1802 lines
62 KiB
Java
1802 lines
62 KiB
Java
package it.cavallium.dbengine.database.disk;
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import static io.net5.buffer.Unpooled.wrappedBuffer;
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import static it.cavallium.dbengine.database.LLUtils.MARKER_ROCKSDB;
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import static it.cavallium.dbengine.database.LLUtils.fromByteArray;
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import static java.util.Objects.requireNonNull;
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import static java.util.Objects.requireNonNullElse;
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import io.net5.buffer.api.Buffer;
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import io.net5.buffer.api.BufferAllocator;
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import io.net5.buffer.api.MemoryManager;
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import io.net5.buffer.api.Resource;
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import io.net5.buffer.api.Send;
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import io.net5.buffer.api.internal.ResourceSupport;
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import io.net5.util.internal.PlatformDependent;
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import it.cavallium.dbengine.client.BadBlock;
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import it.cavallium.dbengine.client.DatabaseOptions;
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import it.cavallium.dbengine.database.Column;
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import it.cavallium.dbengine.database.ExtraKeyOperationResult;
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import it.cavallium.dbengine.database.LLDelta;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.LLDictionaryResultType;
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import it.cavallium.dbengine.database.LLEntry;
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import it.cavallium.dbengine.database.LLRange;
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import it.cavallium.dbengine.database.LLSnapshot;
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import it.cavallium.dbengine.database.LLUtils;
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import it.cavallium.dbengine.database.SafeCloseable;
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import it.cavallium.dbengine.database.UpdateMode;
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import it.cavallium.dbengine.database.UpdateReturnMode;
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import it.cavallium.dbengine.database.serialization.BiSerializationFunction;
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import it.cavallium.dbengine.database.serialization.SerializationFunction;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ForkJoinPool;
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import java.util.concurrent.ForkJoinTask;
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import java.util.function.Function;
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import java.util.stream.Collectors;
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import java.util.stream.IntStream;
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import org.apache.commons.lang3.tuple.Pair;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import org.rocksdb.AbstractSlice;
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import org.rocksdb.CappedWriteBatch;
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import org.rocksdb.ColumnFamilyHandle;
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import org.rocksdb.CompactRangeOptions;
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import org.rocksdb.DirectSlice;
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import org.rocksdb.FlushOptions;
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import org.rocksdb.ReadOptions;
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import org.rocksdb.RocksDBException;
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import org.rocksdb.RocksIterator;
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import org.rocksdb.Slice;
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import org.rocksdb.Snapshot;
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import org.rocksdb.TransactionDB;
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import org.rocksdb.TransactionOptions;
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import org.rocksdb.WriteBatch;
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import org.rocksdb.WriteOptions;
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import org.warp.commonutils.concurrency.atomicity.NotAtomic;
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import org.warp.commonutils.log.Logger;
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import org.warp.commonutils.log.LoggerFactory;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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import reactor.core.scheduler.Scheduler;
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import reactor.core.scheduler.Schedulers;
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import reactor.util.function.Tuple2;
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import reactor.util.function.Tuple3;
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import reactor.util.function.Tuple4;
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import reactor.util.function.Tuples;
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@NotAtomic
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public class LLLocalDictionary implements LLDictionary {
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protected static final Logger logger = LoggerFactory.getLogger(LLLocalDictionary.class);
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private static final boolean USE_CURRENT_FASTSIZE_FOR_OLD_SNAPSHOTS = false;
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static final int RESERVED_WRITE_BATCH_SIZE = 2 * 1024 * 1024; // 2MiB
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static final long MAX_WRITE_BATCH_SIZE = 1024L * 1024L * 1024L; // 1GiB
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static final int CAPPED_WRITE_BATCH_CAP = 50000; // 50K operations
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static final int MULTI_GET_WINDOW = 16;
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static final ReadOptions EMPTY_READ_OPTIONS = new UnreleasableReadOptions(new UnmodifiableReadOptions());
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static final WriteOptions EMPTY_WRITE_OPTIONS = new UnreleasableWriteOptions(new UnmodifiableWriteOptions());
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static final WriteOptions BATCH_WRITE_OPTIONS = new UnreleasableWriteOptions(new UnmodifiableWriteOptions());
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static final boolean PREFER_SEEK_TO_FIRST = false;
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/**
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* It used to be false,
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* now it's true to avoid crashes during iterations on completely corrupted files
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*/
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static final boolean VERIFY_CHECKSUMS_WHEN_NOT_NEEDED = true;
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/**
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* Default: true. Use false to debug problems with windowing.
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*/
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static final boolean USE_WINDOW_IN_SET_RANGE = true;
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/**
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* Default: true. Use false to debug problems with write batches.
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*/
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static final boolean USE_WRITE_BATCHES_IN_PUT_MULTI = true;
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/**
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* Default: true. Use false to debug problems with write batches.
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*/
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static final boolean USE_WRITE_BATCHES_IN_SET_RANGE = true;
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/**
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* Default: true. Use false to debug problems with capped write batches.
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*/
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static final boolean USE_CAPPED_WRITE_BATCH_IN_SET_RANGE = true;
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/**
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* Default: true. Use false to debug problems with write batches deletes.
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*/
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static final boolean USE_WRITE_BATCH_IN_SET_RANGE_DELETE = false;
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static final boolean PARALLEL_EXACT_SIZE = true;
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private static final byte[] FIRST_KEY = new byte[]{};
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/**
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* Default: true
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*/
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private static final boolean USE_DIRECT_BUFFER_BOUNDS = true;
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/**
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* 1KiB dummy buffer, write only, used for debugging purposes
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*/
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private static final ByteBuffer DUMMY_WRITE_ONLY_BYTE_BUFFER = ByteBuffer.allocateDirect(1024);
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private final RocksDBColumn db;
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private final ColumnFamilyHandle cfh;
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private final String databaseName;
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private final String columnName;
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private final Scheduler dbScheduler;
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private final Function<LLSnapshot, Snapshot> snapshotResolver;
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private final UpdateMode updateMode;
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private final BufferAllocator alloc;
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private final DatabaseOptions databaseOptions;
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public LLLocalDictionary(
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BufferAllocator allocator,
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@NotNull RocksDBColumn db,
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String databaseName,
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String columnName,
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Scheduler dbScheduler,
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Function<LLSnapshot, Snapshot> snapshotResolver,
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UpdateMode updateMode,
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DatabaseOptions databaseOptions) {
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requireNonNull(db);
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this.db = db;
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this.cfh = db.getColumnFamilyHandle();
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this.databaseName = databaseName;
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this.columnName = columnName;
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this.dbScheduler = dbScheduler;
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this.snapshotResolver = snapshotResolver;
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this.updateMode = updateMode;
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this.databaseOptions = databaseOptions;
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alloc = allocator;
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}
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@Override
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public String getDatabaseName() {
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return databaseName;
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}
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public String getColumnName() {
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return columnName;
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}
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/**
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* Please don't modify the returned ReadOptions!
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* If you want to modify it, wrap it into a new ReadOptions!
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*/
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private ReadOptions resolveSnapshot(LLSnapshot snapshot) {
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if (snapshot != null) {
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return getReadOptions(snapshotResolver.apply(snapshot));
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} else {
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return EMPTY_READ_OPTIONS;
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}
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}
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/**
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* Please don't modify the returned ReadOptions!
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* If you want to modify it, wrap it into a new ReadOptions!
