Launcher: Use Java 6 SwingWorker instead of "Version 3 SwingWorker".

There was an old backport of SwingWorker for JDK < 6 from 2003, which was known as "SwingWorker Version 3".
Openfire does not need such old backports anymore.

src/java/org/jivesoftware/openfire/launcher/Launcher.java

@@ -63,6 +63,7 @@ import javax.swing.JPanel;
 import javax.swing.JProgressBar;
 import javax.swing.JScrollPane;
 import javax.swing.JTextPane;
+import javax.swing.SwingWorker;
 import javax.swing.UIManager;
 import javax.swing.text.BadLocationException;
 import javax.swing.text.SimpleAttributeSet;
@@ -457,9 +458,9 @@ public class Launcher {
             }
 
             final SimpleAttributeSet styles = new SimpleAttributeSet();
-            SwingWorker inputWorker = new SwingWorker() {
+            SwingWorker<String, Void> inputWorker = new SwingWorker<String, Void>() {
                 @Override
-				public Object construct() {
+				public String doInBackground() {
                     if (openfired != null) {
                         // Get the input stream and read from it
                         try (InputStream in = openfired.getInputStream()) {
@@ -482,12 +483,12 @@ public class Launcher {
                     return "ok";
                 }
             };
-            inputWorker.start();
+            inputWorker.execute();
 
 
-            SwingWorker errorWorker = new SwingWorker() {
+            SwingWorker<String, Void> errorWorker = new SwingWorker<String, Void>() {
                 @Override
-				public Object construct() {
+				public String doInBackground() {
                     if (openfired != null) {
                         // Get the input stream and read from it
                         try (InputStream in = openfired.getErrorStream()) {
@@ -509,7 +510,7 @@ public class Launcher {
                     return "ok";
                 }
             };
-            errorWorker.start();
+            errorWorker.execute();
 
             if (freshStart) {
                 try {
@@ -589,8 +590,7 @@ public class Launcher {
             }
             if ("-1".equals(port)) {
                 BrowserLauncher.openURL("https://127.0.0.1:" + securePort + "/index.html");
-            }
-            else {
+            } else {
                 BrowserLauncher.openURL("http://127.0.0.1:" + port + "/index.html");
             }
         }
@@ -612,9 +612,9 @@ public class Launcher {
         dialog.pack();
         dialog.setSize(225, 55);
 
-        final SwingWorker installerThread = new SwingWorker() {
+        final SwingWorker<File, Void> installerThread = new SwingWorker<File, Void>() {
             @Override
-			public Object construct() {
+			public File doInBackground() {
                 File pluginsDir = new File(binDir.getParentFile(), "plugins");
                 String tempName = plugin.getName() + ".part";
                 File tempPluginsFile = new File(pluginsDir, tempName);
@@ -638,13 +638,13 @@ public class Launcher {
             }
 
             @Override
-			public void finished() {
+			public void done() {
                 dialog.setVisible(false);
             }
         };
 
         // Start installation
-        installerThread.start();
+        installerThread.execute();
 
         dialog.setLocationRelativeTo(frame);
         dialog.setVisible(true);

src/java/org/jivesoftware/openfire/launcher/SwingWorker.java

-/**
- * $RCSfile$
- * $Revision: 1094 $
- * $Date: 2005-03-07 04:32:32 -0300 (Mon, 07 Mar 2005) $
- *
- * Copyright (C) 2004-2008 Jive Software. All rights reserved.
- *
- * 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 org.jivesoftware.openfire.launcher;
-
-import javax.swing.SwingUtilities;
-
-/**
- * Modified SwingWorker that actually works.
- * @author Derek DeMoro
- */
-public abstract class SwingWorker {
-    private Object value;  // see getValue(), setValue()
-    private Thread thread;
-
-    /**
-     * Class to maintain reference to current worker thread
-     * under separate synchronization control.
-     */
-    private static class ThreadVar {
-        private Thread thread;
-
-        ThreadVar(Thread t) {
-            thread = t;
-        }
-
-        synchronized Thread get() {
-            return thread;
-        }
-
-        synchronized void clear() {
-            thread = null;
-        }
-    }
-
-    private ThreadVar threadVar;
-
-    /**
-     * Get the value produced by the worker thread, or null if it
-     * hasn't been constructed yet.
-     */
-    protected synchronized Object getValue() {
-        return value;
-    }
-
-    /**
-     * Set the value produced by worker thread
-     */
-    private synchronized void setValue(Object x) {
-        value = x;
-    }
-
-    /**
-     * Compute the value to be returned by the <code>get</code> method.
-     */
-    public abstract Object construct();
-
-    /**
-     * Called on the event dispatching thread (not on the worker thread)
-     * after the <code>construct</code> method has returned.
-     */
-    public void finished() {
-
-    }
-
-    /**
-     * A new method that interrupts the worker thread.  Call this method
-     * to force the worker to stop what it's doing.
-     */
-    public void interrupt() {
-        Thread t = threadVar.get();
-        if (t != null) {
-            t.interrupt();
-        }
-        threadVar.clear();
-    }
-
-
-    /**
-     * Return the value created by the <code>construct</code> method.
-     * Returns null if either the constructing thread or the current
-     * thread was interrupted before a value was produced.
-     *
-     * @return the value created by the <code>construct</code> method
-     */
-    public Object get() {
-        while (true) {
-            Thread t = threadVar.get();
-            if (t == null) {
-                return getValue();
-            }
-            try {
-                t.join();
-            }
-            catch (InterruptedException e) {
-                Thread.currentThread().interrupt(); // propagate
-                return null;
-            }
-        }
-    }
-
-
-    /**
-     * Start a thread that will call the <code>construct</code> method
-     * and then exit.
-     */
-    public SwingWorker() {
-        final Runnable doFinished = new Runnable() {
-            @Override
-            public void run() {
-                finished();
-            }
-        };
-
-        Runnable doConstruct = new Runnable() {
-            @Override
-            public void run() {
-                try {
-                    setValue(construct());
-                }
-                finally {
-                    threadVar.clear();
-                }
-                SwingUtilities.invokeLater(new Runnable() {
-                    @Override
-                    public void run() {
-                        finished();
-                    }
-                });
-
-            }
-        };
-
-        Thread t = new Thread(doConstruct);
-        threadVar = new ThreadVar(t);
-    }
-
-    /**
-     * Start the worker thread.
-     */
-    public void start() {
-        Thread t = threadVar.get();
-        if (t != null) {
-            t.start();
-        }
-    }
-    
-
-}
-