Mercurial > hg > release > thermostat-0.5
view system-backend/src/main/java/com/redhat/thermostat/backend/system/ProcessEnvironmentBuilder.java @ 929:ccac9bcabaa0
Update copyright year of source code
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/005295.html
reviewed-by: vanaltj
author | Mario Torre <neugens.limasoftware@gmail.com> |
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date | Wed, 23 Jan 2013 16:49:27 +0100 |
parents | da7f134762f6 |
children |
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/* * Copyright 2012, 2013 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.backend.system; import java.io.IOException; import java.io.Reader; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.logging.Level; import java.util.logging.Logger; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.utils.ProcDataSource; public class ProcessEnvironmentBuilder { private static final Logger logger = LoggingUtils.getLogger(ProcessEnvironmentBuilder.class); private final ProcDataSource dataSource; public ProcessEnvironmentBuilder(ProcDataSource dataSource) { this.dataSource = dataSource; } public Map<String, String> build(int pid) { try (Reader reader = dataSource.getEnvironReader(pid)) { return build(reader); } catch (IOException ioe) { logger.log(Level.WARNING, "error reading env", ioe); } return Collections.emptyMap(); } private Map<String,String> build(Reader reader) throws IOException { Map<String, String> env = new HashMap<String, String>(); char[] fileBuffer = new char[1024]; int fileBufferIndex = 0; char[] buffer = new char[1024]; int read = 0; while (true) { read = reader.read(buffer); if (read == -1) { break; } if (read + fileBufferIndex > fileBuffer.length) { char[] newFileBuffer = new char[fileBuffer.length * 2]; System.arraycopy(fileBuffer, 0, newFileBuffer, 0, fileBufferIndex); fileBuffer = newFileBuffer; } System.arraycopy(buffer, 0, fileBuffer, fileBufferIndex, read); fileBufferIndex = fileBufferIndex + read; } List<String> parts = getParts(fileBuffer, fileBufferIndex); for (String part : parts) { int splitterPos = part.indexOf("="); String key = part.substring(0, splitterPos); String value = part.substring(splitterPos + 1); env.put(key, value); } return env; } /** * Split a char array, where items are separated by a null into into a list * of strings */ private List<String> getParts(char[] nullSeparatedBuffer, int bufferLength) { int maxLength = Math.min(nullSeparatedBuffer.length, bufferLength); List<String> parts = new ArrayList<String>(); int lastStart = 0; for (int i = 0; i < maxLength; i++) { if (nullSeparatedBuffer[i] == '\0') { String string = new String(nullSeparatedBuffer, lastStart, (i - lastStart)); parts.add(string); lastStart = i + 1; } } return parts; } }