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some more tests, one subtle but important bugfix with cache

This commit is contained in:
Blue 2023-08-12 18:28:49 -03:00
parent 8ff5672655
commit d57d27f952
Signed by: blue
GPG Key ID: 9B203B252A63EE38
4 changed files with 132 additions and 13 deletions
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2
CMakeLists.txt
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@ -1,7 +1,7 @@
cmake_minimum_required(VERSION 3.16)
project(LMDBAL
VERSION 0.3.1
VERSION 0.4.0
DESCRIPTION "LMDB (Lightning Memory-Mapped Database Manager) Abstraction Layer"
LANGUAGES CXX
)

4
src/cache.h
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@ -57,6 +57,9 @@ protected:
virtual void transactionStarted(TransactionID txn, bool readOnly) const override;
virtual void transactionCommited(TransactionID txn) override;
virtual void transactionAborted(TransactionID txn) const override;
virtual void discoveredRecord(const K& key, const V& value) const override;
virtual void discoveredRecord(const K& key, const V& value, TransactionID txn) const override;
private:
void handleMode() const;
@ -70,6 +73,7 @@ private:
void handleReplaceAll(std::map<K, V>* data);
void handleAddRecords(const std::map<K, V>& data, bool overwrite, SizeType newSize);
void handleDrop();
void appendToCache(const K& key, const V& value) const;
public:
using Storage<K, V>::drop;

40
src/cache.hpp
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@ -235,8 +235,7 @@ void LMDBAL::Cache<K, V>::getRecord(const K& key, V& out) const {
try {
Storage<K, V>::getRecord(key, out);
cache->insert(std::make_pair(key, out));
handleMode();
appendToCache(key, out);
return;
} catch (const NotFound& error) {
if (mode != Mode::full)
@ -337,10 +336,9 @@ void LMDBAL::Cache<K, V>::getRecord(const K& key, V& out, TransactionID txn) con
try {
Storage<K, V>::getRecord(key, out, txn);
if (!currentTransaction) {
cache->insert(std::make_pair(key, out));
handleMode();
}
if (!currentTransaction)
appendToCache(key, out);
return;
} catch (const NotFound& error) {
if (!currentTransaction && mode != Mode::full)
@ -350,6 +348,18 @@ void LMDBAL::Cache<K, V>::getRecord(const K& key, V& out, TransactionID txn) con
}
}
template<class K, class V>
void LMDBAL::Cache<K, V>::discoveredRecord(const K& key, const V& value) const {
appendToCache(key, value);
}
template<class K, class V>
void LMDBAL::Cache<K, V>::discoveredRecord(const K& key, const V& value, TransactionID txn) const {
typename TransactionCache::const_iterator tc = transactionCache->find(txn);
if (tc == transactionCache->end()) //there is a way to look though all the records in transaction log and cache the new pair
discoveredRecord(key, value); //if there is nothing in transaction log about it, but it seems like too much for a small gain
}
template<class K, class V>
bool LMDBAL::Cache<K, V>::checkRecord(const K& key) const {
iStorage::ensureOpened(iStorage::checkRecordMethodName);
@ -363,8 +373,8 @@ bool LMDBAL::Cache<K, V>::checkRecord(const K& key) const {
try {
V value = Storage<K, V>::getRecord(key);
cache->insert(std::make_pair(key, value));
handleMode();
appendToCache(key, value);
return true;
} catch (const NotFound& error) {
if (mode != Mode::full)
@ -438,10 +448,9 @@ bool LMDBAL::Cache<K, V>::checkRecord(const K& key, TransactionID txn) const {
try {
V value = Storage<K, V>::getRecord(key, txn);
if (!currentTransaction) {
cache->insert(std::make_pair(key, value));
handleMode();
}
if (!currentTransaction)
appendToCache(key, value);
return true;
} catch (const NotFound& error) {
if (!currentTransaction && mode != Mode::full)
@ -451,6 +460,13 @@ bool LMDBAL::Cache<K, V>::checkRecord(const K& key, TransactionID txn) const {
}
}
template<class K, class V>
void LMDBAL::Cache<K, V>::appendToCache(const K& key, const V& value) const {
typename std::pair<typename std::map<K, V>::const_iterator, bool> pair = cache->insert(std::make_pair(key, value));
if (pair.second)
handleMode();
}
template<class K, class V>
std::map<K, V> LMDBAL::Cache<K, V>::readAll() const {
iStorage::ensureOpened(iStorage::readAllMethodName);

