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Module contains external API of the evitaDB.
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/*
*
* _ _ ____ ____
* _____ _(_) |_ __ _| _ \| __ )
* / _ \ \ / / | __/ _` | | | | _ \
* | __/\ V /| | || (_| | |_| | |_) |
* \___| \_/ |_|\__\__,_|____/|____/
*
* Copyright (c) 2023-2024
*
* Licensed under the Business Source License, Version 1.1 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://github.com/FgForrest/evitaDB/blob/master/LICENSE
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.evitadb.api.configuration;
import lombok.Builder;
import lombok.ToString;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Optional;
/**
* Configuration options related to the key-value storage.
*
* @param storageDirectory Directory on local disk where Evita data files are stored.
* By default, temporary directory is used - but it is highly recommended setting your own
* directory if you don't want to lose the data.
* recommended setting your own directory with dedicated disk space.
* @param exportDirectory Directory on local disk where Evita files are exported - for example, backups,
* JFR recordings, query recordings etc.
* @param lockTimeoutSeconds This timeout represents a time in seconds that is tolerated to wait for lock acquiring.
* Locks are used to get handle to open file. Set of open handles is limited to
* {@link #maxOpenedReadHandles} for read operations and single write handle for write
* operations (only single thread is expected to append to a file).
* @param waitOnCloseSeconds This timeout represents a time that will file offset index wait for processes to release their
* read handles to file. After this timeout files will be closed by force and processes may
* experience an exception.
* @param outputBufferSize The output buffer size determines how large a buffer is kept in memory for output
* purposes. The size of the buffer limits the maximum size of an individual record in the
* key/value data store.
* @param maxOpenedReadHandles Maximum number of simultaneously opened {@link java.io.InputStream} to file offset index file.
* @param computeCRC32C Contains setting that determined whether CRC32C checksums will be computed for written
* records and also whether the CRC32C checksum will be checked on record read.
* @param minimalActiveRecordShare Minimal share of active records in the file. If the share is lower, the file will
* be compacted.
* @param fileSizeCompactionThresholdBytes Minimal file size threshold for compaction. If the file size is lower,
* the file will not be compacted even if the share of active records is lower
* than the minimal share.
* @param timeTravelEnabled When set to true, the data files are not removed immediately after compacting,
* but are kept on disk as long as there is history available in the WAL log.
* This allows a snapshot of the database to be taken at any point in
* the history covered by the WAL log. From the snapshot, the database can be
* restored to the exact point in time with all the data available at that time.
* @param exportDirectorySizeLimitBytes Maximum overall size of the export directory. When this threshold
* is exceeded the oldest files will automatically be removed until the
* size drops below the limit.
* @param exportFileHistoryExpirationSeconds Maximal age of exported file in seconds. When age is exceeded the file
* will be automatically removed.
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2021
*/
@Builder
public record StorageOptions(
@Nullable Path storageDirectory,
@Nullable Path exportDirectory,
long lockTimeoutSeconds,
long waitOnCloseSeconds,
int outputBufferSize,
int maxOpenedReadHandles,
boolean computeCRC32C,
double minimalActiveRecordShare,
long fileSizeCompactionThresholdBytes,
boolean timeTravelEnabled,
long exportDirectorySizeLimitBytes,
long exportFileHistoryExpirationSeconds
) {
public static final int DEFAULT_OUTPUT_BUFFER_SIZE = 2_097_152;
public static final Path DEFAULT_DATA_DIRECTORY = Paths.get("").resolve("data");
public static final Path DEFAULT_EXPORT_DIRECTORY = Paths.get("").resolve("export");
public static final int DEFAULT_LOCK_TIMEOUT_SECONDS = 5;
public static final int DEFAULT_WAIT_ON_CLOSE_SECONDS = 5;
public static final int DEFAULT_MAX_OPENED_READ_HANDLES = Runtime.getRuntime().availableProcessors();
public static final boolean DEFAULT_COMPUTE_CRC = true;
public static final double DEFAULT_MINIMAL_ACTIVE_RECORD_SHARE = 0.5;
public static final long DEFAULT_MINIMAL_FILE_SIZE_COMPACTION_THRESHOLD = 104_857_600L;
public static final boolean DEFAULT_TIME_TRAVEL_ENABLED = true;
public static final long DEFAULT_EXPORT_DIRECTORY_SIZE_LIMIT_BYTES = 1_073_741_824L;
public static final long DEFAULT_EXPORT_FILE_HISTORY_EXPIRATION_SECONDS = 604_800L;
/**
* Builder method is planned to be used only in tests.
