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	/*
	* Copyright (c) 2005, 2014, 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
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.tools.jconsole;

	import java.util.*;
	import java.io.IOException;
	import java.io.File;

	// Sun specific
	import com.sun.tools.attach.VirtualMachine;
	import com.sun.tools.attach.VirtualMachineDescriptor;
	import com.sun.tools.attach.AttachNotSupportedException;

	// Sun private
	import sun.management.ConnectorAddressLink;
	import sun.jvmstat.monitor.HostIdentifier;
	import sun.jvmstat.monitor.MonitoredHost;
	import sun.jvmstat.monitor.MonitoredVm;
	import sun.jvmstat.monitor.MonitoredVmUtil;
	import sun.jvmstat.monitor.MonitorException;
	import sun.jvmstat.monitor.VmIdentifier;

	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<Integer> vms;
	try {
	host = MonitoredHost.getMonitoredHost(new HostIdentifier((String)null));
	vms = host.activeVms();
	} catch (java.net.URISyntaxException \| MonitorException x) {
	throw new InternalError(x.getMessage(), x);
	}
	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
	if (JConsole.isDebug()) {
	x.printStackTrace();
	}
	} catch (IOException x) {
	// ignore
	if (JConsole.isDebug()) {
	x.printStackTrace();
	}
	}
	}
	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;
	}

	vm.startLocalManagementAgent();

	// get the connector address
	Properties agentProps = vm.getAgentProperties();
	address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);

	vm.detach();
	}
	}

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