001 /*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * SonarQube is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
019 */
020 package org.sonar.process;
021
022 import org.apache.commons.io.FileUtils;
023 import org.apache.commons.lang.StringUtils;
024
025 import java.io.File;
026 import java.io.IOException;
027 import java.util.HashMap;
028 import java.util.Map;
029
030 public class MinimumViableSystem {
031
032 private final Map<String, String> requiredJavaOptions = new HashMap<String, String>();
033
034 public MinimumViableSystem setRequiredJavaOption(String propertyKey, String expectedValue) {
035 requiredJavaOptions.put(propertyKey, expectedValue);
036 return this;
037 }
038
039 /**
040 * Entry point for all checks
041 */
042 public void check() {
043 checkJavaVersion();
044 checkJavaOptions();
045 checkWritableTempDir();
046 }
047
048 /**
049 * Verify that temp directory is writable
050 */
051 private void checkWritableTempDir() {
052 checkWritableDir(System.getProperty("java.io.tmpdir"));
053 }
054
055 void checkWritableDir(String tempPath) {
056 try {
057 File tempFile = File.createTempFile("check", "tmp", new File(tempPath));
058 FileUtils.deleteQuietly(tempFile);
059 } catch (IOException e) {
060 throw new IllegalStateException(String.format("Temp directory is not writable: %s", tempPath), e);
061 }
062 }
063
064 void checkJavaOptions() {
065 for (Map.Entry<String, String> entry : requiredJavaOptions.entrySet()) {
066 String value = System.getProperty(entry.getKey());
067 if (!StringUtils.equals(value, entry.getValue())) {
068 throw new MessageException(String.format(
069 "JVM option '%s' must be set to '%s'. Got '%s'", entry.getKey(), entry.getValue(), StringUtils.defaultString(value)));
070 }
071 }
072 }
073
074 void checkJavaVersion() {
075 String javaVersion = System.getProperty("java.specification.version");
076 checkJavaVersion(javaVersion);
077 }
078
079 void checkJavaVersion(String javaVersion) {
080 if (!javaVersion.startsWith("1.6") && !javaVersion.startsWith("1.7") && !javaVersion.startsWith("1.8")) {
081 // still better than "java.lang.UnsupportedClassVersionError: Unsupported major.minor version 49.0
082 throw new MessageException(String.format("Supported versions of Java are 1.6, 1.7 and 1.8. Got %s.", javaVersion));
083 }
084 }
085
086 }