0N/A/*
3261N/A * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
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2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
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0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
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0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
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0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
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0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/Apackage sun.tools.jstat;
0N/A
0N/Aimport java.util.*;
0N/Aimport java.io.*;
0N/Aimport sun.jvmstat.monitor.*;
0N/Aimport sun.jvmstat.monitor.event.*;
0N/Aimport java.util.regex.PatternSyntaxException;
0N/A
0N/A/**
0N/A * Class to sample and output various jvmstat statistics for a target Java
0N/A * a target Java Virtual Machine.
0N/A *
0N/A * @author Brian Doherty
0N/A * @since 1.5
0N/A */
0N/Apublic class JStatLogger {
0N/A
0N/A private MonitoredVm monitoredVm;
0N/A private volatile boolean active = true;
0N/A
0N/A public JStatLogger(MonitoredVm monitoredVm) {
0N/A this.monitoredVm = monitoredVm;
0N/A }
0N/A
0N/A /**
0N/A * print the monitors that match the given monitor name pattern string.
0N/A */
0N/A public void printNames(String names, Comparator<Monitor> comparator,
0N/A boolean showUnsupported, PrintStream out)
0N/A throws MonitorException, PatternSyntaxException {
0N/A
0N/A // get the set of all monitors
0N/A List<Monitor> items = monitoredVm.findByPattern(names);
0N/A Collections.sort(items, comparator);
0N/A
0N/A for (Monitor m: items) {
0N/A if (!(m.isSupported() || showUnsupported)) {
0N/A continue;
0N/A }
0N/A out.println(m.getName());
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * print name=value pairs for the given list of monitors.
0N/A */
0N/A public void printSnapShot(String names, Comparator<Monitor> comparator,
0N/A boolean verbose, boolean showUnsupported,
0N/A PrintStream out)
0N/A throws MonitorException, PatternSyntaxException {
0N/A
0N/A // get the set of all monitors
0N/A List<Monitor> items = monitoredVm.findByPattern(names);
0N/A Collections.sort(items, comparator);
0N/A
0N/A printList(items, verbose, showUnsupported, out);
0N/A }
0N/A
0N/A /**
0N/A * print name=value pairs for the given list of monitors.
0N/A */
0N/A public void printList(List<Monitor> list, boolean verbose, boolean showUnsupported,
0N/A PrintStream out)
0N/A throws MonitorException {
0N/A
0N/A // print out the name of each available counter
0N/A for (Monitor m: list ) {
0N/A
0N/A if (!(m.isSupported() || showUnsupported)) {
0N/A continue;
0N/A }
0N/A
0N/A StringBuilder buffer = new StringBuilder();
0N/A buffer.append(m.getName()).append("=");
0N/A
0N/A if (m instanceof StringMonitor) {
0N/A buffer.append("\"").append(m.getValue()).append("\"");
0N/A } else {
0N/A buffer.append(m.getValue());
0N/A }
0N/A
0N/A if (verbose) {
0N/A buffer.append(" ").append(m.getUnits());
0N/A buffer.append(" ").append(m.getVariability());
0N/A buffer.append(" ").append(m.isSupported() ? "Supported"
0N/A : "Unsupported");
0N/A }
0N/A out.println(buffer);
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * method to for asynchronous termination of sampling loops
0N/A */
0N/A public void stopLogging() {
0N/A active = false;
0N/A }
0N/A
0N/A /**
0N/A * print samples according to the given format.
0N/A */
0N/A public void logSamples(OutputFormatter formatter, int headerRate,
0N/A int sampleInterval, int sampleCount, PrintStream out)
0N/A throws MonitorException {
0N/A
0N/A long iterationCount = 0;
0N/A int printHeaderCount = 0;
0N/A
0N/A // if printHeader == 0, then only an initial column header is desired.
0N/A int printHeader = headerRate;
0N/A if (printHeader == 0) {
0N/A // print the column header once, disable future printing
0N/A out.println(formatter.getHeader());
0N/A printHeader = -1;
0N/A }
0N/A
0N/A while (active) {
0N/A // check if it's time to print another column header
0N/A if (printHeader > 0 && --printHeaderCount <= 0) {
0N/A printHeaderCount = printHeader;
0N/A out.println(formatter.getHeader());
0N/A }
0N/A
0N/A out.println(formatter.getRow());
0N/A
0N/A // check if we've hit the specified sample count
0N/A if (sampleCount > 0 && ++iterationCount >= sampleCount) {
0N/A break;
0N/A }
0N/A
0N/A try { Thread.sleep(sampleInterval); } catch (Exception e) { };
0N/A }
0N/A }
0N/A}