C++ BSONObjBuilder类代码示例

    string OpDebug::report(const CurOp& curop, const SingleThreadedLockStats& lockStats) const {
        StringBuilder s;
        if ( iscommand )
            s << "command ";
        else
            s << opToString( op ) << ' ';
        s << ns;

        if ( ! query.isEmpty() ) {
            if ( iscommand ) {
                s << " command: ";

                Command* curCommand = curop.getCommand();
                if (curCommand) {
                    mutablebson::Document cmdToLog(query, mutablebson::Document::kInPlaceDisabled);
                    curCommand->redactForLogging(&cmdToLog);
                    s << curCommand->name << " ";
                    s << cmdToLog.toString();
                }
                else { // Should not happen but we need to handle curCommand == NULL gracefully
                    s << query.toString();
                }
            }
            else {
                s << " query: ";
                s << query.toString();
            }
        }

        if (!planSummary.empty()) {
            s << " planSummary: " << planSummary.toString();
        }

        if ( ! updateobj.isEmpty() ) {
            s << " update: ";
            updateobj.toString( s );
        }

        OPDEBUG_TOSTRING_HELP( cursorid );
        OPDEBUG_TOSTRING_HELP( ntoreturn );
        OPDEBUG_TOSTRING_HELP( ntoskip );
        OPDEBUG_TOSTRING_HELP_BOOL( exhaust );

        OPDEBUG_TOSTRING_HELP( nscanned );
        OPDEBUG_TOSTRING_HELP( nscannedObjects );
        OPDEBUG_TOSTRING_HELP_BOOL( idhack );
        OPDEBUG_TOSTRING_HELP_BOOL( scanAndOrder );
        OPDEBUG_TOSTRING_HELP( nmoved );
        OPDEBUG_TOSTRING_HELP( nMatched );
        OPDEBUG_TOSTRING_HELP( nModified );
        OPDEBUG_TOSTRING_HELP( ninserted );
        OPDEBUG_TOSTRING_HELP( ndeleted );
        OPDEBUG_TOSTRING_HELP_BOOL( fastmod );
        OPDEBUG_TOSTRING_HELP_BOOL( fastmodinsert );
        OPDEBUG_TOSTRING_HELP_BOOL( upsert );
        OPDEBUG_TOSTRING_HELP_BOOL( cursorExhausted );
        OPDEBUG_TOSTRING_HELP( keyUpdates );
        OPDEBUG_TOSTRING_HELP( writeConflicts );

        if ( extra.len() )
            s << " " << extra.str();

        if ( ! exceptionInfo.empty() ) {
            s << " exception: " << exceptionInfo.msg;
            if ( exceptionInfo.code )
                s << " code:" << exceptionInfo.code;
        }

        s << " numYields:" << curop.numYields();

        OPDEBUG_TOSTRING_HELP( nreturned );
        if (responseLength > 0) {
            s << " reslen:" << responseLength;
        }

        {
            BSONObjBuilder locks;
            lockStats.report(&locks);
            s << " locks:" << locks.obj().toString();
        }

        s << " " << executionTime << "ms";

        return s.str();
    }

    // static
    void IndexBoundsBuilder::translate(const MatchExpression* expr, int direction,
                                       OrderedIntervalList* oilOut, bool* exactOut) {
        Interval interval;
        bool exact = false;

        if (expr->isLeaf()) {
            if (MatchExpression::EQ == expr->matchType()) {
                const EqualityMatchExpression* node = static_cast<const EqualityMatchExpression*>(expr);
                // We have to copy the data out of the parse tree and stuff it into the index bounds.
                // BSONValue will be useful here.
                BSONObj dataObj = objFromElement(node->getData());

                if (dataObj.couldBeArray()) {
                    // XXX: build better bounds
                    warning() << "building lazy bounds for " << expr->toString() << endl;
                    interval = allValues();
                    exact = false;
                }
                else {
                    verify(dataObj.isOwned());
                    interval = makePointInterval(dataObj);
                    exact = true;
                }
            }
            else if (MatchExpression::LTE == expr->matchType()) {
                const LTEMatchExpression* node = static_cast<const LTEMatchExpression*>(expr);
                BSONObjBuilder bob;
                bob.appendMinKey("");
                bob.append(node->getData());
                BSONObj dataObj = bob.obj();
                verify(dataObj.isOwned());
                interval = makeRangeInterval(dataObj, true, true);
                exact = true;
            }
            else if (MatchExpression::LT == expr->matchType()) {
                const LTMatchExpression* node = static_cast<const LTMatchExpression*>(expr);
                BSONObjBuilder bob;
                bob.appendMinKey("");
                bob.append(node->getData());
                BSONObj dataObj = bob.obj();
                verify(dataObj.isOwned());
                interval = makeRangeInterval(dataObj, true, false);
                exact = true;
            }
            else if (MatchExpression::GT == expr->matchType()) {
                const GTMatchExpression* node = static_cast<const GTMatchExpression*>(expr);
                BSONObjBuilder bob;
                bob.append(node->getData());
                bob.appendMaxKey("");
                BSONObj dataObj = bob.obj();
                verify(dataObj.isOwned());
                interval = makeRangeInterval(dataObj, false, true);
                exact = true;
            }
            else if (MatchExpression::GTE == expr->matchType()) {
                const GTEMatchExpression* node = static_cast<const GTEMatchExpression*>(expr);
                BSONObjBuilder bob;
                bob.append(node->getData());
                bob.appendMaxKey("");
                BSONObj dataObj = bob.obj();
                verify(dataObj.isOwned());
                interval = makeRangeInterval(dataObj, true, true);
                exact = true;
            }
            else {
                // XXX: build better bounds
                warning() << "building lazy bounds for " << expr->toString() << endl;
                interval = allValues();
                exact = false;
            }
        }
        else {
            // XXX: build better bounds
            verify(expr->isArray());
            warning() << "building lazy bounds for " << expr->toString() << endl;
            interval = allValues();
            exact = false;
        }

