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// lasterror.h
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "mongo/bson/oid.h"
namespace mongo {
class BSONObjBuilder;
class Message;
struct LastError {
int code;
string msg;
enum UpdatedExistingType { NotUpdate, True, False } updatedExisting;
OID upsertedId;
OID writebackId; // this shouldn't get reset so that old GLE are handled
int writebackSince;
long long nObjects;
int nPrev;
bool valid;
bool disabled;
void writeback( OID& oid ) {
reset( true );
writebackId = oid;
writebackSince = 0;
}
void raiseError(int _code , const char *_msg) {
reset( true );
code = _code;
msg = _msg;
}
void recordUpdate( bool _updateObjects , long long _nObjects , OID _upsertedId ) {
reset( true );
nObjects = _nObjects;
updatedExisting = _updateObjects ? True : False;
if ( _upsertedId.isSet() )
upsertedId = _upsertedId;
}
void recordDelete( long long nDeleted ) {
reset( true );
nObjects = nDeleted;
}
LastError() {
reset();
writebackSince = 0;
}
void reset( bool _valid = false ) {
code = 0;
msg.clear();
updatedExisting = NotUpdate;
nObjects = 0;
nPrev = 1;
writebackSince++;
valid = _valid;
disabled = false;
upsertedId.clear();
}
/**
* @return if there is an err
*/
bool appendSelf( BSONObjBuilder &b , bool blankErr = true );
/**
* appends fields which are not "error" related
* this whole mechanism needs to be re-written
* but needs a lot of real thought
*/
void appendSelfStatus( BSONObjBuilder &b );
struct Disabled : boost::noncopyable {
Disabled( LastError * le ) {
_le = le;
if ( _le ) {
_prev = _le->disabled;
_le->disabled = true;
}
else {
_prev = false;
}
}
~Disabled() {
if ( _le )
_le->disabled = _prev;
}
LastError * _le;
bool _prev;
};
static LastError noError;
};
extern class LastErrorHolder {
public:
LastErrorHolder(){}
~LastErrorHolder();
LastError * get( bool create = false );
LastError * getSafe() {
LastError * le = get(false);
if ( ! le ) {
error() << " no LastError!" << endl;
verify( le );
}
return le;
}
LastError * _get( bool create = false ); // may return a disabled LastError
void reset( LastError * le );
/** ok to call more than once. */
void initThread();
int getID();
void release();
/** when db receives a message/request, call this */
LastError * startRequest( Message& m , LastError * connectionOwned );
void disconnect( int clientId );
// used to disable lastError reporting while processing a killCursors message
// disable causes get() to return 0.
LastError *disableForCommand(); // only call once per command invocation!
private:
boost::thread_specific_ptr<LastError> _tl;
struct Status {
time_t time;
LastError *lerr;
};
} lastError;
void setLastError(int code , const char *msg);
} // namespace mongo
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