*/
public static StorageOptions temporary() {
return new StorageOptions(
Path.of(System.getProperty("java.io.tmpdir"), "evita/data"),
Path.of(System.getProperty("java.io.tmpdir"), "evita/export"),
5, 5, DEFAULT_OUTPUT_BUFFER_SIZE,
Runtime.getRuntime().availableProcessors(),
true,
DEFAULT_MINIMAL_ACTIVE_RECORD_SHARE,
DEFAULT_MINIMAL_FILE_SIZE_COMPACTION_THRESHOLD,
DEFAULT_TIME_TRAVEL_ENABLED,
DEFAULT_EXPORT_DIRECTORY_SIZE_LIMIT_BYTES,
DEFAULT_EXPORT_FILE_HISTORY_EXPIRATION_SECONDS
);
}
/**
* Builder for the storage options. Recommended to use to avoid binary compatibility problems in the future.
*/
public static StorageOptions.Builder builder() {
return new StorageOptions.Builder();
}
/**
* Builder for the storage options. Recommended to use to avoid binary compatibility problems in the future.
*/
public static StorageOptions.Builder builder(@Nonnull StorageOptions storageOptions) {
return new StorageOptions.Builder(storageOptions);
}
public StorageOptions() {
this(
DEFAULT_DATA_DIRECTORY,
DEFAULT_EXPORT_DIRECTORY,
DEFAULT_LOCK_TIMEOUT_SECONDS,
DEFAULT_WAIT_ON_CLOSE_SECONDS,
DEFAULT_OUTPUT_BUFFER_SIZE,
DEFAULT_MAX_OPENED_READ_HANDLES,
DEFAULT_COMPUTE_CRC,
DEFAULT_MINIMAL_ACTIVE_RECORD_SHARE,
DEFAULT_MINIMAL_FILE_SIZE_COMPACTION_THRESHOLD,
DEFAULT_TIME_TRAVEL_ENABLED,
DEFAULT_EXPORT_DIRECTORY_SIZE_LIMIT_BYTES,
DEFAULT_EXPORT_FILE_HISTORY_EXPIRATION_SECONDS
);
}
public StorageOptions(
@Nullable Path storageDirectory,
@Nullable Path exportDirectory,
long lockTimeoutSeconds,
long waitOnCloseSeconds,
int outputBufferSize,
int maxOpenedReadHandles,
boolean computeCRC32C,
double minimalActiveRecordShare,
long fileSizeCompactionThresholdBytes,
boolean timeTravelEnabled,
long exportDirectorySizeLimitBytes,
long exportFileHistoryExpirationSeconds
) {
this.storageDirectory = Optional.ofNullable(storageDirectory).orElse(DEFAULT_DATA_DIRECTORY);
this.exportDirectory = Optional.ofNullable(exportDirectory).orElse(DEFAULT_EXPORT_DIRECTORY);
this.lockTimeoutSeconds = lockTimeoutSeconds;
this.waitOnCloseSeconds = waitOnCloseSeconds;
this.outputBufferSize = outputBufferSize;
this.maxOpenedReadHandles = maxOpenedReadHandles;
this.computeCRC32C = computeCRC32C;
this.minimalActiveRecordShare = minimalActiveRecordShare;
this.fileSizeCompactionThresholdBytes = fileSizeCompactionThresholdBytes;
this.timeTravelEnabled = timeTravelEnabled;
this.exportDirectorySizeLimitBytes = exportDirectorySizeLimitBytes;
this.exportFileHistoryExpirationSeconds = exportFileHistoryExpirationSeconds;
}
/**
* Method returns null safe data directory.
*/
@Nonnull
public Path storageDirectoryOrDefault() {
return storageDirectory == null ?
DEFAULT_DATA_DIRECTORY : storageDirectory;
}
/**
* Method returns null safe export directory.
*/
@Nonnull
public Path exportDirectoryOrDefault() {
return exportDirectory == null ?
DEFAULT_EXPORT_DIRECTORY : exportDirectory;
}
/**
* Standard builder pattern implementation.
