Java tutorial
/* Copyright (C) 2012 The Stanford MobiSocial Laboratory 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 edu.stanford.epadd.launcher; import edu.stanford.ejalbert.BrowserLauncher; import edu.stanford.ejalbert.exception.BrowserLaunchingInitializingException; import edu.stanford.ejalbert.exception.UnsupportedOperatingSystemException; import edu.stanford.epadd.test.Tester; import org.apache.catalina.Context; import org.apache.catalina.Session; import org.apache.catalina.startup.Tomcat; import org.apache.commons.cli.*; import org.apache.log4j.PropertyConfigurator; import org.apache.tomcat.util.http.fileupload.FileUtils; import javax.servlet.ServletException; import javax.servlet.http.HttpSession; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.io.*; import java.net.*; import java.util.*; import java.util.List; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; class Splash extends Frame implements ActionListener { Graphics2D g; SplashScreen splash = SplashScreen.getSplashScreen(); void close() { splash.close(); } void setSplashText(String text) { if (splash == null) return; int SPLASH_SCREEN_WIDTH = ((int) splash.getBounds().getWidth()); int MARGIN = 10; // margin for text on each side // clear the previous text g.setColor(new Color(1, 117, 188)); // epadd color, #0175bc g.fillRect(0, 175, SPLASH_SCREEN_WIDTH, 40); g.setPaintMode(); // write the new text g.setColor(Color.WHITE); // #0175bc g.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 14)); // compute the startX so as to center align the string, int stringWidth = g.getFontMetrics().stringWidth(text); int startX = (stringWidth > (SPLASH_SCREEN_WIDTH - MARGIN * 2)) ? MARGIN : MARGIN + (SPLASH_SCREEN_WIDTH - stringWidth) / 2; g.drawString(text, startX, 200); splash.update(); } public Splash() { final SplashScreen splash = (System.getProperty("nobrowseropen") == null) ? SplashScreen.getSplashScreen() : null; if (splash == null) { System.out.println("SplashScreen.getSplashScreen() returned null"); return; } Rectangle r = splash.getBounds(); g = splash.createGraphics(); if (g == null) { System.out.println("splash.createGraphics() returned null"); return; } /* code to prevent text from appearing too pixelated - https://stackoverflow.com/questions/31536952/how-to-fix-text-quality-in-java-graphics */ Map<?, ?> desktopHints = (Map<?, ?>) Toolkit.getDefaultToolkit() .getDesktopProperty("awt.font.desktophints"); if (desktopHints != null) { g.setRenderingHints(desktopHints); } System.out.println("splash url = " + splash.getImageURL() + " w=" + r.getWidth() + " h=" + r.getHeight() + " size=" + r.getSize() + " loc=" + r.getLocation()); // setVisible(true); // toFront(); } public void actionPerformed(ActionEvent ae) { // System.exit(0); } static WindowListener closeWindow = new WindowAdapter() { public void windowClosing(WindowEvent e) { e.getWindow().dispose(); } }; } /** main launcher class for tomcat with the epadd.war webapp */ public class ePADD { public static String EPADD_PROPS_FILE = System.getProperty("user.home") + File.separator + "epadd.properties"; static PrintStream savedSystemOut, savedSystemErr; static PrintStream out = System.out, err = System.err; static BrowserLauncher launcher; static String preferredBrowser; static Tomcat server; static String BASE_URL, APP_CHECK_URL, WEBAPP_NAME = "epadd"; static boolean debug = false; //static String debugFile; static final int TIMEOUT_SECS = 60; static Context EPADD_WEBAPP; // this will be used by shutdown thread to find sessions and close them down cleanly static String SETTINGS_DIR = null; static boolean IS_DISCOVERY_MODE = false; private static final int MB = 1024 * 1024; final static int DEFAULT_PORT = 9099; static int PORT = DEFAULT_PORT; private static java.awt.Desktop desktop; private static boolean browserOpen = true; private static String startPage = null; private static Splash SPLASH; static { if (System.getProperty("nobrowseropen") == null) { desktop = java.awt.Desktop.getDesktop(); } } // necessary to do this early, causes problems with java 7 (both for taskbar icon and launching a browser) if you try and do it later private static void tellUser(String s) { out.println(s); if (SPLASH != null) SPLASH.setSplashText(s); } // reads the resourceName from the classpath, copies it to rootDir. clears it if it already existed private static void copyResource(String resourceName, String