| /* |
| * Copyright (c) 2004, 2010, 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.jstat; |
| |
| import java.util.*; |
| import java.io.*; |
| import sun.jvmstat.monitor.*; |
| import sun.jvmstat.monitor.event.*; |
| import java.util.regex.PatternSyntaxException; |
| |
| /** |
| * Class to sample and output various jvmstat statistics for a target Java |
| * a target Java Virtual Machine. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class JStatLogger { |
| |
| private MonitoredVm monitoredVm; |
| private volatile boolean active = true; |
| |
| public JStatLogger(MonitoredVm monitoredVm) { |
| this.monitoredVm = monitoredVm; |
| } |
| |
| /** |
| * print the monitors that match the given monitor name pattern string. |
| */ |
| public void printNames(String names, Comparator<Monitor> comparator, |
| boolean showUnsupported, PrintStream out) |
| throws MonitorException, PatternSyntaxException { |
| |
| // get the set of all monitors |
| List<Monitor> items = monitoredVm.findByPattern(names); |
| Collections.sort(items, comparator); |
| |
| for (Monitor m: items) { |
| if (!(m.isSupported() || showUnsupported)) { |
| continue; |
| } |
| out.println(m.getName()); |
| } |
| } |
| |
| /** |
| * print name=value pairs for the given list of monitors. |
| */ |
| public void printSnapShot(String names, Comparator<Monitor> comparator, |
| boolean verbose, boolean showUnsupported, |
| PrintStream out) |
| throws MonitorException, PatternSyntaxException { |
| |
| // get the set of all monitors |
| List<Monitor> items = monitoredVm.findByPattern(names); |
| Collections.sort(items, comparator); |
| |
| printList(items, verbose, showUnsupported, out); |
| } |
| |
| /** |
| * print name=value pairs for the given list of monitors. |
| */ |
| public void printList(List<Monitor> list, boolean verbose, boolean showUnsupported, |
| PrintStream out) |
| throws MonitorException { |
| |
| // print out the name of each available counter |
| for (Monitor m: list ) { |
| |
| if (!(m.isSupported() || showUnsupported)) { |
| continue; |
| } |
| |
| StringBuilder buffer = new StringBuilder(); |
| buffer.append(m.getName()).append("="); |
| |
| if (m instanceof StringMonitor) { |
| buffer.append("\"").append(m.getValue()).append("\""); |
| } else { |
| buffer.append(m.getValue()); |
| } |
| |
| if (verbose) { |
| buffer.append(" ").append(m.getUnits()); |
| buffer.append(" ").append(m.getVariability()); |
| buffer.append(" ").append(m.isSupported() ? "Supported" |
| : "Unsupported"); |
| } |
| out.println(buffer); |
| } |
| } |
| |
| /** |
| * method to for asynchronous termination of sampling loops |
| */ |
| public void stopLogging() { |
| active = false; |
| } |
| |
| /** |
| * print samples according to the given format. |
| */ |
| public void logSamples(OutputFormatter formatter, int headerRate, |
| int sampleInterval, int sampleCount, PrintStream out) |
| throws MonitorException { |
| |
| long iterationCount = 0; |
| int printHeaderCount = 0; |
| |
| // if printHeader == 0, then only an initial column header is desired. |
| int printHeader = headerRate; |
| if (printHeader == 0) { |
| // print the column header once, disable future printing |
| out.println(formatter.getHeader()); |
| printHeader = -1; |
| } |
| |
| while (active) { |
| // check if it's time to print another column header |
| if (printHeader > 0 && --printHeaderCount <= 0) { |
| printHeaderCount = printHeader; |
| out.println(formatter.getHeader()); |
| } |
| |
| out.println(formatter.getRow()); |
| |
| // check if we've hit the specified sample count |
| if (sampleCount > 0 && ++iterationCount >= sampleCount) { |
| break; |
| } |
| |
| try { Thread.sleep(sampleInterval); } catch (Exception e) { }; |
| } |
| } |
| } |