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Puts together an ActiveMQ OSGi bundle
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.activemq.console;
import java.io.File;
import java.io.InputStream;
import java.io.PrintStream;
import java.lang.management.ManagementFactory;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
/**
* Main class that can bootstrap an ActiveMQ broker console. Handles command
* line argument parsing to set up and run broker tasks.
*/
public class Main {
public static final String TASK_DEFAULT_CLASS = "org.apache.activemq.console.command.ShellCommand";
private static boolean useDefExt = true;
private File activeMQHome;
private File activeMQBase;
private ClassLoader classLoader;
private final Set extensions = new LinkedHashSet();
private final Set activeMQClassPath = new LinkedHashSet();
public static void main(String[] args) {
// Create the tmpdir if it does not exist yet..
File tmpdir = new File(System.getProperty("java.io.tmpdir"));
if(!tmpdir.exists()) {
tmpdir.mkdirs();
}
Main app = new Main();
// Convert arguments to collection for easier management
List tokens = new LinkedList(Arrays.asList(args));
// Parse for extension directory option
app.parseExtensions(tokens);
// lets add the conf directory first, to find the log4j.properties just in case its not
// in the activemq.classpath system property or some jar incorrectly includes one
File confDir = app.getActiveMQConfig();
app.addClassPath(confDir);
// Add the following to the classpath:
//
// ${activemq.base}/conf
// ${activemq.base}/lib/* (only if activemq.base != activemq.home)
// ${activemq.home}/lib/*
// ${activemq.base}/lib/optional/* (only if activemq.base !=
// activemq.home)
// ${activemq.home}/lib/optional/*
// ${activemq.base}/lib/web/* (only if activemq.base != activemq.home)
// ${activemq.home}/lib/web/*
//
if (useDefExt && app.canUseExtdir()) {
boolean baseIsHome = app.getActiveMQBase().equals(app.getActiveMQHome());
File baseLibDir = new File(app.getActiveMQBase(), "lib");
File homeLibDir = new File(app.getActiveMQHome(), "lib");
if (!baseIsHome) {
app.addExtensionDirectory(baseLibDir);
}
app.addExtensionDirectory(homeLibDir);
if (!baseIsHome) {
app.addExtensionDirectory(new File(baseLibDir, "camel"));
app.addExtensionDirectory(new File(baseLibDir, "optional"));
app.addExtensionDirectory(new File(baseLibDir, "web"));
app.addExtensionDirectory(new File(baseLibDir, "extra"));
}
app.addExtensionDirectory(new File(homeLibDir, "camel"));
app.addExtensionDirectory(new File(homeLibDir, "optional"));
app.addExtensionDirectory(new File(homeLibDir, "web"));
app.addExtensionDirectory(new File(homeLibDir, "extra"));
}
// Add any custom classpath specified from the system property
// activemq.classpath
app.addClassPathList(System.getProperty("activemq.classpath"));
try {
app.runTaskClass(tokens);
System.exit(0);
} catch (ClassNotFoundException e) {
System.out.println("Could not load class: " + e.getMessage());
try {
ClassLoader cl = app.getClassLoader();
if (cl != null) {
System.out.println("Class loader setup: ");
printClassLoaderTree(cl);
}
} catch (MalformedURLException e1) {
}
System.exit(1);
} catch (Throwable e) {
System.out.println("Failed to execute main task. Reason: " + e);
System.exit(1);
}
}
/**
* Print out what's in the classloader tree being used.
