1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package com.oracle.java.testlibrary;
25
26 import static com.oracle.java.testlibrary.Asserts.assertTrue;
27
28 import java.io.BufferedReader;
29 import java.io.File;
30 import java.io.FileReader;
31 import java.io.IOException;
32 import java.net.InetAddress;
33 import java.net.ServerSocket;
34 import java.net.UnknownHostException;
35 import java.util.ArrayList;
36 import java.util.List;
37 import java.util.Arrays;
38 import java.util.Collections;
39 import java.util.regex.Pattern;
40 import java.util.regex.Matcher;
41
42 /**
43 * Common library for various test helper functions.
44 */
45 public final class Utils {
46
47 /**
48 * Returns the sequence used by operating system to separate lines.
49 */
50 public static final String NEW_LINE = System.getProperty("line.separator");
51
52 /**
53 * Returns the value of 'test.vm.opts'system property.
54 */
55 public static final String VM_OPTIONS = System.getProperty("test.vm.opts", "").trim();
56
57 /**
58 * Returns the value of 'test.java.opts'system property.
59 */
60 public static final String JAVA_OPTIONS = System.getProperty("test.java.opts", "").trim();
61
62 /**
63 * Returns the value of 'test.timeout.factor' system property
64 * converted to {@code double}.
65 */
66 public static final double TIMEOUT_FACTOR;
67 static {
68 String toFactor = System.getProperty("test.timeout.factor", "1.0");
69 TIMEOUT_FACTOR = Double.parseDouble(toFactor);
70 }
71
72 private Utils() {
73 // Private constructor to prevent class instantiation
74 }
75
76 /**
77 * Returns the list of VM options.
78 *
79 * @return List of VM options
80 */
81 public static List<String> getVmOptions() {
82 return Arrays.asList(safeSplitString(VM_OPTIONS));
83 }
84
85 /**
86 * Returns the list of VM options with -J prefix.
87 *
88 * @return The list of VM options with -J prefix
89 */
90 public static List<String> getForwardVmOptions() {
91 String[] opts = safeSplitString(VM_OPTIONS);
92 for (int i = 0; i < opts.length; i++) {
93 opts[i] = "-J" + opts[i];
94 }
95 return Arrays.asList(opts);
96 }
97
98 /**
99 * Returns the default JTReg arguments for a jvm running a test.
100 * This is the combination of JTReg arguments test.vm.opts and test.java.opts.
101 * @return An array of options, or an empty array if no opptions.
102 */
103 public static String[] getTestJavaOpts() {
104 List<String> opts = new ArrayList<String>();
105 Collections.addAll(opts, safeSplitString(VM_OPTIONS));
106 Collections.addAll(opts, safeSplitString(JAVA_OPTIONS));
107 return opts.toArray(new String[0]);
108 }
109
110 /**
111 * Combines given arguments with default JTReg arguments for a jvm running a test.
112 * This is the combination of JTReg arguments test.vm.opts and test.java.opts
113 * @return The combination of JTReg test java options and user args.
114 */
115 public static String[] addTestJavaOpts(String... userArgs) {
116 List<String> opts = new ArrayList<String>();
117 Collections.addAll(opts, getTestJavaOpts());
118 Collections.addAll(opts, userArgs);
119 return opts.toArray(new String[0]);
120 }
121
122 /**
123 * Splits a string by white space.
124 * Works like String.split(), but returns an empty array
125 * if the string is null or empty.
126 */
127 private static String[] safeSplitString(String s) {
128 if (s == null || s.trim().isEmpty()) {
129 return new String[] {};
130 }
131 return s.trim().split("\\s+");
132 }
133
134 /**
135 * @return The full command line for the ProcessBuilder.
136 */
137 public static String getCommandLine(ProcessBuilder pb) {
138 StringBuilder cmd = new StringBuilder();
139 for (String s : pb.command()) {
140 cmd.append(s).append(" ");
141 }
142 return cmd.toString();
143 }
144
145 /**
146 * Returns the free port on the local host.
