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/* |
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* Copyright 2011 gitblit.com. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package com.gitblit; |
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import java.io.File; |
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import java.io.FileFilter; |
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import java.io.IOException; |
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import java.lang.reflect.Method; |
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import java.net.URL; |
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import java.net.URLClassLoader; |
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import java.security.ProtectionDomain; |
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import java.text.MessageFormat; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.List; |
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/** |
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* Launch helper class that adds all jars found in the local "lib" & "ext" |
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* folders and then calls the application main. Using this technique we do not |
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* have to specify a classpath and we can dynamically add jars to the |
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* distribution. |
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* |
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* @author James Moger |
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* |
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*/ |
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public class Launcher { |
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public static final boolean DEBUG = false; |
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/** |
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* Parameters of the method to add an URL to the System classes. |
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*/ |
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private static final Class<?>[] PARAMETERS = new Class[] { URL.class }; |
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public static void main(String[] args) { |
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if (DEBUG) { |
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System.out.println("jcp=" + System.getProperty("java.class.path")); |
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ProtectionDomain protectionDomain = Launcher.class.getProtectionDomain(); |
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System.out.println("launcher=" |
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+ protectionDomain.getCodeSource().getLocation().toExternalForm()); |
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} |
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// Load the JARs in the lib and ext folder |
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String[] folders = new String[] { "lib", "ext" }; |
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List<File> jars = new ArrayList<File>(); |
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for (String folder : folders) { |
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if (folder == null) { |
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continue; |
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} |
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File libFolder = new File(folder); |
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if (!libFolder.exists()) { |
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continue; |
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} |
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List<File> found = findJars(libFolder.getAbsoluteFile()); |
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jars.addAll(found); |
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} |
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// sort the jars by name and then reverse the order so the newer version |
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// of the library gets loaded in the event that this is an upgrade |
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Collections.sort(jars); |
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Collections.reverse(jars); |
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if (jars.size() == 0) { |
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for (String folder : folders) { |
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File libFolder = new File(folder); |
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// this is a test of adding a comment |
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// more really interesting things |
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System.err.println("Failed to find any JARs in " + libFolder.getPath()); |
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} |
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System.exit(-1); |
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} else { |
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for (File jar : jars) { |
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try { |
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jar.canRead(); |
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addJarFile(jar); |
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} catch (Throwable t) { |
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t.printStackTrace(); |
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} |
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} |
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} |
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// Start Server |
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GitBlitServer.main(args); |
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} |
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public static List<File> findJars(File folder) { |
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List<File> jars = new ArrayList<File>(); |
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if (folder.exists()) { |
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File[] libs = folder.listFiles(new FileFilter() { |
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@Override |
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public boolean accept(File file) { |
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return !file.isDirectory() && file.getName().toLowerCase().endsWith(".jar"); |
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} |
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}); |
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if (libs != null && libs.length > 0) { |
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jars.addAll(Arrays.asList(libs)); |
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if (DEBUG) { |
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for (File jar : jars) { |
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System.out.println("found " + jar); |
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} |
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} |
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} |
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} |
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return jars; |
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} |
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/** |
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* Adds a file to the classpath |
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* |
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* @param f |
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* the file to be added |
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* @throws IOException |
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*/ |
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public static void addJarFile(File f) throws IOException { |
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if (f.getName().indexOf("-sources") > -1 || f.getName().indexOf("-javadoc") > -1) { |
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// don't add source or javadoc jars to runtime classpath |
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return; |
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} |
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URL u = f.toURI().toURL(); |
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if (DEBUG) { |
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System.out.println("load=" + u.toExternalForm()); |
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} |
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URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader(); |
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Class<?> sysclass = URLClassLoader.class; |
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try { |
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Method method = sysclass.getDeclaredMethod("addURL", PARAMETERS); |
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method.setAccessible(true); |
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method.invoke(sysloader, new Object[] { u }); |
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} catch (Throwable t) { |
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throw new IOException(MessageFormat.format( |
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"Error, could not add {0} to system classloader", f.getPath()), t); |
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} |
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} |
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} |