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.jvmstat.perfdata.monitor.protocol.rmi; |
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27 |
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28 import java.util.*; |
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29 import java.util.regex.*; |
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30 import java.io.*; |
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31 import java.rmi.RemoteException; |
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32 import sun.jvmstat.monitor.*; |
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33 import sun.jvmstat.monitor.event.*; |
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34 import sun.jvmstat.monitor.remote.*; |
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35 |
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36 /** |
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37 * Class for managing the RemoteMonitoredVm instances on a remote system. |
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38 * <p> |
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39 * This class is responsible for the mechanism that detects the active |
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40 * HotSpot Java Virtual Machines on the remote host and possibly for a |
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41 * specific user. The ability to detect all possible HotSpot Java Virtual |
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42 * Machines on the remote host may be limited by the permissions of the |
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43 * principal running the RMI server application on the remote host. |
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44 * |
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45 * @author Brian Doherty |
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46 * @since 1.5 |
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47 */ |
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48 public class RemoteVmManager { |
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49 |
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50 private RemoteHost remoteHost; |
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51 private String user; |
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52 |
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53 /** |
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54 * Creates a RemoteVmManager instance for the remote system. |
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55 * <p> |
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56 * Manages RemoteMonitordVm instances for which the principal |
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57 * running the remote server has appropriate permissions. |
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58 * |
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59 * @param remoteHost the remote proxy object to the RMI server on |
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60 * the remote system. |
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61 */ |
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62 public RemoteVmManager(RemoteHost remoteHost) { |
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63 this(remoteHost, null); |
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64 } |
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65 |
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66 /** |
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67 * Creates a RemoteVmManager instance for the given user. |
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68 * <p> |
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69 * Manages RemoteMonitoredVm instances for all remote Java Virtual |
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70 * machines owned by the specified user on the remote system. The |
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71 * RMI server on the remote system must have the appropriate permissions |
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72 * to access the named users Java Virtual Machines. |
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73 * |
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74 * @param remoteHost the remote proxy object to the RMI server on |
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75 * the remote system. |
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76 * @param user the name of the user |
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77 */ |
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78 public RemoteVmManager(RemoteHost remoteHost, String user) { |
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79 this.user = user; |
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80 this.remoteHost = remoteHost; |
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81 } |
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82 |
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83 /** |
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84 * Return the current set of monitorable Java Virtual Machines. |
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85 * <p> |
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86 * The set returned by this method depends on the user name passed |
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87 * to the constructor. If no user name was specified, then this |
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88 * method will return all candidate JVMs on the system. Otherwise, |
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89 * only the JVMs for the given user will be returned. This assumes |
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90 * that the RMI server process has the appropriate permissions to |
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91 * access the target set of JVMs. |
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92 * |
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93 * @return Set - the Set of monitorable Java Virtual Machines |
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94 */ |
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95 public Set<Integer> activeVms() throws MonitorException { |
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96 int[] active = null; |
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97 |
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98 try { |
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99 active = remoteHost.activeVms(); |
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100 |
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101 } catch (RemoteException e) { |
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102 throw new MonitorException("Error communicating with remote host: " |
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103 + e.getMessage(), e); |
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104 } |
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105 |
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106 Set<Integer> activeSet = new HashSet<Integer>(active.length); |
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107 |
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108 for (int i = 0; i < active.length; i++) { |
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109 activeSet.add(active[i]); |
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110 } |
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111 |
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112 return activeSet; |
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113 } |
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114 } |
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