        if (-1 == direction) {
            reverseInterval(&interval);
        }

        oilOut->intervals.push_back(interval);
        *exactOut = exact;
    }

// liberally cribbed from user_prio.cpp
void 
plumage::stats::processAccountantStats(ClassAd* ad, ODSMongodbOps* ops, Date_t& ts)
{
    // attr%d holders...sadly reverting back to MyString for convenience of formatstr
    MyString  attrName, attrPrio, attrResUsed, attrWtResUsed, attrFactor, attrBeginUsage, attrAccUsage;
    MyString  attrLastUsage, attrAcctGroup, attrIsAcctGroup;
    MyString  attrConfigQuota, attrEffectiveQuota, attrSubtreeQuota, attrSurplusPolicy;
    
    // values
    string  name, acctGroup, surplusPolicy;
    float priority, factor, wtResUsed, configQuota, effectiveQuota, subtreeQuota, accUsage = -1;
    int   resUsed, beginUsage, lastUsage;
    resUsed = beginUsage = lastUsage = 0;
    bool isAcctGroup;

    DBClientConnection* conn = ops->m_db_conn;
    conn->ensureIndex(DB_STATS_SAMPLES_ACCOUNTANT, BSON( "ts" << -1 ));
    conn->ensureIndex(DB_STATS_SAMPLES_ACCOUNTANT, BSON( "lu" << -1 ));
    conn->ensureIndex(DB_STATS_SAMPLES_ACCOUNTANT, BSON( "n" << 1 ));
    unsigned long long acct_count = conn->count(DB_STATS_SAMPLES_ACCOUNTANT);

    // eventhough the Accountant doesn't forget
    // we don't care about stale submitters (default: last 24 hours)
    int cfg_last_usage = param_integer("ODS_ACCOUNTANT_LAST_USAGE", 60*60*24);
    int minLastUsageTime = time(0)-cfg_last_usage;
    int numElem = -1;
    ad->LookupInteger( "NumSubmittors", numElem );

    for( int i=1; i<=numElem; i++) {
        priority=0;
        isAcctGroup = false;

        // skip stale records unless we have none
        attrLastUsage.formatstr("LastUsageTime%d", i );
        ad->LookupInteger  ( attrLastUsage.Value(), lastUsage );
        if (lastUsage < minLastUsageTime && acct_count > 0)
            continue;

        // parse the horrid classad
        attrName.formatstr("Name%d", i );
        attrPrio.formatstr("Priority%d", i );
        attrResUsed.formatstr("ResourcesUsed%d", i );
        attrWtResUsed.formatstr("WeightedResourcesUsed%d", i );
        attrFactor.formatstr("PriorityFactor%d", i );
        attrBeginUsage.formatstr("BeginUsageTime%d", i );
        attrAccUsage.formatstr("WeightedAccumulatedUsage%d", i );
        attrAcctGroup.formatstr("AccountingGroup%d", i);
        attrIsAcctGroup.formatstr("IsAccountingGroup%d", i);
        attrConfigQuota.formatstr("ConfigQuota%d", i);
        attrEffectiveQuota.formatstr("EffectiveQuota%d", i);
        attrSubtreeQuota.formatstr("SubtreeQuota%d", i);
        attrSurplusPolicy.formatstr("SurplusPolicy%d", i);

        ad->LookupString   ( attrName.Value(), name );
        ad->LookupFloat    ( attrPrio.Value(), priority );
        ad->LookupFloat    ( attrFactor.Value(), factor );
        ad->LookupFloat    ( attrAccUsage.Value(), accUsage );
        ad->LookupInteger  ( attrBeginUsage.Value(), beginUsage );
        ad->LookupInteger  ( attrResUsed.Value(), resUsed );
        ad->LookupBool     ( attrIsAcctGroup.Value(), isAcctGroup);
        ad->LookupFloat    ( attrConfigQuota.Value(), configQuota );
        ad->LookupFloat    ( attrEffectiveQuota.Value(), effectiveQuota );
        ad->LookupFloat    ( attrSubtreeQuota.Value(), subtreeQuota );
        ad->LookupString   ( attrSurplusPolicy.Value(), surplusPolicy );
        
        if( !ad->LookupFloat( attrWtResUsed.Value(), wtResUsed ) ) {
            wtResUsed = resUsed;
        }
        if (!ad->LookupString(attrAcctGroup.Value(), acctGroup)) {
            acctGroup = "<none>";
        }

