1 /*
   2  * Copyright (c) 2016, 2018, 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 jdk.jfr.internal.cmd;
  27 
  28 import java.io.IOException;
  29 import java.io.PrintWriter;
  30 import java.nio.file.Path;
  31 import java.nio.file.Paths;
  32 import java.util.Deque;
  33 
  34 final class PrintCommand extends Command {
  35     @Override
  36     public String getName() {
  37         return "print";
  38     }
  39 
  40     @Override
  41     public String getOptionSyntax() {
  42         return "[--xml|--json] <file>";
  43     }
  44 
  45     @Override
  46     public String getDescription() {
  47         return "Print contents of a recording file (.jfr)";
  48     }
  49 
  50     @Override
  51     public void displayOptionUsage() {
  52         println("  --xml    Print a recording in XML format");
  53         println();
  54         println("  --json   Print a recording in JSON format");
  55         println();
  56         println("  <file>   Location of the recording file (.jfr) to print");
  57     }
  58 
  59     @Override
  60     public void execute(Deque<String> options) {
  61         if (options.isEmpty()) {
  62             userFailed("Missing file");
  63         }
  64         ensureMaxArgumentCount(options, 2);
  65 
  66         Path file = Paths.get(options.removeLast());
  67 
  68         ensureFileExist(file);
  69         ensureJFRFile(file);
  70         ensureMaxArgumentCount(options, 1);
  71 
  72         String format = "--pretty";
  73         if (!options.isEmpty()) {
  74             format = options.remove();
  75         }
  76         try (PrintWriter pw = new PrintWriter(System.out)) {
  77             try {
  78                 switch (format) {
  79                 case "--pretty":
  80                     PrettyWriter prettyWriter = new PrettyWriter(pw);
  81                     prettyWriter.print(file);
  82                     break;
  83                 case "--xml":
  84                     XMLWriter xmlPrinter = new XMLWriter(pw);
  85                     xmlPrinter.print(file);
  86                     break;
  87                 case "--json":
  88                     JSONWriter jsonWriter = new JSONWriter(pw);
  89                     jsonWriter.print(file);
  90                     break;
  91                 default:
  92                     userFailed("Unknown option " + format);
  93                     break;
  94                 }
  95             } catch (IOException ioe) {
  96                 userFailed("Could not read recording at " + file.toAbsolutePath() + ". " + ioe.getMessage());
  97             }
  98         }
  99     }
 100 }