rootDir) throws IOException, ServletException { String file = rootDir + File.separatorChar + resourceName; // extract the war to tmpdir { final URL resourceUrl = ePADD.class.getClassLoader().getResource(resourceName); if (resourceUrl == null) { tellUser("Sorry! Unable to locate file on classpath: " + resourceName); throw new RuntimeException("Sorry! Unable to locate file on classpath: " + resourceName); } InputStream is = resourceUrl.openStream(); out.println("Copying: " + resourceName + " to " + file + " is=" + is); File existingFile = new File(file); if (existingFile.exists()) tellUser("Existing file: " + file); copy_stream_to_file(is, file); File newFile = new File(file); if (!newFile.exists()) { tellUser("Sorry! Unable to copy file: " + file); throw new RuntimeException("Sorry! Unable to copy file: " + file); } out.println("Copied resource + " + resourceName + " with size " + newFile.length() + " bytes to " + newFile.getAbsolutePath()); } } //reads the resourceName from classpath, copies it to rootdir (handles direcotry as well..That is why different from the above method. /*public static void copyResourcesRecursively(String resourceName, String destDir ) throws IOException { { final URL resourceUrl = ePADD.class.getClassLoader().getResource(resourceName); if (resourceUrl == null) { tellUser("Sorry! Unable to locate file on classpath: " + resourceName); throw new RuntimeException ("Sorry! Unable to locate file on classpath: " + resourceName); } JarEntry resourcentry = ((JarURLConnection)resourceUrl.openConnection()).getJarEntry(); JarFile jfile = ((JarURLConnection)resourceUrl.openConnection()).getJarFile(); Enumeration<JarEntry> jenums = jfile.entries(); Set<String> resnames = new LinkedHashSet<>(); while(jenums.hasMoreElements()){ JarEntry jen = jenums.nextElement(); if(jen.isDirectory()) resnames.add(jen.getName()); } InputStream is = jfile.getInputStream(resourcentry); try { File dirpath = new File(resourceUrl.toURI()); if(dirpath.isDirectory()){ new File(destDir).mkdir(); org.apache.commons.io.FileUtils.copyDirectory(dirpath,new File(destDir)); } } catch (URISyntaxException e) { e.printStackTrace(); } InputStream iis = resourceUrl.openStream(); out.println("Copying: " + resourceName + " to " + destDir + " is=" + is); *//*File existingFile = new File(file); if (existingFile.exists()) tellUser("Existing file: " + file); copy_stream_to_file(is, file); File newFile = new File(file); if (!newFile.exists()) { tellUser("Sorry! Unable to copy file: " + file); throw new RuntimeException ("Sorry! Unable to copy file: " + file); }*//* out.println("Copied resource + " + resourceName + " with size " + destDir.length() + " bytes to "); } }*/ private static void copyResourcesRecursively(String sourceDirectory, String writeDirectory) throws IOException { final URL dirURL = ePADD.class.getClassLoader().getResource(sourceDirectory); //final String path = sourceDirectory.substring( 1 ); if ((dirURL != null) && dirURL.getProtocol().equals("jar")) { final JarURLConnection jarConnection = (JarURLConnection) dirURL.openConnection(); //System.out.println( "jarConnection is " + jarConnection ); final ZipFile jar = jarConnection.getJarFile(); final Enumeration<? extends ZipEntry> entries = jar.entries(); // gives ALL entries in jar while (entries.hasMoreElements()) { final ZipEntry entry = entries.nextElement(); final String name = entry.getName(); // System.out.println( name ); if (!name.startsWith(sourceDirectory)) { // entry in wrong subdir -- don't copy continue; } final String entryTail = name.substring(sourceDirectory.length()); final File f = new File(writeDirectory + File.separator + entryTail); if (entry.isDirectory()) { // if its a directory, create it final boolean bMade = f.mkdir(); System.out.println((bMade ? " creating " : " unable to create ") + name); } else { System.out.println(" writing " + name); final InputStream is = jar.getInputStream(entry); final OutputStream os = new BufferedOutputStream(new FileOutputStream(f)); final byte buffer[] = new byte[4096]; int readCount; // write contents of 'is' to 'os' while ((readCount = is.read(buffer)) > 0) { os.write(buffer, 0, readCount); } os.close(); is.close(); } } } else if (dirURL == null) { throw new IllegalStateException("can't find " + sourceDirectory + " on the classpath"); } else { // not a "jar" protocol URL throw new IllegalStateException("don't know how to handle extracting