147 * The function will spin until a valid port number is found.
148 *
149 * @return The port number
150 * @throws InterruptedException if any thread has interrupted the current thread
151 * @throws IOException if an I/O error occurs when opening the socket
152 */
153 public static int getFreePort() throws InterruptedException, IOException {
154 int port = -1;
155
156 while (port <= 0) {
157 Thread.sleep(100);
158
159 ServerSocket serverSocket = null;
160 try {
161 serverSocket = new ServerSocket(0);
162 port = serverSocket.getLocalPort();
163 } finally {
164 serverSocket.close();
165 }
166 }
167
168 return port;
169 }
170
171 /**
172 * Returns the name of the local host.
173 *
174 * @return The host name
175 * @throws UnknownHostException if IP address of a host could not be determined
176 */
177 public static String getHostname() throws UnknownHostException {
178 InetAddress inetAddress = InetAddress.getLocalHost();
179 String hostName = inetAddress.getHostName();
180
181 assertTrue((hostName != null && !hostName.isEmpty()),
182 "Cannot get hostname");
183
184 return hostName;
185 }
186
187 /**
188 * Uses "jcmd -l" to search for a jvm pid. This function will wait
189 * forever (until jtreg timeout) for the pid to be found.
190 * @param key Regular expression to search for
191 * @return The found pid.
192 */
193 public static int waitForJvmPid(String key) throws Throwable {
194 final long iterationSleepMillis = 250;
195 System.out.println("waitForJvmPid: Waiting for key '" + key + "'");
196 System.out.flush();
197 while (true) {
198 int pid = tryFindJvmPid(key);
199 if (pid >= 0) {
200 return pid;
201 }
202 Thread.sleep(iterationSleepMillis);
203 }
204 }
205
206 /**
207 * Searches for a jvm pid in the output from "jcmd -l".
208 *
209 * Example output from jcmd is:
210 * 12498 sun.tools.jcmd.JCmd -l
211 * 12254 /tmp/jdk8/tl/jdk/JTwork/classes/com/sun/tools/attach/Application.jar
212 *
213 * @param key A regular expression to search for.
214 * @return The found pid, or -1 if Enot found.
215 * @throws Exception If multiple matching jvms are found.
216 */
217 public static int tryFindJvmPid(String key) throws Throwable {
218 OutputAnalyzer output = null;
219 try {
220 JDKToolLauncher jcmdLauncher = JDKToolLauncher.create("jcmd");
221 jcmdLauncher.addToolArg("-l");
222 output = ProcessTools.executeProcess(jcmdLauncher.getCommand());
223 output.shouldHaveExitValue(0);
224
225 // Search for a line starting with numbers (pid), follwed by the key.
226 Pattern pattern = Pattern.compile("([0-9]+)\\s.*(" + key + ").*\\r?\\n");
227 Matcher matcher = pattern.matcher(output.getStdout());
228
229 int pid = -1;
230 if (matcher.find()) {
231 pid = Integer.parseInt(matcher.group(1));
232 System.out.println("findJvmPid.pid: " + pid);
233 if (matcher.find()) {
234 throw new Exception("Found multiple JVM pids for key: " + key);
235 }
236 }
237 return pid;
238 } catch (Throwable t) {
239 System.out.println(String.format("Utils.findJvmPid(%s) failed: %s", key, t));
240 throw t;
241 }
242 }
243
244 /**
245 * Returns file content as a list of strings
246 *
247 * @param file File to operate on
248 * @return List of strings
249 * @throws IOException
250 */
251 public static List<String> fileAsList(File file) throws IOException {
252 assertTrue(file.exists() && file.isFile(),
253 file.getAbsolutePath() + " does not exist or not a file");
254 List<String> output = new ArrayList<>();
255 try (BufferedReader reader = new BufferedReader(new FileReader(file.getAbsolutePath()))) {
256 while (reader.ready()) {
257 output.add(reader.readLine().replace(NEW_LINE, ""));
258 }
259 }
260 return output;
261 }
262
263 }