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 javax.swing.*; 30 31 @SuppressWarnings("serial") 32 public abstract class Tab extends JPanel { 33 private String name; 34 private Worker worker; 35 36 protected VMPanel vmPanel; 37 38 private SwingWorker<?, ?> prevSW; 39 40 public Tab(VMPanel vmPanel, String name) { 41 this.vmPanel = vmPanel; 42 this.name = name; 43 } 44 45 public SwingWorker<?, ?> newSwingWorker() { 46 return null; 47 } 48 49 public void update() { 50 final ProxyClient proxyClient = vmPanel.getProxyClient(); 51 if (!proxyClient.hasPlatformMXBeans()) { 52 throw new UnsupportedOperationException( 53 "Platform MXBeans not registered in MBeanServer"); 54 } 55 56 SwingWorker<?,?> sw = newSwingWorker(); 57 // schedule SwingWorker to run only if the previous 58 // SwingWorker has finished its task and it hasn't started. 59 if (prevSW == null || prevSW.isDone()) { 60 if (sw == null || sw.getState() == SwingWorker.StateValue.PENDING) { 61 prevSW = sw; 62 if (sw != null) { 63 sw.execute(); 64 } 65 } 66 } 67 } 68 69 public synchronized void dispose() { 70 if(worker != null) 71 worker.stopWorker(); 72 73 // Subclasses will override to clean up 74 } 75 76 protected VMPanel getVMPanel() { 77 return vmPanel; 78 } 79 80 OverviewPanel[] getOverviewPanels() { 81 return null; 82 } 83 84 public synchronized void workerAdd(Runnable job) { 85 if (worker == null) { 86 worker = new Worker(name+"-"+vmPanel.getConnectionName()); 87 worker.start(); 88 } 89 worker.add(job); 90 } 91 92 public Dimension getPreferredSize() { 93 return new Dimension(700, 500); 94 } 95 }