from " + dirURL); } } private static boolean isURLAlive(String url) throws IOException { try { // attempt to fetch the page // throws a connect exception if the server is not even running // so catch it and return false // since "index" may auto load default archive, attach it to session, and redirect to "info" page, // we need to maintain the session across the pages. // see "Maintaining the session" at http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL)); out.println("Testing for already running ePADD by probing " + url); HttpURLConnection u = (HttpURLConnection) new URL(url).openConnection(); if (u.getResponseCode() == 200) { u.disconnect(); out.println("ePADD is already running!"); return true; } u.disconnect(); } catch (ConnectException ce) { } out.println("Good, ePADD is not already running"); return false; } private static boolean killRunningServer(String url) throws IOException { try { // attempt to fetch the page // throws a connect exception if the server is not even running // so catch it and return false // String http = url + "exit.jsp?message=Shutdown%20request%20from%20a%20different%20instance%20of%20ePADD"; // version num spaces and brackets screw up the URL connection // actually this should not be a HTTP connection, it can be simply any connection out.println("Sending a kill request to " + url); HttpURLConnection u = (HttpURLConnection) new URL(url).openConnection(); u.connect(); if (u.getResponseCode() == 200) { u.disconnect(); return true; } u.disconnect(); } catch (ConnectException ce) { err.println("Warning: unable to kill running server: " + ce); } return false; } /** waits till the page at the given url is alive, subject to timeout * returns true if the page is alive. * false if the page is not alive at the timeout */ private static boolean waitTillPageAlive(String url, int timeoutSecs) throws IOException { int tries = 0; int secsBetweenTries = 1; while (true) { boolean alive = isURLAlive(url); tries++; if (alive) break; out.println("Web app not deployed after " + tries + " tries"); try { Thread.sleep(secsBetweenTries * 1000); } catch (InterruptedException ie) { } if (tries * secsBetweenTries > timeoutSecs) { out.println("\n\n\nSORRY! FAILED TO START CORRECTLY AFTER " + tries + " TRIES!\n\n\n"); return false; } } out.println("The ePADD web application was deployed successfully (#tries: " + tries + ")"); return true; } /** warns in a way that forces the user to notice (hopefully) */ public static void aggressiveWarn(String message, long sleepMillis) { out.println("\n\n\n\n\n"); out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"); out.println("\n\n\n\n\n\n" + message + "\n\n\n\n\n\n"); out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"); out.println("\n\n\n\n\n"); if (sleepMillis > 0) try { Thread.sleep(sleepMillis); } catch (Exception e) { } } private static Options getOpt() { // create the Options // consider a local vs. global (hosted) switch. some settings will be disabled if its in global mode Options options = new Options(); options.addOption("h", "help", false, "print this message"); options.addOption("p", "port", true, "port number"); options.addOption("d", "debug", false, "turn debug messages on"); options.addOption("df", "debug-fine", false, "turn detailed debug messages on (can result in very large logs!)"); options.addOption("dab", "debug-address-book", false, "turn debug messages on for address book"); options.addOption("dg", "debug-groups", false, "turn debug messages on for groups"); options.addOption("sp", "start-page", true, "start page"); options.addOption("n", "no-browser-open", false, "no browser open"); options.addOption("t", "test", false, "run self tests (<HOME_DIR>/epadd.test.properties should be configured)"); // options.addOption( "ns", "no-shutdown", false, "no auto shutdown"); return options; } private static void launchBrowser(String url) throws BrowserLaunchingInitializingException, UnsupportedOperatingSystemException, IOException, URISyntaxException { // we use the browser launcher only for windows to try and skip IE if (System.getProperty("os.name").toLowerCase().indexOf("windows") >= 0) { launcher = new BrowserLauncher(); List<String> browsers = (List<String>) launcher.getBrowserList(); out.print("The available browsers on this system are: "); // the preferred browser is the first browser, that is not IE. for (String str : browsers) { out.print(str + " "); if (preferredBrowser == null && !"IE".equals(str)) preferredBrowser = str; } out.println(); launcher.setNewWindowPolicy(true); // force new window tellUser("Launching URL in browser: " + url); if (preferredBrowser != null) launcher.openURLinBrowser(url); else launcher.openURLinBrowser(preferredBrowser, url); } else { out.println("Using Java Desktop launcher to browse to " + url); if (desktop != null) // just defensive in case the desktop is not there (maybe in discovery mode?) desktop.browse(new java.net.URI(url)); } } /** sets up SETTINGS_DIR by reading epadd.properties in home dir if required, also sets up IS_DISCOVERY_MODE. * out and err streams are expected to be available. * call this before setting up logging because it can affect the location of the log file */ private static void readConfigFile() { // compute settings_DIR, which is also used as logging_dir. so it should be called before logging is set up. // Important: this logic should be the same as in EpaddInitializer inside the webapp (which calls muse/Config.java) { String DEFAULT_SETTINGS_DIR = System.getProperty("user.home") + File.separator + "epadd-settings"; Properties props = new Properties(); File f = new File(EPADD_PROPS_FILE); if (f.exists() && f.canRead()) { out.println("Reading configuration from: " + EPADD_PROPS_FILE); try { InputStream is = new FileInputStream(EPADD_PROPS_FILE); props.load(is); } catch (Exception e) { err.println("Error reading epadd properties file " + EPADD_PROPS_FILE + " " + e); } } else { err.println("ePADD properties file " + EPADD_PROPS_FILE + " does not exist or is not readable"); } // set up settings_dir SETTINGS_DIR = System.getProperty("epadd.settings.dir"); if (SETTINGS_DIR == null || SETTINGS_DIR.length() == 0) SETTINGS_DIR = props.getProperty("epadd.settings.dir"); if (SETTINGS_DIR == null || SETTINGS_DIR.length() == 0) SETTINGS_DIR = DEFAULT_SETTINGS_DIR; if (System.getProperty("epadd.mode.discovery") != null || "discovery".equalsIgnoreCase((String) props.get("epadd.mode"))) IS_DISCOVERY_MODE = true; } } /* sets out and err to point to the launcher log files (in the settings_dir) */ private static void setupLoggingForLauncher() { String logFile = SETTINGS_DIR + File.separatorChar + "epadd.log"; String launcherLogFile = SETTINGS_DIR + File.separatorChar + "epadd-launcher.log"; String launcherLogFileErr = SETTINGS_DIR + File.separatorChar + "epadd-launcher.err.log"; new File(SETTINGS_DIR).mkdirs(); System.setProperty("muse.log", logFile); System.out.println("Set logging to " + logFile); try { out = new PrintStream(new FileOutputStream(launcherLogFile), true /* autoFlush */, "UTF-8"); err = new PrintStream(new FileOutputStream(launcherLogFileErr), true /* autoFlush */, "UTF-8"); } catch (Exception e) { out = System.out; err = System.err; // reset them back System.err.println("Error redirecting out and err streams to " + launcherLogFile); e.printStackTrace(System.err); } } private static void parseOptions(String[] args) throws ParseException { // set javawebstart.version to a dummy value if not already set (might happen when running with java -jar from cmd line) // exit.jsp doesn't allow us to showdown unless this prop is set if (System.getProperty("javawebstart.version") == null) System.setProperty("javawebstart.version", "UNKNOWN"); if (args.length > 0) { out.print(args.length + " argument(s): "); for (int i = 0; i < args.length; i++) out.print(args[i] + " "); out.println(); } Options options = getOpt(); CommandLineParser parser = new PosixParser(); CommandLine cmd = parser.parse(options, args); if (cmd.hasOption("help")) { HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("ePADD batch mode", options); return; } debug = false; if (cmd.hasOption("debug")) { URL url = ClassLoader.getSystemResource("log4j.properties.debug"); out.println("Loading logging configuration from url: " + url); PropertyConfigurator.configure(url); debug = true; } else if (cmd.hasOption("debug-address-book")) { URL url = ClassLoader.getSystemResource("log4j.properties.debug.ab"); out.println("Loading logging configuration from url: " + url); PropertyConfigurator.configure(url); debug = false; } else if (cmd.hasOption("debug-groups")) { URL url = ClassLoader.getSystemResource("log4j.properties.debug.groups"); out.println("Loading logging configuration from url: " + url); PropertyConfigurator.configure(url); debug = false; } if (cmd.hasOption("no-browser-open") || System.getProperty("nobrowseropen") != null) browserOpen = false; if (cmd.hasOption("port")) { String portStr = cmd.getOptionValue('p'); try { PORT = Integer.parseInt(portStr); String mesg = " Running on port: " + PORT; out.println(mesg); } catch (NumberFormatException nfe) { out.println("invalid port number " + portStr); } } if (cmd.hasOption("start-page")) startPage = cmd.getOptionValue("start-page"); /* if (!cmd.hasOption("no-shutdown")) { // arrange to kill Muse after a period of time, we don't want the server to run forever // i clearly have too much time on my hands right now... long secs = KILL_AFTER_MILLIS/1000; long hh = secs/3600; long mm = (secs%3600)/60; long ss = secs % (60); out.print ("ePADD will shut down automatically after "); if (hh != 0) out.print (hh + " hours "); if (mm != 0 || (hh != 0 && ss != 0)) out.print (mm + " minutes"); if (ss != 0) out.print (ss + " seconds"); out.println(); Timer timer = new Timer(); TimerTask tt = new ShutdownTimerTask(); timer.schedule (tt, KILL_AFTER_MILLIS); } */ System.setSecurityManager(null); // this is important } /** unpack files needed from epadd-standalone.jar (epadd.war, crossdomain.xml and index.html) into tmp directories and point the server to them */ private static void setupTomcatServer() throws IOException, ServletException { System.setProperty("muse.container", "tomcat"); out.println("Setting up ePADD at time " + formatDateLong(new GregorianCalendar())); out.println("Setting up Tomcat"); String tmp = System.getProperty("java.io.tmpdir"); String baseDir = tmp + File.separator + "epadd" + File.separator; // everything we do will be under this directory... don't touch anything else // create webapp and work folders { // create the webapps dir under tmpdir, otherwise we see a disturbing error message, it creates a local tomcat.9099 dir for deployment etc. // debugFile = tmp + File.separatorChar + "debug.txt"; // important: need to first clear the webapps and work dirs, otherwise it sometimes picks up a previous version of the war String webappsDir = baseDir + "webapps" + File.separator; err.println("base dir: " + baseDir); err.println("tmp: " + tmp); err.println("webapps dir: " + webappsDir); File webappsDirFile = new File(webappsDir); if (webappsDirFile.exists()) { out.println("Clearing Tomcat webapps dir: " + webappsDir); FileUtils.deleteDirectory(webappsDirFile); out.println("Done Tomcat clearing webapps dir: " + webappsDir); } new File(webappsDir).mkdirs(); out.println("Created webapps folder at " + webappsDir); String workDir = baseDir + "work" + File.separator; File workDirFile = new File(workDir); if (workDirFile.exists()) { out.println("Clearing Tomcat work dir: " + workDir); FileUtils.deleteDirectory(workDirFile); out.println("Done clearing Tomcat work dir: " + workDir); } new File(workDir).mkdirs(); out.println("Created work folder at " + workDir); } server = new Tomcat(); server.setPort(PORT); server.setBaseDir(baseDir); out.println("Server basedir set to " + baseDir); EPADD_WEBAPP = null; try { // deploy epadd-setting, crossdomain.xml and index.html and epadd.war at their respective paths in the server //deploy epadd-settings to home folder if not present there (or should we copy it always?) { final URL epaddsetting = ePADD.class.getClassLoader().getResource("epadd-settings"); if (epaddsetting == null) { System.out.println("Sorry! Unable to locate epadd-settings on classpath: "); throw new RuntimeException("Sorry! Unable to locate epadd-settings on classpath: "); } String epaddsettingdir = epaddsetting.getPath(); //destination is user.home.. String destpath = System.getProperty("user.home") + File.separator + "epadd-settings"; //if destpath exists then no need to copy else copy to System.getProperty("user.home") path copyResourcesRecursively("epadd-settings", destpath); /* if(!new File(destpath).exists()){ System.out.println("Copying epadd-settings to home folder"); }else{ System.out.println("epadd-settings folder is present in home folder. Skip copying again"); } */ } // context for / { // new directory to hold files that should be accessible with the path / under the server String tmpResourceDir = baseDir + File.separator + "ePADD-crossdomain-xml" + File.separatorChar; new File(tmpResourceDir).mkdirs(); if (!IS_DISCOVERY_MODE) copyResource("crossdomain.xml", tmpResourceDir); // crossdomain.xml is not present