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some more ideas about duplicates

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This commit is contained in:
Blue 2023-08-17 11:45:11 -03:00
parent f0727aa73d
commit 06e1aca45a
Signed by: blue
GPG Key ID: 9B203B252A63EE38
8 changed files with 139 additions and 24 deletions
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21
src/base.h
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@ -48,6 +48,12 @@ class Cache;
typedef MDB_txn* TransactionID; /**<I'm going to use transaction pointers as transaction IDs*/
enum Duplicates { /**<Duplicates mode:*/
uniqueKey, /** - no duplicate keys allowed*/
uniquePair, /** - no duplicate key <b>AND</b> value pairs allowed*/
full /** - any configuration of duplicates goes*/
};
class Base {
friend class iStorage;
public:
@ -69,7 +75,7 @@ public:
void abortTransaction(TransactionID id) const;
template <class K, class V>
LMDBAL::Storage<K, V>* addStorage(const std::string& storageName, bool duplicates = false);
LMDBAL::Storage<K, V>* addStorage(const std::string& storageName, Duplicates duplicates = uniqueKey);
template <class K, class V>
LMDBAL::Cache<K, V>* addCache(const std::string& storageName);
@ -115,6 +121,7 @@ private:
* The LMDBAL::Base must be closed
*
* \param[in] storageName - storage name
* \param[in] duplicates - LMDBAL::Duplicates duplicates mode (uniqueKey by default)
*
* \returns storage pointer. LMDBAL::Base keeps the ownership of the added storage, you don't need to destoroy it
*
@ -125,10 +132,10 @@ private:
* \exception LMDBAL::StorageDuplicate thrown if somebody tries to add storage with repeating name
*/
template <class K, class V>
LMDBAL::Storage<K, V>* LMDBAL::Base::addStorage(const std::string& storageName, bool duplicates) {
if (opened) {
LMDBAL::Storage<K, V>* LMDBAL::Base::addStorage(const std::string& storageName, Duplicates duplicates) {
if (opened)
throw Opened(name, "add storage " + storageName);
}
Storage<K, V>* storage = new Storage<K, V>(this, storageName, duplicates);
std::pair<Storages::const_iterator, bool> pair = storages.insert(std::make_pair(storageName, (iStorage*)storage));
if (!pair.second)
@ -154,10 +161,10 @@ LMDBAL::Storage<K, V>* LMDBAL::Base::addStorage(const std::string& storageName,
*/
template<class K, class V>
LMDBAL::Cache<K, V> * LMDBAL::Base::addCache(const std::string& storageName) {
if (opened) {
if (opened)
throw Opened(name, "add cache " + storageName);
}
Cache<K, V>* cache = new Cache<K, V>(this, storageName, false);
Cache<K, V>* cache = new Cache<K, V>(this, storageName, uniqueKey);
std::pair<Storages::const_iterator, bool> pair = storages.insert(std::make_pair(storageName, (iStorage*)cache));
if (!pair.second)
throw StorageDuplicate(name, storageName);

2
src/cache.h
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@ -51,7 +51,7 @@ class Cache : public Storage<K, V> {
typedef std::map<TransactionID, Queue> TransactionCache;
protected:
Cache(Base* parent, const std::string& name, bool duplicates = false);
Cache(Base* parent, const std::string& name, Duplicates duplicates = uniqueKey);
~Cache() override;
virtual void transactionStarted(TransactionID txn, bool readOnly) const override;

4
src/cache.hpp
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@ -41,10 +41,10 @@
*
* \param[in] parent - LMDBAL::Base pointer for the owning database (borrowed)
* \param[in] name - the name of the storage
* \param[in] duplicates - true if storage supports duplicates, false otherwise (false by default)
* \param[in] duplicates - LMDBAL::Duplicates duplicates mode (uniqueKey by default)
*/
template<class K, class V>
LMDBAL::Cache<K, V>::Cache(Base* parent, const std::string& name, bool duplicates):
LMDBAL::Cache<K, V>::Cache(Base* parent, const std::string& name, Duplicates duplicates):
Storage<K, V>(parent, name, duplicates),
mode(Mode::nothing),
cache(new std::map<K, V>()),

