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Move blob_db/ttl_extractor.h into blob_db/blob_db.h
Summary: Move blob_db/ttl_extractor.h into blob_db/blob_db.h Also exclude TTLExtractor from LITE build. Closes https://github.com/facebook/rocksdb/pull/2665 Differential Revision: D5520009 Pulled By: yiwu-arbug fbshipit-source-id: 4813dcc272c7cc4bf2cdac285256d9a17d78c7b7
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@ -13,12 +13,13 @@
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#include "rocksdb/db.h"
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#include "rocksdb/status.h"
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#include "rocksdb/utilities/stackable_db.h"
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#include "utilities/blob_db/ttl_extractor.h"
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namespace rocksdb {
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namespace blob_db {
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class TTLExtractor;
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// A wrapped database which puts values of KV pairs in a separate log
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// and store location to the log in the underlying DB.
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// It lacks lots of importatant functionalities, e.g. DB restarts,
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@ -188,6 +189,33 @@ class BlobDB : public StackableDB {
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Status DestroyBlobDB(const std::string& dbname, const Options& options,
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const BlobDBOptions& bdb_options);
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// TTLExtractor allow applications to extract TTL from key-value pairs.
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// This useful for applications using Put or WriteBatch to write keys and
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// don't intend to migrate to PutWithTTL or PutUntil.
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//
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// Applications can implement either ExtractTTL or ExtractExpiration. If both
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// are implemented, ExtractExpiration will take precedence.
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class TTLExtractor {
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public:
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// Extract TTL from key-value pair.
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// Return true if the key has TTL, false otherwise. If key has TTL,
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// TTL is pass back through ttl. The method can optionally modify the value,
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// pass the result back through new_value, and also set value_changed to true.
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virtual bool ExtractTTL(const Slice& key, const Slice& value, uint64_t* ttl,
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std::string* new_value, bool* value_changed);
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// Extract expiration time from key-value pair.
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// Return true if the key has expiration time, false otherwise. If key has
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// expiration time, it is pass back through expiration. The method can
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// optionally modify the value, pass the result back through new_value,
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// and also set value_changed to true.
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virtual bool ExtractExpiration(const Slice& key, const Slice& value,
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uint64_t now, uint64_t* expiration,
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std::string* new_value, bool* value_changed);
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virtual ~TTLExtractor() = default;
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};
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} // namespace blob_db
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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@ -2,8 +2,9 @@
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "ttl_extractor.h"
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#ifndef ROCKSDB_LITE
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#include "utilities/blob_db/blob_db.h"
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#include "util/coding.h"
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namespace rocksdb {
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@ -29,3 +30,5 @@ bool TTLExtractor::ExtractExpiration(const Slice& key, const Slice& value,
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} // namespace blob_db
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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@ -1,43 +0,0 @@
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#include <memory>
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#include <string>
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#include "rocksdb/slice.h"
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namespace rocksdb {
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namespace blob_db {
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// TTLExtractor allow applications to extract TTL from key-value pairs.
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// This useful for applications using Put or WriteBatch to write keys and
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// don't intend to migrate to PutWithTTL or PutUntil.
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//
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// Applications can implement either ExtractTTL or ExtractExpiration. If both
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// are implemented, ExtractExpiration will take precedence.
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class TTLExtractor {
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public:
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// Extract TTL from key-value pair.
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// Return true if the key has TTL, false otherwise. If key has TTL,
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// TTL is pass back through ttl. The method can optionally modify the value,
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// pass the result back through new_value, and also set value_changed to true.
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virtual bool ExtractTTL(const Slice& key, const Slice& value, uint64_t* ttl,
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std::string* new_value, bool* value_changed);
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// Extract expiration time from key-value pair.
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// Return true if the key has expiration time, false otherwise. If key has
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// expiration time, it is pass back through expiration. The method can
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// optionally modify the value, pass the result back through new_value,
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// and also set value_changed to true.
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virtual bool ExtractExpiration(const Slice& key, const Slice& value,
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uint64_t now, uint64_t* expiration,
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std::string* new_value, bool* value_changed);
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virtual ~TTLExtractor() = default;
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};
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} // namespace blob_db
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} // namespace rocksdb
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