/*
* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.jvmstat.perfdata.monitor.protocol.rmi;
import java.util.*;
import java.util.regex.*;
import java.io.*;
import java.rmi.RemoteException;
import sun.jvmstat.monitor.*;
import sun.jvmstat.monitor.event.*;
import sun.jvmstat.monitor.remote.*;
/**
* Class for managing the RemoteMonitoredVm instances on a remote system.
* <p>
* This class is responsible for the mechanism that detects the active
* HotSpot Java Virtual Machines on the remote host and possibly for a
* specific user. The ability to detect all possible HotSpot Java Virtual
* Machines on the remote host may be limited by the permissions of the
* principal running the RMI server application on the remote host.
*
* @author Brian Doherty
* @since 1.5
*/
public class RemoteVmManager {
private RemoteHost remoteHost;
private String user;
/**
* Creates a RemoteVmManager instance for the remote system.
* <p>
* Manages RemoteMonitordVm instances for which the principal
* running the remote server has appropriate permissions.
*
* @param remoteHost the remote proxy object to the RMI server on
* the remote system.
*/
public RemoteVmManager(RemoteHost remoteHost) {
this(remoteHost, null);
}
/**
* Creates a RemoteVmManager instance for the given user.
* <p>
* Manages RemoteMonitoredVm instances for all remote Java Virtual
* machines owned by the specified user on the remote system. The
* RMI server on the remote system must have the appropriate permissions
* to access the named users Java Virtual Machines.
*
* @param remoteHost the remote proxy object to the RMI server on
* the remote system.
* @param user the name of the user
*/
public RemoteVmManager(RemoteHost remoteHost, String user) {
this.user = user;
this.remoteHost = remoteHost;
}
/**
* Return the current set of monitorable Java Virtual Machines.
* <p>
* The set returned by this method depends on the user name passed
* to the constructor. If no user name was specified, then this
* method will return all candidate JVMs on the system. Otherwise,
* only the JVMs for the given user will be returned. This assumes
* that the RMI server process has the appropriate permissions to
* access the target set of JVMs.
*
* @return Set - the Set of monitorable Java Virtual Machines
*/
public Set<Integer> activeVms() throws MonitorException {
int[] active = null;
try {
active = remoteHost.activeVms();
} catch (RemoteException e) {
throw new MonitorException("Error communicating with remote host: "
+ e.getMessage(), e);
}
Set<Integer> activeSet = new HashSet<Integer>(active.length);
for (int i = 0; i < active.length; i++) {
activeSet.add(new Integer(active[i]));
}
return activeSet;
}
}