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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.logging;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Base64;
import java.util.List;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class SpoolerTest {
@TempDir
Path tempDir;
@Test
public void testSpoolingLogger() throws IOException {
Path spoolDir = tempDir.resolve("spool");
int maxEntriesPerFile = 1;
Spooler spooler = new Spooler(spoolDir, maxEntriesPerFile);
TestLogger logger = new TestLogger(spooler);
assertTrue(sendEntry(logger, "Yo entry"));
assertTrue(sendEntry(logger, "Yo entry 2"));
Path readyPath = spooler.readyPath();
Path readyFile1 = readyPath.resolve("1");
waitUntilFileExists(readyFile1);
Path readyFile2 = readyPath.resolve("2");
waitUntilFileExists(readyFile2);
// Check content after being moved to ready path
assertContent(readyFile1, "Yo entry");
assertContent(readyFile2, "Yo entry 2");
// Process files (read, transport files)
logger.manualRun();
assertEquals(2, logger.entriesSent());
// No files in processing or ready, 2 files in successes
assertProcessedFiles(spooler, 0);
assertReadyFiles(spooler, 0);
assertSuccessFiles(spooler, 2);
assertFailureFiles(spooler, 0);
}
@Test
public void testSpoolingManyEntriesPerFile() throws IOException {
Path spoolDir = tempDir.resolve("spool");
int maxEntriesPerFile = 2;
Spooler spooler = new Spooler(spoolDir, maxEntriesPerFile);
TestLogger logger = new TestLogger(spooler);
assertTrue(sendEntry(logger, "Yo entry"));
assertTrue(sendEntry(logger, "Yo entry 2"));
Path readyPath = spooler.readyPath();
Path readyFile1 = readyPath.resolve("1");
waitUntilFileExists(readyFile1);
// Check content after being moved to ready path
assertContent(readyFile1, "Yo entry");
// Process files (read, transport files)
logger.manualRun();
assertEquals(2, logger.entriesSent());
// No files in processing or ready, 1 file in successes
assertProcessedFiles(spooler, 0);
assertReadyFiles(spooler, 0);
assertSuccessFiles(spooler, 1);
assertFailureFiles(spooler, 0);
}
private void assertProcessedFiles(Spooler spooler, int expected) throws IOException {
assertEquals(expected, spooler.listFilesInPath(spooler.processingPath()).size());
}
private void assertReadyFiles(Spooler spooler, int expected) throws IOException {
assertEquals(expected, spooler.listFilesInPath(spooler.readyPath()).size());
}
private void assertSuccessFiles(Spooler spooler, int expected) throws IOException {
assertEquals(expected, spooler.listFilesInPath(spooler.successesPath()).size());
}
private void assertFailureFiles(Spooler spooler, int expected) throws IOException {
assertEquals(expected, spooler.listFilesInPath(spooler.failuresPath()).size());
}
@Test
public void failingToTransportIsRetried() throws IOException {
Path spoolDir = tempDir.resolve("spool");
Spooler spooler = new Spooler(spoolDir, 1);
FailingToTransportSecondEntryLogger logger = new FailingToTransportSecondEntryLogger(spooler);
assertTrue(sendEntry(logger, "Yo entry"));
logger.manualRun(); // Success for first message
assertEquals(1, spooler.listFilesInPath(spooler.successesPath()).size());
assertTrue(sendEntry(logger, "Yo entry 2"));
logger.manualRun(); // Failure for second message, so still just 1 file in successes path
assertEquals(1, spooler.listFilesInPath(spooler.successesPath()).size());
logger.manualRun(); // Success when retrying second message, so 2 files in successes path
assertEquals(2, spooler.listFilesInPath(spooler.successesPath()).size());
}
private boolean sendEntry(Logger logger, String x) {
return logger.newEntry()
.blob(x.getBytes())
.send();
}
private void waitUntilFileExists(Path path) {
Instant end = Instant.now().plus(Duration.ofSeconds(1));
while (!path.toFile().exists() && Instant.now().isBefore(end)) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
assertTrue(path.toFile().exists(), path.toFile() + " does not exits");
}
private void assertContent(Path file, String expectedContent) throws IOException {
String content = Files.readString(file);
assertTrue(content.contains(Base64.getEncoder().encodeToString(expectedContent.getBytes())));
}
private static class TestLogger extends AbstractSpoolingLogger {
private final List<LoggerEntry> entriesSent = new ArrayList<>();
public TestLogger(Spooler spooler) {
super(spooler);
}
@Override
boolean transport(LoggerEntry entry) {
entriesSent.add(entry);
return true;
}
@Override
public void run() {
// Do nothing, use manualRun
}
@Override
public boolean send(LoggerEntry entry) {
spooler.write(entry);
return true;
}
public void manualRun() {
super.run();
}
int entriesSent() {
return entriesSent.size();
}
}
private static class FailingToTransportSecondEntryLogger extends AbstractSpoolingLogger {
private int transportCount = 0;
public FailingToTransportSecondEntryLogger(Spooler spooler) {
super(spooler);
}
@Override
public boolean send(LoggerEntry entry) {
spooler.write(entry);
return true;
}
@Override
boolean transport(LoggerEntry entry) {
transportCount++;
return transportCount != 2;
}
@Override
public void run() {
// do nothing
}
public void manualRun() {
super.run();
}
}
}
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