本文整理汇总了C++中BSONList::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ BSONList::clear方法的具体用法？C++ BSONList::clear怎么用？C++ BSONList::clear使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BSONList的用法示例。
在下文中一共展示了BSONList::clear方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: run
bool run(const char *ns, BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool){
string dbname = cc().database()->name; // this has to come before dbtemprelease
dbtemprelease temprelease; // we don't touch the db directly
string shardedOutputCollection = cmdObj["shardedOutputCollection"].valuestrsafe();
MRSetup mr( dbname , cmdObj.firstElement().embeddedObjectUserCheck() , false );
set<ServerAndQuery> servers;
BSONObjBuilder shardCounts;
map<string,long long> counts;
BSONObj shards = cmdObj["shards"].embeddedObjectUserCheck();
vector< auto_ptr<DBClientCursor> > shardCursors;
BSONObjIterator i( shards );
while ( i.more() ){
BSONElement e = i.next();
string shard = e.fieldName();
BSONObj res = e.embeddedObjectUserCheck();
uassert( 10078 , "something bad happened" , shardedOutputCollection == res["result"].valuestrsafe() );
servers.insert( shard );
shardCounts.appendAs( res["counts"] , shard.c_str() );
BSONObjIterator j( res["counts"].embeddedObjectUserCheck() );
while ( j.more() ){
BSONElement temp = j.next();
counts[temp.fieldName()] += temp.numberLong();
}
}
BSONObj sortKey = BSON( "_id" << 1 );
ParallelSortClusteredCursor cursor( servers , dbname + "." + shardedOutputCollection ,
Query().sort( sortKey ) );
auto_ptr<Scope> s = globalScriptEngine->getPooledScope( ns );
ScriptingFunction reduceFunction = s->createFunction( mr.reduceCode.c_str() );
ScriptingFunction finalizeFunction = 0;
if ( mr.finalizeCode.size() )
finalizeFunction = s->createFunction( mr.finalizeCode.c_str() );
BSONList values;
result.append( "result" , mr.finalShort );
DBDirectClient db;
while ( cursor.more() ){
BSONObj t = cursor.next().getOwned();
if ( values.size() == 0 ){
values.push_back( t );
continue;
}
if ( t.woSortOrder( *(values.begin()) , sortKey ) == 0 ){
values.push_back( t );
continue;
}
db.insert( mr.tempLong , reduceValues( values , s.get() , reduceFunction , 1 , finalizeFunction ) );
values.clear();
values.push_back( t );
}
if ( values.size() )
db.insert( mr.tempLong , reduceValues( values , s.get() , reduceFunction , 1 , finalizeFunction ) );
long long finalCount = mr.renameIfNeeded( db );
log(0) << " mapreducefinishcommand " << mr.finalLong << " " << finalCount << endl;
for ( set<ServerAndQuery>::iterator i=servers.begin(); i!=servers.end(); i++ ){
ScopedDbConnection conn( i->_server );
conn->dropCollection( dbname + "." + shardedOutputCollection );
}
result.append( "shardCounts" , shardCounts.obj() );
{
BSONObjBuilder c;
for ( map<string,long long>::iterator i=counts.begin(); i!=counts.end(); i++ ){
c.append( i->first , i->second );
}
result.append( "counts" , c.obj() );
}
return 1;
}