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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 {
/**
* Thrown whenever the config info for a given shard/chunk is out of date.
*/
class StaleConfigException final : public AssertionException {
public:
StaleConfigException(const std::string& ns,
const std::string& raw,
ChunkVersion received,
ChunkVersion wanted)
: AssertionException(ErrorCodes::StaleConfig,
str::stream() << raw << " ( ns : " << ns << ", received : "
<< received.toString()
<< ", wanted : "
<< wanted.toString()
<< " )"),
_ns(ns),
_received(received),
_wanted(wanted) {}
/** Preferred if we're rebuilding this from a thrown exception */
StaleConfigException(const std::string& raw, const BSONObj& error)
: AssertionException(ErrorCodes::StaleConfig,
str::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()
<< " )"),
// 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")) {}
/**
* TODO: This constructor is only necessary, because ParallelSortClusteredCursor puts per-host
* stale config exceptions in a map and this requires a default constructor.
*/
StaleConfigException()
: AssertionException(ErrorCodes::InternalError,
"initializing empty stale config exception object") {}
virtual ~StaleConfigException() throw() {}
std::string getns() const {
return _ns;
}
ChunkVersion getVersionReceived() const {
return _received;
}
ChunkVersion getVersionWanted() const {
return _wanted;
}
/**
* Returns 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();
}
private:
void defineOnlyInFinalSubclassToPreventSlicing() final {}
std::string _ns;
ChunkVersion _received;
ChunkVersion _wanted;
};
} // namespace mongo
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