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
|
// dbgrid/request.cpp
/**
* 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/>.
*/
/* TODO
_ concurrency control.
_ connection pool
_ hostbyname_nonreentrant() problem
_ gridconfig object which gets config from the grid db.
connect to iad-sb-grid
_ limit() works right?
_ KillCursors
later
_ secondary indexes
*/
#include "stdafx.h"
#include "../grid/message.h"
#include "../db/dbmessage.h"
#include "connpool.h"
const char *tempHost = "localhost:27018";
void getMore(Message& m, MessagingPort& p) {
DbMessage d(m);
const char *ns = d.getns();
cout << "TEMP: getmore: " << ns << endl;
ScopedDbConnection dbcon(tempHost);
DBClientConnection &c = dbcon.conn();
Message response;
bool ok = c.port().call(m, response);
uassert("dbgrid: getmore: error calling db", ok);
p.reply(m, response, m.data->id);
dbcon.done();
}
bool runCommandAgainstRegistered(const char *ns, BSONObj& jsobj, BSONObjBuilder& anObjBuilder);
/* got query operation from a client */
void queryOp(Message& m, MessagingPort& p) {
DbMessage d(m);
QueryMessage q(d);
bool lateAssert = false;
try {
if( q.ntoreturn == -1 && strstr(q.ns, ".$cmd") ) {
BSONObjBuilder builder;
cout << q.query.toString() << endl;
bool ok = runCommandAgainstRegistered(q.ns, q.query, builder);
if( ok ) {
BSONObj x = builder.done();
replyToQuery(p, m, x);
return;
}
}
ScopedDbConnection dbcon(tempHost);
DBClientConnection &c = dbcon.conn();
Message response;
bool ok = c.port().call(m, response);
uassert("dbgrid: error calling db", ok);
lateAssert = true;
p.reply(m, response, m.data->id);
dbcon.done();
}
catch( AssertionException& e ) {
assert( !lateAssert );
BSONObjBuilder err;
err.append("$err", e.msg.empty() ? "dbgrid assertion during query" : e.msg);
BSONObj errObj = err.done();
replyToQuery(p, m, errObj);
return;
}
}
void writeOp(int op, Message& m, MessagingPort& p) {
DbMessage d(m);
const char *ns = d.getns();
ScopedDbConnection dbcon(tempHost);
DBClientConnection &c = dbcon.conn();
c.port().say(m);
dbcon.done();
/*
while( d.moreJSObjs() ) {
BSONObj js = d.nextJsObj();
const char *ns = d.getns();
assert(*ns);
}
*/
}
void processRequest(Message& m, MessagingPort& p) {
int op = m.data->operation();
assert( op > dbMsg );
if( op == dbQuery ) {
queryOp(m,p);
}
else if( op == dbGetMore ) {
getMore(m,p);
}
else {
writeOp(op, m, p);
}
}
|