        BSONObjBuilder bob;
        bob.appendDate("ts",ts);
        bob.append("n",name);
        bob.append("ag",acctGroup);
        bob.appendAsNumber("prio",formatReal(priority));
        bob.appendAsNumber("fac",formatReal(factor));
        bob.append("ru",resUsed);
        bob.append("wru",wtResUsed);
        // condor timestamps need massaging when going in the db
        bob.appendDate("bu",static_cast<unsigned long long>(beginUsage)*1000);
        bob.appendDate("lu",static_cast<unsigned long long>(lastUsage)*1000);
        bob.appendAsNumber("au",formatReal(accUsage));
        bob.appendAsNumber("cq",formatReal(configQuota));
        bob.appendAsNumber("eq",formatReal(effectiveQuota));
        bob.appendAsNumber("sq",formatReal(subtreeQuota));
        if (!surplusPolicy.empty()) bob.append("sp",surplusPolicy);
        
        conn->insert(DB_STATS_SAMPLES_ACCOUNTANT,bob.obj());
    }
    
}

    bool OpDebug::append(const CurOp& curop, BSONObjBuilder& b, size_t maxSize) const {
        b.append( "op" , iscommand ? "command" : opToString( op ) );
        b.append( "ns" , ns.toString() );
        
        int queryUpdateObjSize = 0;
        if (!query.isEmpty()) {
            queryUpdateObjSize += query.objsize();
        }
        else if (!iscommand && curop.haveQuery()) {
            queryUpdateObjSize += curop.query()["query"].size();
        }

        if (!updateobj.isEmpty()) {
            queryUpdateObjSize += updateobj.objsize();
        }

        if (static_cast<size_t>(queryUpdateObjSize) > maxSize) {
            if (!query.isEmpty()) {
                // Use 60 since BSONObj::toString can truncate strings into 150 chars
                // and we want to have enough room for both query and updateobj when
                // the entire document is going to be serialized into a string
                const string abbreviated(query.toString(false, false), 0, 60);
                b.append(iscommand ? "command" : "query", abbreviated + "...");
            }
            else if (!iscommand && curop.haveQuery()) {
                const string abbreviated(curop.query()["query"].toString(false, false), 0, 60);
                b.append("query", abbreviated + "...");
            }

            if (!updateobj.isEmpty()) {
                const string abbreviated(updateobj.toString(false, false), 0, 60);
                b.append("updateobj", abbreviated + "...");
            }

            return false;
        }

        if (!query.isEmpty()) {
            b.append(iscommand ? "command" : "query", query);
        }
        else if (!iscommand && curop.haveQuery()) {
            curop.appendQuery(b, "query");
        }

        if (!updateobj.isEmpty()) {
            b.append("updateobj", updateobj);
        }

        const bool moved = (nmoved >= 1);

        OPDEBUG_APPEND_NUMBER( cursorid );
        OPDEBUG_APPEND_NUMBER( ntoreturn );
        OPDEBUG_APPEND_NUMBER( ntoskip );
        OPDEBUG_APPEND_BOOL( exhaust );

        OPDEBUG_APPEND_NUMBER( nscanned );
        OPDEBUG_APPEND_BOOL( idhack );
        OPDEBUG_APPEND_BOOL( scanAndOrder );
        OPDEBUG_APPEND_BOOL( moved );
        OPDEBUG_APPEND_NUMBER( nmoved );
        OPDEBUG_APPEND_NUMBER( nupdated );
        OPDEBUG_APPEND_BOOL( fastmod );
        OPDEBUG_APPEND_BOOL( fastmodinsert );
        OPDEBUG_APPEND_BOOL( upsert );
        OPDEBUG_APPEND_NUMBER( keyUpdates );

        b.appendNumber( "numYield" , curop.numYields() );
        b.append( "lockStats" , curop.lockStat().report() );

        if ( ! exceptionInfo.empty() )
            exceptionInfo.append( b , "exception" , "exceptionCode" );

        OPDEBUG_APPEND_NUMBER( nreturned );
        OPDEBUG_APPEND_NUMBER( responseLength );
        b.append( "millis" , executionTime );

        return true;
    }

    Status MMAPV1DatabaseCatalogEntry::_renameSingleNamespace( OperationContext* txn,
                                                              const StringData& fromNS,
                                                              const StringData& toNS,
                                                              bool stayTemp ) {
        // some sanity checking
        NamespaceDetails* fromDetails = _namespaceIndex.details( fromNS );
        if ( !fromDetails )
            return Status( ErrorCodes::BadValue, "from namespace doesn't exist" );

        if ( _namespaceIndex.details( toNS ) )
            return Status( ErrorCodes::BadValue, "to namespace already exists" );

        // at this point, we haven't done anything destructive yet

        // ----
        // actually start moving
        // ----

        // this could throw, but if it does we're ok
        _namespaceIndex.add_ns( txn, toNS, fromDetails );
        NamespaceDetails* toDetails = _namespaceIndex.details( toNS );

        try {
            toDetails->copyingFrom(txn,
                                   toNS,
                                   _namespaceIndex,
                                   fromDetails); // fixes extraOffset
        }
        catch( DBException& ) {
            // could end up here if .ns is full - if so try to clean up / roll back a little
            _namespaceIndex.kill_ns( txn, toNS );
            throw;
        }

        // at this point, code .ns stuff moved

        _namespaceIndex.kill_ns( txn, fromNS );
        fromDetails = NULL;

        // fix system.namespaces
        BSONObj newSpec;
        DiskLoc oldSpecLocation;
        {

            BSONObj oldSpec;
            {
                RecordStoreV1Base* rs = _getNamespaceRecordStore( txn, fromNS );
                scoped_ptr<RecordIterator> it( rs->getIterator() );
                while ( !it->isEOF() ) {
                    DiskLoc loc = it->getNext();
                    const Record* rec = it->recordFor( loc );
                    BSONObj entry( rec->data() );
                    if ( fromNS == entry["name"].String() ) {
                        oldSpecLocation = loc;
                        oldSpec = entry.getOwned();
                        break;
                    }
                }
            }
            invariant( !oldSpec.isEmpty() );
            invariant( !oldSpecLocation.isNull() );