*
* @param cl
* @return depth
*/
private static int printClassLoaderTree(ClassLoader cl) {
int depth = 0;
if (cl.getParent() != null) {
depth = printClassLoaderTree(cl.getParent()) + 1;
}
StringBuffer indent = new StringBuffer();
for (int i = 0; i < depth; i++) {
indent.append(" ");
}
if (cl instanceof URLClassLoader) {
URLClassLoader ucl = (URLClassLoader)cl;
System.out.println(indent + cl.getClass().getName() + " {");
URL[] urls = ucl.getURLs();
for (int i = 0; i < urls.length; i++) {
System.out.println(indent + " " + urls[i]);
}
System.out.println(indent + "}");
} else {
System.out.println(indent + cl.getClass().getName());
}
return depth;
}
public void parseExtensions(List tokens) {
if (tokens.isEmpty()) {
return;
}
int count = tokens.size();
int i = 0;
// Parse for all --extdir and --noDefExt options
while (i < count) {
String token = tokens.get(i);
// If token is an extension dir option
if (token.equals("--extdir")) {
// Process token
count--;
tokens.remove(i);
// If no extension directory is specified, or next token is
// another option
if (i >= count || tokens.get(i).startsWith("-")) {
System.out.println("Extension directory not specified.");
System.out.println("Ignoring extension directory option.");
continue;
}
// Process extension dir token
count--;
File extDir = new File(tokens.remove(i));
if (!canUseExtdir()) {
System.out.println("Extension directory feature not available due to the system classpath being able to load: " + TASK_DEFAULT_CLASS);
System.out.println("Ignoring extension directory option.");
continue;
}
if (!extDir.isDirectory()) {
System.out.println("Extension directory specified is not valid directory: " + extDir);
System.out.println("Ignoring extension directory option.");
continue;
}
addExtensionDirectory(extDir);
} else if (token.equals("--noDefExt")) { // If token is
// --noDefExt option
count--;
tokens.remove(i);
useDefExt = false;
} else {
i++;
}
}
}
public void runTaskClass(List tokens) throws Throwable {
StringBuilder buffer = new StringBuilder();
buffer.append(System.getProperty("java.vendor"));
buffer.append(" ");
buffer.append(System.getProperty("java.version"));
buffer.append(" ");
buffer.append(System.getProperty("java.home"));
System.out.println("Java Runtime: " + buffer.toString());
buffer = new StringBuilder();
buffer.append("current=");
buffer.append(Runtime.getRuntime().totalMemory()/1024L);
buffer.append("k free=");
buffer.append(Runtime.getRuntime().freeMemory()/1024L);
buffer.append("k max=");
buffer.append(Runtime.getRuntime().maxMemory()/1024L);
buffer.append("k");
System.out.println(" Heap sizes: " + buffer.toString());
List jvmArgs = ManagementFactory.getRuntimeMXBean().getInputArguments();
buffer = new StringBuilder();
for (Object arg : jvmArgs) {
buffer.append(" ").append(arg);
}
System.out.println(" JVM args:" + buffer.toString());
System.out.println("Extensions classpath:\n " + getExtensionDirForLogging());
System.out.println("ACTIVEMQ_HOME: " + getActiveMQHome());
System.out.println("ACTIVEMQ_BASE: " + getActiveMQBase());
System.out.println("ACTIVEMQ_CONF: " + getActiveMQConfig());
System.out.println("ACTIVEMQ_DATA: " + getActiveMQDataDir());
ClassLoader cl = getClassLoader();
Thread.currentThread().setContextClassLoader(cl);
// Use reflection to run the task.
try {
String[] args = tokens.toArray(new String[tokens.size()]);
Class task = cl.loadClass(TASK_DEFAULT_CLASS);
Method runTask = task.getMethod("main", new Class[] {
String[].class, InputStream.class, PrintStream.class
});
runTask.invoke(task.newInstance(), args, System.in, System.out);
} catch (InvocationTargetException e) {
throw e.getCause();
}
}
public void addExtensionDirectory(File directory) {
extensions.add(directory);
}
public void addClassPathList(String fileList) {
if (fileList != null && fileList.length() > 0) {
StringTokenizer tokenizer = new StringTokenizer(fileList, ";");
while (tokenizer.hasMoreTokens()) {
addClassPath(new File(tokenizer.nextToken()));
}
}
}
public void addClassPath(File classpath) {
activeMQClassPath.add(classpath);
}
/**
* The extension directory feature will not work if the broker factory is
* already in the classpath since we have to load him from a child
* ClassLoader we build for it to work correctly.
