1 /* 2 * Copyright (c) 2004, 2006, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.tools.jconsole; 27 28 import java.awt.*; 29 import java.awt.event.*; 30 import java.beans.*; 31 32 import javax.swing.*; 33 34 public abstract class Tab extends JPanel { 35 private String name; 36 private Worker worker; 37 38 protected VMPanel vmPanel; 39 40 private SwingWorker<?, ?> prevSW; 41 42 public Tab(VMPanel vmPanel, String name) { 43 this.vmPanel = vmPanel; 44 this.name = name; 45 } 46 47 public SwingWorker<?, ?> newSwingWorker() { 48 return null; 49 } 50 51 public void update() { 52 final ProxyClient proxyClient = vmPanel.getProxyClient(); 53 if (!proxyClient.hasPlatformMXBeans()) { 54 throw new UnsupportedOperationException( 55 "Platform MXBeans not registered in MBeanServer"); 56 } 57 58 SwingWorker<?,?> sw = newSwingWorker(); 59 // schedule SwingWorker to run only if the previous 60 // SwingWorker has finished its task and it hasn't started. 61 if (prevSW == null || prevSW.isDone()) { 62 if (sw == null || sw.getState() == SwingWorker.StateValue.PENDING) { 63 prevSW = sw; 64 if (sw != null) { 65 sw.execute(); 66 } 67 } 68 } 69 } 70 71 public synchronized void dispose() { 72 if(worker != null) 73 worker.stopWorker(); 74 75 // Subclasses will override to clean up 76 } 77 78 protected VMPanel getVMPanel() { 79 return vmPanel; 80 } 81 82 OverviewPanel[] getOverviewPanels() { 83 return null; 84 } 85 86 public synchronized void workerAdd(Runnable job) { 87 if (worker == null) { 88 worker = new Worker(name+"-"+vmPanel.getConnectionName()); 89 worker.start(); 90 } 91 worker.add(job); 92 } 93 94 public Dimension getPreferredSize() { 95 return new Dimension(700, 500); 96 } 97 }