            BSONObjBuilder b;
            BSONObjIterator i( oldSpec.getObjectField( "options" ) );
            while( i.more() ) {
                BSONElement e = i.next();
                if ( strcmp( e.fieldName(), "create" ) != 0 ) {
                    if (stayTemp || (strcmp(e.fieldName(), "temp") != 0))
                        b.append( e );
                }
                else {
                    b << "create" << toNS;
                }
            }
            newSpec = b.obj();
        }

        _addNamespaceToNamespaceCollection( txn, toNS, newSpec.isEmpty() ? 0 : &newSpec );

        _getNamespaceRecordStore( txn, fromNS )->deleteRecord( txn, oldSpecLocation );

        return Status::OK();
    }

Status ChunkMoveOperationState::commitMigration(const MigrationSessionId& sessionId) {
    invariant(_distLockStatus.is_initialized());
    invariant(_distLockStatus->isOK());

    log() << "About to enter migrate critical section";

    // We're under the collection distributed lock here, so no other migrate can change maxVersion
    // or CollectionMetadata state.
    ShardingState* const shardingState = ShardingState::get(_txn);

    Status startStatus = ShardingStateRecovery::startMetadataOp(_txn);
    if (!startStatus.isOK()) {
        warning() << "Failed to write sharding state recovery document" << causedBy(startStatus);
        return startStatus;
    }

    shardingState->migrationSourceManager()->setInCriticalSection(true);

    const ChunkVersion originalCollVersion = getCollMetadata()->getCollVersion();

    ChunkVersion myVersion = originalCollVersion;
    myVersion.incMajor();

    {
        ScopedTransaction transaction(_txn, MODE_IX);
        Lock::DBLock lk(_txn->lockState(), _nss.db(), MODE_IX);
        Lock::CollectionLock collLock(_txn->lockState(), _nss.ns(), MODE_X);

        invariant(myVersion > shardingState->getVersion(_nss.ns()));

        // Bump the metadata's version up and "forget" about the chunk being moved. This is
        // not the commit point, but in practice the state in this shard won't change until
        // the commit it done.
        shardingState->donateChunk(_txn, _nss.ns(), _minKey, _maxKey, myVersion);
    }

    log() << "moveChunk setting version to: " << myVersion << migrateLog;

    // We're under the collection lock here, too, so we can undo the chunk donation because
    // no other state change could be ongoing
    BSONObj res;
    Status recvChunkCommitStatus{ErrorCodes::InternalError, "status not set"};

    try {
        ScopedDbConnection connTo(_toShardCS, 35.0);
        connTo->runCommand("admin", createRecvChunkCommitRequest(sessionId), res);
        connTo.done();
        recvChunkCommitStatus = getStatusFromCommandResult(res);
    } catch (const DBException& e) {
        const string msg = stream() << "moveChunk could not contact to shard " << _toShard
                                    << " to commit transfer" << causedBy(e);
        warning() << msg;
        recvChunkCommitStatus = Status(e.toStatus().code(), msg);
    }

    if (MONGO_FAIL_POINT(failMigrationCommit) && recvChunkCommitStatus.isOK()) {
        recvChunkCommitStatus =
            Status(ErrorCodes::InternalError, "Failing _recvChunkCommit due to failpoint.");
    }

    if (!recvChunkCommitStatus.isOK()) {
        log() << "moveChunk migrate commit not accepted by TO-shard: " << res
              << " resetting shard version to: " << getShardVersion() << migrateLog;

        {
            ScopedTransaction transaction(_txn, MODE_IX);
            Lock::DBLock dbLock(_txn->lockState(), _nss.db(), MODE_IX);
            Lock::CollectionLock collLock(_txn->lockState(), _nss.ns(), MODE_X);

            log() << "moveChunk collection lock acquired to reset shard version from "
                     "failed migration";

            // Revert the chunk manager back to the state before "forgetting" about the chunk
            shardingState->undoDonateChunk(_txn, _nss.ns(), getCollMetadata());
        }

        log() << "Shard version successfully reset to clean up failed migration";

        return Status(recvChunkCommitStatus.code(),
                      stream() << "_recvChunkCommit failed: " << causedBy(recvChunkCommitStatus));
    }

    log() << "moveChunk migrate commit accepted by TO-shard: " << res << migrateLog;

    BSONArrayBuilder updates;

    {
        // Update for the chunk being moved
        BSONObjBuilder op;
        op.append("op", "u");
        op.appendBool("b", false);  // No upserting
        op.append("ns", ChunkType::ConfigNS);

        BSONObjBuilder n(op.subobjStart("o"));
        n.append(ChunkType::name(), Chunk::genID(_nss.ns(), _minKey));
        myVersion.addToBSON(n, ChunkType::DEPRECATED_lastmod());
        n.append(ChunkType::ns(), _nss.ns());
        n.append(ChunkType::min(), _minKey);
        n.append(ChunkType::max(), _maxKey);
        n.append(ChunkType::shard(), _toShard);
//.........这里部分代码省略.........

        void run(){
            Scope * s = globalScriptEngine->newScope();
            
