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// lasterror.cpp
/* 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.
*/
#include "stdafx.h"
#include "../util/unittest.h"
#include "../util/message.h"
#include "lasterror.h"
#include "jsobj.h"
namespace mongo {
LastError LastError::noError;
LastErrorHolder lastError;
mongo::mutex LastErrorHolder::_idsmutex;
void LastError::appendSelf( BSONObjBuilder &b ) {
if ( !valid ) {
b.appendNull( "err" );
b.append( "n", 0 );
return;
}
if ( msg.empty() )
b.appendNull( "err" );
else
b.append( "err", msg );
if ( code )
b.append( "code" , code );
if ( updatedExisting != NotUpdate )
b.appendBool( "updatedExisting", updatedExisting == True );
b.append( "n", nObjects );
}
void LastErrorHolder::setID( int id ){
_id.set( id );
}
int LastErrorHolder::getID(){
return _id.get();
}
LastError * LastErrorHolder::disableForCommand() {
LastError *le = _get();
assert( le );
le->disabled = true;
le->nPrev--; // caller is a command that shouldn't count as an operation
return le;
}
LastError * LastErrorHolder::get( bool create ) {
LastError *ret = _get( create );
if ( ret && !ret->disabled )
return ret;
return 0;
}
LastError * LastErrorHolder::_get( bool create ){
int id = _id.get();
if ( id == 0 )
return _tl.get();
scoped_lock lock(_idsmutex);
map<int,Status>::iterator i = _ids.find( id );
if ( i == _ids.end() ){
if ( ! create )
return 0;
LastError * le = new LastError();
Status s;
s.time = time(0);
s.lerr = le;
_ids[id] = s;
return le;
}
Status &status = i->second;
status.time = time(0);
return status.lerr;
}
void LastErrorHolder::remove( int id ){
scoped_lock lock(_idsmutex);
map<int,Status>::iterator i = _ids.find( id );
if ( i == _ids.end() )
return;
delete i->second.lerr;
_ids.erase( i );
}
void LastErrorHolder::release(){
int id = _id.get();
if ( id == 0 ){
_tl.release();
return;
}
remove( id );
}
void LastErrorHolder::reset( LastError * le ){
int id = _id.get();
if ( id == 0 ){
_tl.reset( le );
return;
}
scoped_lock lock(_idsmutex);
Status & status = _ids[id];
status.time = time(0);
status.lerr = le;
}
void prepareErrForNewRequest( Message &m, LastError * err ) {
// a killCursors message shouldn't affect last error
if ( m.data->operation() == dbKillCursors ) {
err->disabled = true;
} else {
err->disabled = false;
err->nPrev++;
}
}
void LastErrorHolder::startRequest( Message& m ) {
int id = m.data->id & 0xFFFF0000;
setID( id );
LastError * le = _get( true );
prepareErrForNewRequest( m, le );
}
void LastErrorHolder::startRequest( Message& m , LastError * connectionOwned ) {
if ( !connectionOwned->overridenById ) {
prepareErrForNewRequest( m, connectionOwned );
return;
}
startRequest(m);
}
struct LastErrorHolderTest : public UnitTest {
public:
void test( int i ){
_tl.set( i );
assert( _tl.get() == i );
}
void tlmaptest(){
test( 1 );
test( 12123123 );
test( -123123 );
test( numeric_limits<int>::min() );
test( numeric_limits<int>::max() );
}
void run(){
tlmaptest();
LastError * a = new LastError();
LastError * b = new LastError();
LastErrorHolder holder;
holder.reset( a );
assert( a == holder.get() );
holder.setID( 1 );
assert( 0 == holder.get() );
holder.reset( b );
assert( b == holder.get() );
holder.setID( 0 );
assert( a == holder.get() );
holder.remove( 1 );
}
ThreadLocalValue<int> _tl;
} lastErrorHolderTest;
} // namespace mongo
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