forked from pytorch/pytorch
-
Notifications
You must be signed in to change notification settings - Fork 0
/
blobs_queue_db.h
145 lines (124 loc) · 3.21 KB
/
blobs_queue_db.h
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
140
141
142
143
144
145
#pragma once
#include <chrono>
#include <string>
#include "caffe2/core/db.h"
#include "caffe2/core/logging.h"
#include "caffe2/core/stats.h"
#include "caffe2/queue/blobs_queue.h"
namespace caffe2 {
namespace db {
namespace {
const std::string& GetStringFromBlob(Blob* blob) {
if (blob->template IsType<string>()) {
return blob->template Get<string>();
} else if (blob->template IsType<Tensor>()) {
return *blob->template Get<Tensor>().template data<string>();
} else {
CAFFE_THROW("Unsupported Blob type");
}
}
}
class BlobsQueueDBCursor : public Cursor {
public:
explicit BlobsQueueDBCursor(
std::shared_ptr<BlobsQueue> queue,
int key_blob_index,
int value_blob_index,
float timeout_secs)
: queue_(queue),
key_blob_index_(key_blob_index),
value_blob_index_(value_blob_index),
timeout_secs_(timeout_secs),
inited_(false),
valid_(false) {
LOG(INFO) << "BlobsQueueDBCursor constructed";
CAFFE_ENFORCE(queue_ != nullptr, "queue is null");
CAFFE_ENFORCE(value_blob_index_ >= 0, "value_blob_index < 0");
}
virtual ~BlobsQueueDBCursor() {}
void Seek(const string& /* unused */) override {
CAFFE_THROW("Seek is not supported.");
}
bool SupportsSeek() override {
return false;
}
void SeekToFirst() override {
// not applicable
}
void Next() override {
unique_ptr<Blob> blob = make_unique<Blob>();
vector<Blob*> blob_vector{blob.get()};
auto success = queue_->blockingRead(blob_vector, timeout_secs_);
if (!success) {
LOG(ERROR) << "Timed out reading from BlobsQueue or it is closed";
valid_ = false;
return;
}
if (key_blob_index_ >= 0) {
key_ = GetStringFromBlob(blob_vector[key_blob_index_]);
}
value_ = GetStringFromBlob(blob_vector[value_blob_index_]);
valid_ = true;
}
string key() override {
if (!inited_) {
Next();
inited_ = true;
}
return key_;
}
string value() override {
if (!inited_) {
Next();
inited_ = true;
}
return value_;
}
bool Valid() override {
return valid_;
}
private:
std::shared_ptr<BlobsQueue> queue_;
int key_blob_index_;
int value_blob_index_;
float timeout_secs_;
bool inited_;
string key_;
string value_;
bool valid_;
};
class BlobsQueueDB : public DB {
public:
BlobsQueueDB(
const string& source,
Mode mode,
std::shared_ptr<BlobsQueue> queue,
int key_blob_index = -1,
int value_blob_index = 0,
float timeout_secs = 0.0)
: DB(source, mode),
queue_(queue),
key_blob_index_(key_blob_index),
value_blob_index_(value_blob_index),
timeout_secs_(timeout_secs) {
LOG(INFO) << "BlobsQueueDB constructed";
}
virtual ~BlobsQueueDB() {
Close();
}
void Close() override {}
unique_ptr<Cursor> NewCursor() override {
return make_unique<BlobsQueueDBCursor>(
queue_, key_blob_index_, value_blob_index_, timeout_secs_);
}
unique_ptr<Transaction> NewTransaction() override {
CAFFE_THROW("Not implemented.");
}
private:
std::shared_ptr<BlobsQueue> queue_;
int key_blob_index_;
int value_blob_index_;
float timeout_secs_;
};
} // namespace db
} // namespace caffe2