|
1
5 package com.tc.test.server.util;
6
7 import com.tc.util.runtime.Os;
8
9 import java.io.File  ;
10 import java.io.FileOutputStream ;
11 import java.io.IOException ;
12
13 public class VmStat {
14
15 private static Process process;
16 private static File scriptFile;
17 private static final String scriptName = "capture-vmstat.sh";
18 private static final String scriptContents = "#!/bin/sh\nexec vmstat 1 > vmstat.txt\n";
19
20 public static synchronized void start(File workingDir) throws IOException {
21 if (process != null) {
22 stop();
23 throw new IllegalStateException ("VmStat is already running. Stopping VmStat...");
24 }
25 if (Os.isWindows() || Os.isMac()) return;
27
28 String [] commandLine = new String [2];
29 commandLine[0] = "/bin/bash";
30 commandLine[1] = createScriptFile(workingDir).toString();
31
32 Runtime runtime = Runtime.getRuntime();
33 process = runtime.exec(commandLine, null, workingDir);
34
35 String msg = "\n";
36 msg += "*****************************\n";
37 msg += "* Running vmstat in [" + workingDir + "]\n";
38 msg += "*****************************\n";
39 System.out.println(msg);
40 }
41
42 public static synchronized void stop() {
43 if (process != null) {
44 process.destroy();
45 process = null;
46 deleteScriptFile();
47 }
48 }
49
50 private static synchronized File createScriptFile(File baseDir) throws IOException {
51 if (scriptFile != null) return scriptFile;
52 File script = new File (baseDir + File.separator + scriptName);
53 script.createNewFile();
54 FileOutputStream out = new FileOutputStream (script);
55 out.write(scriptContents.getBytes());
56 out.flush();
57 out.close();
58 return scriptFile = script;
59 }
60
61 private static synchronized void deleteScriptFile() {
62 if (scriptFile != null) {
63 scriptFile.delete();
64 scriptFile = null;
65 }
66 }
67 }
68 |
Popular Tags |
Java API By Example, From Geeks To Geeks.