99
test/storagecursor.cpp
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@ -34,6 +34,7 @@ protected:
static LMDBAL::Base* db;
static LMDBAL::Cursor<uint64_t, std::string>* cursor;
static LMDBAL::Cursor<uint64_t, std::string>* emptyCursor;
static LMDBAL::TransactionID transaction;
LMDBAL::Storage<uint64_t, std::string>* table;
LMDBAL::Storage<uint64_t, std::string>* emptyTable;
@ -42,6 +43,7 @@ protected:
LMDBAL::Base* StorageCursorTest::db = nullptr;
LMDBAL::Cursor<uint64_t, std::string>* StorageCursorTest::cursor = nullptr;
LMDBAL::Cursor<uint64_t, std::string>* StorageCursorTest::emptyCursor = nullptr;
LMDBAL::TransactionID StorageCursorTest::transaction = nullptr;
static const std::map<uint64_t, std::string> data({
{245665783, "bothering nerds"},
@ -167,9 +169,106 @@ TEST_F(StorageCursorTest, Destruction) {
EXPECT_THROW(cursor->next(), LMDBAL::CursorNotReady);
EXPECT_THROW(cursor->prev(), LMDBAL::CursorNotReady);
EXPECT_THROW(cursor->current(), LMDBAL::CursorNotReady);
EXPECT_THROW(emptyTable->destroyCursor(cursor), LMDBAL::Unknown);
table->destroyCursor(cursor);
cursor = table->createCursor();
}
TEST_F(StorageCursorTest, FirstPublic) {
transaction = db->beginReadOnlyTransaction();
cursor->open(transaction);
std::pair<uint64_t, std::string> element = cursor->first();
std::map<uint64_t, std::string>::const_iterator reference = data.begin();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
TEST_F(StorageCursorTest, NextPublic) {
std::map<uint64_t, std::string>::const_iterator reference = data.begin();
reference++;
for (; reference != data.end(); ++reference) {
std::pair<uint64_t, std::string> element = cursor->next();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
EXPECT_THROW(cursor->next(), LMDBAL::NotFound);
std::pair<uint64_t, std::string> element = cursor->first();
reference = data.begin();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
TEST_F(StorageCursorTest, LastPublic) {
std::pair<uint64_t, std::string> element = cursor->last();
std::map<uint64_t, std::string>::const_reverse_iterator reference = data.rbegin();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
TEST_F(StorageCursorTest, PrevPublic) {
std::map<uint64_t, std::string>::const_reverse_iterator reference = data.rbegin();
reference++;
for (; reference != data.rend(); ++reference) {
std::pair<uint64_t, std::string> element = cursor->prev();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
EXPECT_THROW(cursor->prev(), LMDBAL::NotFound);
std::pair<uint64_t, std::string> element = cursor->last();
reference = data.rbegin();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
TEST_F(StorageCursorTest, CurrentPublic) {
std::pair<uint64_t, std::string> element = cursor->first();
std::map<uint64_t, std::string>::const_iterator reference = data.begin();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
element = cursor->current();
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
cursor->next();
element = cursor->current();
++reference;
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
cursor->next();
cursor->next();
cursor->prev();
element = cursor->current();
++reference;
++reference;
--reference;
EXPECT_EQ(element.first, reference->first);
EXPECT_EQ(element.second, reference->second);
}
TEST_F(StorageCursorTest, CornerCases) {
db->abortTransaction(transaction);
EXPECT_THROW(cursor->current(), LMDBAL::Unknown);
cursor->close();
emptyCursor->open();
EXPECT_THROW(emptyCursor->first(), LMDBAL::NotFound);
EXPECT_THROW(emptyCursor->last(), LMDBAL::NotFound);