1 /*
2 * Copyright (c) 2011, 2012, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.tools.jcmd;
27
28 import java.io.BufferedReader;
29 import java.io.FileReader;
30 import java.io.IOException;
31
32 class Arguments {
33 private boolean listProcesses = false;
34 private boolean listCounters = false;
35 private boolean showUsage = false;
36 private String command = null;
37 private String processString = null;
38
39 public boolean isListProcesses() { return listProcesses; }
40 public boolean isListCounters() { return listCounters; }
41 public boolean isShowUsage() { return showUsage; }
42 public String getCommand() { return command; }
43 public String getProcessString() { return processString; }
44
45 public Arguments(String[] args) {
46 if (args.length == 0 || args[0].equals("-l")) {
47 listProcesses = true;
48 /* list all processes */
49 processString = "0";
50 return;
51 }
52
53 if (args[0].equals("-h") || args[0].equals("-help") ) {
54 showUsage = true;
55 return;
56 }
57
58 processString = args[0];
59
60 StringBuilder sb = new StringBuilder();
61 for (int i = 1; i < args.length; i++) {
62 if (args[i].equals("-f")) {
63 if (args.length == i + 1) {
64 throw new IllegalArgumentException(
65 "No file specified for parameter -f");
66 } else if (args.length == i + 2) {
67 try {
68 readCommandFile(args[i + 1]);
69 } catch(IOException e) {
70 throw new IllegalArgumentException(
71 "Could not read from file specified with -f option: "
72 + args[i + 1]);
73 }
74 return;
75 } else {
76 throw new IllegalArgumentException(
77 "Options after -f are not allowed");
78 }
79 } else if (args[i].equals("PerfCounter.print")) {
80 listCounters = true;
81 } else {
82 sb.append(args[i]).append(" ");
83 }
84 }
85
86 if (listCounters != true && sb.length() == 0) {
87 throw new IllegalArgumentException("No command specified");
88 }
89
90 command = sb.toString().trim();
91 }
92
93 private void readCommandFile(String path) throws IOException {
94 try (BufferedReader bf = new BufferedReader(new FileReader(path));) {
95 StringBuilder sb = new StringBuilder();
96 String s;
97 while ((s = bf.readLine()) != null) {
98 sb.append(s).append("\n");
99 }
100 command = sb.toString();
101 }
102 }
103
104 public static void usage() {
105 System.out.println("Usage: jcmd <pid | main class> <command ...|PerfCounter.print|-f file>");
106 System.out.println(" or: jcmd -l ");
107 System.out.println(" or: jcmd -h ");
108 System.out.println(" ");
109 System.out.println(" command must be a valid jcmd command for the selected jvm. ");
110 System.out.println(" Use the command \"help\" to see which commands are available. ");
111 System.out.println(" If the pid is 0, commands will be sent to all Java processes. ");
112 System.out.println(" The main class argument will be used to match (either partially ");
113 System.out.println(" or fully) the class used to start Java. ");
114 System.out.println(" If no options are given, lists Java processes (same as -l). ");
115 System.out.println(" ");
116 System.out.println(" PerfCounter.print display the counters exposed by this process ");
117 System.out.println(" -f read and execute commands from the file ");
118 System.out.println(" -l list JVM processes on the local machine ");
119 System.out.println(" -h this help ");
120 }
121 }