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| 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 java.io.*; | ||
| 30 | import sun.jvmstat.monitor.*; | ||
| 31 | import sun.jvmstat.monitor.event.*; | ||
| 32 | import java.util.regex.PatternSyntaxException; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * Class to sample and output various jvmstat statistics for a target Java | ||
| 36 | * a target Java Virtual Machine. | ||
| 37 | * | ||
| 38 | * @author Brian Doherty | ||
| 39 | * @since 1.5 | ||
| 40 | */ | ||
| 41 | public class JStatLogger { | ||
| 42 | |||
| 43 | private MonitoredVm monitoredVm; | ||
| 44 | private volatile boolean active = true; | ||
| 45 | |||
| 46 | public JStatLogger(MonitoredVm monitoredVm) { | ||
| 47 | this.monitoredVm = monitoredVm; | ||
| 48 | } | ||
| 49 | |||
| 50 | /** | ||
| 51 | * print the monitors that match the given monitor name pattern string. | ||
| 52 | */ | ||
| 53 | public void printNames(String names, Comparator<Monitor> comparator, | ||
| 54 | boolean showUnsupported, PrintStream out) | ||
| 55 | throws MonitorException, PatternSyntaxException { | ||
| 56 | |||
| 57 | // get the set of all monitors | ||
| 58 | List<Monitor> items = monitoredVm.findByPattern(names); | ||
| 59 | Collections.sort(items, comparator); | ||
| 60 | |||
| 61 | for (Monitor m: items) { | ||
| 62 | if (!(m.isSupported() || showUnsupported)) { | ||
| 63 | continue; | ||
| 64 | } | ||
| 65 | out.println(m.getName()); | ||
| 66 | } | ||
| 67 | } | ||
| 68 | |||
| 69 | /** | ||
| 70 | * print name=value pairs for the given list of monitors. | ||
| 71 | */ | ||
| 72 | public void printSnapShot(String names, Comparator<Monitor> comparator, | ||
| 73 | boolean verbose, boolean showUnsupported, | ||
| 74 | PrintStream out) | ||
| 75 | throws MonitorException, PatternSyntaxException { | ||
| 76 | |||
| 77 | // get the set of all monitors | ||
| 78 | List<Monitor> items = monitoredVm.findByPattern(names); | ||
| 79 | Collections.sort(items, comparator); | ||
| 80 | |||
| 81 | printList(items, verbose, showUnsupported, out); | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * print name=value pairs for the given list of monitors. | ||
| 86 | */ | ||
| 87 | public void printList(List<Monitor> list, boolean verbose, boolean showUnsupported, | ||
| 88 | PrintStream out) | ||
| 89 | throws MonitorException { | ||
| 90 | |||
| 91 | // print out the name of each available counter | ||
| 92 | for (Monitor m: list ) { | ||
| 93 | |||
| 94 | if (!(m.isSupported() || showUnsupported)) { | ||
| 95 | continue; | ||
| 96 | } | ||
| 97 | |||
| 98 | StringBuilder buffer = new StringBuilder(); | ||
| 99 | buffer.append(m.getName()).append("="); | ||
| 100 | |||
| 101 | if (m instanceof StringMonitor) { | ||
| 102 | buffer.append("\"").append(m.getValue()).append("\""); | ||
| 103 | } else { | ||
| 104 | buffer.append(m.getValue()); | ||
| 105 | } | ||
| 106 | |||
| 107 | if (verbose) { | ||
| 108 | buffer.append(" ").append(m.getUnits()); | ||
| 109 | buffer.append(" ").append(m.getVariability()); | ||
| 110 | buffer.append(" ").append(m.isSupported() ? "Supported" | ||
| 111 | : "Unsupported"); | ||
| 112 | } | ||
| 113 | out.println(buffer); | ||
| 114 | } | ||
| 115 | } | ||
| 116 | |||
| 117 | /** | ||
| 118 | * method to for asynchronous termination of sampling loops | ||
| 119 | */ | ||
| 120 | public void stopLogging() { | ||
| 121 | active = false; | ||
| 122 | } | ||
| 123 | |||
| 124 | /** | ||
| 125 | * print samples according to the given format. | ||
| 126 | */ | ||
| 127 | public void logSamples(OutputFormatter formatter, int headerRate, | ||
| 128 | int sampleInterval, int sampleCount, PrintStream out) | ||
| 129 | throws MonitorException { | ||
| 130 | |||
| 131 | long iterationCount = 0; | ||
| 132 | int printHeaderCount = 0; | ||
| 133 | |||
| 134 | // if printHeader == 0, then only an initial column header is desired. | ||
| 135 | int printHeader = headerRate; | ||
| 136 | if (printHeader == 0) { | ||
| 137 | // print the column header once, disable future printing | ||
| 138 | out.println(formatter.getHeader()); | ||
| 139 | printHeader = -1; | ||
| 140 | } | ||
| 141 | |||
| 142 | while (active) { | ||
| 143 | // check if it's time to print another column header | ||
| 144 | if (printHeader > 0 && --printHeaderCount <= 0) { | ||
| 145 | printHeaderCount = printHeader; | ||
| 146 | out.println(formatter.getHeader()); | ||
| 147 | } | ||
| 148 | |||
| 149 | out.println(formatter.getRow()); | ||
| 150 | |||
| 151 | // check if we've hit the specified sample count | ||
| 152 | if (sampleCount > 0 && ++iterationCount >= sampleCount) { | ||
| 153 | break; | ||
| 154 | } | ||
| 155 | |||
| 156 | try { Thread.sleep(sampleInterval); } catch (Exception e) { }; | ||
| 157 | } | ||
| 158 | } | ||
| 159 | } | ||