4
src/storage.cpp
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@ -33,9 +33,9 @@
*
* \param[in] parent - LMDBAL::Base pointer for the owning database (borrowed)
* \param[in] name - the name of the storage
* \param[in] duplicates - true if storage supports duplicates, false otherwise (false by default)
* \param[in] duplicates - LMDBAL::Duplicates duplicates mode (uniqueKey by default)
*/
LMDBAL::iStorage::iStorage(Base* parent, const std::string& name, bool duplicates):
LMDBAL::iStorage::iStorage(Base* parent, const std::string& name, Duplicates duplicates):
dbi(),
db(parent),
name(name),

11
src/storage.h
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@ -26,6 +26,7 @@
#include "cursor.h"
class BaseTest;
class DuplicatesTest;
namespace LMDBAL {
@ -34,9 +35,8 @@ typedef uint32_t SizeType;
class iStorage {
friend class Base;
public:
protected:
iStorage(Base* parent, const std::string& name, bool duplicates = false);
iStorage(Base* parent, const std::string& name, Duplicates duplicates = uniqueKey);
virtual ~iStorage();
/**
@ -81,7 +81,7 @@ protected:
MDB_dbi dbi; /**<\brief lmdb storage handle*/
Base* db; /**<\brief parent database pointer (borrowed)*/
const std::string name; /**<\brief this storage name*/
const bool duplicates; /**<\brief true if storage supports duplicates*/
const Duplicates duplicates; /**<\brief true if storage supports duplicates*/
inline static const std::string dropMethodName = "drop"; /**<\brief member function name, just for exceptions*/
inline static const std::string countMethodName = "count"; /**<\brief member function name, just for exceptions*/
@ -99,7 +99,7 @@ protected:
protected:
template <class K, class V>
int makeStorage(MDB_txn* transaction, bool duplicates);
int makeStorage(MDB_txn* transaction, Duplicates duplicates = uniqueKey);
template <class T>
static std::string toString(const T& value);
@ -108,10 +108,11 @@ protected:
template <class K, class V>
class Storage : public iStorage {
friend class ::BaseTest;
friend class ::DuplicatesTest;
friend class Base;
friend class Cursor<K, V>;
protected:
Storage(Base* parent, const std::string& name, bool duplicates = false);
Storage(Base* parent, const std::string& name, Duplicates duplicates = uniqueKey);
~Storage() override;
virtual void discoveredRecord(const K& key, const V& value) const;

30
src/storage.hpp
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@ -43,10 +43,10 @@
*
* \param[in] parent - LMDBAL::Base pointer for the owning database (borrowed)
* \param[in] name - the name of the storage
* \param[in] duplicates - true if storage supports duplicates, false otherwise (false by default)
* \param[in] duplicates - LMDBAL::Duplicates duplicates mode (uniqueKey by default)
*/
template<class K, class V>
LMDBAL::Storage<K, V>::Storage(Base* parent, const std::string& name, bool duplicates):
LMDBAL::Storage<K, V>::Storage(Base* parent, const std::string& name, Duplicates duplicates):
iStorage(parent, name, duplicates),
keySerializer(),
valueSerializer(),
@ -111,7 +111,20 @@ void LMDBAL::Storage<K, V>::addRecord(const K& key, const V& value, TransactionI
MDB_val lmdbKey = keySerializer.setData(key);
MDB_val lmdbData = valueSerializer.setData(value);
int rc = mdb_put(txn, dbi, &lmdbKey, &lmdbData, MDB_NOOVERWRITE);
unsigned int flags;
switch (duplicates) {
case uniqueKey:
flags = MDB_NOOVERWRITE;
break;
case uniquePair:
flags = MDB_NODUPDATA;
break;
case full:
flags = 0;
break;
}
int rc = mdb_put(txn, dbi, &lmdbKey, &lmdbData, flags);
if (rc != MDB_SUCCESS)
throwDuplicateOrUnknown(rc, toString(key));
}
@ -804,16 +817,19 @@ void LMDBAL::Storage<K, V>::discoveredRecord(const K& key, const V& value, Trans
* This infrastructure also allowes us to customize mdb_dbi_open call in the future
*/
template<class K, class V>
inline int LMDBAL::iStorage::makeStorage(MDB_txn* transaction, bool duplicates) {
inline int LMDBAL::iStorage::makeStorage(MDB_txn* transaction, Duplicates duplicates) {
unsigned int flags = MDB_CREATE;
if constexpr (std::is_integral<K>::value)
flags |= MDB_INTEGERKEY;
if (duplicates) {
if (duplicates != uniqueKey) {
flags |= MDB_DUPSORT;
if constexpr (std::is_integral<V>::value)
flags |= MDB_INTEGERDUP | MDB_DUPFIXED;
if constexpr (std::is_scalar<K>::value && std::is_scalar<V>::value)
flags |= MDB_DUPFIXED;
else if constexpr (std::is_integral<V>::value)
flags |= MDB_INTEGERDUP;
}
return mdb_dbi_open(transaction, name.c_str(), flags, &dbi);