in discovery mode since there are no attachments copyResource("index.html", tmpResourceDir); server.addWebapp("/", new File(tmpResourceDir).getAbsolutePath()); // See http://grokbase.com/t/tomcat/users/131xsqrrm2/embedded-tomcat-how-to-use-addcontext-for-docbase } // context for /epadd copyResource("epadd.war", baseDir); // extract from standalone.jar to baseDir EPADD_WEBAPP = server.addWebapp("/" + WEBAPP_NAME, baseDir + "epadd.war"); // deploy basedir/webapp.war to /webapp in tomcat // copyResource ("web.xml", baseDir); // EPADD_WEBAPP.setAltDDName(baseDir + File.separator + "web.xml"); } catch (Exception e) { out.println("Could not copy resources to deploy epadd! " + e); } if (EPADD_WEBAPP == null) { out.println("Aborting... no epadd webapp"); } else { out.println("Deployed webapp to /" + WEBAPP_NAME); out.println("ePADD running check URL is " + APP_CHECK_URL); } // Note: touch the connector only after setting the base dir and other setting params above, else the none of the settings would work // On Terry's archive, to update the correspondents list, we need a cushion of 10MB post size server.getConnector().setMaxPostSize(10000000); } private static void shutdownSessions() { out.println("shutting down sessions..."); Session[] sessions = EPADD_WEBAPP.getManager().findSessions(); for (Session session : sessions) { if (session instanceof HttpSession) try { ((HttpSession) session).invalidate(); out.println("Successfully shut down session: " + session); } catch (Exception e) { out.println("Exception " + e + " while shutting down session " + session); } } } /** we need a system tray icon for management. * http://docs.oracle.com/javase/6/docs/api/java/awt/SystemTray.html */ public static void setupSystemTrayIcon() { // Set the app name in the menu bar for mac. // c.f. http://stackoverflow.com/questions/8918826/java-os-x-lion-set-application-name-doesnt-work System.setProperty("apple.laf.useScreenMenuBar", "true"); System.setProperty("com.apple.mrj.application.apple.menu.about.name", "ePADD"); try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { throw new RuntimeException(e); } TrayIcon trayIcon = null; if (SystemTray.isSupported()) { tellUser("Adding ePADD to the system tray"); SystemTray tray = SystemTray.getSystemTray(); URL u = ePADD.class.getClassLoader().getResource("muse-icon.png"); // note: this better be 16x16, Windows doesn't resize! Mac os does. out.println("ePADD icon resource is " + u); Image image = Toolkit.getDefaultToolkit().getImage(u); out.println("Image = " + image); // create menu items and their listeners ActionListener openMuseControlsListener = new ActionListener() { public void actionPerformed(ActionEvent e) { try { launchBrowser(BASE_URL); // no + "info" for epadd like in muse } catch (Exception e1) { e1.printStackTrace(); } } }; ActionListener QuitMuseListener = new ActionListener() { public void actionPerformed(ActionEvent e) { out.println("*** Received quit from system tray. Stopping the Tomcat embedded web server."); try { shutdownSessions(); server.stop(); } catch (Exception ex) { throw new RuntimeException(ex); } System.exit(0); // we need to explicitly system.exit because we now use Swing (due to system tray, etc). } }; // create a popup menu PopupMenu popup = new PopupMenu(); MenuItem defaultItem = new MenuItem("Open ePADD window"); defaultItem.addActionListener(openMuseControlsListener); popup.add(defaultItem); MenuItem quitItem = new MenuItem("Quit ePADD"); quitItem.addActionListener(QuitMuseListener); popup.add(quitItem); /// ... add other items // construct a TrayIcon String message = "ePADD menu"; // on windows - the tray menu is a little non-intuitive, needs a right click (plain click seems unused) if (System.getProperty("os.name").toLowerCase().indexOf("windows") >= 0) message = "Right click for ePADD menu"; trayIcon = new TrayIcon(image, message, popup); System.out.println("tray Icon = " + trayIcon); // set the TrayIcon properties // trayIcon.addActionListener(openMuseControlsListener); try { tray.add(trayIcon); } catch (AWTException e) { out.println(e); } // ... } else { // disable tray option in your application or // perform other actions // ... } System.out.println("Done!"); // ... // some time later // the application state has changed - update the image if (trayIcon != null) { // trayIcon.setImage(updatedImage); } // ... } public static String getMemoryStats() { Runtime r = Runtime.getRuntime(); System.gc(); return r.freeMemory() / MB + " MB free, " + (r.totalMemory() / MB - r.freeMemory() / MB) + " MB used, " + r.maxMemory() / MB + " MB max, " + r.totalMemory() / MB + " MB total"; } public static String formatDateLong(Calendar d) { if (d == null) return "??