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*/
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private ReadOptions getReadOptions(Snapshot snapshot) {
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if (snapshot != null) {
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return new ReadOptions().setSnapshot(snapshot);
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} else {
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return EMPTY_READ_OPTIONS;
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}
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}
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@Override
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public BufferAllocator getAllocator() {
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return alloc;
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}
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private <T> @NotNull Mono<T> runOnDb(Callable<@Nullable T> callable) {
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return Mono.fromCallable(callable).subscribeOn(dbScheduler);
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}
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@Override
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public Mono<Send<Buffer>> get(@Nullable LLSnapshot snapshot,
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Mono<Send<Buffer>> keyMono,
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boolean existsAlmostCertainly) {
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return Mono.usingWhen(keyMono,
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keySend -> runOnDb(() -> {
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try (var key = keySend.receive()) {
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try {
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Buffer logKey;
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if (logger.isTraceEnabled(MARKER_ROCKSDB)) {
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logKey = key.copy();
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} else {
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logKey = null;
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}
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try (logKey) {
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var readOptions = requireNonNullElse(resolveSnapshot(snapshot), EMPTY_READ_OPTIONS);
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var result = db.get(readOptions, key.send(), existsAlmostCertainly);
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if (logger.isTraceEnabled(MARKER_ROCKSDB)) {
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try (var result2 = result == null ? null : result.receive()) {
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logger.trace(MARKER_ROCKSDB, "Reading {}: {}", LLUtils.toStringSafe(logKey),
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LLUtils.toString(result2));
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return result2 == null ? null : result2.send();
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}
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} else {
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return result;
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}
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}
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} catch (Exception ex) {
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throw new IOException("Failed to read " + LLUtils.toStringSafe(key), ex);
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}
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}
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}).onErrorMap(cause -> new IOException("Failed to read", cause)),
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keySend -> Mono.fromRunnable(keySend::close)
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);
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}
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@Override
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public Mono<Boolean> isRangeEmpty(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
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return Mono.usingWhen(rangeMono,
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rangeSend -> {
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try (var range = rangeSend.receive()) {
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if (range.isSingle()) {
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return this.containsKey(snapshot, Mono.fromCallable(range::getSingle));
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} else {
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return this.containsRange(snapshot, rangeMono);
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}
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}
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},
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rangeSend -> Mono.fromRunnable(rangeSend::close)
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).map(isContained -> !isContained);
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}
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public Mono<Boolean> containsRange(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
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return Mono.usingWhen(rangeMono,
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rangeSend -> runOnDb(() -> {
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// Temporary resources to release after finished
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Buffer cloned1 = null;
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Buffer cloned2 = null;
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Buffer cloned3 = null;
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ByteBuffer direct1 = null;
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ByteBuffer direct2 = null;
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ByteBuffer direct3 = null;
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AbstractSlice<?> slice1 = null;
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AbstractSlice<?> slice2 = null;
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try {
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try (var range = rangeSend.receive()) {
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if (Schedulers.isInNonBlockingThread()) {
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throw new UnsupportedOperationException("Called containsRange in a nonblocking thread");
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}
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try (var readOpts = new ReadOptions(resolveSnapshot(snapshot))) {
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readOpts.setVerifyChecksums(VERIFY_CHECKSUMS_WHEN_NOT_NEEDED);
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readOpts.setFillCache(false);
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if (range.hasMin()) {
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try (var rangeMin = range.getMin().receive()) {
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if (databaseOptions.allowNettyDirect()) {
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var directBuf = LLUtils.convertToReadableDirect(alloc, rangeMin.send());
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cloned1 = directBuf.buffer().receive();
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direct1 = directBuf.byteBuffer();
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readOpts.setIterateLowerBound(slice1 = new DirectSlice(directBuf.byteBuffer()));
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} else {
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readOpts.setIterateLowerBound(slice1 = new Slice(LLUtils.toArray(rangeMin)));
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}
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}
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}
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if (range.hasMax()) {
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try (var rangeMax = range.getMax().receive()) {
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if (databaseOptions.allowNettyDirect()) {
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var directBuf = LLUtils.convertToReadableDirect(alloc, rangeMax.send());
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cloned2 = directBuf.buffer().receive();
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direct2 = directBuf.byteBuffer();
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readOpts.setIterateUpperBound(slice2 = new DirectSlice(directBuf.byteBuffer()));
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} else {
