| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| package org.apache.logging.log4j.core.appender; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.FileReader; |
| import java.io.IOException; |
| |
| import org.junit.jupiter.api.Test; |
| import org.junit.jupiter.api.io.TempDir; |
| |
| import static org.junit.jupiter.api.Assertions.*; |
| |
| /** |
| * Tests the MemoryMappedFileManager class. |
| * |
| * @since 2.1 |
| */ |
| public class MemoryMappedFileManagerTest { |
| |
| @TempDir |
| File tempDir; |
| |
| @Test |
| public void testRemapAfterInitialMapSizeExceeded() throws IOException { |
| final int mapSize = 64; // very small, on purpose |
| final File file = new File(tempDir, "memory-mapped-file.bin"); |
| |
| final boolean append = false; |
| final boolean immediateFlush = false; |
| try (final MemoryMappedFileManager manager = MemoryMappedFileManager.getFileManager(file.getAbsolutePath(), |
| append, immediateFlush, mapSize, null, null)) { |
| byte[] msg; |
| for (int i = 0; i < 1000; i++) { |
| msg = ("Message " + i + "\n").getBytes(); |
| manager.write(msg, 0, msg.length, false); |
| } |
| |
| } |
| |
| try (BufferedReader reader = new BufferedReader(new FileReader(file))) { |
| String line = reader.readLine(); |
| for (int i = 0; i < 1000; i++) { |
| assertNotNull(line, "line"); |
| assertTrue(line.contains("Message " + i), "line incorrect"); |
| line = reader.readLine(); |
| } |
| } |
| } |
| |
| @Test |
| public void testAppendDoesNotOverwriteExistingFile() throws IOException { |
| final File file = new File(tempDir, "memory-mapped-file.bin"); |
| |
| final int initialLength = 4 * 1024; |
| |
| // create existing file |
| try (FileOutputStream fos = new FileOutputStream(file)) { |
| fos.write(new byte[initialLength], 0, initialLength); |
| fos.flush(); |
| } |
| assertEquals(initialLength, file.length(), "all flushed to disk"); |
| |
| final boolean isAppend = true; |
| final boolean immediateFlush = false; |
| try (final MemoryMappedFileManager manager = MemoryMappedFileManager.getFileManager(file.getAbsolutePath(), |
| isAppend, immediateFlush, MemoryMappedFileManager.DEFAULT_REGION_LENGTH, null, null)) { |
| manager.writeBytes(new byte[initialLength], 0, initialLength); |
| } |
| final int expected = initialLength * 2; |
| assertEquals(expected, file.length(), "appended, not overwritten"); |
| } |
| } |