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db_memtable_test.cc
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db_memtable_test.cc
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include <memory>
#include <string>
#include "db/db_test_util.h"
#include "db/memtable.h"
#include "port/stack_trace.h"
#include "rocksdb/memtablerep.h"
#include "rocksdb/slice_transform.h"
namespace rocksdb {
class DBMemTableTest : public DBTestBase {
public:
DBMemTableTest() : DBTestBase("/db_memtable_test") {}
};
class MockMemTableRep : public MemTableRep {
public:
explicit MockMemTableRep(Allocator* allocator, MemTableRep* rep)
: MemTableRep(allocator), rep_(rep), num_insert_with_hint_(0) {}
virtual KeyHandle Allocate(const size_t len, char** buf) override {
return rep_->Allocate(len, buf);
}
virtual void Insert(KeyHandle handle) override {
return rep_->Insert(handle);
}
virtual void InsertWithHint(KeyHandle handle, void** hint) override {
num_insert_with_hint_++;
ASSERT_NE(nullptr, hint);
last_hint_in_ = *hint;
rep_->InsertWithHint(handle, hint);
last_hint_out_ = *hint;
}
virtual bool Contains(const char* key) const override {
return rep_->Contains(key);
}
virtual void Get(const LookupKey& k, void* callback_args,
bool (*callback_func)(void* arg,
const char* entry)) override {
rep_->Get(k, callback_args, callback_func);
}
virtual size_t ApproximateMemoryUsage() override {
return rep_->ApproximateMemoryUsage();
}
virtual Iterator* GetIterator(Arena* arena) override {
return rep_->GetIterator(arena);
}
void* last_hint_in() { return last_hint_in_; }
void* last_hint_out() { return last_hint_out_; }
int num_insert_with_hint() { return num_insert_with_hint_; }
private:
std::unique_ptr<MemTableRep> rep_;
void* last_hint_in_;
void* last_hint_out_;
int num_insert_with_hint_;
};
class MockMemTableRepFactory : public MemTableRepFactory {
public:
virtual MemTableRep* CreateMemTableRep(const MemTableRep::KeyComparator& cmp,
Allocator* allocator,
const SliceTransform* transform,
Logger* logger) override {
SkipListFactory factory;
MemTableRep* skiplist_rep =
factory.CreateMemTableRep(cmp, allocator, transform, logger);
mock_rep_ = new MockMemTableRep(allocator, skiplist_rep);
return mock_rep_;
}
virtual MemTableRep* CreateMemTableRep(const MemTableRep::KeyComparator& cmp,
Allocator* allocator,
const SliceTransform* transform,
Logger* logger,
uint32_t column_family_id) override {
last_column_family_id_ = column_family_id;
return CreateMemTableRep(cmp, allocator, transform, logger);
}
virtual const char* Name() const override { return "MockMemTableRepFactory"; }
MockMemTableRep* rep() { return mock_rep_; }
bool IsInsertConcurrentlySupported() const override { return false; }
uint32_t GetLastColumnFamilyId() { return last_column_family_id_; }
private:
MockMemTableRep* mock_rep_;
// workaround since there's no port::kMaxUint32 yet.
uint32_t last_column_family_id_ = static_cast<uint32_t>(-1);
};
class TestPrefixExtractor : public SliceTransform {
public:
virtual const char* Name() const override { return "TestPrefixExtractor"; }
virtual Slice Transform(const Slice& key) const override {
const char* p = separator(key);
if (p == nullptr) {
return Slice();
}
return Slice(key.data(), p - key.data() + 1);
}
virtual bool InDomain(const Slice& key) const override {
return separator(key) != nullptr;
}
virtual bool InRange(const Slice& key) const override { return false; }
private:
const char* separator(const Slice& key) const {
return reinterpret_cast<const char*>(memchr(key.data(), '_', key.size()));
}
};
TEST_F(DBMemTableTest, InsertWithHint) {
Options options;
options.allow_concurrent_memtable_write = false;
options.create_if_missing = true;
options.memtable_factory.reset(new MockMemTableRepFactory());
options.memtable_insert_with_hint_prefix_extractor.reset(
new TestPrefixExtractor());
options.env = env_;
Reopen(options);
MockMemTableRep* rep =
reinterpret_cast<MockMemTableRepFactory*>(options.memtable_factory.get())
->rep();
ASSERT_OK(Put("foo_k1", "foo_v1"));
ASSERT_EQ(nullptr, rep->last_hint_in());
void* hint_foo = rep->last_hint_out();
ASSERT_OK(Put("foo_k2", "foo_v2"));
ASSERT_EQ(hint_foo, rep->last_hint_in());
ASSERT_EQ(hint_foo, rep->last_hint_out());
ASSERT_OK(Put("foo_k3", "foo_v3"));
ASSERT_EQ(hint_foo, rep->last_hint_in());
ASSERT_EQ(hint_foo, rep->last_hint_out());
ASSERT_OK(Put("bar_k1", "bar_v1"));
ASSERT_EQ(nullptr, rep->last_hint_in());
void* hint_bar = rep->last_hint_out();
ASSERT_NE(hint_foo, hint_bar);
ASSERT_OK(Put("bar_k2", "bar_v2"));
ASSERT_EQ(hint_bar, rep->last_hint_in());
ASSERT_EQ(hint_bar, rep->last_hint_out());
ASSERT_EQ(5, rep->num_insert_with_hint());
ASSERT_OK(Put("whitelisted", "vvv"));
ASSERT_EQ(5, rep->num_insert_with_hint());
ASSERT_EQ("foo_v1", Get("foo_k1"));
ASSERT_EQ("foo_v2", Get("foo_k2"));
ASSERT_EQ("foo_v3", Get("foo_k3"));
ASSERT_EQ("bar_v1", Get("bar_k1"));
ASSERT_EQ("bar_v2", Get("bar_k2"));
ASSERT_EQ("vvv", Get("whitelisted"));
}
TEST_F(DBMemTableTest, ColumnFamilyId) {
// Verifies MemTableRepFactory is told the right column family id.
Options options;
options.allow_concurrent_memtable_write = false;
options.create_if_missing = true;
options.memtable_factory.reset(new MockMemTableRepFactory());
DestroyAndReopen(options);
CreateAndReopenWithCF({"pikachu"}, options);
for (int cf = 0; cf < 2; ++cf) {
ASSERT_OK(Put(cf, "key", "val"));
ASSERT_OK(Flush(cf));
ASSERT_EQ(
cf, static_cast<MockMemTableRepFactory*>(options.memtable_factory.get())
->GetLastColumnFamilyId());
}
}
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}