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readOpts.setIterateUpperBound(slice2 = new Slice(LLUtils.toArray(rangeMax)));
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}
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}
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}
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try (RocksIterator rocksIterator = db.newIterator(readOpts)) {
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if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
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try (var rangeMin = range.getMin().receive()) {
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if (databaseOptions.allowNettyDirect()) {
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var directBuf = LLUtils.convertToReadableDirect(alloc, rangeMin.send());
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cloned3 = directBuf.buffer().receive();
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direct3 = directBuf.byteBuffer();
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rocksIterator.seek(directBuf.byteBuffer());
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} else {
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rocksIterator.seek(LLUtils.toArray(rangeMin));
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}
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}
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} else {
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rocksIterator.seekToFirst();
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}
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rocksIterator.status();
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return rocksIterator.isValid();
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}
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}
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}
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} finally {
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if (cloned1 != null) cloned1.close();
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if (cloned2 != null) cloned2.close();
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if (cloned3 != null) cloned3.close();
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if (direct1 != null) PlatformDependent.freeDirectBuffer(direct1);
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if (direct2 != null) PlatformDependent.freeDirectBuffer(direct2);
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if (direct3 != null) PlatformDependent.freeDirectBuffer(direct3);
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if (slice1 != null) slice1.close();
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if (slice2 != null) slice2.close();
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}
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}).onErrorMap(cause -> new IOException("Failed to read range", cause)),
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rangeSend -> Mono.fromRunnable(rangeSend::close));
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}
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private Mono<Boolean> containsKey(@Nullable LLSnapshot snapshot, Mono<Send<Buffer>> keyMono) {
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return Mono.usingWhen(keyMono,
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keySend -> runOnDb(() -> {
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var unmodifiableReadOpts = resolveSnapshot(snapshot);
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return db.exists(unmodifiableReadOpts, keySend);
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}).onErrorMap(cause -> new IOException("Failed to read", cause)),
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keySend -> Mono.fromRunnable(keySend::close)
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);
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}
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@Override
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public Mono<Send<Buffer>> put(Mono<Send<Buffer>> keyMono,
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Mono<Send<Buffer>> valueMono,
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LLDictionaryResultType resultType) {
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return Mono.usingWhen(keyMono,
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keySend -> this
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.getPreviousData(keyMono, resultType, false)
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.concatWith(Mono.usingWhen(valueMono,
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valueSend -> this.<Send<Buffer>>runOnDb(() -> {
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try (var key = keySend.receive()) {
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try (var value = valueSend.receive()) {
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assert key.isAccessible();
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assert value.isAccessible();
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if (logger.isTraceEnabled()) {
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logger.trace(MARKER_ROCKSDB, "Writing {}: {}",
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LLUtils.toStringSafe(key), LLUtils.toStringSafe(value));
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}
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db.put(EMPTY_WRITE_OPTIONS, key.send(), value.send());
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return null;
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}
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}
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}),
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value -> Mono.fromRunnable(value::close)
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).onErrorMap(cause -> new IOException("Failed to write", cause)))
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.singleOrEmpty(),
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keySend -> Mono.fromRunnable(keySend::close)
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);
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}
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@Override
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public Mono<UpdateMode> getUpdateMode() {
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return Mono.fromSupplier(() -> updateMode);
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}
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@SuppressWarnings("DuplicatedCode")
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@Override
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public Mono<Send<Buffer>> update(Mono<Send<Buffer>> keyMono,
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SerializationFunction<@Nullable Send<Buffer>, @Nullable Send<Buffer>> updater,
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UpdateReturnMode updateReturnMode,
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boolean existsAlmostCertainly) {
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return Mono.usingWhen(keyMono, keySend -> runOnDb(() -> {
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if (Schedulers.isInNonBlockingThread()) {
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throw new UnsupportedOperationException("Called update in a nonblocking thread");
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}
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if (updateMode == UpdateMode.DISALLOW) {
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throw new UnsupportedOperationException("update() is disallowed");
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}
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UpdateAtomicResultMode returnMode = switch (updateReturnMode) {
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case NOTHING -> UpdateAtomicResultMode.NOTHING;
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case GET_NEW_VALUE -> UpdateAtomicResultMode.CURRENT;
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case GET_OLD_VALUE -> UpdateAtomicResultMode.PREVIOUS;
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};
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UpdateAtomicResult result = db.updateAtomic(EMPTY_READ_OPTIONS, EMPTY_WRITE_OPTIONS, keySend, updater,
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existsAlmostCertainly, returnMode);
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return switch (updateReturnMode) {
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case NOTHING -> null;
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case GET_NEW_VALUE -> ((UpdateAtomicResultCurrent) result).current();
