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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.vespa.hosted.controller.persistence;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.SystemName;
import com.yahoo.vespa.hosted.controller.api.integration.LogEntry;
import com.yahoo.vespa.hosted.controller.api.integration.RunDataStore;
import com.yahoo.vespa.hosted.controller.api.integration.deployment.RunId;
import com.yahoo.vespa.hosted.controller.api.integration.stubs.MockRunDataStore;
import com.yahoo.vespa.hosted.controller.deployment.DeploymentContext;
import com.yahoo.vespa.hosted.controller.deployment.RunLog;
import com.yahoo.vespa.hosted.controller.deployment.Step;
import org.junit.Test;
import java.time.Instant;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.stream.IntStream;
import static java.util.stream.Collectors.toUnmodifiableList;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
public class BufferedLogStoreTest {
@Test
public void chunkingAndFlush() {
int chunkSize = 1 << 10;
int maxChunks = 1 << 5;
CuratorDb buffer = new MockCuratorDb(SystemName.main);
RunDataStore store = new MockRunDataStore();
BufferedLogStore logs = new BufferedLogStore(chunkSize, chunkSize * maxChunks, buffer, store);
RunId id = new RunId(ApplicationId.from("tenant", "application", "instance"),
DeploymentContext.productionUsWest1,
123);
byte[] manyBytes = new byte[chunkSize / 2 + 1]; // One fits, and two (over-)fills.
Arrays.fill(manyBytes, (byte) 'O');
LogEntry entry = new LogEntry(0, Instant.ofEpochMilli(123), LogEntry.Type.warning, new String(manyBytes));
// Log entries are re-sequenced by the log store, by enumeration.
LogEntry entry0 = new LogEntry(0, entry.at(), entry.type(), entry.message());
LogEntry entry1 = new LogEntry(1, entry.at(), entry.type(), entry.message());
LogEntry entry2 = new LogEntry(2, entry.at(), entry.type(), entry.message());
LogEntry entry3 = new LogEntry(3, entry.at(), entry.type(), entry.message());
LogEntry entry4 = new LogEntry(4, entry.at(), entry.type(), entry.message());
assertEquals(Optional.empty(), logs.readFinished(id, -1));
assertEquals(RunLog.empty(), logs.readActive(id.application(), id.type(), -1));
logs.append(id.application(), id.type(), Step.deployReal, List.of(entry));
assertEquals(List.of(entry0),
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal));
assertEquals(RunLog.empty(), logs.readActive(id.application(), id.type(), 0));
logs.append(id.application(), id.type(), Step.deployReal, List.of(entry));
assertEquals(List.of(entry0, entry1),
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal));
assertEquals(List.of(entry1),
logs.readActive(id.application(), id.type(), 0).get(Step.deployReal));
assertEquals(RunLog.empty(), logs.readActive(id.application(), id.type(), 1));
logs.append(id.application(), id.type(), Step.deployReal, List.of(entry, entry, entry));
assertEquals(List.of(entry0, entry1, entry2, entry3, entry4),
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal));
assertEquals(List.of(entry1, entry2, entry3, entry4),
logs.readActive(id.application(), id.type(), 0).get(Step.deployReal));
assertEquals(List.of(entry2, entry3, entry4),
logs.readActive(id.application(), id.type(), 1).get(Step.deployReal));
assertEquals(List.of(entry3, entry4),
logs.readActive(id.application(), id.type(), 2).get(Step.deployReal));
assertEquals(List.of(entry4),
logs.readActive(id.application(), id.type(), 3).get(Step.deployReal));
assertEquals(RunLog.empty(), logs.readActive(id.application(), id.type(), 4));
// We should now have three chunks, with two, two, and one entries.
assertEquals(Optional.of(4L), buffer.readLastLogEntryId(id.application(), id.type()));
assertArrayEquals(new long[]{0, 2, 4}, buffer.getLogChunkIds(id.application(), id.type()).toArray());
// Flushing clears the buffer entirely, and stores its aggregated content in the data store.
logs.flush(id);
assertEquals(Optional.empty(), buffer.readLastLogEntryId(id.application(), id.type()));
assertArrayEquals(new long[]{}, buffer.getLogChunkIds(id.application(), id.type()).toArray());
assertEquals(RunLog.empty(), logs.readActive(id.application(), id.type(), -1));
assertEquals(List.of(entry0, entry1, entry2, entry3, entry4),
logs.readFinished(id, -1).get().get(Step.deployReal));
assertEquals(List.of(entry1, entry2, entry3, entry4),
logs.readFinished(id, 0).get().get(Step.deployReal));
assertEquals(List.of(entry2, entry3, entry4),
logs.readFinished(id, 1).get().get(Step.deployReal));
assertEquals(List.of(entry3, entry4),
logs.readFinished(id, 2).get().get(Step.deployReal));
assertEquals(List.of(entry4),
logs.readFinished(id, 3).get().get(Step.deployReal));
assertEquals(List.of(), logs.readFinished(id, 4).get().get(Step.deployReal));
// Logging a large entry enough times to reach the maximum size causes no further entries to be stored.
List<LogEntry> monsterLog = IntStream.range(0, 2 * maxChunks + 3)
.mapToObj(i -> new LogEntry(i, entry.at(), entry.type(), entry.message()))
.collect(toUnmodifiableList());
List<LogEntry> logged = new ArrayList<>(monsterLog);
logged.remove(logged.size() - 1);
logged.remove(logged.size() - 1);
logged.remove(logged.size() - 1);
logged.add(new LogEntry(2 * maxChunks, entry.at(), LogEntry.Type.warning, "Max log size of " + ((chunkSize * maxChunks) >> 20) + "Mb exceeded; further entries are discarded."));
logs.append(id.application(), id.type(), Step.deployReal, monsterLog);
assertEquals(logged.size(),
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal).size());
assertEquals(logged,
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal));
logs.flush(id);
for (int i = 0; i < 2 * maxChunks + 3; i++)
logs.append(id.application(), id.type(), Step.deployReal, List.of(entry));
assertEquals(logged.size(),
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal).size());
assertEquals(logged,
logs.readActive(id.application(), id.type(), -1).get(Step.deployReal));
}
}
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