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 }