Mercurial > hg > release > thermostat-1.6
view vm-profiler/client-core/src/main/java/com/redhat/thermostat/vm/profiler/client/core/ProfilingResultParser.java @ 2049:a92d602216ad
Update copyright license headers for 2017
PR3290
Reviewed-by: jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2017-January/021974.html
author | Andrew Azores <aazores@redhat.com> |
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date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 31f274ab27a5 |
children |
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/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.vm.profiler.client.core; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import java.util.concurrent.TimeUnit; import java.util.logging.Level; import java.util.logging.Logger; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.common.utils.MethodDescriptorConverter; import com.redhat.thermostat.common.utils.MethodDescriptorConverter.MethodDeclaration; import com.redhat.thermostat.vm.profiler.client.core.ProfilingResult.MethodInfo; /** * Results are expected to be in this format, one result per line: * * <pre> * [methodTime] [method] * </pre> * * Where {@code methodTime} is the total time, in nanoseconds, that the method * took. {@code method} is the method name followed by the method * descriptor, as defined by the <a href= * "http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3"> * Java Language</a>. An example is {@code foo(I)I} to indicate * {@code int foo(int)}. */ public class ProfilingResultParser { private static final Logger logger = LoggingUtils.getLogger(ProfilingResultParser.class); public ProfilingResult parse(InputStream in) { Map<String, Long> methodAndTimes = readData(in); return convertToResult(methodAndTimes); } private Map<String, Long> readData(InputStream in) { Map<String, Long> result = new HashMap<String, Long>(); try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { String[] parts = line.split("\\s+"); long time = TimeUnit.NANOSECONDS.toMillis(Long.valueOf(parts[0])); String name = parts[1]; result.put(name, time); } } catch (IOException e) { logger.log(Level.WARNING, "Unable to parse profiling data: ", e); } return result; } private ProfilingResult convertToResult(Map<String, Long> results) { ArrayList<MethodInfo> info = new ArrayList<>(); long totalTime = 0; for (Entry<String, Long> entry : results.entrySet()) { totalTime += entry.getValue().longValue(); } for (Entry<String, Long> entry : results.entrySet()) { String methodNameAndDescriptor = entry.getKey(); MethodDeclaration declaration = breakDownMethod(methodNameAndDescriptor); MethodInfo method = new MethodInfo(declaration, entry.getValue(), (entry.getValue() * 1.0 / totalTime) * 100); info.add(method); } Collections.sort(info, new Comparator<MethodInfo>() { @Override public int compare(MethodInfo o1, MethodInfo o2) { return Long.compare(o1.totalTimeInMillis, o2.totalTimeInMillis); } }); return new ProfilingResult(info); } private MethodDeclaration breakDownMethod(String name) { int startDescriptor = name.indexOf('('); if (startDescriptor == -1) { // handle malformed method descriptor by returning it as it is return new MethodDeclaration(name, new ArrayList<String>(), ""); } String methodClassName = name.substring(0, startDescriptor); return MethodDescriptorConverter.toJavaDeclaration(methodClassName, name.substring(startDescriptor)); } }