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case GET_OLD_VALUE -> ((UpdateAtomicResultPrevious) result).previous();
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};
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}).onErrorMap(cause -> new IOException("Failed to read or write", cause)),
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keySend -> Mono.fromRunnable(keySend::close));
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}
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@SuppressWarnings("DuplicatedCode")
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@Override
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public Mono<Send<LLDelta>> updateAndGetDelta(Mono<Send<Buffer>> keyMono,
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SerializationFunction<@Nullable Send<Buffer>, @Nullable Send<Buffer>> updater,
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boolean existsAlmostCertainly) {
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return Mono.usingWhen(keyMono, keySend -> runOnDb(() -> {
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if (Schedulers.isInNonBlockingThread()) {
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keySend.close();
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throw new UnsupportedOperationException("Called update in a nonblocking thread");
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}
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if (updateMode == UpdateMode.DISALLOW) {
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keySend.close();
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throw new UnsupportedOperationException("update() is disallowed");
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}
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if (updateMode == UpdateMode.ALLOW && !db.supportsTransactions()) {
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throw new UnsupportedOperationException("update() is disallowed because the database doesn't support"
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+ "safe atomic operations");
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}
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UpdateAtomicResult result = db.updateAtomic(EMPTY_READ_OPTIONS, EMPTY_WRITE_OPTIONS, keySend, updater,
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existsAlmostCertainly, UpdateAtomicResultMode.DELTA);
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return ((UpdateAtomicResultDelta) result).delta();
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}).onErrorMap(cause -> new IOException("Failed to read or write", cause)),
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keySend -> Mono.fromRunnable(keySend::close));
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}
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@Override
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public Mono<Send<Buffer>> remove(Mono<Send<Buffer>> keyMono, LLDictionaryResultType resultType) {
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return Mono.usingWhen(keyMono,
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keySend -> this
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.getPreviousData(keyMono, resultType, true)
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.concatWith(this
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.<Send<Buffer>>runOnDb(() -> {
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try (keySend) {
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if (logger.isTraceEnabled()) {
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try (var key = keySend.receive()) {
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logger.trace(MARKER_ROCKSDB, "Deleting {}", LLUtils.toStringSafe(key));
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db.delete(EMPTY_WRITE_OPTIONS, key.send());
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}
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return null;
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} else {
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db.delete(EMPTY_WRITE_OPTIONS, keySend);
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return null;
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}
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}
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})
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.onErrorMap(cause -> new IOException("Failed to delete", cause))
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)
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.singleOrEmpty(),
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keySend -> Mono.fromRunnable(keySend::close)
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);
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}
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private Mono<Send<Buffer>> getPreviousData(Mono<Send<Buffer>> keyMono, LLDictionaryResultType resultType,
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boolean existsAlmostCertainly) {
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return switch (resultType) {
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case PREVIOUS_VALUE_EXISTENCE -> this
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.containsKey(null, keyMono)
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.single()
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.map((Boolean bool) -> LLUtils.booleanToResponseByteBuffer(alloc, bool));
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case PREVIOUS_VALUE -> Mono.usingWhen(
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keyMono,
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keySend -> this
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.runOnDb(() -> {
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try (keySend) {
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if (Schedulers.isInNonBlockingThread()) {
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throw new UnsupportedOperationException("Called getPreviousData in a nonblocking thread");
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}
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|
if (logger.isTraceEnabled()) {
|
|
try (var key = keySend.receive()) {
|
|
var keyString = LLUtils.toStringSafe(key);
|
|
var result = db.get(EMPTY_READ_OPTIONS, key.send(), existsAlmostCertainly);
|
|
try (var bufferResult = result == null ? null : result.receive()) {
|
|
logger.trace(MARKER_ROCKSDB, "Reading {}: {}", keyString, LLUtils.toStringSafe(bufferResult));
|
|
return bufferResult == null ? null : bufferResult.send();
|
|
}
|
|
}
|
|
} else {
|
|
return db.get(EMPTY_READ_OPTIONS, keySend, existsAlmostCertainly);
|
|
}
|
|
}
|
|
})
|
|
.onErrorMap(cause -> new IOException("Failed to read ", cause)),
|
|
keySend -> Mono.fromRunnable(keySend::close));
|
|
case VOID -> Mono.empty();
|
|
};
|
|
}
|
|
|
|
@Override
|
|
public <K> Flux<Tuple3<K, Send<Buffer>, Optional<Send<Buffer>>>> getMulti(@Nullable LLSnapshot snapshot,
|
|
Flux<Tuple2<K, Send<Buffer>>> keys,
|
|
boolean existsAlmostCertainly) {
|
|
return keys
|
|
.buffer(MULTI_GET_WINDOW)
|
|
.doOnDiscard(Tuple2.class, discardedEntry -> {
|
|
if (discardedEntry.getT2() instanceof Resource<?> resource) {
|
|
resource.close();
|
|
}
|
|
})
|
|
.doOnDiscard(Tuple3.class, discardedEntry -> {
|
|
if (discardedEntry.getT2() instanceof Resource<?> resource) {
|
|
resource.close();
|
|
}
|
|
if (discardedEntry.getT3() instanceof Resource<?> resource) {
|
|
resource.close();
|
|
}
|
|
})
|
|
.flatMapSequential(keysWindow -> {
|
|
List<Send<Buffer>> keyBufsWindowSend = new ArrayList<>(keysWindow.size());
|
|
for (Tuple2<K, Send<Buffer>> objects : keysWindow) {
|
|
keyBufsWindowSend.add(objects.getT2());
|
|
}
|
|
return runOnDb(() -> {
|
|
List<Buffer> keyBufsWindow = new ArrayList<>(keyBufsWindowSend.size());
|
|
for (Send<Buffer> bufferSend : keyBufsWindowSend) {
|
|
keyBufsWindow.add(bufferSend.receive());
|
|
}
|
|
try {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called getMulti in a nonblocking thread");
|
|
}
|
|
var readOptions = Objects.requireNonNullElse(resolveSnapshot(snapshot), EMPTY_READ_OPTIONS);
|
|
List<byte[]> results = db.multiGetAsList(readOptions, LLUtils.toArray(keyBufsWindow));
|
|
var mappedResults = new ArrayList<Tuple3<K, Send<Buffer>, Optional<Send<Buffer>>>>(results.size());
|
|
for (int i = 0; i < results.size(); i++) {
|
|
byte[] val = results.get(i);
|
|
Optional<Buffer> valueOpt;
|
|
if (val != null) {
|
|
results.set(i, null);
|
|
valueOpt = Optional.of(LLUtils.fromByteArray(alloc, val));
|
|
} else {
|
|
valueOpt = Optional.empty();
|
|
}
|
|
mappedResults.add(Tuples.of(keysWindow.get(i).getT1(),
|
|
keyBufsWindow.get(i).send(),
|
|
valueOpt.map(Resource::send)
|
|
));
|
|
}
|
|
return mappedResults;
|
|
} finally {
|
|
for (Buffer buffer : keyBufsWindow) {
|
|
