/*
* %W% %E%
*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.stephan.tof.jmxmon.jmxutil;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import sun.jvmstat.monitor.HostIdentifier;
import sun.jvmstat.monitor.MonitorException;
import sun.jvmstat.monitor.MonitoredHost;
import sun.jvmstat.monitor.MonitoredVm;
import sun.jvmstat.monitor.MonitoredVmUtil;
import sun.jvmstat.monitor.VmIdentifier;
// Sun private
import sun.management.ConnectorAddressLink;
import com.sun.tools.attach.AgentInitializationException;
import com.sun.tools.attach.AgentLoadException;
import com.sun.tools.attach.AttachNotSupportedException;
// Sun specific
import com.sun.tools.attach.VirtualMachine;
import com.sun.tools.attach.VirtualMachineDescriptor;
public class LocalVirtualMachine {
private String address;
private String commandLine;
private String displayName;
private int vmid;
private boolean isAttachSupported;
public LocalVirtualMachine(int vmid, String commandLine, boolean canAttach, String connectorAddress) {
this.vmid = vmid;
this.commandLine = commandLine;
this.address = connectorAddress;
this.isAttachSupported = canAttach;
this.displayName = getDisplayName(commandLine);
}
private static String getDisplayName(String commandLine) {
// trim the pathname of jar file if it's a jar
String[] res = commandLine.split(" ", 2);
if (res[0].endsWith(".jar")) {
File jarfile = new File(res[0]);
String displayName = jarfile.getName();
if (res.length == 2) {
displayName += " " + res[1];
}
return displayName;
}
return commandLine;
}
public int vmid() {
return vmid;
}
public boolean isManageable() {
return (address != null);
}
public boolean isAttachable() {
return isAttachSupported;
}
public void startManagementAgent() throws IOException {
if (address != null) {
// already started
return;
}
if (!isAttachable()) {
throw new IOException("This virtual machine \"" + vmid +
"\" does not support dynamic attach.");
}
loadManagementAgent();
// fails to load or start the management agent
if (address == null) {
// should never reach here
throw new IOException("Fails to find connector address");
}
}
public String connectorAddress() {
// return null if not available or no JMX agent
return address;
}
public String displayName() {
return displayName;
}
public String toString() {
return commandLine;
}
// This method returns the list of all virtual machines currently
// running on the machine
public static Map<Integer, LocalVirtualMachine> getAllVirtualMachines() {
Map<Integer, LocalVirtualMachine> map =
new HashMap<Integer, LocalVirtualMachine>();
getMonitoredVMs(map);
getAttachableVMs(map);
return map;
}
private static void getMonitoredVMs(Map<Integer, LocalVirtualMachine> map) {
MonitoredHost host;
Set vms;
try {
host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null));
vms = host.activeVms();
} catch (java.net.URISyntaxException sx) {
throw new InternalError(sx.getMessage());
} catch (MonitorException mx) {
throw new InternalError(mx.getMessage());
}
for (Object vmid: vms) {
if (vmid instanceof Integer) {
int pid = ((Integer) vmid).intValue();
String name = vmid.toString(); // default to pid if name not available
boolean attachable = false;
String address = null;
try {
MonitoredVm mvm = host.getMonitoredVm(new VmIdentifier(name));
// use the command line as the display name
name = MonitoredVmUtil.commandLine(mvm);
attachable = MonitoredVmUtil.isAttachable(mvm);
address = ConnectorAddressLink.importFrom(pid);
mvm.detach();
} catch (Exception x) {
// ignore
}
map.put((Integer) vmid,
new LocalVirtualMachine(pid, name, attachable, address));
}
}
}
private static final String LOCAL_CONNECTOR_ADDRESS_PROP =
"com.sun.management.jmxremote.localConnectorAddress";
private static void getAttachableVMs(Map<Integer, LocalVirtualMachine> map) {
List<VirtualMachineDescriptor> vms = VirtualMachine.list();
for (VirtualMachineDescriptor vmd : vms) {
try {
Integer vmid = Integer.valueOf(vmd.id());
if (!map.containsKey(vmid)) {
boolean attachable = false;
String address = null;
try {
VirtualMachine vm = VirtualMachine.attach(vmd);
attachable = true;
Properties agentProps = vm.getAgentProperties();
address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
vm.detach();
} catch (AttachNotSupportedException x) {
// not attachable
} catch (IOException x) {
// ignore
}
map.put(vmid, new LocalVirtualMachine(vmid.intValue(),
vmd.displayName(),
attachable,
address));
}
} catch (NumberFormatException e) {
// do not support vmid different than pid
}
}
}
public static LocalVirtualMachine getLocalVirtualMachine(int vmid) {
Map<Integer, LocalVirtualMachine> map = getAllVirtualMachines();
LocalVirtualMachine lvm = map.get(vmid);
if (lvm == null) {
// Check if the VM is attachable but not included in the list
// if it's running with a different security context.
// For example, Windows services running
// local SYSTEM account are attachable if you have Adminstrator
// privileges.
boolean attachable = false;
String address = null;
String name = String.valueOf(vmid); // default display name to pid
try {
VirtualMachine vm = VirtualMachine.attach(name);
attachable = true;
Properties agentProps = vm.getAgentProperties();
address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
vm.detach();
lvm = new LocalVirtualMachine(vmid, name, attachable, address);
} catch (AttachNotSupportedException x) {
// not attachable
throw new IllegalStateException(x);
} catch (IOException x) {
// ignore
throw new IllegalStateException(x);
}
}
return lvm;
}
// load the management agent into the target VM
private void loadManagementAgent() throws IOException {
VirtualMachine vm = null;
String name = String.valueOf(vmid);
try {
vm = VirtualMachine.attach(name);
} catch (AttachNotSupportedException x) {
IOException ioe = new IOException(x.getMessage());
ioe.initCause(x);
throw ioe;
}
String home = vm.getSystemProperties().getProperty("java.home");
// Normally in ${java.home}/jre/lib/management-agent.jar but might
// be in ${java.home}/lib in build environments.
String agent = home + File.separator + "jre" + File.separator +
"lib" + File.separator + "management-agent.jar";
File f = new File(agent);
if (!f.exists()) {
agent = home + File.separator + "lib" + File.separator +
"management-agent.jar";
f = new File(agent);
if (!f.exists()) {
throw new IOException("Management agent not found");
}
}
agent = f.getCanonicalPath();
try {
vm.loadAgent(agent, "com.sun.management.jmxremote");
} catch (AgentLoadException x) {
IOException ioe = new IOException(x.getMessage());
ioe.initCause(x);
throw ioe;
} catch (AgentInitializationException x) {
IOException ioe = new IOException(x.getMessage());
ioe.initCause(x);
throw ioe;
}
// get the connector address
Properties agentProps = vm.getAgentProperties();
address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
vm.detach();
}
}
