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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
// util.h
/**
* 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/>.
*/
#pragma once
#include "../pch.h"
#include "../client/dbclient.h"
#include "../db/jsobj.h"
/**
some generic sharding utils that can be used in mongod or mongos
*/
namespace mongo {
struct ShardChunkVersion {
union {
struct {
int _minor;
int _major;
};
unsigned long long _combined;
};
ShardChunkVersion( int major=0, int minor=0 )
: _minor(minor),_major(major) {
}
ShardChunkVersion( unsigned long long ll )
: _combined( ll ) {
}
ShardChunkVersion( const BSONElement& e ) {
if ( e.type() == Date || e.type() == Timestamp ) {
_combined = e._numberLong();
}
else if ( e.eoo() ) {
_combined = 0;
}
else {
_combined = 0;
log() << "ShardChunkVersion can't handle type (" << (int)(e.type()) << ") " << e << endl;
verify(0);
}
}
void inc( bool major ) {
if ( major )
incMajor();
else
incMinor();
}
void incMajor() {
_major++;
_minor = 0;
}
void incMinor() {
_minor++;
}
unsigned long long toLong() const {
return _combined;
}
bool isSet() const {
return _combined > 0;
}
string toString() const {
stringstream ss;
ss << _major << "|" << _minor;
return ss.str();
}
int majorVersion() const { return _major; }
int minorVersion() const { return _minor; }
operator unsigned long long() const { return _combined; }
ShardChunkVersion& operator=( const BSONElement& elem ) {
switch ( elem.type() ) {
case Timestamp:
case NumberLong:
case Date:
_combined = elem._numberLong();
break;
case EOO:
_combined = 0;
break;
default:
massert( 13657 , str::stream() << "unknown type for ShardChunkVersion: " << elem , 0 );
}
return *this;
}
};
inline ostream& operator<<( ostream &s , const ShardChunkVersion& v) {
s << v._major << "|" << v._minor;
return s;
}
/**
* your config info for a given shard/chunk is out of date
*/
class StaleConfigException : public AssertionException {
public:
StaleConfigException( const string& ns , const string& raw , int code, ShardChunkVersion received, ShardChunkVersion wanted, bool justConnection = false )
: AssertionException(
str::stream() << raw << " ( ns : " << ns <<
", received : " << received.toString() <<
", wanted : " << wanted.toString() <<
", " << ( code == SendStaleConfigCode ? "send" : "recv" ) << " )",
code ),
_justConnection(justConnection) ,
_ns(ns),
_received( received ),
_wanted( wanted )
{}
// Preferred if we're rebuilding this from a thrown exception
StaleConfigException( const string& raw , int code, const BSONObj& error, bool justConnection = false )
: AssertionException(
str::stream() << raw << " ( ns : " << error["ns"].String() << // Note, this will fail if we don't have a ns
", received : " << ShardChunkVersion( error["vReceived"] ).toString() <<
", wanted : " << ShardChunkVersion( error["vWanted"] ).toString() <<
", " << ( code == SendStaleConfigCode ? "send" : "recv" ) << " )",
code ),
_justConnection(justConnection) ,
_ns( error["ns"].String() ),
_received( ShardChunkVersion( error["vReceived"] ) ),
_wanted( ShardChunkVersion( error["vWanted"] ) )
{}
StaleConfigException() : AssertionException( "", 0 ) {}
virtual ~StaleConfigException() throw() {}
virtual void appendPrefix( stringstream& ss ) const { ss << "stale sharding config exception: "; }
bool justConnection() const { return _justConnection; }
string getns() const { return _ns; }
static bool parse( const string& big , string& ns , string& raw ) {
string::size_type start = big.find( '[' );
if ( start == string::npos )
return false;
string::size_type end = big.find( ']' ,start );
if ( end == string::npos )
return false;
ns = big.substr( start + 1 , ( end - start ) - 1 );
raw = big.substr( end + 1 );
return true;
}
ShardChunkVersion getVersionReceived() const { return _received; }
ShardChunkVersion getVersionWanted() const { return _wanted; }
StaleConfigException& operator=( const StaleConfigException& elem ) {
this->_ei.msg = elem._ei.msg;
this->_ei.code = elem._ei.code;
this->_justConnection = elem._justConnection;
this->_ns = elem._ns;
this->_received = elem._received;
this->_wanted = elem._wanted;
return *this;
}
private:
bool _justConnection;
string _ns;
ShardChunkVersion _received;
ShardChunkVersion _wanted;
};
class SendStaleConfigException : public StaleConfigException {
public:
SendStaleConfigException( const string& ns , const string& raw , ShardChunkVersion received, ShardChunkVersion wanted, bool justConnection = false )
: StaleConfigException( ns, raw, SendStaleConfigCode, received, wanted, justConnection ) {}
SendStaleConfigException( const string& raw , const BSONObj& error, bool justConnection = false )
: StaleConfigException( raw, SendStaleConfigCode, error, justConnection ) {}
};
class RecvStaleConfigException : public StaleConfigException {
public:
RecvStaleConfigException( const string& ns , const string& raw , ShardChunkVersion received, ShardChunkVersion wanted, bool justConnection = false )
: StaleConfigException( ns, raw, RecvStaleConfigCode, received, wanted, justConnection ) {}
RecvStaleConfigException( const string& raw , const BSONObj& error, bool justConnection = false )
: StaleConfigException( raw, RecvStaleConfigCode, error, justConnection ) {}
};
class ShardConnection;
class VersionManager {
public:
VersionManager(){};
bool isVersionableCB( DBClientBase* );
bool initShardVersionCB( DBClientBase*, BSONObj& );
bool forceRemoteCheckShardVersionCB( const string& );
bool checkShardVersionCB( DBClientBase*, const string&, bool, int );
bool checkShardVersionCB( ShardConnection*, bool, int );
void resetShardVersionCB( DBClientBase* );
};
extern VersionManager versionManager;
}
|
