bool Pipeline::run(BSONObjBuilder &result, string &errmsg) {
massert(16600, "should not have an empty pipeline",
!sources.empty());
/* chain together the sources we found */
DocumentSource* prevSource = sources.front().get();
for(SourceContainer::iterator iter(sources.begin() + 1),
listEnd(sources.end());
iter != listEnd;
++iter) {
intrusive_ptr<DocumentSource> pTemp(*iter);
pTemp->setSource(prevSource);
prevSource = pTemp.get();
}
/*
Iterate through the resulting documents, and add them to the result.
We do this even if we're doing an explain, in order to capture
the document counts and other stats. However, we don't capture
the result documents for explain.
*/
if (explain) {
if (!pCtx->getInRouter())
writeExplainShard(result);
else {
writeExplainMongos(result);
}
}
else {
// the array in which the aggregation results reside
// cant use subArrayStart() due to error handling
BSONArrayBuilder resultArray;
DocumentSource* finalSource = sources.back().get();
for(bool hasDoc = !finalSource->eof(); hasDoc; hasDoc = finalSource->advance()) {
Document pDocument(finalSource->getCurrent());
/* add the document to the result set */
BSONObjBuilder documentBuilder (resultArray.subobjStart());
pDocument->toBson(&documentBuilder);
documentBuilder.doneFast();
// object will be too large, assert. the extra 1KB is for headers
uassert(16389,
str::stream() << "aggregation result exceeds maximum document size ("
<< BSONObjMaxUserSize / (1024 * 1024) << "MB)",
resultArray.len() < BSONObjMaxUserSize - 1024);
}
resultArray.done();
result.appendArray("result", resultArray.arr());
}
return true;
}
bool SyncSourceFeedback::updateUpstream() {
if (theReplSet->isPrimary()) {
// primary has no one to update to
return true;
}
BSONObjBuilder cmd;
cmd.append("replSetUpdatePosition", 1);
// create an array containing objects each member connected to us and for ourself
BSONArrayBuilder array (cmd.subarrayStart("optimes"));
OID myID = _me["_id"].OID();
{
for (map<mongo::OID, OpTime>::const_iterator itr = _slaveMap.begin();
itr != _slaveMap.end(); ++itr) {
BSONObjBuilder entry(array.subobjStart());
entry.append("_id", itr->first);
entry.append("optime", itr->second);
if (itr->first == myID) {
entry.append("config", theReplSet->myConfig().asBson());
}
else {
entry.append("config", _members[itr->first]->config().asBson());
}
entry.doneFast();
}
}
array.done();
BSONObj res;
bool ok;
try {
ok = _connection->runCommand("admin", cmd.obj(), res);
}
catch (const DBException& e) {
log() << "SyncSourceFeedback error sending update: " << e.what() << endl;
resetConnection();
return false;
}
if (!ok) {
log() << "SyncSourceFeedback error sending update, response: " << res.toString() <<endl;
resetConnection();
return false;
}
return true;
}
void Pipeline::run(BSONObjBuilder& result) {
// We should not get here in the explain case.
verify(!pCtx->isExplain);
// the array in which the aggregation results reside
// cant use subArrayStart() due to error handling
BSONArrayBuilder resultArray;
while (auto next = getNext()) {
// Add the document to the result set.
BSONObjBuilder documentBuilder(resultArray.subobjStart());
next->toBson(&documentBuilder);
documentBuilder.doneFast();
// Object will be too large, assert. The extra 1KB is for headers.
uassert(16389,
str::stream() << "aggregation result exceeds maximum document size ("
<< BSONObjMaxUserSize / (1024 * 1024)
<< "MB)",
resultArray.len() < BSONObjMaxUserSize - 1024);
}
resultArray.done();
result.appendArray("result", resultArray.arr());
}
void Pipeline::run(BSONObjBuilder& result) {
/*
Iterate through the resulting documents, and add them to the result.
We do this even if we're doing an explain, in order to capture
the document counts and other stats. However, we don't capture
the result documents for explain.
*/
if (explain) {
if (!pCtx->getInRouter())
writeExplainShard(result);
else {
writeExplainMongos(result);
}
}
else {
// the array in which the aggregation results reside
// cant use subArrayStart() due to error handling
BSONArrayBuilder resultArray;
DocumentSource* finalSource = sources.back().get();
for (bool hasDoc = !finalSource->eof(); hasDoc; hasDoc = finalSource->advance()) {
Document pDocument(finalSource->getCurrent());
/* add the document to the result set */
BSONObjBuilder documentBuilder (resultArray.subobjStart());
pDocument->toBson(&documentBuilder);
documentBuilder.doneFast();
// object will be too large, assert. the extra 1KB is for headers
uassert(16389,
str::stream() << "aggregation result exceeds maximum document size ("
<< BSONObjMaxUserSize / (1024 * 1024) << "MB)",
resultArray.len() < BSONObjMaxUserSize - 1024);
}
resultArray.done();
result.appendArray("result", resultArray.arr());
}
}