buffer.close();
|
|
}
|
|
}
|
|
})
|
|
.flatMapIterable(list -> list)
|
|
.onErrorMap(cause -> new IOException("Failed to read keys", cause))
|
|
.doAfterTerminate(() -> keyBufsWindowSend.forEach(Send::close));
|
|
}, 2) // Max concurrency is 2 to read data while preparing the next segment
|
|
.doOnDiscard(LLEntry.class, ResourceSupport::close)
|
|
.doOnDiscard(Tuple3.class, discardedEntry -> {
|
|
if (discardedEntry.getT2() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
if (discardedEntry.getT2() instanceof Optional opt) {
|
|
if (opt.isPresent() && opt.get() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public Flux<Send<LLEntry>> putMulti(Flux<Send<LLEntry>> entries, boolean getOldValues) {
|
|
return entries
|
|
.buffer(Math.min(MULTI_GET_WINDOW, CAPPED_WRITE_BATCH_CAP))
|
|
.flatMapSequential(ew -> Mono
|
|
.<List<Send<LLEntry>>>fromCallable(() -> {
|
|
var entriesWindow = new ArrayList<LLEntry>(ew.size());
|
|
for (Send<LLEntry> entrySend : ew) {
|
|
entriesWindow.add(entrySend.receive());
|
|
}
|
|
try {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called putMulti in a nonblocking thread");
|
|
}
|
|
ArrayList<Send<LLEntry>> oldValues;
|
|
if (getOldValues) {
|
|
oldValues = new ArrayList<>(entriesWindow.size());
|
|
try (var readOptions = resolveSnapshot(null)) {
|
|
for (LLEntry entry : entriesWindow) {
|
|
try (var key = entry.getKey().receive()) {
|
|
Send<Buffer> oldValue = db.get(readOptions, key.copy().send(), false);
|
|
if (oldValue != null) {
|
|
oldValues.add(LLEntry.of(key.send(), oldValue).send());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
oldValues = null;
|
|
}
|
|
if (USE_WRITE_BATCHES_IN_PUT_MULTI) {
|
|
var batch = new CappedWriteBatch(db,
|
|
alloc,
|
|
CAPPED_WRITE_BATCH_CAP,
|
|
RESERVED_WRITE_BATCH_SIZE,
|
|
MAX_WRITE_BATCH_SIZE,
|
|
BATCH_WRITE_OPTIONS
|
|
);
|
|
for (LLEntry entry : entriesWindow) {
|
|
var k = entry.getKey();
|
|
var v = entry.getValue();
|
|
if (databaseOptions.allowNettyDirect()) {
|
|
batch.put(cfh, k, v);
|
|
} else {
|
|
try (var key = k.receive()) {
|
|
try (var value = v.receive()) {
|
|
batch.put(cfh, LLUtils.toArray(key), LLUtils.toArray(value));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
batch.writeToDbAndClose();
|
|
batch.close();
|
|
} else {
|
|
for (LLEntry entry : entriesWindow) {
|
|
db.put(EMPTY_WRITE_OPTIONS, entry.getKey(), entry.getValue());
|
|
}
|
|
}
|
|
return oldValues;
|
|
} finally {
|
|
for (LLEntry llEntry : entriesWindow) {
|
|
llEntry.close();
|
|
}
|
|
}
|
|
}).subscribeOn(dbScheduler), 2) // Max concurrency is 2 to read data while preparing the next segment
|
|
.flatMapIterable(oldValuesList -> oldValuesList)
|
|
.transform(LLUtils::handleDiscard);
|
|
}
|
|
|
|
@Override
|
|
public <X> Flux<ExtraKeyOperationResult<Send<Buffer>, X>> updateMulti(Flux<Tuple2<Send<Buffer>, X>> entries,
|
|
BiSerializationFunction<Send<Buffer>, X, Send<Buffer>> updateFunction) {
|
|
return entries
|
|
.buffer(Math.min(MULTI_GET_WINDOW, CAPPED_WRITE_BATCH_CAP))
|
|
.flatMapSequential(ew -> this.<List<ExtraKeyOperationResult<Send<Buffer>, X>>>runOnDb(() -> {
|
|
List<Tuple2<Buffer, X>> entriesWindow = new ArrayList<>(ew.size());
|
|
for (Tuple2<Send<Buffer>, X> tuple : ew) {
|
|
entriesWindow.add(tuple.mapT1(Send::receive));
|
|
}
|
|
try {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called updateMulti in a nonblocking thread");
|
|
}
|
|
List<Buffer> keyBufsWindow = new ArrayList<>(entriesWindow.size());
|
|
for (Tuple2<Buffer, X> objects : entriesWindow) {
|
|
keyBufsWindow.add(objects.getT1());
|
|
}
|
|
ArrayList<Tuple3<Send<Buffer>, X, Optional<Send<Buffer>>>> mappedInputs;
|
|
{
|
|
var readOptions = Objects.requireNonNullElse(resolveSnapshot(null), EMPTY_READ_OPTIONS);
|
|
var inputs = db.multiGetAsList(readOptions, LLUtils.toArray(keyBufsWindow));
|
|
mappedInputs = new ArrayList<>(inputs.size());
|
|
for (int i = 0; i < inputs.size(); i++) {
|
|
var val = inputs.get(i);
|
|
if (val != null) {
|
|
inputs.set(i, null);
|
|
mappedInputs.add(Tuples.of(
|
|
keyBufsWindow.get(i).send(),
|
|
entriesWindow.get(i).getT2(),
|
|
Optional.of(fromByteArray(alloc, val).send())
|
|
));
|
|
} else {
|
|
mappedInputs.add(Tuples.of(
|
|
keyBufsWindow.get(i).send(),
|
|
entriesWindow.get(i).getT2(),
|
|
Optional.empty()
|
|
));
|
|
}
|
|
}
|
|
}
|
|
var updatedValuesToWrite = new ArrayList<Send<Buffer>>(mappedInputs.size());
|
|
var valueChangedResult = new ArrayList<ExtraKeyOperationResult<Send<Buffer>, X>>(mappedInputs.size());
|
|
try {
|
|
for (var mappedInput : mappedInputs) {
|
|
try (var updatedValue = updateFunction
|
|
.apply(mappedInput.getT1(), mappedInput.getT2()).receive()) {
|
|
try (var t3 = mappedInput.getT3().map(Send::receive).orElse(null)) {
|
|
valueChangedResult.add(new ExtraKeyOperationResult<>(mappedInput.getT1(),
|
|
mappedInput.getT2(), !LLUtils.equals(t3, updatedValue)));
|
|
}
|
|
updatedValuesToWrite.add(updatedValue.send());
|
|
}
|
|
}
|
|
} finally {
|
|
for (var mappedInput : mappedInputs) {
|
|
mappedInput.getT3().ifPresent(Send::close);
|
|
}
|
|
}
|
|
|
|
if (USE_WRITE_BATCHES_IN_PUT_MULTI) {
|
|
var batch = new CappedWriteBatch(db,
|
|
alloc,
|
|
CAPPED_WRITE_BATCH_CAP,
|
|
RESERVED_WRITE_BATCH_SIZE,
|
|
MAX_WRITE_BATCH_SIZE,
|
|
BATCH_WRITE_OPTIONS
|
|
);
|
|
int i = 0;
|
|
for (Tuple2<Buffer, X> entry : entriesWindow) {
|
|
var valueToWrite = updatedValuesToWrite.get(i);
|
|
if (valueToWrite == null) {
|
|
batch.delete(cfh, entry.getT1().send());
|
|
} else {
|
|
batch.put(cfh, entry.getT1().send(), valueToWrite);
|
|
}
|
|
i++;
|
|
}
|
|
batch.writeToDbAndClose();
|
|
batch.close();
|
|
} else {
|
|
int i = 0;
|
|
for (Tuple2<Buffer, X> entry : entriesWindow) {
|
|
db.put(EMPTY_WRITE_OPTIONS, entry.getT1().send(), updatedValuesToWrite.get(i));
|
|
i++;
|
|
}
|
|
}
|
|
return valueChangedResult;
|
|
} finally {
|
|
for (Tuple2<Buffer, X> tuple : entriesWindow) {
|
|
tuple.getT1().close();
|
|
}
|
|
}
|
|
}).flatMapIterable(list -> list), /* Max concurrency is 2 to update data while preparing the next segment */ 2)
|
|
.doOnDiscard(Tuple2.class, entry -> {
|
|
if (entry.getT1() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
if (entry.getT2() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
})
|
|
.doOnDiscard(ExtraKeyOperationResult.class, entry -> {
|
|
if (entry.key() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
if (entry.extra() instanceof Buffer bb) {
|
|
bb.close();
|
|
}
|
|
})
|
|
.doOnDiscard(List.class, obj -> {
|
|
if (!obj.isEmpty() && obj.get(0) instanceof ExtraKeyOperationResult<?, ?>) {
|
|
//noinspection unchecked
|
|
var castedEntries = (List<ExtraKeyOperationResult<?, ?>>) obj;
|
|
for (ExtraKeyOperationResult<?, ?> entry : castedEntries) {
|
|
if (entry.key() instanceof Resource<?> bb) {
|
|
bb.close();
|
|
}
|
|
if (entry.extra() instanceof Resource<?> bb) {
|
|
bb.close();
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public Flux<Send<LLEntry>> getRange(@Nullable LLSnapshot snapshot,
|
|
Mono<Send<LLRange>> rangeMono,
|
|
boolean existsAlmostCertainly) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (range.isSingle()) {
|
|
var rangeSingleMono = rangeMono.map(r -> r.receive().getSingle());
|
|
return getRangeSingle(snapshot, rangeSingleMono, existsAlmostCertainly);
|
|
} else {
|
|
return getRangeMulti(snapshot, rangeMono);
|
|
}
|
|
}
|
|
},
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Flux<List<Send<LLEntry>>> getRangeGrouped(@Nullable LLSnapshot snapshot,
|
|
Mono<Send<LLRange>> rangeMono,
|
|
int prefixLength, boolean existsAlmostCertainly) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (range.isSingle()) {
|
|
var rangeSingleMono = rangeMono.map(r -> r.receive().getSingle());
|
|
return getRangeSingle(snapshot, rangeSingleMono, existsAlmostCertainly).map(List::of);
|
|
} else {
|
|
return getRangeMultiGrouped(snapshot, rangeMono, prefixLength);
|
|
}
|
|
}
|
|
},
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
private Flux<Send<LLEntry>> getRangeSingle(LLSnapshot snapshot,
|
|
Mono<Send<Buffer>> keyMono,
|
|
boolean existsAlmostCertainly) {
|
|
return Mono
|
|
.zip(keyMono, this.get(snapshot, keyMono, existsAlmostCertainly))
|
|
.map(result -> LLEntry.of(result.getT1(), result.getT2()).send())
|
|
.flux()
|
|
.transform(LLUtils::handleDiscard);
|
|
}
|
|
|
|
private Flux<Send<LLEntry>> getRangeMulti(LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux.using(
|
|
() -> new LLLocalEntryReactiveRocksIterator(db, rangeSend,
|
|
databaseOptions.allowNettyDirect(), resolveSnapshot(snapshot)),
|
|
iterator -> iterator.flux().subscribeOn(dbScheduler, false),
|
|
LLLocalReactiveRocksIterator::close
|
|
).transform(LLUtils::handleDiscard),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
private Flux<List<Send<LLEntry>>> getRangeMultiGrouped(LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono,
|
|
int prefixLength) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux.using(