-??"; else return d.get(Calendar.YEAR) + "-" + String.format("%02d", (1 + d.get(Calendar.MONTH))) + "-" + String.format("%02d", d.get(Calendar.DAY_OF_MONTH)) + " " + String.format("%02d", d.get(Calendar.HOUR_OF_DAY)) + ":" + String.format("%02d", d.get(Calendar.MINUTE)) + ":" + String.format("%02d", d.get(Calendar.SECOND)); } // util methods public static void copy_stream_to_file(InputStream is, String filename) throws IOException { int bufsize = 64 * 1024; BufferedInputStream bis = null; BufferedOutputStream bos = null; try { File f = new File(filename); if (f.exists()) { // out.println ("File " + filename + " exists"); boolean b = f.delete(); // best effort to delete file if it exists. this is because windows often complains about perms if (!b) out.println("Warning: failed to delete " + filename); } bis = new BufferedInputStream(is, bufsize); bos = new BufferedOutputStream(new FileOutputStream(filename), bufsize); byte buf[] = new byte[bufsize]; while (true) { int n = bis.read(buf); if (n <= 0) break; bos.write(buf, 0, n); } } catch (IOException ioe) { out.println("ERROR trying to copy data to file: " + filename + ", forging ahead nevertheless"); } finally { if (bis != null) bis.close(); if (bos != null) bos.close(); } } /** this is a stop tomcat thread to listen to a message on some port -- any message on this port will shut down Muse. * mainly meant so that a new launch of Muse will kill the previously running version. */ static class ShutdownThread extends Thread { static PrintStream out = System.out; private ServerSocket socket; private int shutdownPort; private Tomcat server; public ShutdownThread(Tomcat server, int shutdownPort) { this.server = server; this.shutdownPort = shutdownPort; setDaemon(false); // deliberately make it non-daemon so as to keep this program running. setName("ePADD shutdown thread"); try { socket = new ServerSocket(this.shutdownPort, 1, InetAddress.getByName("127.0.0.1")); } catch (Exception e) { throw new RuntimeException(e); } } @Override public void run() { out.println("*** running tomcat 'stop' thread"); Socket accept; try { accept = socket.accept(); BufferedReader reader = new BufferedReader(new InputStreamReader(accept.getInputStream())); // wait for a readline String line = reader.readLine(); out.println("Received the line: " + line); // any input received, stop the server shutdownSessions(); if (server != null) server.stop(); out.println("*** Stopped the Tomcat embedded web server. received: " + line); accept.close(); socket.close(); System.exit(1); // we need to explicitly system.exit because we now use Swing (due to system tray, etc). } catch (Exception e) { out.println("Error trying to shutdown Tomcat embedded web server gracefully: " + e); e.printStackTrace(out); throw new RuntimeException(e); } } } private static void killExistingEpaddIfRunning(String baseUrl) { APP_CHECK_URL = baseUrl + "js/epadd.js"; // for quick check of existing muse or successful start up. baseUrl may take some time to run and may not always be available now that we set dirAllowed to false and public mode does not serve /muse. // handle frequent error of user trying to launch another server when its already on // server.start() usually takes a few seconds to return // after that it takes a few seconds for the webapp to deploy // ignore any exceptions along the way and assume not if we can't prove it is alive boolean urlAlive = false; try { urlAlive = isURLAlive(APP_CHECK_URL); } catch (Exception e) { out.println("Exception: e"); e.printStackTrace(out); } if (!urlAlive) return; // nothing to do // oh, no... messy job of cleaning up the prev. running epadd. // try to do it by sending it a shutdown message { tellUser("ePADD already running at: " + baseUrl + ", will shut it down!"); try { killRunningServer("http://localhost:" + (PORT + 1) + "/"); } catch (IOException ioe) { err.println("Error trying to kill running ePADD! " + ioe); } int N_KILL_TRIES = 20, N_KILL_PERIOD_MILLIS = 3000; // check every 3 secs 20 times (total 1 minute) for the previous epadd to die // if it doesn't die after a minute, fail for (int i = 0; i < N_KILL_TRIES; i++) { try { Thread.sleep(N_KILL_PERIOD_MILLIS); } catch (InterruptedException ie) { } tellUser("Checking " + APP_CHECK_URL); try { urlAlive = isURLAlive(APP_CHECK_URL); } catch (Exception e) { out.println("Exception: " + e); e.printStackTrace(out); } if (!urlAlive) break; } if (!urlAlive) { tellUser("Good. Shutdown succeeded, we'll restart ePADD."); } else { String message = "Previously running ePADD still alive despite attempt to shut it down, disabling fresh restart!