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
|
/**
* Copyright (C) 2012 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/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include "mongo/db/jsobj.h"
#include "mongo/s/chunk_version.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
using mongoutils::str::stream;
/**
* Thrown whenever your config info for a given shard/chunk is out of date.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,
ChunkVersion received,
ChunkVersion wanted,
bool justConnection = false )
: AssertionException(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( stream() << raw << " ( ns : "
<< ( error["ns"].type() == String ?
error["ns"].String() : string("<unknown>") )
<< ", received : "
<< ChunkVersion::fromBSON( error, "vReceived" ).toString()
<< ", wanted : "
<< ChunkVersion::fromBSON( error, "vWanted" ).toString()
<< ", "
<< ( code == SendStaleConfigCode ?
"send" : "recv" ) << " )",
code ),
_justConnection(justConnection) ,
// For legacy reasons, we may not always get a namespace here
_ns( error["ns"].type() == String ? error["ns"].String() : "" ),
_received( ChunkVersion::fromBSON( error, "vReceived" ) ),
_wanted( ChunkVersion::fromBSON( error, "vWanted" ) ) {
}
/**
* Needs message so when we trace all exceptions on construction we get a useful
* message
*/
StaleConfigException() :
AssertionException( "initializing empty stale config exception object", 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; }
/**
* true if this exception would require a full reload of config data to resolve
*/
bool requiresFullReload() const {
return ! _received.hasCompatibleEpoch( _wanted ) ||
_received.isSet() != _wanted.isSet();
}
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;
}
ChunkVersion getVersionReceived() const {
return _received;
}
ChunkVersion 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;
ChunkVersion _received;
ChunkVersion _wanted;
};
class SendStaleConfigException : public StaleConfigException {
public:
SendStaleConfigException( const string& ns,
const string& raw,
ChunkVersion received,
ChunkVersion 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,
ChunkVersion received,
ChunkVersion 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 ) {
}
};
} // namespace mongo
|