            //  --  A  --
            
            BSONObj o;
            {
                BSONObjBuilder b ;
                b.append( "a" , (int)5 );
                b.append( "b" , 5.6 );
                o = b.obj();
            }
            ASSERT_EQUALS( NumberInt , o["a"].type() );
            ASSERT_EQUALS( NumberDouble , o["b"].type() );
            
            s->setObject( "z" , o );
            s->invoke( "return z" , BSONObj() );
            BSONObj out = s->getObject( "return" );
            ASSERT_EQUALS( 5 , out["a"].number() );
            ASSERT_EQUALS( 5.6 , out["b"].number() );

            ASSERT_EQUALS( NumberDouble , out["b"].type() );
            ASSERT_EQUALS( NumberInt , out["a"].type() );

            //  --  B  --
            
            {
                BSONObjBuilder b ;
                b.append( "a" , (int)5 );
                b.append( "b" , 5.6 );
                o = b.obj();
            }

            s->setObject( "z" , o , false );
            s->invoke( "return z" , BSONObj() );
            out = s->getObject( "return" );
            ASSERT_EQUALS( 5 , out["a"].number() );
            ASSERT_EQUALS( 5.6 , out["b"].number() );

            ASSERT_EQUALS( NumberDouble , out["b"].type() );
            ASSERT_EQUALS( NumberInt , out["a"].type() );

            
            //  -- C --
            
            {
                BSONObjBuilder b ;
                
                {
                    BSONObjBuilder c;
                    c.append( "0" , 5.5 );
                    c.append( "1" , 6 );
                    b.appendArray( "a" , c.obj() );
                }
                
                o = b.obj();
            }
            
            ASSERT_EQUALS( NumberDouble , o["a"].embeddedObjectUserCheck()["0"].type() );
            ASSERT_EQUALS( NumberInt , o["a"].embeddedObjectUserCheck()["1"].type() );
            
            s->setObject( "z" , o , false );
            out = s->getObject( "z" );

            ASSERT_EQUALS( NumberDouble , out["a"].embeddedObjectUserCheck()["0"].type() );
            ASSERT_EQUALS( NumberInt , out["a"].embeddedObjectUserCheck()["1"].type() );
            
            s->invokeSafe( "z.z = 5;" , BSONObj() );
            out = s->getObject( "z" );
            ASSERT_EQUALS( 5 , out["z"].number() );
            ASSERT_EQUALS( NumberDouble , out["a"].embeddedObjectUserCheck()["0"].type() );
            // Commenting so that v8 tests will work
//            ASSERT_EQUALS( NumberDouble , out["a"].embeddedObjectUserCheck()["1"].type() ); // TODO: this is technically bad, but here to make sure that i understand the behavior


            // Eliot says I don't have to worry about this case
            
//            // -- D --
//            
//            o = fromjson( "{a:3.0,b:4.5}" );
//            ASSERT_EQUALS( NumberDouble , o["a"].type() );
//            ASSERT_EQUALS( NumberDouble , o["b"].type() );
//
//            s->setObject( "z" , o , false );
//            s->invoke( "return z" , BSONObj() );
//            out = s->getObject( "return" );
//            ASSERT_EQUALS( 3 , out["a"].number() );
//            ASSERT_EQUALS( 4.5 , out["b"].number() );
//            
//            ASSERT_EQUALS( NumberDouble , out["b"].type() );
//            ASSERT_EQUALS( NumberDouble , out["a"].type() );
//            
            
            delete s;
        }

 virtual bool run(const string& , BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
     if( !check(errmsg, result) )
         return false;
     result.append("rbid",rbid);
     return true;
 }

    bool run(OperationContext* txn,
             const string& dbname,
             BSONObj& cmdObj,
             int,
             string& errmsg,
             BSONObjBuilder& result) {
        _runCalled = true;

        const auto service = txn->getServiceContext();
        const auto clock = service->getFastClockSource();
        const auto runStart = clock->now();
        BSONObjBuilder timeBuilder(256);

        const auto authSession = AuthorizationSession::get(Client::getCurrent());

        // --- basic fields that are global

        result.append("host", prettyHostName());
        result.append("version", VersionInfoInterface::instance().version());
        result.append("process", serverGlobalParams.binaryName);
        result.append("pid", ProcessId::getCurrent().asLongLong());
        result.append("uptime", (double)(time(0) - serverGlobalParams.started));
        auto uptime = clock->now() - _started;
        result.append("uptimeMillis", durationCount<Milliseconds>(uptime));
        result.append("uptimeEstimate", durationCount<Seconds>(uptime));
        result.appendDate("localTime", jsTime());

        timeBuilder.appendNumber("after basic",
                                 durationCount<Milliseconds>(clock->now() - runStart));

        // --- all sections

        for (SectionMap::const_iterator i = _sections->begin(); i != _sections->end(); ++i) {
            ServerStatusSection* section = i->second;

            std::vector<Privilege> requiredPrivileges;
            section->addRequiredPrivileges(&requiredPrivileges);
            if (!authSession->isAuthorizedForPrivileges(requiredPrivileges))
                continue;

            bool include = section->includeByDefault();
            const auto& elem = cmdObj[section->getSectionName()];
            if (elem.type()) {
                include = elem.trueValue();
            }

            if (!include) {
                continue;
            }

            section->appendSection(txn, elem, &result);
            timeBuilder.appendNumber(
                static_cast<string>(str::stream() << "after " << section->getSectionName()),
                durationCount<Milliseconds>(clock->now() - runStart));
        }

