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LsmTreeSortWriteAndReadTest.java
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LsmTreeSortWriteAndReadTest.java
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package dbf0.disk_key_value.readwrite.lsmtree.multivalue;
import dbf0.common.Dbf0Util;
import dbf0.common.io.PositionTrackingStream;
import dbf0.disk_key_value.io.MemoryFileOperations;
import dbf0.disk_key_value.readonly.multivalue.KeyMultiValueFileReader;
import dbf0.disk_key_value.readonly.multivalue.RandomAccessKeyMultiValueFileReader;
import dbf0.test.RandomSeed;
import org.apache.commons.lang3.tuple.Pair;
import org.junit.Before;
import org.junit.Test;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.stream.Collectors;
import static dbf0.disk_key_value.readwrite.lsmtree.multivalue.MVLUtil.*;
import static org.assertj.core.api.Assertions.assertThat;
public class LsmTreeSortWriteAndReadTest {
private static final SortAndWriteKeyMultiValues<String, Integer> JOB =
new SortAndWriteKeyMultiValues<>(CONFIGURATION, Integer::compareTo);
@Before public void setUp() {
Dbf0Util.enableConsoleLogging(Level.FINER, true);
}
@Test public void testEmpty() throws IOException {
var results = sortWriteAndRead(new PutAndDeletes<>(1));
assertThat(results).isEmpty();
sanityCheckResults(results);
}
@Test public void testSinglePut() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.put(KEY_A, PUT_1.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(1);
sanityCheckResults(results);
var entry = results.get(0);
assertThat(entry.getKey()).isEqualTo(KEY_A);
assertThat(entry.getValue()).containsExactly(PUT_1);
}
@Test public void testTwoKeyPut() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.put(KEY_A, PUT_1.getValue());
putAndDeletes.put(KEY_B, PUT_2.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(2);
sanityCheckResults(results);
var first = results.get(0);
assertThat(first.getKey()).isEqualTo(KEY_A);
assertThat(first.getValue()).containsExactly(PUT_1);
var second = results.get(1);
assertThat(second.getKey()).isEqualTo(KEY_B);
assertThat(second.getValue()).containsExactly(PUT_2);
}
@Test public void testSingleKeyPutTwoValues() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.put(KEY_A, PUT_1.getValue());
putAndDeletes.put(KEY_A, PUT_2.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(1);
sanityCheckResults(results);
var entry = results.get(0);
assertThat(entry.getKey()).isEqualTo(KEY_A);
assertThat(entry.getValue()).containsExactly(PUT_1, PUT_2);
}
@Test public void testSingleDelete() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.delete(KEY_A, DEL_1.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(1);
sanityCheckResults(results);
var entry = results.get(0);
assertThat(entry.getKey()).isEqualTo(KEY_A);
assertThat(entry.getValue()).containsExactly(DEL_1);
}
@Test public void testPutThenDelete() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.put(KEY_A, DEL_1.getValue());
putAndDeletes.delete(KEY_A, DEL_1.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(1);
sanityCheckResults(results);
var entry = results.get(0);
assertThat(entry.getKey()).isEqualTo(KEY_A);
assertThat(entry.getValue()).containsExactly(DEL_1);
}
@Test public void testDeleteThenPut() throws IOException {
var putAndDeletes = new PutAndDeletes<String, Integer>(1);
putAndDeletes.delete(KEY_A, PUT_1.getValue());
putAndDeletes.put(KEY_A, PUT_1.getValue());
var results = sortWriteAndRead(putAndDeletes);
assertThat(results).hasSize(1);
sanityCheckResults(results);
var entry = results.get(0);
assertThat(entry.getKey()).isEqualTo(KEY_A);
assertThat(entry.getValue()).containsExactly(PUT_1);
}
@Test public void testRandomPutAndDeletes() throws IOException {
var putAndDeletes = randomPutAndDeletes(RandomSeed.CAFE.random());
var expected = computeExpected(putAndDeletes);
var results = sortWriteAndRead(putAndDeletes);
sanityCheckResults(results);
assertThat(results).containsExactlyElementsOf(expected);
}
private void sanityCheckResults(List<Pair<String, List<ValueWrapper<Integer>>>> results) {
assertThat(results).isSortedAccordingTo(Map.Entry.comparingByKey());
results.forEach(pair -> assertThat(pair.getValue()).isSortedAccordingTo(ValueWrapper.comparator(VALUE_COMPARATOR)));
}
private List<Pair<String, List<ValueWrapper<Integer>>>> sortWriteAndRead(PutAndDeletes<String, Integer> putAndDeletes)
throws IOException {
return read(open(sortAndWrite(putAndDeletes).getLeft()));
}
private Pair<MemoryFileOperations, MemoryFileOperations> sortAndWrite(PutAndDeletes<String, Integer> putAndDeletes)
throws IOException {
var dataOps = new MemoryFileOperations("data");
var indexOps = new MemoryFileOperations("index");
try (var dataStream = new PositionTrackingStream(dataOps.createAppendOutputStream())) {
try (var indexStream = new BufferedOutputStream(indexOps.createAppendOutputStream())) {
JOB.sortAndWrite(dataStream, indexStream, putAndDeletes, false);
}
}
return Pair.of(dataOps, indexOps);
}
private KeyMultiValueFileReader<String, ValueWrapper<Integer>> open(MemoryFileOperations dataOps)
throws IOException {
return new KeyMultiValueFileReader<>(
CONFIGURATION.getKeySerialization().getDeserializer(),
CONFIGURATION.getValueSerialization().getDeserializer(),
dataOps.createInputStream()
);
}
private List<Pair<String, List<ValueWrapper<Integer>>>> read(KeyMultiValueFileReader<String, ValueWrapper<Integer>> reader)
throws IOException {
var pairs = new ArrayList<Pair<String, List<ValueWrapper<Integer>>>>(128);
while (true) {
var key = reader.readKey();
if (key == null) {
break;
}
var values = new ArrayList<ValueWrapper<Integer>>(reader.getValuesRemaining());
reader.valueIterator().forEachRemaining(values::add);
pairs.add(Pair.of(key, values));
}
return pairs;
}
private RandomAccessKeyMultiValueFileReader<String, ValueWrapper<Integer>> openRandomAccess(
MemoryFileOperations dataOps, MemoryFileOperations indexOps) throws IOException {
return RandomAccessKeyMultiValueFileReader.open(
CONFIGURATION.getKeySerialization().getDeserializer(),
CONFIGURATION.getValueSerialization().getDeserializer(),
CONFIGURATION.getKeyComparator(),
dataOps, indexOps
);
}
private List<Pair<String, List<ValueWrapper<Integer>>>> computeExpected(PutAndDeletes<String, Integer> putAndDeletes) {
return putAndDeletes.getCombined().asMap().entrySet().stream()
.map(p -> Pair.of(p.getKey(), p.getValue().stream().sorted(ValueWrapper.comparator(VALUE_COMPARATOR))
.collect(Collectors.toList())))
.sorted(Map.Entry.comparingByKey())
.collect(Collectors.toList());
}
}