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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 <boost/thread/tss.hpp>
#undef assert
#define assert MONGO_assert
namespace mongo {
class BSONObjBuilder;
class Message;
struct LastError {
int code;
string msg;
enum UpdatedExistingType { NotUpdate, True, False } updatedExisting;
/* todo: nObjects should be 64 bit */
long long nObjects;
int nPrev;
bool valid;
bool overridenById;
bool disabled;
void raiseError(int _code , const char *_msg) {
reset( true );
code = _code;
msg = _msg;
}
void recordUpdate( bool _updatedExisting, long long nChanged ) {
reset( true );
nObjects = nChanged;
updatedExisting = _updatedExisting ? True : False;
}
void recordDelete( long long nDeleted ) {
reset( true );
nObjects = nDeleted;
}
LastError() {
overridenById = false;
reset();
}
void reset( bool _valid = false ) {
code = 0;
msg.clear();
updatedExisting = NotUpdate;
nObjects = 0;
nPrev = 1;
valid = _valid;
disabled = false;
}
void appendSelf( BSONObjBuilder &b );
static LastError noError;
};
extern class LastErrorHolder {
public:
LastErrorHolder() : _id( 0 ) {}
LastError * get( bool create = false );
LastError * _get( bool create = false ); // may return a disabled LastError
void reset( LastError * le );
/** ok to call more than once. */
void initThread();
/**
* id of 0 means should use thread local management
*/
void setID( int id );
int getID();
void remove( int id );
void release();
/** when db receives a message/request, call this */
void startRequest( Message& m , LastError * connectionOwned );
LastError * startRequest( Message& m , int clientId = 0 );
// 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:
ThreadLocalValue<int> _id;
boost::thread_specific_ptr<LastError> _tl;
struct Status {
time_t time;
LastError *lerr;
};
static mongo::mutex _idsmutex;
map<int,Status> _ids;
} lastError;
inline void raiseError(int code , const char *msg) {
LastError *le = lastError.get();
if ( le == 0 ) {
/* might be intentional (non-user thread) */
DEV log() << "warning dev: lastError==0 won't report:" << msg << endl;
} else if ( le->disabled ) {
log() << "lastError disabled, can't report: " << msg << endl;
} else {
le->raiseError(code, msg);
}
}
inline void recordUpdate( bool updatedExisting, int nChanged ) {
LastError *le = lastError.get();
if ( le )
le->recordUpdate( updatedExisting, nChanged );
}
inline void recordDelete( int nDeleted ) {
LastError *le = lastError.get();
if ( le )
le->recordDelete( nDeleted );
}
} // namespace mongo
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