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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.logging;
import com.yahoo.compress.ZstdCompressor;
import com.yahoo.container.logging.LogFileHandler.Compression;
import com.yahoo.io.IOUtils;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.function.BiFunction;
import java.util.logging.Formatter;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.SimpleFormatter;
import java.util.zip.GZIPInputStream;
import static com.yahoo.yolean.Exceptions.uncheck;
import static org.assertj.core.api.Assertions.assertThat;
/**
* @author Bob Travis
* @author bjorncs
*/
public class LogFileHandlerTestCase {
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
@Test
public void testIt() throws IOException {
File root = temporaryFolder.newFolder("logfilehandlertest");
String pattern = root.getAbsolutePath() + "/logfilehandlertest.%Y%m%d%H%M%S";
long[] rTimes = {1000, 2000, 10000};
Formatter formatter = new Formatter() {
public String format(LogRecord r) {
DateFormat df = new SimpleDateFormat("yyyy.MM.dd:HH:mm:ss.SSS");
String timeStamp = df.format(new Date(r.getMillis()));
return ("["+timeStamp+"]" + " " + formatMessage(r) + "\n");
}
};
LogFileHandler h = new LogFileHandler(Compression.NONE, pattern, rTimes, null, formatter);
long now = System.currentTimeMillis();
long millisPerDay = 60*60*24*1000;
long tomorrowDays = (now / millisPerDay) +1;
long tomorrowMillis = tomorrowDays * millisPerDay;
assertThat(tomorrowMillis+1000).isEqualTo(h.getNextRotationTime(tomorrowMillis));
assertThat(tomorrowMillis+10000).isEqualTo(h.getNextRotationTime(tomorrowMillis+3000));
LogRecord lr = new LogRecord(Level.INFO, "test");
h.publish(lr);
h.publish(new LogRecord(Level.INFO, "another test"));
h.rotateNow();
h.publish(lr);
h.flush();
h.shutdown();
}
@Test
public void testSimpleLogging() throws IOException {
File logFile = temporaryFolder.newFile("testLogFileG1.txt");
//create logfilehandler
LogFileHandler h = new LogFileHandler(Compression.NONE, logFile.getAbsolutePath(), "0 5 ...", null, new SimpleFormatter());
//write log
LogRecord lr = new LogRecord(Level.INFO, "testDeleteFileFirst1");
h.publish(lr);
h.flush();
h.shutdown();
}
@Test
public void testDeleteFileDuringLogging() throws IOException {
File logFile = temporaryFolder.newFile("testLogFileG2.txt");
//create logfilehandler
LogFileHandler h = new LogFileHandler(Compression.NONE, logFile.getAbsolutePath(), "0 5 ...", null, new SimpleFormatter());
//write log
LogRecord lr = new LogRecord(Level.INFO, "testDeleteFileDuringLogging1");
h.publish(lr);
h.flush();
//delete log file
logFile.delete();
//write log again
lr = new LogRecord(Level.INFO, "testDeleteFileDuringLogging2");
h.publish(lr);
h.flush();
h.shutdown();
}
@Test(timeout = /*5 minutes*/300_000)
public void testSymlink() throws IOException, InterruptedException {
File root = temporaryFolder.newFolder("testlogforsymlinkchecking");
Formatter formatter = new Formatter() {
public String format(LogRecord r) {
DateFormat df = new SimpleDateFormat("yyyy.MM.dd:HH:mm:ss.SSS");
String timeStamp = df.format(new Date(r.getMillis()));
return ("[" + timeStamp + "]" + " " + formatMessage(r) + "\n");
}
};
LogFileHandler handler = new LogFileHandler(
Compression.NONE, root.getAbsolutePath() + "/logfilehandlertest.%Y%m%d%H%M%S%s", new long[]{0}, "symlink", formatter);
String message = formatter.format(new LogRecord(Level.INFO, "test"));
handler.publish(new LogRecord(Level.INFO, message));
String firstFile;
do {
Thread.sleep(1);
firstFile = handler.getFileName();
} while (firstFile == null);
handler.rotateNow();
String secondFileName;
do {
Thread.sleep(1);
secondFileName = handler.getFileName();
} while (firstFile.equals(secondFileName));
String longMessage = formatter.format(new LogRecord(Level.INFO, "string which is way longer than the word test"));
handler.publish(new LogRecord(Level.INFO, longMessage));
handler.waitDrained();
assertThat(Files.size(Paths.get(firstFile))).isEqualTo(31);
final long expectedSecondFileLength = 72;
long secondFileLength;
do {
Thread.sleep(1);
secondFileLength = Files.size(Paths.get(secondFileName));
} while (secondFileLength != expectedSecondFileLength);
long symlinkFileLength = Files.size(root.toPath().resolve("symlink"));
assertThat(symlinkFileLength).isEqualTo(expectedSecondFileLength);
handler.shutdown();
}
@Test
public void testcompression_gzip() throws InterruptedException, IOException {
testcompression(
Compression.GZIP, "gz",
(compressedFile, __) -> uncheck(() -> new String(new GZIPInputStream(Files.newInputStream(compressedFile)).readAllBytes())));
}
@Test
public void testcompression_zstd() throws InterruptedException, IOException {
testcompression(
Compression.ZSTD, "zst",
(compressedFile, uncompressedSize) -> uncheck(() -> {
ZstdCompressor zstdCompressor = new ZstdCompressor();
byte[] uncompressedBytes = new byte[uncompressedSize];
byte[] compressedBytes = Files.readAllBytes(compressedFile);
zstdCompressor.decompress(compressedBytes, 0, compressedBytes.length, uncompressedBytes, 0, uncompressedBytes.length);
return new String(uncompressedBytes);
}));
}
private void testcompression(Compression compression,
String fileExtension,
BiFunction<Path, Integer, String> decompressor) throws IOException, InterruptedException {
File root = temporaryFolder.newFolder("testcompression" + compression.name());
Formatter formatter = new Formatter() {
public String format(LogRecord r) {
DateFormat df = new SimpleDateFormat("yyyy.MM.dd:HH:mm:ss.SSS");
String timeStamp = df.format(new Date(r.getMillis()));
return ("[" + timeStamp + "]" + " " + formatMessage(r) + "\n");
}
};
LogFileHandler h = new LogFileHandler(
compression, root.getAbsolutePath() + "/logfilehandlertest.%Y%m%d%H%M%S%s", new long[]{0}, null, formatter);
int logEntries = 10000;
for (int i = 0; i < logEntries; i++) {
LogRecord lr = new LogRecord(Level.INFO, "test\n");
h.publish(lr);
}
h.waitDrained();
String f1 = h.getFileName();
assertThat(f1).startsWith(root.getAbsolutePath() + "/logfilehandlertest.");
File uncompressed = new File(f1);
File compressed = new File(f1 + "." + fileExtension);
assertThat(uncompressed).exists();
assertThat(compressed).doesNotExist();
String content = IOUtils.readFile(uncompressed);
assertThat(content).hasLineCount(logEntries);
h.rotateNow();
while (uncompressed.exists()) {
Thread.sleep(1);
}
assertThat(compressed).exists();
String uncompressedContent = decompressor.apply(compressed.toPath(), content.getBytes().length);
assertThat(uncompressedContent).isEqualTo(content);
h.shutdown();
}
}
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