        // --- counters
        bool includeMetricTree = MetricTree::theMetricTree != NULL;
        if (cmdObj["metrics"].type() && !cmdObj["metrics"].trueValue())
            includeMetricTree = false;

        if (includeMetricTree) {
            MetricTree::theMetricTree->appendTo(result);
        }

        // --- some hard coded global things hard to pull out

        {
            RamLog::LineIterator rl(RamLog::get("warnings"));
            if (rl.lastWrite() >= time(0) - (10 * 60)) {  // only show warnings from last 10 minutes
                BSONArrayBuilder arr(result.subarrayStart("warnings"));
                while (rl.more()) {
                    arr.append(rl.next());
                }
                arr.done();
            }
        }

        auto runElapsed = clock->now() - runStart;
        timeBuilder.appendNumber("at end", durationCount<Milliseconds>(runElapsed));
        if (runElapsed > Milliseconds(1000)) {
            BSONObj t = timeBuilder.obj();
            log() << "serverStatus was very slow: " << t;
            result.append("timing", t);
        }

        return true;
    }

    /** @param fromRepl false if from ApplyOpsCmd
        @return true if was and update should have happened and the document DNE.  see replset initial sync code.
     */
    bool applyOperation_inlock(const BSONObj& op, bool fromRepl, bool convertUpdateToUpsert) {
        LOG(3) << "applying op: " << op << endl;
        bool failedUpdate = false;

        OpCounters * opCounters = fromRepl ? &replOpCounters : &globalOpCounters;

        const char *names[] = { "o", "ns", "op", "b" };
        BSONElement fields[4];
        op.getFields(4, names, fields);

        BSONObj o;
        if( fields[0].isABSONObj() )
            o = fields[0].embeddedObject();
            
        const char *ns = fields[1].valuestrsafe();

        Lock::assertWriteLocked(ns);

        NamespaceDetails *nsd = nsdetails(ns);

        // operation type -- see logOp() comments for types
        const char *opType = fields[2].valuestrsafe();

        if ( *opType == 'i' ) {
            opCounters->gotInsert();

            const char *p = strchr(ns, '.');
            if ( p && strcmp(p, ".system.indexes") == 0 ) {
                if (o["background"].trueValue()) {
                    IndexBuilder* builder = new IndexBuilder(ns, o);
                    // This spawns a new thread and returns immediately.
                    builder->go();
                }
                else {
                    IndexBuilder builder(ns, o);
                    // Finish the foreground build before returning
                    builder.build();
                }
            }
            else {
                // do upserts for inserts as we might get replayed more than once
                OpDebug debug;
                BSONElement _id;
                if( !o.getObjectID(_id) ) {
                    /* No _id.  This will be very slow. */
                    Timer t;
                    updateObjectsForReplication(ns, o, o, true, false, false, debug, false,
                                                QueryPlanSelectionPolicy::idElseNatural() );
                    if( t.millis() >= 2 ) {
                        RARELY OCCASIONALLY log() << "warning, repl doing slow updates (no _id field) for " << ns << endl;
                    }
                }
                else {
                    // probably don't need this since all replicated colls have _id indexes now
                    // but keep it just in case
                    RARELY if ( nsd && !nsd->isCapped() ) { ensureHaveIdIndex(ns, false); }

                    /* todo : it may be better to do an insert here, and then catch the dup key exception and do update
                              then.  very few upserts will not be inserts...
                              */
                    BSONObjBuilder b;
                    b.append(_id);
                    updateObjectsForReplication(ns, o, b.done(), true, false, false , debug, false,
                                                QueryPlanSelectionPolicy::idElseNatural() );
                }
            }
        }

    void createOplog() {
        Lock::GlobalWrite lk;

        const char * ns = "local.oplog.$main";

        bool rs = !cmdLine._replSet.empty();
        if( rs )
            ns = rsoplog;

        Client::Context ctx(ns);

        NamespaceDetails * nsd = nsdetails( ns );

        if ( nsd ) {

            if ( cmdLine.oplogSize != 0 ) {
                int o = (int)(nsd->storageSize() / ( 1024 * 1024 ) );
                int n = (int)(cmdLine.oplogSize / ( 1024 * 1024 ) );
                if ( n != o ) {
                    stringstream ss;
                    ss << "cmdline oplogsize (" << n << ") different than existing (" << o << ") see: http://dochub.mongodb.org/core/increase-oplog";
                    log() << ss.str() << endl;
                    throw UserException( 13257 , ss.str() );
                }
            }

            if( rs ) return;

            DBDirectClient c;
            BSONObj lastOp = c.findOne( ns, Query().sort(reverseNaturalObj) );
            if ( !lastOp.isEmpty() ) {
                OpTime::setLast( lastOp[ "ts" ].date() );
            }
            return;
        }

        /* create an oplog collection, if it doesn't yet exist. */
        BSONObjBuilder b;
        double sz;
        if ( cmdLine.oplogSize != 0 )
            sz = (double)cmdLine.oplogSize;
        else {
            /* not specified. pick a default size */
            sz = 50.0 * 1024 * 1024;
            if ( sizeof(int *) >= 8 ) {
#if defined(__APPLE__)
                // typically these are desktops (dev machines), so keep it smallish
                sz = (256-64) * 1024 * 1024;
#else
                sz = 990.0 * 1024 * 1024;
                boost::intmax_t free = File::freeSpace(dbpath); //-1 if call not supported.
                double fivePct = free * 0.05;
                if ( fivePct > sz )
                    sz = fivePct;
#endif
            }
        }

        log() << "******" << endl;
        log() << "creating replication oplog of size: " << (int)( sz / ( 1024 * 1024 ) ) << "MB..." << endl;

        b.append("size", sz);
        b.appendBool("capped", 1);
        b.appendBool("autoIndexId", false);

        string err;
        BSONObj o = b.done();
        userCreateNS(ns, o, err, false);
        if( !rs )
            logOp( "n", "", BSONObj() );

