1 /*

     2  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.tools.jstat;

    27 

    28 import java.util.*;

    29 import sun.jvmstat.monitor.*;

    30 import sun.jvmstat.monitor.event.*;

    31 

    32 /**

    33  * Application to output jvmstat statistics exported by a target Java

    34  * Virtual Machine. The jstat tool gets its inspiration from the suite

    35  * of 'stat' tools, such as vmstat, iostat, mpstat, etc., available in

    36  * various UNIX platforms.

    37  *

    38  * @author Brian Doherty

    39  * @since 1.5

    40  */

    41 public class Jstat {

    42     private static Arguments arguments;

    43 

    44     public static void main(String[] args) {

    45         try {

    46             arguments = new Arguments(args);

    47         } catch (IllegalArgumentException e) {

    48             System.err.println(e.getMessage());

    49             Arguments.printUsage(System.err);

    50             System.exit(1);

    51         }

    52 

    53         if (arguments.isHelp()) {

    54             Arguments.printUsage(System.out);

    55             System.exit(0);

    56         }

    57 

    58         if (arguments.isOptions()) {

    59             OptionLister ol = new OptionLister(arguments.optionsSources());

    60             ol.print(System.out);

    61             System.exit(0);

    62         }

    63 

    64         try {

    65             if (arguments.isList()) {

    66                 logNames();

    67             } else if (arguments.isSnap()) {

    68                 logSnapShot();

    69             } else {

    70                 logSamples();

    71             }

    72         } catch (MonitorException e) {

    73             e.printStackTrace();

    74             System.exit(1);

    75         }

    76         System.exit(0);

    77     }

    78 

    79     static void logNames() throws MonitorException {

    80         VmIdentifier vmId = arguments.vmId();

    81         int interval = arguments.sampleInterval();

    82         MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);

    83         MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);

    84         JStatLogger logger = new JStatLogger(monitoredVm);

    85         logger.printNames(arguments.counterNames(), arguments.comparator(),

    86                           arguments.showUnsupported(), System.out);

    87         monitoredHost.detach(monitoredVm);

    88     }

    89 

    90     static void logSnapShot() throws MonitorException {

    91         VmIdentifier vmId = arguments.vmId();

    92         int interval = arguments.sampleInterval();

    93         MonitoredHost monitoredHost = MonitoredHost.getMonitoredHost(vmId);

    94         MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);

    95         JStatLogger logger = new JStatLogger(monitoredVm);

    96         logger.printSnapShot(arguments.counterNames(), arguments.comparator(),

    97                              arguments.isVerbose(), arguments.showUnsupported(),

    98                              System.out);

    99         monitoredHost.detach(monitoredVm);

   100     }

   101 

   102     static void logSamples() throws MonitorException {

   103         final VmIdentifier vmId = arguments.vmId();

   104         int interval = arguments.sampleInterval();

   105         final MonitoredHost monitoredHost =

   106                 MonitoredHost.getMonitoredHost(vmId);

   107         MonitoredVm monitoredVm = monitoredHost.getMonitoredVm(vmId, interval);

   108         final JStatLogger logger = new JStatLogger(monitoredVm);

   109         OutputFormatter formatter = null;

   110 

   111         if (arguments.isSpecialOption()) {

   112             OptionFormat format = arguments.optionFormat();

   113             formatter = new OptionOutputFormatter(monitoredVm, format);

   114         } else {

   115             List<Monitor> logged = monitoredVm.findByPattern(arguments.counterNames());

   116             Collections.sort(logged, arguments.comparator());

   117             List<Monitor> constants = new ArrayList<Monitor>();

   118 

   119             for (Iterator<Monitor> i = logged.iterator(); i.hasNext(); /* empty */) {

   120                 Monitor m = i.next();

   121                 if (!(m.isSupported() || arguments.showUnsupported())) {

   122                     i.remove();

   123                     continue;

   124                 }

   125                 if (m.getVariability() == Variability.CONSTANT) {

   126                     i.remove();

   127                     if (arguments.printConstants()) constants.add(m);

   128                 } else if ((m.getUnits() == Units.STRING)

   129                         && !arguments.printStrings()) {

   130                     i.remove();

   131                 }

   132             }

   133 

   134             if (!constants.isEmpty()) {

   135                 logger.printList(constants, arguments.isVerbose(),

   136                                  arguments.showUnsupported(), System.out);

   137                 if (!logged.isEmpty()) {

   138                     System.out.println();

   139                 }

   140             }

   141 

   142             if (logged.isEmpty()) {

   143                 monitoredHost.detach(monitoredVm);

   144                 return;

   145             }

   146 

   147             formatter = new RawOutputFormatter(logged,

   148                                                arguments.printStrings());

   149         }

   150 

   151         // handle user termination requests by stopping sampling loops

   152         Runtime.getRuntime().addShutdownHook(new Thread() {

   153             public void run() {

   154                 logger.stopLogging();

   155             }

   156         });

   157 

   158         // handle target termination events for targets other than ourself

   159         HostListener terminator = new HostListener() {

   160             public void vmStatusChanged(VmStatusChangeEvent ev) {

   161                 Integer lvmid = vmId.getLocalVmId();

   162                 if (ev.getTerminated().contains(lvmid)) {

   163                     logger.stopLogging();

   164                 } else if (!ev.getActive().contains(lvmid)) {

   165                     logger.stopLogging();

   166                 }

   167             }

   168 

   169             public void disconnected(HostEvent ev) {

   170                 if (monitoredHost == ev.getMonitoredHost()) {

   171                     logger.stopLogging();

   172                 }

   173             }

   174         };

   175 

   176         if (vmId.getLocalVmId() != 0) {

   177             monitoredHost.addHostListener(terminator);

   178         }

   179 

   180         logger.logSamples(formatter, arguments.headerRate(),

   181                           arguments.sampleInterval(), arguments.sampleCount(),

   182                           System.out);

   183 

   184         // detach from host events and from the monitored target jvm

   185         if (terminator != null) {

   186             monitoredHost.removeHostListener(terminator);

   187         }

   188         monitoredHost.detach(monitoredVm);

   189     }

   190 }