Mercurial > hg > release > thermostat-1.6
view thread/client-common/src/main/java/com/redhat/thermostat/thread/client/common/DeadlockParser.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> |
---|---|
date | Tue, 17 Jan 2017 12:19:56 -0500 |
parents | 31f274ab27a5 |
children |
line wrap: on
line source
/* * 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.thread.client.common; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.Reader; import java.io.StringReader; import java.util.ArrayList; import java.util.List; import java.util.Objects; import java.util.regex.Matcher; import java.util.regex.Pattern; public class DeadlockParser { public static class ParseException extends Exception { public ParseException(String message) { super(message); } public ParseException(String message, Throwable cause) { super(message, cause); } } public static class Information { public final List<Thread> threads; public Information(List<Thread> threads) { this.threads = threads; } } public static class Thread { public enum State { WAITING; } public final String name; public final String id; public final State state; public final List<String> stackTrace; public final List<Lock> ownedLocks; public final Lock waitingOn; public Thread(String id, String name, State state, List<String> stackTrace, List<Lock> ownedLocks, Lock waitingOn) { this.id = id; this.name = name; this.state = state; this.stackTrace = stackTrace; this.ownedLocks = ownedLocks; this.waitingOn = waitingOn; } } public static class Lock { public final String name; public final String ownerId; public Lock(String name, String ownerId) { this.name = name; this.ownerId = ownerId; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (!this.getClass().equals(obj.getClass())) { return false; } Lock other = (Lock) obj; return Objects.equals(other.name, this.name) && Objects.equals(other.ownerId, this.ownerId); } @Override public int hashCode() { return Objects.hash(this.name, this.ownerId); } } public Information parse(File file) throws IOException, ParseException { try (Reader reader = new FileReader(file)) { return parse(reader); } } public Information parse(Reader reader) throws IOException, ParseException { try (BufferedReader buffered = new BufferedReader(reader)) { return parse(buffered); } } public Information parse(BufferedReader reader) throws IOException, ParseException { List<Thread> threads = new ArrayList<>(); while (true) { Thread threadInfo = parseThread(reader); if (threadInfo == null) { break; } threads.add(threadInfo); } return new Information(threads); } private Thread parseThread(BufferedReader reader) throws IOException, ParseException { String line = reader.readLine(); if (line == null) { return null; } String regex = "\"(.*)\" Id=(\\d+) (WAITING) on (.*) owned by \"(.*)\" Id=(\\d+)"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(line); if (!matcher.matches()) { throw new ParseException("Failed to parse: '" + line + "'"); } String name = matcher.group(1); String id = matcher.group(2); Thread.State state = Thread.State.valueOf(matcher.group(3)); Lock waitingOn = new Lock(matcher.group(4), matcher.group(6)); List<String> stackTrace = new ArrayList<>(); String PREFIX = "\t"; // read stack trace while (true) { line = reader.readLine(); if (line.equals("")) { break; } if (line.startsWith(PREFIX + "at ")) { stackTrace.add(line.substring((PREFIX + "at ").length())); } else if (line.startsWith(PREFIX + "- waiting on")) { // ignore this } else if (line.startsWith(PREFIX + "...")) { // nothing to do } else { throw new ParseException("Unrecognized input: '" + line + "'"); } } final String TEXT_BEFORE = "Number of locked synchronizers = "; List<Lock> ownedLocks = new ArrayList<>(); int acquiredLocks = 0; // read locks while (true) { line = reader.readLine(); if (line == null || line.equals("")) { break; } if (line.startsWith(PREFIX + TEXT_BEFORE)) { acquiredLocks = Integer.valueOf(line.substring((PREFIX + TEXT_BEFORE).length())); } else if (line.startsWith(PREFIX + "- ")){ ownedLocks.add(new Lock(line.substring((PREFIX + "- ").length()), id)); } } if (acquiredLocks != ownedLocks.size()) { throw new AssertionError("Incorrectly parsed owned locks"); } /* discard = */ reader.readLine(); return new Thread(id, name, state, stackTrace, ownedLocks, waitingOn); } }