*/
@ToString
public static class Builder {
private Path storageDirectory = DEFAULT_DATA_DIRECTORY;
private Path exportDirectory = DEFAULT_EXPORT_DIRECTORY;
private long lockTimeoutSeconds = DEFAULT_LOCK_TIMEOUT_SECONDS;
private long waitOnCloseSeconds = DEFAULT_WAIT_ON_CLOSE_SECONDS;
private int outputBufferSize = DEFAULT_OUTPUT_BUFFER_SIZE;
private int maxOpenedReadHandles = DEFAULT_MAX_OPENED_READ_HANDLES;
private boolean computeCRC32C = DEFAULT_COMPUTE_CRC;
private double minimalActiveRecordShare = DEFAULT_MINIMAL_ACTIVE_RECORD_SHARE;
private long fileSizeCompactionThresholdBytes = DEFAULT_MINIMAL_FILE_SIZE_COMPACTION_THRESHOLD;
private boolean timeTravelEnabled = DEFAULT_TIME_TRAVEL_ENABLED;
private long exportDirectorySizeLimitBytes = DEFAULT_EXPORT_DIRECTORY_SIZE_LIMIT_BYTES;
private long exportFileHistoryExpirationSeconds = DEFAULT_EXPORT_FILE_HISTORY_EXPIRATION_SECONDS;
Builder() {
}
Builder(@Nonnull StorageOptions storageOptions) {
this.storageDirectory = storageOptions.storageDirectory;
this.exportDirectory = storageOptions.exportDirectory;
this.lockTimeoutSeconds = storageOptions.lockTimeoutSeconds;
this.waitOnCloseSeconds = storageOptions.waitOnCloseSeconds;
this.outputBufferSize = storageOptions.outputBufferSize;
this.maxOpenedReadHandles = storageOptions.maxOpenedReadHandles;
this.computeCRC32C = storageOptions.computeCRC32C;
this.minimalActiveRecordShare = storageOptions.minimalActiveRecordShare;
this.fileSizeCompactionThresholdBytes = storageOptions.fileSizeCompactionThresholdBytes;
this.timeTravelEnabled = storageOptions.timeTravelEnabled;
this.exportDirectorySizeLimitBytes = storageOptions.exportDirectorySizeLimitBytes;
this.exportFileHistoryExpirationSeconds = storageOptions.exportFileHistoryExpirationSeconds;
}
@Nonnull
public Builder storageDirectory(@Nonnull Path storageDirectory) {
this.storageDirectory = storageDirectory;
return this;
}
@Nonnull
public Builder exportDirectory(@Nonnull Path exportDirectory) {
this.exportDirectory = exportDirectory;
return this;
}
@Nonnull
public Builder lockTimeoutSeconds(long lockTimeoutSeconds) {
this.lockTimeoutSeconds = lockTimeoutSeconds;
return this;
}
@Nonnull
public Builder waitOnCloseSeconds(long waitOnCloseSeconds) {
this.waitOnCloseSeconds = waitOnCloseSeconds;
return this;
}
@Nonnull
public Builder outputBufferSize(int outputBufferSize) {
this.outputBufferSize = outputBufferSize;
return this;
}
@Nonnull
public Builder maxOpenedReadHandles(int maxOpenedReadHandles) {
this.maxOpenedReadHandles = maxOpenedReadHandles;
return this;
}
@Nonnull
public Builder computeCRC32(boolean computeCRC32) {
this.computeCRC32C = computeCRC32;
return this;
}
@Nonnull
public Builder minimalActiveRecordShare(double minimalActiveRecordShare) {
this.minimalActiveRecordShare = minimalActiveRecordShare;
return this;
}
@Nonnull
public Builder fileSizeCompactionThresholdBytes(long fileSizeCompactionThresholdBytes) {
this.fileSizeCompactionThresholdBytes = fileSizeCompactionThresholdBytes;
return this;
}
@Nonnull
public Builder timeTravelEnabled(boolean timeTravelEnabled) {
this.timeTravelEnabled = timeTravelEnabled;
return this;
}
@Nonnull
public Builder exportDirectorySizeLimitBytes(long exportDirectorySizeLimitBytes) {
this.exportDirectorySizeLimitBytes = exportDirectorySizeLimitBytes;
return this;
}
@Nonnull
public Builder exportFileHistoryExpirationSeconds(long exportFileHistoryExpirationSeconds) {
this.exportFileHistoryExpirationSeconds = exportFileHistoryExpirationSeconds;
return this;
}
@Nonnull
public StorageOptions build() {
return new StorageOptions(
storageDirectory,
exportDirectory,
lockTimeoutSeconds,
waitOnCloseSeconds,
outputBufferSize,
maxOpenedReadHandles,
computeCRC32C,
minimalActiveRecordShare,
fileSizeCompactionThresholdBytes,
timeTravelEnabled,
exportDirectorySizeLimitBytes,
exportFileHistoryExpirationSeconds
);
}
}
}