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 }