mirror of https://github.com/facebook/rocksdb.git
109 lines
4.2 KiB
C++
109 lines
4.2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "utilities/transactions/write_prepared_txn_db.h"
|
|
#include "utilities/transactions/write_unprepared_txn.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
class WriteUnpreparedTxn;
|
|
|
|
class WriteUnpreparedTxnDB : public WritePreparedTxnDB {
|
|
public:
|
|
using WritePreparedTxnDB::WritePreparedTxnDB;
|
|
|
|
Status Initialize(const std::vector<size_t>& compaction_enabled_cf_indices,
|
|
const std::vector<ColumnFamilyHandle*>& handles) override;
|
|
|
|
Transaction* BeginTransaction(const WriteOptions& write_options,
|
|
const TransactionOptions& txn_options,
|
|
Transaction* old_txn) override;
|
|
|
|
// Struct to hold ownership of snapshot and read callback for cleanup.
|
|
struct IteratorState;
|
|
|
|
using WritePreparedTxnDB::NewIterator;
|
|
Iterator* NewIterator(const ReadOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
WriteUnpreparedTxn* txn);
|
|
|
|
private:
|
|
Status RollbackRecoveredTransaction(const DBImpl::RecoveredTransaction* rtxn);
|
|
};
|
|
|
|
class WriteUnpreparedCommitEntryPreReleaseCallback : public PreReleaseCallback {
|
|
// TODO(lth): Reduce code duplication with
|
|
// WritePreparedCommitEntryPreReleaseCallback
|
|
public:
|
|
// includes_data indicates that the commit also writes non-empty
|
|
// CommitTimeWriteBatch to memtable, which needs to be committed separately.
|
|
WriteUnpreparedCommitEntryPreReleaseCallback(
|
|
WritePreparedTxnDB* db, DBImpl* db_impl,
|
|
const std::map<SequenceNumber, size_t>& unprep_seqs,
|
|
size_t data_batch_cnt = 0, bool publish_seq = true)
|
|
: db_(db),
|
|
db_impl_(db_impl),
|
|
unprep_seqs_(unprep_seqs),
|
|
data_batch_cnt_(data_batch_cnt),
|
|
includes_data_(data_batch_cnt_ > 0),
|
|
publish_seq_(publish_seq) {
|
|
assert(unprep_seqs.size() > 0);
|
|
}
|
|
|
|
virtual Status Callback(SequenceNumber commit_seq,
|
|
bool is_mem_disabled __attribute__((__unused__)),
|
|
uint64_t, size_t /*index*/,
|
|
size_t /*total*/) override {
|
|
const uint64_t last_commit_seq = LIKELY(data_batch_cnt_ <= 1)
|
|
? commit_seq
|
|
: commit_seq + data_batch_cnt_ - 1;
|
|
// Recall that unprep_seqs maps (un)prepared_seq => prepare_batch_cnt.
|
|
for (const auto& s : unprep_seqs_) {
|
|
for (size_t i = 0; i < s.second; i++) {
|
|
db_->AddCommitted(s.first + i, last_commit_seq);
|
|
}
|
|
}
|
|
|
|
if (includes_data_) {
|
|
assert(data_batch_cnt_);
|
|
// Commit the data that is accompanied with the commit request
|
|
for (size_t i = 0; i < data_batch_cnt_; i++) {
|
|
// For commit seq of each batch use the commit seq of the last batch.
|
|
// This would make debugging easier by having all the batches having
|
|
// the same sequence number.
|
|
db_->AddCommitted(commit_seq + i, last_commit_seq);
|
|
}
|
|
}
|
|
if (db_impl_->immutable_db_options().two_write_queues && publish_seq_) {
|
|
assert(is_mem_disabled); // implies the 2nd queue
|
|
// Publish the sequence number. We can do that here assuming the callback
|
|
// is invoked only from one write queue, which would guarantee that the
|
|
// publish sequence numbers will be in order, i.e., once a seq is
|
|
// published all the seq prior to that are also publishable.
|
|
db_impl_->SetLastPublishedSequence(last_commit_seq);
|
|
}
|
|
// else SequenceNumber that is updated as part of the write already does the
|
|
// publishing
|
|
return Status::OK();
|
|
}
|
|
|
|
private:
|
|
WritePreparedTxnDB* db_;
|
|
DBImpl* db_impl_;
|
|
const std::map<SequenceNumber, size_t>& unprep_seqs_;
|
|
size_t data_batch_cnt_;
|
|
// Either because it is commit without prepare or it has a
|
|
// CommitTimeWriteBatch
|
|
bool includes_data_;
|
|
// Should the callback also publishes the commit seq number
|
|
bool publish_seq_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
#endif // ROCKSDB_LITE
|