Mercurial > hg > release > thermostat-1.0
view vm-cpu/agent/src/main/java/com/redhat/thermostat/vm/cpu/agent/internal/ProcessStatusInfoBuilder.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | ad1f6b074c0c |
children |
line wrap: on
line source
/* * Copyright 2012-2014 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.cpu.agent.internal; import java.io.BufferedReader; import java.io.IOException; import java.io.Reader; import java.util.Scanner; import java.util.logging.Level; import java.util.logging.Logger; import com.redhat.thermostat.agent.utils.ProcDataSource; import com.redhat.thermostat.common.utils.LoggingUtils; /** * Extract status information about the process from /proc/. This is what tools * like {@code ps} and {@code top} use. * * @see {@code proc(5)} */ public class ProcessStatusInfoBuilder { private static final Logger logger = LoggingUtils.getLogger(ProcessStatusInfoBuilder.class); private final ProcDataSource dataSource; public ProcessStatusInfoBuilder(ProcDataSource dataSource) { this.dataSource = dataSource; } public ProcessStatusInfo build(int pid) { try (BufferedReader reader = new BufferedReader(dataSource.getStatReader(pid))) { return build(reader); } catch (IOException e) { logger.log(Level.WARNING, "unable to read stat info for " + pid); } return null; } private ProcessStatusInfo build(Reader r) throws IOException { int pid = -1; long utime = -1; long stime = -1; Scanner scanner = null; /* TODO map these (effectively c) data types to java types more sanely */ try (BufferedReader reader = new BufferedReader(r)) { String statusLine = reader.readLine(); /* be prepared for process names like '1 ) 2 3 4 foo 5' */ scanner = new Scanner(statusLine); pid = scanner.nextInt(); scanner.close(); int execEndNamePos = statusLine.lastIndexOf(')'); String cleanStatusLine = statusLine.substring(execEndNamePos + 1); scanner = new Scanner(cleanStatusLine); /* state = */scanner.next(); /* ppid = */scanner.nextInt(); /* pgrp = */scanner.nextInt(); /* session = */scanner.nextInt(); /* tty_nr = */scanner.nextInt(); /* tpgid = */scanner.nextInt(); /* flags = */scanner.nextInt(); /* minflt = */scanner.nextLong(); /* cminflt = */scanner.nextLong(); /* majflt = */scanner.nextLong(); /* cmajflt = */scanner.nextLong(); utime = scanner.nextLong(); stime = scanner.nextLong(); scanner.close(); } return new ProcessStatusInfo(pid, utime, stime); } }