|
|
() -> new LLLocalGroupedEntryReactiveRocksIterator(db, prefixLength, rangeSend,
|
|
databaseOptions.allowNettyDirect(), resolveSnapshot(snapshot)),
|
|
iterator -> iterator.flux().subscribeOn(dbScheduler, false),
|
|
LLLocalGroupedReactiveRocksIterator::close
|
|
).transform(LLUtils::handleDiscard),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Flux<Send<Buffer>> getRangeKeys(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (range.isSingle()) {
|
|
return this.getRangeKeysSingle(snapshot, rangeMono.map(r -> r.receive().getSingle()));
|
|
} else {
|
|
return this.getRangeKeysMulti(snapshot, rangeMono);
|
|
}
|
|
}
|
|
},
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Flux<List<Send<Buffer>>> getRangeKeysGrouped(@Nullable LLSnapshot snapshot,
|
|
Mono<Send<LLRange>> rangeMono,
|
|
int prefixLength) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux.using(
|
|
() -> new LLLocalGroupedKeyReactiveRocksIterator(db, prefixLength, rangeSend,
|
|
databaseOptions.allowNettyDirect(), resolveSnapshot(snapshot)),
|
|
iterator -> iterator.flux().subscribeOn(dbScheduler, false),
|
|
LLLocalGroupedReactiveRocksIterator::close
|
|
).transform(LLUtils::handleDiscard),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Flux<BadBlock> badBlocks(Mono<Send<LLRange>> rangeMono) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux
|
|
.<BadBlock>create(sink -> {
|
|
var range = rangeSend.receive();
|
|
sink.onDispose(range::close);
|
|
try (var ro = new ReadOptions(getReadOptions(null))) {
|
|
ro.setFillCache(false);
|
|
if (!range.isSingle()) {
|
|
ro.setReadaheadSize(32 * 1024);
|
|
}
|
|
ro.setVerifyChecksums(true);
|
|
var rocksIteratorTuple = getRocksIterator(alloc,
|
|
databaseOptions.allowNettyDirect(), ro, range.send(), db
|
|
);
|
|
try {
|
|
try (var rocksIterator = rocksIteratorTuple.getT1()) {
|
|
rocksIterator.seekToFirst();
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid() && !sink.isCancelled()) {
|
|
try {
|
|
rocksIterator.status();
|
|
rocksIterator.key(DUMMY_WRITE_ONLY_BYTE_BUFFER);
|
|
rocksIterator.status();
|
|
rocksIterator.value(DUMMY_WRITE_ONLY_BYTE_BUFFER);
|
|
rocksIterator.status();
|
|
} catch (RocksDBException ex) {
|
|
sink.next(new BadBlock(databaseName, Column.special(columnName), null, ex));
|
|
}
|
|
rocksIterator.next();
|
|
}
|
|
}
|
|
} finally {
|
|
rocksIteratorTuple.getT2().close();
|
|
rocksIteratorTuple.getT3().close();
|
|
rocksIteratorTuple.getT4().close();
|
|
}
|
|
sink.complete();
|
|
} catch (Throwable ex) {
|
|
sink.error(ex);
|
|
}
|
|
})
|
|
.subscribeOn(dbScheduler),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Flux<Send<Buffer>> getRangeKeyPrefixes(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono,
|
|
int prefixLength) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux
|
|
.using(
|
|
() -> new LLLocalKeyPrefixReactiveRocksIterator(db,
|
|
prefixLength,
|
|
rangeSend,
|
|
databaseOptions.allowNettyDirect(),
|
|
resolveSnapshot(snapshot),
|
|
true
|
|
),
|
|
LLLocalKeyPrefixReactiveRocksIterator::flux,
|
|
LLLocalKeyPrefixReactiveRocksIterator::close
|
|
)
|
|
.subscribeOn(dbScheduler),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
private Flux<Send<Buffer>> getRangeKeysSingle(LLSnapshot snapshot, Mono<Send<Buffer>> keyMono) {
|
|
return Flux.usingWhen(keyMono,
|
|
keySend -> this
|
|
.containsKey(snapshot, keyMono)
|
|
.<Send<Buffer>>handle((contains, sink) -> {
|
|
if (contains) {
|
|
sink.next(keySend);
|
|
} else {
|
|
sink.complete();
|
|
}
|
|
})
|
|
.flux()
|
|
.doOnDiscard(Buffer.class, Buffer::close),
|
|
keySend -> Mono.fromRunnable(keySend::close)
|
|
);
|
|
}
|
|
|
|
private Flux<Send<Buffer>> getRangeKeysMulti(LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
|
|
return Flux.usingWhen(rangeMono,
|
|
rangeSend -> Flux.using(
|
|
() -> new LLLocalKeyReactiveRocksIterator(db, rangeSend,
|
|
databaseOptions.allowNettyDirect(), resolveSnapshot(snapshot)
|
|
),
|
|
iterator -> iterator.flux().subscribeOn(dbScheduler, false),
|
|
LLLocalReactiveRocksIterator::close
|
|
).transform(LLUtils::handleDiscard),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Mono<Void> setRange(Mono<Send<LLRange>> rangeMono, Flux<Send<LLEntry>> entries) {
|
|
return Mono.usingWhen(rangeMono,
|
|
rangeSend -> {
|
|
if (USE_WINDOW_IN_SET_RANGE) {
|
|
return this
|
|
.<Void>runOnDb(() -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called setRange in a nonblocking thread");
|
|
}
|
|
if (!USE_WRITE_BATCH_IN_SET_RANGE_DELETE || !USE_WRITE_BATCHES_IN_SET_RANGE) {
|
|
assert EMPTY_READ_OPTIONS.isOwningHandle();
|
|
try (var opts = new ReadOptions(EMPTY_READ_OPTIONS)) {
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(),
|
|
opts,
|
|
IterateBound.LOWER,
|
|
range.getMin()
|
|
);
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(),
|
|
opts,
|
|
IterateBound.UPPER,
|
|
range.getMax()
|
|
);
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
assert cfh.isOwningHandle();
|
|
assert opts.isOwningHandle();
|
|
SafeCloseable seekTo;
|
|
try (RocksIterator it = db.newIterator(opts)) {
|
|
if (!PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(), it, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
it.seekToFirst();
|
|
}
|
|
try {
|
|
it.status();
|
|
while (it.isValid()) {
|
|
db.delete(EMPTY_WRITE_OPTIONS, it.key());
|
|
it.next();
|
|
it.status();
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
} else if (USE_CAPPED_WRITE_BATCH_IN_SET_RANGE) {
|
|
try (var batch = new CappedWriteBatch(db,
|
|
alloc,
|
|
CAPPED_WRITE_BATCH_CAP,
|
|
RESERVED_WRITE_BATCH_SIZE,
|
|
MAX_WRITE_BATCH_SIZE,
|
|
BATCH_WRITE_OPTIONS
|
|
)) {
|
|
if (range.isSingle()) {
|
|
batch.delete(cfh, range.getSingle());
|
|
} else {
|
|
deleteSmallRangeWriteBatch(batch, range.copy().send());
|
|
}
|
|
batch.writeToDbAndClose();
|
|
}
|
|
} else {
|
|
try (var batch = new WriteBatch(RESERVED_WRITE_BATCH_SIZE)) {
|
|
if (range.isSingle()) {
|
|
batch.delete(cfh, LLUtils.toArray(range.getSingleUnsafe()));
|
|
} else {
|
|
deleteSmallRangeWriteBatch(batch, range.copy().send());
|
|
}
|
|
db.write(EMPTY_WRITE_OPTIONS, batch);
|
|
batch.clear();
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
})
|
|
.thenMany(entries.window(MULTI_GET_WINDOW))
|
|
.flatMap(keysWindowFlux -> keysWindowFlux
|
|
.collectList()
|
|
.flatMap(entriesListSend -> this
|
|
.<Void>runOnDb(() -> {
|
|
List<LLEntry> entriesList = new ArrayList<>(entriesListSend.size());
|
|
for (Send<LLEntry> entrySend : entriesListSend) {
|
|
entriesList.add(entrySend.receive());
|
|
}
|
|
try {
|
|
if (!USE_WRITE_BATCHES_IN_SET_RANGE) {
|
|
for (LLEntry entry : entriesList) {
|
|
assert entry.isAccessible();
|
|
db.put(EMPTY_WRITE_OPTIONS, entry.getKey(), entry.getValue());
|
|
}
|
|
} else if (USE_CAPPED_WRITE_BATCH_IN_SET_RANGE) {
|
|
try (var batch = new CappedWriteBatch(db,
|
|
alloc,
|
|
CAPPED_WRITE_BATCH_CAP,
|
|
RESERVED_WRITE_BATCH_SIZE,
|
|
MAX_WRITE_BATCH_SIZE,
|
|
BATCH_WRITE_OPTIONS
|
|
)) {
|
|
for (LLEntry entry : entriesList) {
|
|
assert entry.isAccessible();
|
|
if (databaseOptions.allowNettyDirect()) {
|
|
batch.put(cfh, entry.getKey(), entry.getValue());
|
|
} else {
|
|
batch.put(cfh,
|
|
LLUtils.toArray(entry.getKeyUnsafe()),
|
|
LLUtils.toArray(entry.getValueUnsafe())
|
|
);
|
|
}
|
|
}
|
|
batch.writeToDbAndClose();
|
|
}
|
|
} else {
|
|
try (var batch = new WriteBatch(RESERVED_WRITE_BATCH_SIZE)) {
|
|
for (LLEntry entry : entriesList) {
|
|
assert entry.isAccessible();
|
|
batch.put(cfh, LLUtils.toArray(entry.getKeyUnsafe()),
|
|
LLUtils.toArray(entry.getValueUnsafe()));
|
|
}
|
|
db.write(EMPTY_WRITE_OPTIONS, batch);
|
|
batch.clear();
|
|
}
|
|
}
|
|
return null;
|
|
} finally {
|
|
for (LLEntry entry : entriesList) {
|
|
assert entry.isAccessible();
|
|
entry.close();
|
|
}
|
|
}
|
|
})
|
|
)
|
|
)
|
|
.then()
|
|
.onErrorMap(cause -> new IOException("Failed to write range", cause));
|
|
} else {
|
|
if (USE_WRITE_BATCHES_IN_SET_RANGE) {
|
|
return Mono.fromCallable(() -> {
|
|
throw new UnsupportedOperationException("Can't use write batches in setRange without window."
|
|
+ " Please fix the parameters");
|
|
});
|
|
}
|
|
return this
|
|
.getRange(null, rangeMono, false)
|
|
.flatMap(oldValueSend -> this.<Void>runOnDb(() -> {
|
|
try (var oldValue = oldValueSend.receive()) {
|
|
db.delete(EMPTY_WRITE_OPTIONS, oldValue.getKey());
|
|
return null;
|
|
}
|
|
}))
|
|
.then(entries
|
|
.flatMap(entrySend -> Mono.using(
|
|
entrySend::receive,
|
|
entry -> this
|
|
.put(LLUtils.lazyRetain(entry::getKey), LLUtils.lazyRetain(entry::getValue),
|
|
LLDictionaryResultType.VOID)
|
|
.doOnNext(Send::close),
|
|
ResourceSupport::close
|
|
))
|
|
.then(Mono.<Void>empty())
|
|
)
|
|
.onErrorMap(cause -> new IOException("Failed to write range", cause));
|
|
}
|
|
},
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
//todo: this is broken, check why. (is this still true?)
