher {
public static final boolean DEBUG = false;
/**
* Parameters of the method to add an URL to the System classes.
*/
private static final Class<?>[] PARAMETERS = new Class[] { URL.class };
public static void main(String[] args) {
if (DEBUG) {
System.out.println("jcp=" + System.getProperty("java.class.path"));
ProtectionDomain protectionDomain = Launcher.class.getProtectionDomain();
System.out.println("launcher="
+ protectionDomain.getCodeSource().getLocation().toExternalForm());
}
// Load the JARs in the lib and ext folder
String[] folders = new String[] { "lib", "ext" };
List<File> jars = new ArrayList<File>();
for (String folder : folders) {
if (folder == null) {
continue;
}
File libFolder = new File(folder);
if (!libFolder.exists()) {
continue;
}
List<File> found = findJars(libFolder.getAbsoluteFile());
jars.addAll(found);
}
// sort the jars by name and then reverse the order so the newer version
// of the library gets loaded in the event that this is an upgrade
Collections.sort(jars);
Collections.reverse(jars);
if (jars.size() == 0) {
for (String folder : folders) {
File libFolder = new File(folder);
// this is a test of adding a comment
// more really interesting things
System.err.println("Failed to find any JARs in " + libFolder.getPath());
}
System.exit(-1);
} else {
for (File jar : jars) {
try {
jar.canRead();
addJarFile(jar);
} catch (Throwable t) {
t.printStackTrace();
}
}
}
// Start Server
GitBlitServer.main(args);
}
public static List<File> findJars(File folder) {
List<File> jars = new ArrayList<File>();
if (folder.exists()) {
File[] libs = folder.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return !file.isDirectory() && file.getName().toLowerCase().endsWith(".jar");
}
});
if (libs != null && libs.length > 0) {
jars.addAll(Arrays.asList(libs));
if (DEBUG) {
for (File jar : jars) {
System.out.println("found " + jar);
}
}
}
}
return jars;
}
/**
* Adds a file to the classpath
*
* @param f
* the file to be added
* @throws IOException
*/
public static void addJarFile(File f) throws IOException {
if (f.getName().indexOf("-sources") > -1 || f.getName().indexOf("-javadoc") > -1) {
// don't add source or javadoc jars to runtime classpath
return;
}
URL u = f.toURI().toURL();
if (DEBUG) {
System.out.println("load=" + u.toExternalForm());
}
URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class<?> sysclass = URLClassLoader.class;
try {
Method method = sysclass.getDeclaredMethod("addURL", PARAMETERS);
method.setAccessible(true);
method.invoke(sysloader, new Object[] { u });
} catch (Throwable t) {
throw new IOException(MessageFormat.format(
"Error, could not add {0} to system classloader", f.getPath()), t);
}
}
}
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