        /* sync here so we don't get any surprising lag later when we try to sync */
        MemoryMappedFile::flushAll(true);
        log() << "******" << endl;
    }

        void handleRESTQuery( string ns , string action , BSONObj & params , int & responseCode , stringstream & out ) {
            Timer t;

            int skip = _getOption( params["skip"] , 0 );
            int num = _getOption( params["limit"] , _getOption( params["count" ] , 1000 ) ); // count is old, limit is new

            int one = 0;
            if ( params["one"].type() == String && tolower( params["one"].valuestr()[0] ) == 't' ) {
                num = 1;
                one = 1;
            }

            BSONObjBuilder queryBuilder;

            BSONObjIterator i(params);
            while ( i.more() ){
                BSONElement e = i.next();
                string name = e.fieldName();
                if ( ! name.find( "filter_" ) == 0 )
                    continue;

                const char * field = name.substr( 7 ).c_str();
                const char * val = e.valuestr();

                char * temp;

                // TODO: this is how i guess if something is a number.  pretty lame right now
                double number = strtod( val , &temp );
                if ( temp != val )
                    queryBuilder.append( field , number );
                else
                    queryBuilder.append( field , val );
            }

            BSONObj query = queryBuilder.obj();

            auto_ptr<DBClientCursor> cursor = db.query( ns.c_str() , query, num , skip );

            if ( one ) {
                if ( cursor->more() ) {
                    BSONObj obj = cursor->next();
                    out << obj.jsonString() << "\n";
                }
                else {
                    responseCode = 404;
                }
                return;
            }

            out << "{\n";
            out << "  \"offset\" : " << skip << ",\n";
            out << "  \"rows\": [\n";

            int howMany = 0;
            while ( cursor->more() ) {
                if ( howMany++ )
                    out << " ,\n";
                BSONObj obj = cursor->next();
                out << "    " << obj.jsonString();

            }
            out << "\n  ],\n\n";

            out << "  \"total_rows\" : " << howMany << " ,\n";
            out << "  \"query\" : " << query.jsonString() << " ,\n";
            out << "  \"millis\" : " << t.millis() << "\n";
            out << "}\n";
        }

/* ****************************************************************************
*
* mongoSubscribeContext - 
*/
HttpStatusCode mongoSubscribeContext(SubscribeContextRequest* requestP, SubscribeContextResponse* responseP, Format inFormat)
{

    /* Take semaphore. The LM_S* family of macros combines semaphore release with return */
    semTake();

    LM_T(LmtMongo, ("Subscribe Context Request"));

    DBClientConnection* connection = getMongoConnection();

    /* If expiration is not present, then use a default one */
    if (requestP->duration.isEmpty()) {
        requestP->duration.set(DEFAULT_DURATION);
    }

    /* Calculate expiration (using the current time and the duration field in the request) */
    long long expiration = getCurrentTime() + requestP->duration.parse();
    LM_T(LmtMongo, ("Subscription expiration: %lu", expiration));

    /* Create the mongoDB subscription document */
    BSONObjBuilder sub;
    OID oid;
    oid.init();
    sub.append("_id", oid);
    sub.append(CSUB_EXPIRATION, expiration);
    sub.append(CSUB_REFERENCE, requestP->reference.get());

    /* Throttling */
    if (!requestP->throttling.isEmpty()) {
        sub.append(CSUB_THROTTLING, requestP->throttling.parse());
    }

    /* Build entities array */
    BSONArrayBuilder entities;
    for (unsigned int ix = 0; ix < requestP->entityIdVector.size(); ++ix) {
        EntityId* en = requestP->entityIdVector.get(ix);
        entities.append(BSON(CSUB_ENTITY_ID << en->id <<
                             CSUB_ENTITY_TYPE << en->type <<
                             CSUB_ENTITY_ISPATTERN << en->isPattern));
    }
    sub.append(CSUB_ENTITIES, entities.arr());

    /* Build attributes array */
    BSONArrayBuilder attrs;
    for (unsigned int ix = 0; ix < requestP->attributeList.size(); ++ix) {
        attrs.append(requestP->attributeList.get(ix));
    }
    sub.append(CSUB_ATTRS, attrs.arr());

    /* Build conditions array (including side-effect notifications and threads creation) */
    bool notificationDone = false;
    BSONArray conds = processConditionVector(&requestP->notifyConditionVector,
                                             requestP->entityIdVector,
                                             requestP->attributeList, oid.str(),
                                             requestP->reference.get(),
                                             &notificationDone,
                                             inFormat);
    sub.append(CSUB_CONDITIONS, conds);
    if (notificationDone) {
        sub.append(CSUB_LASTNOTIFICATION, getCurrentTime());
        sub.append(CSUB_COUNT, 1);
    }

    /* Adding format to use in notifications */
    sub.append(CSUB_FORMAT, std::string(formatToString(inFormat)));