|
|
private void deleteSmallRangeWriteBatch(CappedWriteBatch writeBatch, Send<LLRange> rangeToReceive)
|
|
throws RocksDBException {
|
|
var range = rangeToReceive.receive();
|
|
try (var readOpts = new ReadOptions(getReadOptions(null))) {
|
|
readOpts.setFillCache(false);
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try (var rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(), rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid()) {
|
|
writeBatch.delete(cfh, LLUtils.readDirectNioBuffer(alloc, rocksIterator::key).send());
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
} catch (Throwable e) {
|
|
range.close();
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
private void deleteSmallRangeWriteBatch(WriteBatch writeBatch, Send<LLRange> rangeToReceive)
|
|
throws RocksDBException {
|
|
try (var range = rangeToReceive.receive()) {
|
|
try (var readOpts = new ReadOptions(getReadOptions(null))) {
|
|
readOpts.setFillCache(false);
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts, IterateBound.UPPER,
|
|
range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try (var rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(), rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid()) {
|
|
writeBatch.delete(cfh, rocksIterator.key());
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Nullable
|
|
private static SafeCloseable rocksIterSeekTo(BufferAllocator alloc, boolean allowNettyDirect,
|
|
RocksIterator rocksIterator, Send<Buffer> bufferToReceive) {
|
|
try (var buffer = bufferToReceive.receive()) {
|
|
if (allowNettyDirect) {
|
|
var direct = LLUtils.convertToReadableDirect(alloc, buffer.send());
|
|
assert direct.byteBuffer().isDirect();
|
|
rocksIterator.seek(direct.byteBuffer());
|
|
return () -> {
|
|
direct.buffer().close();
|
|
PlatformDependent.freeDirectBuffer(direct.byteBuffer());
|
|
};
|
|
} else {
|
|
rocksIterator.seek(LLUtils.toArray(buffer));
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static ReleasableSlice setIterateBound(BufferAllocator alloc, boolean allowNettyDirect,
|
|
ReadOptions readOpts, IterateBound boundType, Send<Buffer> bufferToReceive) {
|
|
var buffer = bufferToReceive.receive();
|
|
try {
|
|
requireNonNull(buffer);
|
|
AbstractSlice<?> slice;
|
|
if (allowNettyDirect && LLLocalDictionary.USE_DIRECT_BUFFER_BOUNDS) {
|
|
var direct = LLUtils.convertToReadableDirect(alloc, buffer.send());
|
|
buffer = direct.buffer().receive();
|
|
assert direct.byteBuffer().isDirect();
|
|
slice = new DirectSlice(direct.byteBuffer(), buffer.readableBytes());
|
|
assert slice.size() == buffer.readableBytes();
|
|
assert slice.compare(new Slice(LLUtils.toArray(buffer))) == 0;
|
|
if (boundType == IterateBound.LOWER) {
|
|
readOpts.setIterateLowerBound(slice);
|
|
} else {
|
|
readOpts.setIterateUpperBound(slice);
|
|
}
|
|
return new ReleasableSliceImpl(slice, buffer, direct.byteBuffer());
|
|
} else {
|
|
try {
|
|
slice = new Slice(requireNonNull(LLUtils.toArray(buffer)));
|
|
if (boundType == IterateBound.LOWER) {
|
|
readOpts.setIterateLowerBound(slice);
|
|
} else {
|
|
readOpts.setIterateUpperBound(slice);
|
|
}
|
|
return new ReleasableSliceImpl(slice, null, null);
|
|
} finally {
|
|
buffer.close();
|
|
}
|
|
}
|
|
} catch (Throwable e) {
|
|
buffer.close();
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
private static ReleasableSlice emptyReleasableSlice() {
|
|
var arr = new byte[0];
|
|
|
|
return new SimpleSliceWithoutRelease(new Slice(arr), null, arr);
|
|
}
|
|
|
|
public static record SimpleSliceWithoutRelease(AbstractSlice<?> slice, @Nullable Buffer byteBuf,
|
|
@Nullable Object additionalData) implements ReleasableSlice {}
|
|
|
|
public static record ReleasableSliceImpl(AbstractSlice<?> slice, @Nullable Buffer byteBuf,
|
|
@Nullable Object additionalData) implements ReleasableSlice {
|
|
|
|
@Override
|
|
public void close() {
|
|
slice.clear();
|
|
slice.close();
|
|
if (byteBuf != null) {
|
|
byteBuf.close();
|
|
}
|
|
if (additionalData instanceof ByteBuffer bb && bb.isDirect()) {
|
|
PlatformDependent.freeDirectBuffer(bb);
|
|
}
|
|
}
|
|
}
|
|
|
|
public Mono<Void> clear() {
|
|
return Mono
|
|
.<Void>fromCallable(() -> {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called clear in a nonblocking thread");
|
|
}
|
|
boolean shouldCompactLater = false;
|
|
try (var readOpts = new ReadOptions(getReadOptions(null))) {
|
|
readOpts.setVerifyChecksums(VERIFY_CHECKSUMS_WHEN_NOT_NEEDED);
|
|
|
|
// readOpts.setIgnoreRangeDeletions(true);
|
|
readOpts.setFillCache(false);
|
|
readOpts.setReadaheadSize(32 * 1024); // 32KiB
|
|
try (CappedWriteBatch writeBatch = new CappedWriteBatch(db,
|
|
alloc,
|
|
CAPPED_WRITE_BATCH_CAP,
|
|
RESERVED_WRITE_BATCH_SIZE,
|
|
MAX_WRITE_BATCH_SIZE,
|
|
BATCH_WRITE_OPTIONS
|
|
)) {
|
|
|
|
byte[] firstDeletedKey = null;
|
|
byte[] lastDeletedKey = null;
|
|
try (RocksIterator rocksIterator = db.newIterator(readOpts)) {
|
|
// If the database supports transactions, delete each key one by one
|
|
if (db.supportsTransactions()) {
|
|
rocksIterator.seekToFirst();
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid()) {
|
|
writeBatch.delete(cfh, rocksIterator.key());
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
}
|
|
} else {
|
|
rocksIterator.seekToLast();
|
|
|
|
rocksIterator.status();
|
|
if (rocksIterator.isValid()) {
|
|
firstDeletedKey = FIRST_KEY;
|
|
lastDeletedKey = rocksIterator.key();
|
|
writeBatch.deleteRange(cfh, FIRST_KEY, rocksIterator.key());
|
|
writeBatch.delete(cfh, rocksIterator.key());
|
|
shouldCompactLater = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
writeBatch.writeToDbAndClose();
|
|
|
|
if (shouldCompactLater) {
|
|
// Compact range
|
|
db.suggestCompactRange();
|
|
if (lastDeletedKey != null) {
|
|
db.compactRange(firstDeletedKey, lastDeletedKey, new CompactRangeOptions()
|
|
.setAllowWriteStall(false)
|
|
.setExclusiveManualCompaction(false)
|
|
.setChangeLevel(false)
|
|
);
|
|
}
|
|
}
|
|
|
|
db.flush(new FlushOptions().setWaitForFlush(true).setAllowWriteStall(true));
|
|
db.flushWal(true);
|
|
}
|
|
return null;
|
|
}
|
|
})
|
|
.onErrorMap(cause -> new IOException("Failed to clear", cause))
|
|
.subscribeOn(dbScheduler);
|
|
|
|
}
|
|
|
|
@Override
|
|
public Mono<Long> sizeRange(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono, boolean fast) {
|
|
return Mono.usingWhen(rangeMono, rangeSend -> runOnDb(() -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called sizeRange in a nonblocking thread");
|
|
}
|
|
if (range.isAll()) {
|
|
return fast ? fastSizeAll(snapshot) : exactSizeAll(snapshot);
|
|
} else {
|
|
try (var readOpts = new ReadOptions(resolveSnapshot(snapshot))) {
|
|
readOpts.setFillCache(false);
|
|
readOpts.setVerifyChecksums(VERIFY_CHECKSUMS_WHEN_NOT_NEEDED);
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
if (fast) {
|
|
readOpts.setIgnoreRangeDeletions(true);
|
|
|
|
}
|
|
try (var rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(),
|
|
rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
long i = 0;
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid()) {
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
i++;
|
|
}
|
|
return i;
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}).onErrorMap(cause -> new IOException("Failed to get size of range", cause)),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close));
|
|
}
|
|
|
|
@Override
|
|
public Mono<Send<LLEntry>> getOne(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
|
|
return Mono.usingWhen(rangeMono,
|
|
rangeSend -> runOnDb(() -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called getOne in a nonblocking thread");
|
|
}
|
|
try (var readOpts = new ReadOptions(resolveSnapshot(snapshot))) {
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try (var rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(),
