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lmdb-safe
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interim pre-tuple

This commit is contained in:
bert hubert 2018-12-14 23:46:46 +01:00
parent d98d657765
commit ada45b45ba
2 changed files with 101 additions and 44 deletions
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30
lmdb-typed.cc
View File

@ -48,15 +48,15 @@ int main()
> tdbi(getMDBEnv("./typed.lmdb", MDB_NOSUBDIR, 0600), "records");
auto txn = tdbi.getRWTransaction();
cout<<"Currently have "<< txn.size()<< " entries"<<endl;
cout<<" " << txn.size1() << " " << txn.size2() << " " << txn.size3() << endl;
txn.clear();
#if 0
cout<<"Going to iterate over powerdns.com!"<<endl;
cout<<"Currently have "<< txn.size()<< " entries after clear"<<endl;
cout<<" " << txn.size1() << " " << txn.size2() << " " << txn.size3() << endl;
for(auto iter = txn.find1("powerdns.com"); iter != txn.end(); ++iter) {
cout << iter->qname << " " << iter->qtype << " " << iter->content <<endl;
}
cout<<"Done iterating"<<endl;
#endif
DNSResourceRecord rr;
rr.domain_id=0;
@ -102,11 +102,19 @@ int main()
id = txn.get1("powerdns.com", rr3);
cout<< id << endl;
cout<<"Going to iterate over powerdns.com!"<<endl;
for(auto iter = txn.find1("powerdns.com"); iter != txn.end(); ++iter) {
cout << iter->qname << " " << iter->qtype << " " << iter->content <<endl;
}
cout<<"Done iterating"<<endl;
txn.del(1);
DNSResourceRecord rr4;
id = txn.get3("ns1", rr4);
cout<<"Found "<<id<<": " << rr4.content <<endl;
// DNSResourceRecord rr4;
// id = txn.get3("ns1", rr4);
// cout<<"Found "<<id<<": " << rr4.content <<endl;
txn.commit();
}

115
lmdb-typed.hh
View File

@ -100,6 +100,13 @@ struct index_on
d_idx = env->openDB(str, flags);
}
uint32_t size(MDBRWTransaction& txn)
{
MDB_stat stat;
mdb_stat(txn, d_idx, &stat);
return stat.ms_entries;
}
typedef Type type;
MDBDbi d_idx;
@ -114,6 +121,11 @@ struct nullindex_t
void del(MDBRWTransaction& txn, const Class& t, uint32_t id)
{}
uint32_t size()
{
return 0;
}
void openDB(std::shared_ptr<MDBEnv>& env, string_view str, int flags)
{
@ -139,6 +151,8 @@ public:
I2 d_i2;
I3 d_i3;
I4 d_i4;
std::tuple<I1, I2, I3, I4> d_tuple;
class RWTransaction
{
@ -153,6 +167,14 @@ public:
rhs.d_parent = 0;
}
uint32_t size()
{
MDB_stat stat;
mdb_stat(d_txn, d_parent->d_main, &stat);
return stat.ms_entries;
}
uint32_t insert(const T& t)
{
uint32_t id = getMaxID(d_txn, d_parent->d_main) + 1;
@ -174,6 +196,7 @@ public:
serFromString(data.get<std::string>(), t);
return true;
}
void del(uint32_t id)
{
@ -182,12 +205,27 @@ public:
return;
d_txn.del(d_parent->d_main, id);
d_parent->d_i1.del(d_txn, t, id);
d_parent->d_i2.del(d_txn, t, id);
d_parent->d_i3.del(d_txn, t, id);
d_parent->d_i4.del(d_txn, t, id);
clearIndex(id, t);
}
void clear()
{
auto cursor = d_txn.getCursor(d_parent->d_main);
bool first = true;
MDBOutVal key, data;
while(!cursor.get(key, data, first ? MDB_FIRST : MDB_NEXT)) {
first = false;
T t;
serFromString(data.get<std::string>(), t);
clearIndex(key.get<uint32_t>(), t);
cursor.del();
}
}
uint32_t size1() { return d_parent->d_i1.size(d_txn); }
uint32_t size2() { return d_parent->d_i2.size(d_txn); }
uint32_t size3() { return d_parent->d_i3.size(d_txn); }
uint32_t size4() { return d_parent->d_i4.size(d_txn); }
uint32_t get1(const typename I1::type& key, T& out)
{
@ -231,31 +269,12 @@ public:
d_txn.abort();
}
private:
TypedDBI* d_parent;
MDBRWTransaction d_txn;
};
RWTransaction getRWTransaction()
{
return RWTransaction(this);
}
private:
std::shared_ptr<MDBEnv> d_env;
MDBDbi d_main;
std::string d_name;
};
#if 0
struct eiter1_t
{};
struct iter1_t
{
explicit iter1_t(MDBROTransaction && txn, const MDBDbi& dbi, const MDBDbi& main, const typename I1::type& key) : d_txn(std::move(txn)), d_cursor(d_txn.getCursor(dbi)), d_in(key), d_main(main)
explicit iter1_t(RWTransaction* parent, const typename I1::type& key) :
d_parent(parent), d_cursor(d_parent->d_txn.getCursor(d_parent->d_parent->d_i1.d_idx)), d_in(key)
{
d_key.d_mdbval = d_in.d_mdbval;
@ -264,7 +283,7 @@ private:
d_end = true;
return;
}
if(d_txn.get(d_main, id, data))
if(d_parent->d_txn.get(d_parent->d_parent->d_main, id, data))
throw std::runtime_error("Missing id in constructor");
serFromString(data.get<std::string>(), d_t);
@ -299,7 +318,7 @@ private:
d_end = true;
}
else {
if(d_txn.get(d_main, id, data))
if(d_parent->d_txn.get(d_parent->d_parent->d_main, id, data))
throw std::runtime_error("Missing id field");
serFromString(data.get<std::string>(), d_t);
@ -307,18 +326,17 @@ private:
return *this;
}
MDBROTransaction d_txn;
MDBROCursor d_cursor;
RWTransaction* d_parent;
MDBRWCursor d_cursor;
MDBOutVal d_key, d_data;
MDBInVal d_in;
bool d_end{false};
T d_t;
MDBDbi d_main;
};
iter1_t find1(const typename I1::type& key)
{
iter1_t ret{std::move(d_env->getROTransaction()), d_idx1.d_ix1 d_main, key};
iter1_t ret{this, key};
return ret;
};
@ -327,4 +345,35 @@ private:
return eiter1_t();
}
#endif
private:
void clearIndex(uint32_t id, const T& t)
{
d_parent->d_i1.del(d_txn, t, id);
d_parent->d_i2.del(d_txn, t, id);
d_parent->d_i3.del(d_txn, t, id);
d_parent->d_i4.del(d_txn, t, id);
}
TypedDBI* d_parent;
MDBRWTransaction d_txn;
};
RWTransaction getRWTransaction()
{
return RWTransaction(this);
}
private:
std::shared_ptr<MDBEnv> d_env;
MDBDbi d_main;
std::string d_name;
};