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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 | } | ||