1 /* 2 * Copyright (c) 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.event.io; 27 28 import static jdk.test.lib.Asserts.assertEquals; 29 30 import java.io.File; 31 import java.io.RandomAccessFile; 32 import java.time.Duration; 33 import java.util.ArrayList; 34 import java.util.List; 35 36 import jdk.jfr.Recording; 37 import jdk.jfr.consumer.RecordedEvent; 38 import jdk.test.lib.jfr.Events; 39 40 /* 41 * @test 42 * @key jfr 43 * @library /test/lib /test/jdk 44 * @run main/othervm jdk.jfr.event.io.TestRandomAccessFileEvents 45 */ 46 public class TestRandomAccessFileEvents { 47 48 public static void main(String[] args) throws Throwable { 49 File tmp = File.createTempFile("TestRandomAccessFileEvents", ".tmp", new File(".")); 50 tmp.deleteOnExit(); 51 Recording recording = new Recording(); 52 List<IOEvent> expectedEvents = new ArrayList<>(); 53 54 recording.enable(IOEvent.EVENT_FILE_WRITE).withThreshold(Duration.ofMillis(0)); 55 recording.enable(IOEvent.EVENT_FILE_READ).withThreshold(Duration.ofMillis(0)); 56 recording.start(); 57 58 RandomAccessFile ras = new RandomAccessFile(tmp, "rw"); 59 int writeInt = 47; 60 byte[] writeBuffer = {10,11,12,13}; 61 62 // Write an int and a buffer. 63 ras.write(writeInt); 64 expectedEvents.add(IOEvent.createFileWriteEvent(1, tmp)); 65 ras.write(writeBuffer); 66 expectedEvents.add(IOEvent.createFileWriteEvent(writeBuffer.length, tmp)); 67 68 ras.seek(0); 69 70 // Read int and buffer 71 int readInt = ras.read(); 72 assertEquals(readInt, writeInt, "wrong int read"); 73 expectedEvents.add(IOEvent.createFileReadEvent(1, tmp)); 74 byte[] readBuffer = new byte [writeBuffer.length]; 75 int size = ras.read(readBuffer); 76 verifyBufferEquals(readBuffer, writeBuffer); 77 expectedEvents.add(IOEvent.createFileReadEvent(readBuffer.length, tmp)); 78 79 // Read beyond EOF 80 readInt = ras.read(); 81 assertEquals(-1, readInt, "wrong read after EOF"); 82 expectedEvents.add(IOEvent.createFileReadEvent(-1, tmp)); 83 84 // Seek to beginning and verify we can read after EOF. 85 ras.seek(0); 86 readInt = ras.read(); 87 assertEquals(readInt, writeInt, "wrong int read after seek(0)"); 88 expectedEvents.add(IOEvent.createFileReadEvent(1, tmp)); 89 90 // seek beyond EOF and verify we get EOF when reading. 91 ras.seek(10); 92 readInt = ras.read(); 93 assertEquals(-1, readInt, "wrong read after seek beyond EOF"); 94 expectedEvents.add(IOEvent.createFileReadEvent(-1, tmp)); 95 96 // Read partial buffer. 97 int partialSize = writeBuffer.length - 2; 98 ras.seek(ras.length()-partialSize); 99 size = ras.read(readBuffer); 100 assertEquals(size, partialSize, "Wrong size partial buffer read"); 101 expectedEvents.add(IOEvent.createFileReadEvent(size, tmp)); 102 103 ras.close(); 104 recording.stop(); 105 List<RecordedEvent> events = Events.fromRecording(recording); 106 IOHelper.verifyEqualsInOrder(events, expectedEvents); 107 } 108 109 private static void verifyBufferEquals(byte[] a, byte[] b) { 110 assertEquals(a.length, b.length, "Wrong buffer size"); 111 for (int i = 0; i < a.length; ++i) { 112 assertEquals(a[i], b[i], "Wrong buffer content at pos " + i); 113 } 114 } 115 }