本文整理汇总了C++中NamespaceDetails::cappedTruncateAfter方法的典型用法代码示例。如果您正苦于以下问题：C++ NamespaceDetails::cappedTruncateAfter方法的具体用法？C++ NamespaceDetails::cappedTruncateAfter怎么用？C++ NamespaceDetails::cappedTruncateAfter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NamespaceDetails的用法示例。
在下文中一共展示了NamespaceDetails::cappedTruncateAfter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: syncFixUp
//.........这里部分代码省略.........
assert( d.ns && *d.ns );
if( h.collectionsToResync.count(d.ns) ) {
/* we just synced this entire collection */
continue;
}
/* keep an archive of items rolled back */
shared_ptr<RemoveSaver>& rs = removeSavers[d.ns];
if ( ! rs )
rs.reset( new RemoveSaver( "rollback" , "" , d.ns ) );
// todo: lots of overhead in context, this can be faster
Client::Context c(d.ns, dbpath, 0, /*doauth*/false);
if( i->second.isEmpty() ) {
// wasn't on the primary; delete.
/* TODO1.6 : can't delete from a capped collection. need to handle that here. */
deletes++;
NamespaceDetails *nsd = nsdetails(d.ns);
if( nsd ) {
if( nsd->capped ) {
/* can't delete from a capped collection - so we truncate instead. if this item must go,
so must all successors!!! */
try {
/** todo: IIRC cappedTrunateAfter does not handle completely empty. todo. */
// this will crazy slow if no _id index.
long long start = Listener::getElapsedTimeMillis();
DiskLoc loc = Helpers::findOne(d.ns, pattern, false);
if( Listener::getElapsedTimeMillis() - start > 200 )
log() << "replSet warning roll back slow no _id index for " << d.ns << " perhaps?" << rsLog;
//would be faster but requires index: DiskLoc loc = Helpers::findById(nsd, pattern);
if( !loc.isNull() ) {
try {
nsd->cappedTruncateAfter(d.ns, loc, true);
}
catch(DBException& e) {
if( e.getCode() == 13415 ) {
// hack: need to just make cappedTruncate do this...
nsd->emptyCappedCollection(d.ns);
}
else {
throw;
}
}
}
}
catch(DBException& e) {
log() << "replSet error rolling back capped collection rec " << d.ns << ' ' << e.toString() << rsLog;
}
}
else {
try {
deletes++;
deleteObjects(d.ns, pattern, /*justone*/true, /*logop*/false, /*god*/true, rs.get() );
}
catch(...) {
log() << "replSet error rollback delete failed ns:" << d.ns << rsLog;
}
}
// did we just empty the collection? if so let's check if it even exists on the source.
if( nsd->stats.nrecords == 0 ) {
try {
string sys = cc().database()->name + ".system.namespaces";
bo o = them->findOne(sys, QUERY("name"<<d.ns));
if( o.isEmpty() ) {
// we should drop