1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// 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).
#ifndef ROCKSDB_LITE
#include "utilities/blob_db/blob_log_writer.h"
#include <cstdint>
#include <string>
#include "file/writable_file_writer.h"
#include "monitoring/statistics.h"
#include "rocksdb/env.h"
#include "util/coding.h"
#include "util/stop_watch.h"
#include "utilities/blob_db/blob_log_format.h"
namespace ROCKSDB_NAMESPACE {
namespace blob_db {
Writer::Writer(std::unique_ptr<WritableFileWriter>&& dest, Env* env,
Statistics* statistics, uint64_t log_number, uint64_t bpsync,
bool use_fs, uint64_t boffset)
: dest_(std::move(dest)),
env_(env),
statistics_(statistics),
log_number_(log_number),
block_offset_(boffset),
bytes_per_sync_(bpsync),
next_sync_offset_(0),
use_fsync_(use_fs),
last_elem_type_(kEtNone) {}
Status Writer::Sync() {
StopWatch sync_sw(env_, statistics_, BLOB_DB_BLOB_FILE_SYNC_MICROS);
Status s = dest_->Sync(use_fsync_);
RecordTick(statistics_, BLOB_DB_BLOB_FILE_SYNCED);
return s;
}
Status Writer::WriteHeader(BlobLogHeader& header) {
assert(block_offset_ == 0);
assert(last_elem_type_ == kEtNone);
std::string str;
header.EncodeTo(&str);
Status s = dest_->Append(Slice(str));
if (s.ok()) {
block_offset_ += str.size();
s = dest_->Flush();
}
last_elem_type_ = kEtFileHdr;
RecordTick(statistics_, BLOB_DB_BLOB_FILE_BYTES_WRITTEN,
BlobLogHeader::kSize);
return s;
}
Status Writer::AppendFooter(BlobLogFooter& footer) {
assert(block_offset_ != 0);
assert(last_elem_type_ == kEtFileHdr || last_elem_type_ == kEtRecord);
std::string str;
footer.EncodeTo(&str);
Status s = dest_->Append(Slice(str));
if (s.ok()) {
block_offset_ += str.size();
s = dest_->Close();
dest_.reset();
}
last_elem_type_ = kEtFileFooter;
RecordTick(statistics_, BLOB_DB_BLOB_FILE_BYTES_WRITTEN,
BlobLogFooter::kSize);
return s;
}
Status Writer::AddRecord(const Slice& key, const Slice& val,
uint64_t expiration, uint64_t* key_offset,
uint64_t* blob_offset) {
assert(block_offset_ != 0);
assert(last_elem_type_ == kEtFileHdr || last_elem_type_ == kEtRecord);
std::string buf;
ConstructBlobHeader(&buf, key, val, expiration);
Status s = EmitPhysicalRecord(buf, key, val, key_offset, blob_offset);
return s;
}
Status Writer::AddRecord(const Slice& key, const Slice& val,
uint64_t* key_offset, uint64_t* blob_offset) {
assert(block_offset_ != 0);
assert(last_elem_type_ == kEtFileHdr || last_elem_type_ == kEtRecord);
std::string buf;
ConstructBlobHeader(&buf, key, val, 0);
Status s = EmitPhysicalRecord(buf, key, val, key_offset, blob_offset);
return s;
}
void Writer::ConstructBlobHeader(std::string* buf, const Slice& key,
const Slice& val, uint64_t expiration) {
BlobLogRecord record;
record.key = key;
record.value = val;
record.expiration = expiration;
record.EncodeHeaderTo(buf);
}
Status Writer::EmitPhysicalRecord(const std::string& headerbuf,
const Slice& key, const Slice& val,
uint64_t* key_offset, uint64_t* blob_offset) {
StopWatch write_sw(env_, statistics_, BLOB_DB_BLOB_FILE_WRITE_MICROS);
Status s = dest_->Append(Slice(headerbuf));
if (s.ok()) {
s = dest_->Append(key);
}
if (s.ok()) {
s = dest_->Append(val);
}
if (s.ok()) {
s = dest_->Flush();
}
*key_offset = block_offset_ + BlobLogRecord::kHeaderSize;
*blob_offset = *key_offset + key.size();
block_offset_ = *blob_offset + val.size();
last_elem_type_ = kEtRecord;
RecordTick(statistics_, BLOB_DB_BLOB_FILE_BYTES_WRITTEN,
BlobLogRecord::kHeaderSize + key.size() + val.size());
return s;
}
} // namespace blob_db
} // namespace ROCKSDB_NAMESPACE
#endif // ROCKSDB_LITE
|