    /* Insert document in database */
    BSONObj subDoc = sub.obj();
    try {
        LM_T(LmtMongo, ("insert() in '%s' collection: '%s'", getSubscribeContextCollectionName(), subDoc.toString().c_str()));
        connection->insert(getSubscribeContextCollectionName(), subDoc);
    }
    catch( const DBException &e ) {
        responseP->subscribeError.errorCode.fill(SccReceiverInternalError,
                                                 std::string("collection: ") + getSubscribeContextCollectionName() +
                                                 " - insert(): " + subDoc.toString() +
                                                 " - exception: " + e.what());

        LM_SRE(SccOk,("Database error '%s'", responseP->subscribeError.errorCode.reasonPhrase.c_str()));
    }    

    /* Fill the response element */
    responseP->subscribeResponse.duration = requestP->duration;
    responseP->subscribeResponse.subscriptionId.set(oid.str());
    responseP->subscribeResponse.throttling = requestP->throttling;

    LM_SR(SccOk);

}

        bool _run(const string& , BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
            if( cmdObj["replSetReconfig"].type() != Object ) {
                errmsg = "no configuration specified";
                return false;
            }

            bool force = cmdObj.hasField("force") && cmdObj["force"].trueValue();
            if( force && !theReplSet ) {
                replSettings.reconfig = cmdObj["replSetReconfig"].Obj().getOwned();
                result.append("msg", "will try this config momentarily, try running rs.conf() again in a few seconds");
                return true;
            }

            if ( !check(errmsg, result) ) {
                return false;
            }

            if( !force && !theReplSet->box.getState().primary() ) {
                errmsg = "replSetReconfig command must be sent to the current replica set primary.";
                return false;
            }

            {
                // just make sure we can get a write lock before doing anything else.  we'll reacquire one
                // later.  of course it could be stuck then, but this check lowers the risk if weird things
                // are up - we probably don't want a change to apply 30 minutes after the initial attempt.
                time_t t = time(0);
                Lock::GlobalWrite lk;
                if( time(0)-t > 20 ) {
                    errmsg = "took a long time to get write lock, so not initiating.  Initiate when server less busy?";
                    return false;
                }
            }

            try {
                scoped_ptr<ReplSetConfig> newConfig
                        (ReplSetConfig::make(cmdObj["replSetReconfig"].Obj(), force));

                log() << "replSet replSetReconfig config object parses ok, " <<
                        newConfig->members.size() << " members specified" << rsLog;

                if( !ReplSetConfig::legalChange(theReplSet->getConfig(), *newConfig, errmsg) ) {
                    return false;
                }

                checkMembersUpForConfigChange(*newConfig, result, false);

                log() << "replSet replSetReconfig [2]" << rsLog;

                theReplSet->haveNewConfig(*newConfig, true);
                ReplSet::startupStatusMsg.set("replSetReconfig'd");
            }
            catch( DBException& e ) {
                log() << "replSet replSetReconfig exception: " << e.what() << rsLog;
                throw;
            }
            catch( string& se ) {
                log() << "replSet reconfig exception: " << se << rsLog;
                errmsg = se;
                return false;
            }

            resetSlaveCache();
            return true;
        }

    Status MMAPV1DatabaseCatalogEntry::renameCollection( OperationContext* txn,
                                                        const StringData& fromNS,
                                                        const StringData& toNS,
                                                        bool stayTemp ) {
        Status s = _renameSingleNamespace( txn, fromNS, toNS, stayTemp );
        if ( !s.isOK() )
            return s;

        NamespaceDetails* details = _namespaceIndex.details( toNS );
        invariant( details );

        RecordStoreV1Base* systemIndexRecordStore = _getIndexRecordStore( txn );
        scoped_ptr<RecordIterator> it( systemIndexRecordStore->getIterator() );

        while ( !it->isEOF() ) {
            DiskLoc loc = it->getNext();
            const Record* rec = it->recordFor( loc );
            BSONObj oldIndexSpec( rec->data() );
            if ( fromNS != oldIndexSpec["ns"].valuestrsafe() )
                continue;

            BSONObj newIndexSpec;
            {
                BSONObjBuilder b;
                BSONObjIterator i( oldIndexSpec );
                while( i.more() ) {
                    BSONElement e = i.next();
                    if ( strcmp( e.fieldName(), "ns" ) != 0 )
                        b.append( e );
                    else
                        b << "ns" << toNS;
                }
                newIndexSpec = b.obj();
            }

            StatusWith<DiskLoc> newIndexSpecLoc =
                systemIndexRecordStore->insertRecord( txn,
                                                      newIndexSpec.objdata(),
                                                      newIndexSpec.objsize(),
                                                      -1 );
            if ( !newIndexSpecLoc.isOK() )
                return newIndexSpecLoc.getStatus();

            const string& indexName = oldIndexSpec.getStringField( "name" );

            {
                // fix IndexDetails pointer
                NamespaceDetailsCollectionCatalogEntry ce( toNS, details,
                                                           _getIndexRecordStore( txn ), this );
                int indexI = ce._findIndexNumber( indexName );

                IndexDetails& indexDetails = details->idx(indexI);
                *txn->recoveryUnit()->writing(&indexDetails.info) = newIndexSpecLoc.getValue(); // XXX: dur
            }

            {
                // move underlying namespac
                string oldIndexNs = IndexDescriptor::makeIndexNamespace( fromNS, indexName );
                string newIndexNs = IndexDescriptor::makeIndexNamespace( toNS, indexName );

                Status s = _renameSingleNamespace( txn, oldIndexNs, newIndexNs, false );
                if ( !s.isOK() )
                    return s;
            }

            systemIndexRecordStore->deleteRecord( txn, loc );
        }

        return Status::OK();
    }