/*
* 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.tools.jstat;
import java.util.*;
import sun.jvmstat.monitor.*;
import sun.jvmstat.monitor.event.*;
import sun.management.counter.Variability;
import sun.management.counter.Units;
/**
* Application to output jvmstat statistics exported by a target Java
* Virtual Machine. The jstat tool gets its inspiration from the suite
* of 'stat' tools, such as vmstat, iostat, mpstat, etc., available in
* various UNIX platforms.
*
* @author Brian Doherty
* @since 1.5
*/
public class Jstat {
private static Arguments arguments;
public static void main(String[] args) {
try {
arguments = new Arguments(args);
} catch (IllegalArgumentException e) {
System.err.println(e.getMessage());
Arguments.printUsage(System.err);
System.exit(1);
}
if (arguments.isHelp()) {
Arguments.printUsage(System.out);
System.exit(0);
}
if (arguments.isOptions()) {
OptionLister ol = new OptionLister(arguments.optionsSources());
ol.print(System.out);
System.exit(0);
}
try {
if (arguments.isList()) {
logNames();
} else if (arguments.isSnap()) {
logSnapShot();
} else {
logSamples();
}
} catch (MonitorException e) {
if (e.getMessage() != null) {
System.err.println(e.getMessage());
} else {
Throwable cause = e.getCause();
if ((cause != null) && (cause.getMessage() != null)) {
System.err.println(cause.getMessage());
} else {
e.printStackTrace();
}
}
System.exit(1);
}
System.exit(0);
}
static void logNames() throws MonitorException {
VmIdentifier vmId = arguments.vmId();
int interval = arguments.sampleInterval();
MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);
MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
JStatLogger logger = new JStatLogger(monitoredVm);
logger.printNames(arguments.counterNames(), arguments.comparator(),
arguments.showUnsupported(), System.out);
monitoredHost.detach(monitoredVm);
}
static void logSnapShot() throws MonitorException {
VmIdentifier vmId = arguments.vmId();
int interval = arguments.sampleInterval();
MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);
MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
JStatLogger logger = new JStatLogger(monitoredVm);
logger.printSnapShot(arguments.counterNames(), arguments.comparator(),
arguments.isVerbose(), arguments.showUnsupported(),
System.out);
monitoredHost.detach(monitoredVm);
}
static void logSamples() throws MonitorException {
final VmIdentifier vmId = arguments.vmId();
int interval = arguments.sampleInterval();
final MonitoredHost monitoredHost =
MonitoredHost.getMonitoredHost(vmId);
MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);
final JStatLogger logger = new JStatLogger(monitoredVm);
OutputFormatter formatter = null;
if (arguments.isSpecialOption()) {
OptionFormat format = arguments.optionFormat();
formatter = new OptionOutputFormatter(monitoredVm, format);
} else {
List<Monitor> logged = monitoredVm.findByPattern(arguments.counterNames());
Collections.sort(logged, arguments.comparator());
List<Monitor> constants = new ArrayList<Monitor>();
for (Iterator i = logged.iterator(); i.hasNext(); /* empty */) {
Monitor m = (Monitor)i.next();
if (!(m.isSupported() || arguments.showUnsupported())) {
i.remove();
continue;
}
if (m.getVariability() == Variability.CONSTANT) {
i.remove();
if (arguments.printConstants()) constants.add(m);
} else if ((m.getUnits() == Units.STRING)
&& !arguments.printStrings()) {
i.remove();
}
}
if (!constants.isEmpty()) {
logger.printList(constants, arguments.isVerbose(),
arguments.showUnsupported(), System.out);
if (!logged.isEmpty()) {
System.out.println();
}
}
if (logged.isEmpty()) {
monitoredHost.detach(monitoredVm);
return;
}
formatter = new RawOutputFormatter(logged,
arguments.printStrings());
}
// handle user termination requests by stopping sampling loops
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
logger.stopLogging();
}
});
// handle target termination events for targets other than ourself
HostListener terminator = new HostListener() {
public void vmStatusChanged(VmStatusChangeEvent ev) {
Integer lvmid = new Integer(vmId.getLocalVmId());
if (ev.getTerminated().contains(lvmid)) {
logger.stopLogging();
} else if (!ev.getActive().contains(lvmid)) {
logger.stopLogging();
}
}
public void disconnected(HostEvent ev) {
if (monitoredHost == ev.getMonitoredHost()) {
logger.stopLogging();
}
}
};
if (vmId.getLocalVmId() != 0) {
monitoredHost.addHostListener(terminator);
}
logger.logSamples(formatter, arguments.headerRate(),
arguments.sampleInterval(), arguments.sampleCount(),
System.out);
// detach from host events and from the monitored target jvm
if (terminator != null) {
monitoredHost.removeHostListener(terminator);
}
monitoredHost.detach(monitoredVm);
}
}