|
|
rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
rocksIterator.status();
|
|
if (rocksIterator.isValid()) {
|
|
try (var key = LLUtils.readDirectNioBuffer(alloc, rocksIterator::key)) {
|
|
try (var value = LLUtils.readDirectNioBuffer(alloc, rocksIterator::value)) {
|
|
return LLEntry.of(key.send(), value.send()).send();
|
|
}
|
|
}
|
|
} else {
|
|
return null;
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
}
|
|
}),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public Mono<Send<Buffer>> getOneKey(@Nullable LLSnapshot snapshot, Mono<Send<LLRange>> rangeMono) {
|
|
return Mono.usingWhen(rangeMono,
|
|
rangeSend -> runOnDb(() -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called getOneKey in a nonblocking thread");
|
|
}
|
|
try (var readOpts = new ReadOptions(resolveSnapshot(snapshot))) {
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try (var rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(),
|
|
rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
rocksIterator.status();
|
|
if (rocksIterator.isValid()) {
|
|
return LLUtils.readDirectNioBuffer(alloc, rocksIterator::key).send();
|
|
} else {
|
|
return null;
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
}
|
|
}),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
private long fastSizeAll(@Nullable LLSnapshot snapshot) throws RocksDBException {
|
|
try (var rocksdbSnapshot = new ReadOptions(resolveSnapshot(snapshot))) {
|
|
if (USE_CURRENT_FASTSIZE_FOR_OLD_SNAPSHOTS || rocksdbSnapshot.snapshot() == null) {
|
|
try {
|
|
return db.getLongProperty("rocksdb.estimate-num-keys");
|
|
} catch (RocksDBException e) {
|
|
logger.error(MARKER_ROCKSDB, "Failed to get RocksDB estimated keys count property", e);
|
|
return 0;
|
|
}
|
|
} else if (PARALLEL_EXACT_SIZE) {
|
|
return exactSizeAll(snapshot);
|
|
} else {
|
|
rocksdbSnapshot.setFillCache(false);
|
|
rocksdbSnapshot.setVerifyChecksums(VERIFY_CHECKSUMS_WHEN_NOT_NEEDED);
|
|
rocksdbSnapshot.setIgnoreRangeDeletions(true);
|
|
long count = 0;
|
|
try (RocksIterator rocksIterator = db.newIterator(rocksdbSnapshot)) {
|
|
rocksIterator.seekToFirst();
|
|
rocksIterator.status();
|
|
// If it's a fast size of a snapshot, count only up to 100'000 elements
|
|
while (rocksIterator.isValid() && count < 100_000) {
|
|
count++;
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
}
|
|
return count;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private long exactSizeAll(@Nullable LLSnapshot snapshot) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called exactSizeAll in a nonblocking thread");
|
|
}
|
|
try (var readOpts = new ReadOptions(resolveSnapshot(snapshot))) {
|
|
readOpts.setFillCache(false);
|
|
readOpts.setReadaheadSize(32 * 1024); // 32KiB
|
|
readOpts.setVerifyChecksums(VERIFY_CHECKSUMS_WHEN_NOT_NEEDED);
|
|
|
|
if (PARALLEL_EXACT_SIZE) {
|
|
var commonPool = ForkJoinPool.commonPool();
|
|
var futures = IntStream
|
|
.range(-1, LLUtils.LEXICONOGRAPHIC_ITERATION_SEEKS.length)
|
|
.mapToObj(idx -> Pair.of(idx == -1 ? new byte[0] : LLUtils.LEXICONOGRAPHIC_ITERATION_SEEKS[idx],
|
|
idx + 1 >= LLUtils.LEXICONOGRAPHIC_ITERATION_SEEKS.length ? null
|
|
: LLUtils.LEXICONOGRAPHIC_ITERATION_SEEKS[idx + 1]
|
|
))
|
|
.map(range -> (Callable<Long>) () -> {
|
|
long partialCount = 0;
|
|
try (var rangeReadOpts = new ReadOptions(readOpts)) {
|
|
Slice sliceBegin;
|
|
if (range.getKey() != null) {
|
|
sliceBegin = new Slice(range.getKey());
|
|
} else {
|
|
sliceBegin = null;
|
|
}
|
|
Slice sliceEnd;
|
|
if (range.getValue() != null) {
|
|
sliceEnd = new Slice(range.getValue());
|
|
} else {
|
|
sliceEnd = null;
|
|
}
|
|
try {
|
|
if (sliceBegin != null) {
|
|
rangeReadOpts.setIterateLowerBound(sliceBegin);
|
|
}
|
|
if (sliceBegin != null) {
|
|
rangeReadOpts.setIterateUpperBound(sliceEnd);
|
|
}
|
|
try (RocksIterator rocksIterator = db.newIterator(rangeReadOpts)) {
|
|
rocksIterator.seekToFirst();
|
|
rocksIterator.status();
|
|
while (rocksIterator.isValid()) {
|
|
partialCount++;
|
|
rocksIterator.next();
|
|
rocksIterator.status();
|
|
}
|
|
return partialCount;
|
|
}
|
|
} finally {
|
|
if (sliceBegin != null) {
|
|
sliceBegin.close();
|
|
}
|
|
if (sliceEnd != null) {
|
|
sliceEnd.close();
|
|
}
|
|
}
|
|
}
|
|
})
|
|
.map(commonPool::submit)
|
|
.collect(Collectors.toList());
|
|
long count = 0;
|
|
for (ForkJoinTask<Long> future : futures) {
|
|
count += future.join();
|
|
}
|
|
return count;
|
|
} else {
|
|
long count = 0;
|
|
try (RocksIterator iter = db.newIterator(readOpts)) {
|
|
iter.seekToFirst();
|
|
while (iter.isValid()) {
|
|
count++;
|
|
iter.next();
|
|
}
|
|
return count;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Mono<Send<LLEntry>> removeOne(Mono<Send<LLRange>> rangeMono) {
|
|
return Mono.usingWhen(rangeMono,
|
|
rangeSend -> runOnDb(() -> {
|
|
try (var range = rangeSend.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called removeOne in a nonblocking thread");
|
|
}
|
|
try (var readOpts = new ReadOptions(getReadOptions(null))) {
|
|
ReleasableSlice minBound;
|
|
if (range.hasMin()) {
|
|
minBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
minBound = emptyReleasableSlice();
|
|
}
|
|
try {
|
|
ReleasableSlice maxBound;
|
|
if (range.hasMax()) {
|
|
maxBound = setIterateBound(alloc, databaseOptions.allowNettyDirect(), readOpts,
|
|
IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
maxBound = emptyReleasableSlice();
|
|
}
|
|
try (RocksIterator rocksIterator = db.newIterator(readOpts)) {
|
|
SafeCloseable seekTo;
|
|
if (!LLLocalDictionary.PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = rocksIterSeekTo(alloc, databaseOptions.allowNettyDirect(),
|
|
rocksIterator, range.getMin());
|
|
} else {
|
|
seekTo = null;
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
try {
|
|
rocksIterator.status();
|
|
if (!rocksIterator.isValid()) {
|
|
return null;
|
|
}
|
|
try (Buffer key = LLUtils.readDirectNioBuffer(alloc, rocksIterator::key)) {
|
|
try (Buffer value = LLUtils.readDirectNioBuffer(alloc, rocksIterator::value)) {
|
|
db.delete(EMPTY_WRITE_OPTIONS, key.copy().send());
|
|
return LLEntry.of(key.send(), value.send()).send();
|
|
}
|
|
}
|
|
} finally {
|
|
if (seekTo != null) {
|
|
seekTo.close();
|
|
}
|
|
}
|
|
} finally {
|
|
maxBound.close();
|
|
}
|
|
} finally {
|
|
minBound.close();
|
|
}
|
|
}
|
|
}
|
|
}).onErrorMap(cause -> new IOException("Failed to delete", cause)),
|
|
rangeSend -> Mono.fromRunnable(rangeSend::close)
|
|
);
|
|
}
|
|
|
|
@NotNull
|
|
public static Tuple4<RocksIterator, ReleasableSlice, ReleasableSlice, SafeCloseable> getRocksIterator(BufferAllocator alloc,
|
|
boolean allowNettyDirect,
|
|
ReadOptions readOptions,
|
|
Send<LLRange> rangeToReceive,
|
|
RocksDBColumn db) {
|
|
try (var range = rangeToReceive.receive()) {
|
|
if (Schedulers.isInNonBlockingThread()) {
|
|
throw new UnsupportedOperationException("Called getRocksIterator in a nonblocking thread");
|
|
}
|
|
ReleasableSlice sliceMin;
|
|
ReleasableSlice sliceMax;
|
|
if (range.hasMin()) {
|
|
sliceMin = setIterateBound(alloc, allowNettyDirect, readOptions, IterateBound.LOWER, range.getMin());
|
|
} else {
|
|
sliceMin = emptyReleasableSlice();
|
|
}
|
|
if (range.hasMax()) {
|
|
sliceMax = setIterateBound(alloc, allowNettyDirect, readOptions, IterateBound.UPPER, range.getMax());
|
|
} else {
|
|
sliceMax = emptyReleasableSlice();
|
|
}
|
|
var rocksIterator = db.newIterator(readOptions);
|
|
SafeCloseable seekTo;
|
|
if (!PREFER_SEEK_TO_FIRST && range.hasMin()) {
|
|
seekTo = Objects.requireNonNullElseGet(rocksIterSeekTo(alloc, allowNettyDirect,
|
|
rocksIterator, range.getMin()), () -> ((SafeCloseable) () -> {})
|
|
);
|
|
} else {
|
|
seekTo = () -> {};
|
|
rocksIterator.seekToFirst();
|
|
}
|
|
return Tuples.of(rocksIterator, sliceMin, sliceMax, seekTo);
|
|
}
|
|
}
|
|
}
|