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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "storage.h"
#include "jsobj.h"
#include "namespace.h"
namespace mongo {
/* For the database/server protocol, these objects and functions encapsulate
the various messages transmitted over the connection.
*/
class DbMessage {
public:
DbMessage(const Message& _m) : m(_m) {
theEnd = _m.data->_data + _m.data->dataLen();
int *r = (int *) _m.data->_data;
reserved = *r;
r++;
data = (const char *) r;
nextjsobj = data;
}
const char * getns() {
return data;
}
void getns(Namespace& ns) {
ns = data;
}
int pullInt() {
if ( nextjsobj == data )
nextjsobj += strlen(data) + 1; // skip namespace
int i = *((int *)nextjsobj);
nextjsobj += 4;
return i;
}
long long pullInt64() {
if ( nextjsobj == data )
nextjsobj += strlen(data) + 1; // skip namespace
long long i = *((long long *)nextjsobj);
nextjsobj += 8;
return i;
}
OID* getOID() {
return (OID *) (data + strlen(data) + 1); // skip namespace
}
void getQueryStuff(const char *&query, int& ntoreturn) {
int *i = (int *) (data + strlen(data) + 1);
ntoreturn = *i;
i++;
query = (const char *) i;
}
/* for insert and update msgs */
bool moreJSObjs() {
return nextjsobj != 0;
}
BSONObj nextJsObj() {
if ( nextjsobj == data )
nextjsobj += strlen(data) + 1; // skip namespace
BSONObj js(nextjsobj);
assert( js.objsize() < ( theEnd - data ) );
if ( js.objsize() <= 0 )
nextjsobj = null;
else {
nextjsobj += js.objsize();
if ( nextjsobj >= theEnd )
nextjsobj = 0;
}
return js;
}
const Message& msg() {
return m;
}
private:
const Message& m;
int reserved;
const char *data;
const char *nextjsobj;
const char *theEnd;
};
/* a request to run a query, received from the database */
class QueryMessage {
public:
const char *ns;
int ntoskip;
int ntoreturn;
int queryOptions;
BSONObj query;
auto_ptr< set<string> > fields;
/* parses the message into the above fields */
QueryMessage(DbMessage& d) {
ns = d.getns();
ntoskip = d.pullInt();
ntoreturn = d.pullInt();
query = d.nextJsObj();
if ( d.moreJSObjs() ) {
fields = auto_ptr< set<string> >(new set<string>());
d.nextJsObj().getFieldNames(*fields);
}
queryOptions = d.msg().data->dataAsInt();
}
};
} // namespace mongo
#include "../client/dbclient.h"
namespace mongo {
inline void replyToQuery(int queryResultFlags,
MessagingPort& p, Message& requestMsg,
void *data, int size,
int nReturned, int startingFrom = 0,
long long cursorId = 0
) {
BufBuilder b(32768);
b.skip(sizeof(QueryResult));
b.append(data, size);
QueryResult *qr = (QueryResult *) b.buf();
qr->resultFlags() = queryResultFlags;
qr->len = b.len();
qr->setOperation(opReply);
qr->cursorId = cursorId;
qr->startingFrom = startingFrom;
qr->nReturned = 1;
b.decouple();
Message *resp = new Message();
resp->setData(qr, true); // transport will free
p.reply(requestMsg, *resp, requestMsg.data->id);
}
} // namespace mongo
//#include "bsonobj.h"
namespace mongo {
inline void replyToQuery(int queryResultFlags,
MessagingPort& p, Message& requestMsg,
BSONObj& responseObj)
{
replyToQuery(queryResultFlags,
p, requestMsg,
(void *) responseObj.objdata(), responseObj.objsize(), 1);
}
} // namespace mongo
|