\n"; message += "If you just want to use the previous instance of ePADD, please go to " + baseUrl; message += "\nTo kill this instance, please go to your computer's task manager and kill running java or javaw processes.\nThen try launching ePADD again.\n"; aggressiveWarn(message, 2000); tellUser("Sorry, unable to kill previous ePADD. Quitting!"); try { Thread.sleep(10000); } catch (InterruptedException ie) { } if (SPLASH != null) SPLASH.close(); return; } } } public static void main(String args[]) throws Exception { if (args.length > 0 && "--test".equals(args[0])) { try { Tester.main(args); } catch (Exception e) { err.println("Exception running self-test: " + e); System.exit(1); } System.exit(0); } readConfigFile(); // should be read first because it reads epadd mode etc. // IS_DISCOVERY_MODE should be set up here if (!IS_DISCOVERY_MODE) SPLASH = new Splash(); else { System.out.println("epadd running in headless discovery mode!"); browserOpen = false; } tellUser("Setting up logging..."); setupLoggingForLauncher(); parseOptions(args); BASE_URL = "http://localhost:" + PORT + "/" + WEBAPP_NAME + "/"; // tellUser (splash, "Log file: " + debugFile + "***\n"); System.out.println("Starting up ePADD on the local computer at " + BASE_URL + ", " + formatDateLong(new GregorianCalendar())); // out.println ("***For troubleshooting information, see this file: " + debugFile + "***\n"); out.println("Current directory = " + System.getProperty("user.dir") + ", home directory = " + System.getProperty("user.home")); out.println("Memory status at the beginning: " + getMemoryStats()); if (Runtime.getRuntime().maxMemory() / MB < 512) // user probably forgot to run with -Xmx aggressiveWarn( "You are probably running ePADD without enough memory. \nIf you launched ePADD from the command line, you can increase memory with an option like java -Xmx4g", 2000); tellUser("Memory: " + getMemoryStats()); killExistingEpaddIfRunning(BASE_URL); tellUser("Starting ePADD at " + BASE_URL); setupTomcatServer(); server.start(); /* PrintStream debugOut1 = err; try { File f = new File(debugFile); if (f.exists()) f.delete(); // particular problem on windows :-( debugOut1 = new PrintStream(new FileOutputStream(debugFile), false, "UTF-8"); } catch (IOException ioe) { out.println ("Warning: failed to delete debug file " + debugFile + " : " + ioe); } final PrintStream debugOut = debugOut1; */ boolean success = waitTillPageAlive(APP_CHECK_URL, TIMEOUT_SECS); if (success) { try { // set it up so as to save sessions before exiting Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() { public void run() { try { shutdownSessions(); server.stop(); server.destroy(); // debugOut.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } })); // start a listener for the shutdown port int shutdownPort = PORT + 1; // shut down port is arbitrarily set to PORT+1. it is ASSUMED to be free. new ShutdownThread(server, shutdownPort).start(); // this will start a non-daemon thread that keeps the process alive tellUser("Listening for ePADD shutdown message on port " + shutdownPort); } catch (Exception e) { out.println( "Unable to start shutdown listener, you will have to stop the server manually using Cmd-Q on Mac OS or kill javaw processes on Windows"); } try { setupSystemTrayIcon(); } catch (Exception e) { out.println("Unable to setup system tray icon: " + e); e.printStackTrace(err); } // open browser window if (browserOpen) { preferredBrowser = null; // launch a browser here try { launchBrowser(BASE_URL); } catch (Exception e) { out.println( "Warning: Unable to launch browser due to exception (use the -n option to prevent ePADD from trying to launch a browser):"); e.printStackTrace(out); } } } else { tellUser("SORRY!!! UNABLE TO START EPADD, EXITING"); } if (SPLASH != null) SPLASH.close(); // program should not halt here, as ShutdownThread is running as a non-daemon thread. // splashDemo.closeWindow(); } }