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/**
* 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* Thrown whenever your config info for a given shard/chunk is out of date.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 std::string& ns,
const std::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 std::string& raw,
int code,
const BSONObj& error,
bool justConnection = false )
: AssertionException( stream() << raw << " ( ns : "
<< ( error["ns"].type() == String ?
error["ns"].String() : std::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( std::stringstream& ss ) const {
ss << "stale sharding config exception: ";
}
bool justConnection() const { return _justConnection; }
std::string getns() const { return _ns; }
/**
* true if this exception would require a full reload of config data to resolve
*/
bool requiresFullReload() const {
return ! _received.hasEqualEpoch( _wanted ) ||
_received.isSet() != _wanted.isSet();
}
static bool parse( const std::string& big , std::string& ns , std::string& raw ) {
std::string::size_type start = big.find( '[' );
if ( start == std::string::npos )
return false;
std::string::size_type end = big.find( ']' ,start );
if ( end == std::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;
std::string _ns;
ChunkVersion _received;
ChunkVersion _wanted;
};
class SendStaleConfigException : public StaleConfigException {
public:
SendStaleConfigException( const std::string& ns,
const std::string& raw,
ChunkVersion received,
ChunkVersion wanted,
bool justConnection = false )
: StaleConfigException( ns, raw, SendStaleConfigCode, received, wanted, justConnection ){
}
SendStaleConfigException( const std::string& raw,
const BSONObj& error,
bool justConnection = false )
: StaleConfigException( raw, SendStaleConfigCode, error, justConnection ) {
}
};
class RecvStaleConfigException : public StaleConfigException {
public:
RecvStaleConfigException( const std::string& ns,
const std::string& raw,
ChunkVersion received,
ChunkVersion wanted,
bool justConnection = false )
: StaleConfigException( ns, raw, RecvStaleConfigCode, received, wanted, justConnection ){
}
RecvStaleConfigException( const std::string& raw,
const BSONObj& error,
bool justConnection = false )
: StaleConfigException( raw, RecvStaleConfigCode, error, justConnection ) {
}
};
} // namespace mongo
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