*
* @return true, if extension dir can be used. false otherwise.
*/
public boolean canUseExtdir() {
try {
Main.class.getClassLoader().loadClass(TASK_DEFAULT_CLASS);
return false;
} catch (ClassNotFoundException e) {
return true;
}
}
public ClassLoader getClassLoader() throws MalformedURLException {
if (classLoader == null) {
// Setup the ClassLoader
classLoader = Main.class.getClassLoader();
if (!extensions.isEmpty() || !activeMQClassPath.isEmpty()) {
ArrayList urls = new ArrayList();
for (Iterator iter = activeMQClassPath.iterator(); iter.hasNext();) {
File dir = iter.next();
urls.add(dir.toURI().toURL());
}
for (Iterator iter = extensions.iterator(); iter.hasNext();) {
File dir = iter.next();
if (dir.isDirectory()) {
File[] files = dir.listFiles();
if (files != null) {
// Sort the jars so that classpath built is consistently in the same
// order. Also allows us to use jar names to control classpath order.
Arrays.sort(files, new Comparator() {
public int compare(File f1, File f2) {
return f1.getName().compareTo(f2.getName());
}
});
for (int j = 0; j < files.length; j++) {
if (files[j].getName().endsWith(".zip") || files[j].getName().endsWith(".jar")) {
urls.add(files[j].toURI().toURL());
}
}
}
}
}
URL u[] = new URL[urls.size()];
urls.toArray(u);
classLoader = new URLClassLoader(u, classLoader);
}
Thread.currentThread().setContextClassLoader(classLoader);
}
return classLoader;
}
public void setActiveMQHome(File activeMQHome) {
this.activeMQHome = activeMQHome;
}
public File getActiveMQHome() {
if (activeMQHome == null) {
if (System.getProperty("activemq.home") != null) {
activeMQHome = new File(System.getProperty("activemq.home"));
}
if (activeMQHome == null) {
// guess from the location of the jar
URL url = Main.class.getClassLoader().getResource("org/apache/activemq/console/Main.class");
if (url != null) {
try {
JarURLConnection jarConnection = (JarURLConnection)url.openConnection();
url = jarConnection.getJarFileURL();
URI baseURI = new URI(url.toString()).resolve("..");
activeMQHome = new File(baseURI).getCanonicalFile();
System.setProperty("activemq.home", activeMQHome.getAbsolutePath());
} catch (Exception ignored) {
}
}
}
if (activeMQHome == null) {
activeMQHome = new File("../.");
System.setProperty("activemq.home", activeMQHome.getAbsolutePath());
}
}
return activeMQHome;
}
public File getActiveMQBase() {
if (activeMQBase == null) {
if (System.getProperty("activemq.base") != null) {
activeMQBase = new File(System.getProperty("activemq.base"));
}
if (activeMQBase == null) {
activeMQBase = getActiveMQHome();
System.setProperty("activemq.base", activeMQBase.getAbsolutePath());
}
}
return activeMQBase;
}
public File getActiveMQConfig() {
File activeMQConfig = null;
if (System.getProperty("activemq.conf") != null) {
activeMQConfig = new File(System.getProperty("activemq.conf"));
} else {
activeMQConfig = new File(getActiveMQBase() + "/conf");
System.setProperty("activemq.conf", activeMQConfig.getAbsolutePath());
}
return activeMQConfig;
}
public File getActiveMQDataDir() {
File activeMQDataDir = null;
if (System.getProperty("activemq.data") != null) {
activeMQDataDir = new File(System.getProperty("activemq.data"));
} else {
activeMQDataDir = new File(getActiveMQBase() + "/data");
System.setProperty("activemq.data", activeMQDataDir.getAbsolutePath());
}
return activeMQDataDir;
}
public String getExtensionDirForLogging() {
StringBuilder sb = new StringBuilder("[");
for (Iterator it = extensions.iterator(); it.hasNext();) {
File file = it.next();
sb.append(file.getPath());
if (it.hasNext()) {
sb.append(",");
}
}
sb.append("]");
return sb.toString();
}
}