1
test/CMakeLists.txt
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@ -9,6 +9,7 @@ add_executable(runUnitTests
cachetransaction.cpp
storagecursor.cpp
cachecursor.cpp
duplicates.cpp
)
target_compile_options(runUnitTests PRIVATE -fPIC)

90
test/duplicates.cpp Normal file
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@ -0,0 +1,90 @@
#include <gtest/gtest.h>
#include "base.h"
#include "storage.h"
class DuplicatesTest : public ::testing::Test {
protected:
DuplicatesTest():
::testing::Test(),
t1(db->getStorage<int16_t, uint16_t>("sameSizeInts")),
t2(db->getStorage<std::string, int8_t>("stringInt")),
t3(db->getStorage<int64_t, int8_t>("differentSizeInts")),
t4(db->getStorage<uint16_t, double>("intDouble")) {}
~DuplicatesTest() {}
uint32_t getT1Flags() const {return t1->flags();}
uint32_t getT2Flags() const {return t2->flags();}
uint32_t getT3Flags() const {return t3->flags();}
uint32_t getT4Flags() const {return t4->flags();}
static void SetUpTestSuite() {
if (db == nullptr) {
db = new LMDBAL::Base("testBase");
db->addStorage<int16_t, uint16_t>("sameSizeInts", LMDBAL::uniquePair);
db->addStorage<std::string, int8_t>("stringInt", LMDBAL::uniquePair);
db->addStorage<int64_t, int8_t>("differentSizeInts", LMDBAL::uniquePair);
db->addStorage<uint16_t, double>("intDouble", LMDBAL::uniquePair);
db->open();
}
}
static void TearDownTestSuite() {
db->close();
db->removeDirectory();
delete db;
db = nullptr;
}
static LMDBAL::Base* db;
LMDBAL::Storage<int16_t, uint16_t>* t1;
LMDBAL::Storage<std::string, int8_t>* t2;
LMDBAL::Storage<int64_t, int8_t>* t3;
LMDBAL::Storage<uint16_t, double>* t4;
};
LMDBAL::Base* DuplicatesTest::db = nullptr;
TEST_F(DuplicatesTest, Flags) {
uint32_t t1Flags = getT1Flags();
uint32_t t2Flags = getT2Flags();
uint32_t t3Flags = getT3Flags();
uint32_t t4Flags = getT4Flags();
EXPECT_TRUE(t1Flags & MDB_INTEGERKEY);
EXPECT_TRUE(t1Flags & MDB_DUPSORT);
EXPECT_TRUE(t1Flags & MDB_DUPFIXED);
EXPECT_FALSE(t1Flags & MDB_INTEGERDUP);
EXPECT_FALSE(t2Flags & MDB_INTEGERKEY);
EXPECT_TRUE(t2Flags & MDB_DUPSORT);
EXPECT_FALSE(t2Flags & MDB_DUPFIXED);
EXPECT_TRUE(t2Flags & MDB_INTEGERDUP);
EXPECT_TRUE(t3Flags & MDB_INTEGERKEY);
EXPECT_TRUE(t3Flags & MDB_DUPSORT);
EXPECT_TRUE(t3Flags & MDB_DUPFIXED);
EXPECT_FALSE(t3Flags & MDB_INTEGERDUP);
EXPECT_TRUE(t4Flags & MDB_INTEGERKEY);
EXPECT_TRUE(t4Flags & MDB_DUPSORT);
EXPECT_TRUE(t4Flags & MDB_DUPFIXED);
EXPECT_FALSE(t4Flags & MDB_INTEGERDUP);
}
TEST_F(DuplicatesTest, Adding) {
t1->addRecord(1, 1);
t1->addRecord(2, 2);
t1->addRecord(2, 1);
t1->addRecord(1, 2);
EXPECT_THROW(t1->addRecord(1, 1), LMDBAL::Exist);
EXPECT_THROW(t1->addRecord(1, 2), LMDBAL::Exist);
EXPECT_THROW(t1->addRecord(2, 2), LMDBAL::Exist);
EXPECT_EQ(t1->count(), 4);
EXPECT_EQ(t1->getRecord(1), 1);
EXPECT_EQ(t1->getRecord(2), 1);
}