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| 1 | +/* | |
| 2 | + * Copyright (c) 2004, 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.jstatd; | |
| 27 | + | |
| 28 | +import java.util.*; | |
| 29 | +import java.nio.*; | |
| 30 | +import java.io.*; | |
| 31 | +import java.net.*; | |
| 32 | +import java.rmi.*; | |
| 33 | +import java.rmi.server.*; | |
| 34 | +import sun.jvmstat.monitor.*; | |
| 35 | +import sun.jvmstat.monitor.event.*; | |
| 36 | +import sun.jvmstat.monitor.remote.*; | |
| 37 | + | |
| 38 | +/** | |
| 39 | + * Concrete implementation of the RemoteHost interface for the HotSpot | |
| 40 | + * PerfData <em>rmi:</em> protocol. | |
| 41 | + * <p> | |
| 42 | + * This class provides remote access to the instrumentation exported | |
| 43 | + * by HotSpot Java Virtual Machines through the PerfData shared memory | |
| 44 | + * interface. | |
| 45 | + * | |
| 46 | + * @author Brian Doherty | |
| 47 | + * @since 1.5 | |
| 48 | + */ | |
| 49 | +public class RemoteHostImpl implements RemoteHost, HostListener { | |
| 50 | + | |
| 51 | + private MonitoredHost monitoredHost; | |
| 52 | + private Set<Integer> activeVms; | |
| 53 | + | |
| 54 | + public RemoteHostImpl() throws MonitorException { | |
| 55 | + try { | |
| 56 | + monitoredHost = MonitoredHost.getMonitoredHost("localhost"); | |
| 57 | + } catch (URISyntaxException e) { } | |
| 58 | + | |
| 59 | + activeVms = monitoredHost.activeVms(); | |
| 60 | + monitoredHost.addHostListener(this); | |
| 61 | + } | |
| 62 | + | |
| 63 | + public RemoteVm attachVm(int lvmid, String mode) | |
| 64 | + throws RemoteException, MonitorException { | |
| 65 | + Integer v = new Integer(lvmid); | |
| 66 | + RemoteVm stub = null; | |
| 67 | + StringBuffer sb = new StringBuffer(); | |
| 68 | + | |
| 69 | + sb.append("local://").append(lvmid).append("@localhost"); | |
| 70 | + if (mode != null) { | |
| 71 | + sb.append("?mode=" + mode); | |
| 72 | + } | |
| 73 | + | |
| 74 | + String vmidStr = sb.toString(); | |
| 75 | + | |
| 76 | + try { | |
| 77 | + VmIdentifier vmid = new VmIdentifier(vmidStr); | |
| 78 | + MonitoredVm mvm = monitoredHost.getMonitoredVm(vmid); | |
| 79 | + RemoteVmImpl rvm = new RemoteVmImpl((BufferedMonitoredVm)mvm); | |
| 80 | + stub = (RemoteVm) UnicastRemoteObject.exportObject(rvm, 0); | |
| 81 | + } | |
| 82 | + catch (URISyntaxException e) { | |
| 83 | + throw new RuntimeException("Malformed VmIdentifier URI: " | |
| 84 | + + vmidStr, e); | |
| 85 | + } | |
| 86 | + return stub; | |
| 87 | + } | |
| 88 | + | |
| 89 | + public void detachVm(RemoteVm rvm) throws RemoteException { | |
| 90 | + rvm.detach(); | |
| 91 | + } | |
| 92 | + | |
| 93 | + public int[] activeVms() throws MonitorException { | |
| 94 | + Object[] vms = null; | |
| 95 | + int[] vmids = null; | |
| 96 | + | |
| 97 | + vms = monitoredHost.activeVms().toArray(); | |
| 98 | + vmids = new int[vms.length]; | |
| 99 | + | |
| 100 | + for (int i = 0; i < vmids.length; i++) { | |
| 101 | + vmids[i] = ((Integer)vms[i]).intValue(); | |
| 102 | + } | |
| 103 | + return vmids; | |
| 104 | + } | |
| 105 | + | |
| 106 | + public void vmStatusChanged(VmStatusChangeEvent ev) { | |
| 107 | + synchronized(this.activeVms) { | |
| 108 | + activeVms.retainAll(ev.getActive()); | |
| 109 | + } | |
| 110 | + } | |
| 111 | + | |
| 112 | + public void disconnected(HostEvent ev) { | |
| 113 | + // we only monitor the local host, so this event shouldn't occur. | |
| 114 | + } | |
| 115 | +} | |