1 /* |
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2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.tools.jstatd; |
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27 |
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28 import java.util.*; |
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29 import java.nio.*; |
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30 import java.io.*; |
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31 import java.net.*; |
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32 import java.rmi.*; |
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33 import java.rmi.server.*; |
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34 import sun.jvmstat.monitor.*; |
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35 import sun.jvmstat.monitor.event.*; |
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36 import sun.jvmstat.monitor.remote.*; |
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37 |
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38 /** |
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39 * Concrete implementation of the RemoteHost interface for the HotSpot |
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40 * PerfData <em>rmi:</em> protocol. |
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41 * <p> |
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42 * This class provides remote access to the instrumentation exported |
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43 * by HotSpot Java Virtual Machines through the PerfData shared memory |
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44 * interface. |
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45 * |
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46 * @author Brian Doherty |
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47 * @since 1.5 |
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48 */ |
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49 public class RemoteHostImpl implements RemoteHost, HostListener { |
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50 |
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51 private MonitoredHost monitoredHost; |
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52 private Set<Integer> activeVms; |
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53 |
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54 public RemoteHostImpl() throws MonitorException { |
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55 try { |
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56 monitoredHost = MonitoredHost.getMonitoredHost("localhost"); |
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57 } catch (URISyntaxException e) { } |
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58 |
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59 activeVms = monitoredHost.activeVms(); |
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60 monitoredHost.addHostListener(this); |
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61 } |
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62 |
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63 public RemoteVm attachVm(int lvmid, String mode) |
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64 throws RemoteException, MonitorException { |
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65 Integer v = lvmid; |
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66 RemoteVm stub = null; |
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67 StringBuilder sb = new StringBuilder(); |
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68 |
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69 sb.append("local://").append(lvmid).append("@localhost"); |
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70 if (mode != null) { |
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71 sb.append("?mode=").append(mode); |
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72 } |
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73 |
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74 String vmidStr = sb.toString(); |
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75 |
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76 try { |
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77 VmIdentifier vmid = new VmIdentifier(vmidStr); |
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78 MonitoredVm mvm = monitoredHost.getMonitoredVm(vmid); |
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79 RemoteVmImpl rvm = new RemoteVmImpl((BufferedMonitoredVm)mvm); |
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80 stub = (RemoteVm) UnicastRemoteObject.exportObject(rvm, 0); |
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81 } |
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82 catch (URISyntaxException e) { |
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83 throw new RuntimeException("Malformed VmIdentifier URI: " |
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84 + vmidStr, e); |
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85 } |
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86 return stub; |
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87 } |
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88 |
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89 public void detachVm(RemoteVm rvm) throws RemoteException { |
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90 rvm.detach(); |
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91 } |
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92 |
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93 public int[] activeVms() throws MonitorException { |
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94 Object[] vms = null; |
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95 int[] vmids = null; |
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96 |
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97 vms = monitoredHost.activeVms().toArray(); |
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98 vmids = new int[vms.length]; |
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99 |
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100 for (int i = 0; i < vmids.length; i++) { |
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101 vmids[i] = ((Integer)vms[i]).intValue(); |
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102 } |
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103 return vmids; |
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104 } |
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105 |
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106 public void vmStatusChanged(VmStatusChangeEvent ev) { |
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107 synchronized(this.activeVms) { |
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108 activeVms.retainAll(ev.getActive()); |
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109 } |
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110 } |
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111 |
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112 public void disconnected(HostEvent ev) { |
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113 // we only monitor the local host, so this event shouldn't occur. |
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114 } |
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115 } |
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