J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.jvmstat.perfdata.monitor.protocol.rmi; |
| 27 | |
| 28 | import java.util.*; |
| 29 | import java.util.regex.*; |
| 30 | import java.io.*; |
| 31 | import java.rmi.RemoteException; |
| 32 | import sun.jvmstat.monitor.*; |
| 33 | import sun.jvmstat.monitor.event.*; |
| 34 | import sun.jvmstat.monitor.remote.*; |
| 35 | |
| 36 | /** |
| 37 | * Class for managing the RemoteMonitoredVm instances on a remote system. |
| 38 | * <p> |
| 39 | * This class is responsible for the mechanism that detects the active |
| 40 | * HotSpot Java Virtual Machines on the remote host and possibly for a |
| 41 | * specific user. The ability to detect all possible HotSpot Java Virtual |
| 42 | * Machines on the remote host may be limited by the permissions of the |
| 43 | * principal running the RMI server application on the remote host. |
| 44 | * |
| 45 | * @author Brian Doherty |
| 46 | * @since 1.5 |
| 47 | */ |
| 48 | public class RemoteVmManager { |
| 49 | |
| 50 | private RemoteHost remoteHost; |
| 51 | private String user; |
| 52 | |
| 53 | /** |
| 54 | * Creates a RemoteVmManager instance for the remote system. |
| 55 | * <p> |
| 56 | * Manages RemoteMonitordVm instances for which the principal |
| 57 | * running the remote server has appropriate permissions. |
| 58 | * |
| 59 | * @param remoteHost the remote proxy object to the RMI server on |
| 60 | * the remote system. |
| 61 | */ |
| 62 | public RemoteVmManager(RemoteHost remoteHost) { |
| 63 | this(remoteHost, null); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Creates a RemoteVmManager instance for the given user. |
| 68 | * <p> |
| 69 | * Manages RemoteMonitoredVm instances for all remote Java Virtual |
| 70 | * machines owned by the specified user on the remote system. The |
| 71 | * RMI server on the remote system must have the appropriate permissions |
| 72 | * to access the named users Java Virtual Machines. |
| 73 | * |
| 74 | * @param remoteHost the remote proxy object to the RMI server on |
| 75 | * the remote system. |
| 76 | * @param user the name of the user |
| 77 | */ |
| 78 | public RemoteVmManager(RemoteHost remoteHost, String user) { |
| 79 | this.user = user; |
| 80 | this.remoteHost = remoteHost; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Return the current set of monitorable Java Virtual Machines. |
| 85 | * <p> |
| 86 | * The set returned by this method depends on the user name passed |
| 87 | * to the constructor. If no user name was specified, then this |
| 88 | * method will return all candidate JVMs on the system. Otherwise, |
| 89 | * only the JVMs for the given user will be returned. This assumes |
| 90 | * that the RMI server process has the appropriate permissions to |
| 91 | * access the target set of JVMs. |
| 92 | * |
| 93 | * @return Set - the Set of monitorable Java Virtual Machines |
| 94 | */ |
| 95 | public Set<Integer> activeVms() throws MonitorException { |
| 96 | int[] active = null; |
| 97 | |
| 98 | try { |
| 99 | active = remoteHost.activeVms(); |
| 100 | |
| 101 | } catch (RemoteException e) { |
| 102 | throw new MonitorException("Error communicating with remote host: " |
| 103 | + e.getMessage(), e); |
| 104 | } |
| 105 | |
| 106 | Set<Integer> activeSet = new HashSet<Integer>(active.length); |
| 107 | |
| 108 | for (int i = 0; i < active.length; i++) { |
| 109 | activeSet.add(new Integer(active[i])); |
| 110 | } |
| 111 | |
| 112 | return activeSet; |
| 113 | } |
| 114 | } |