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Use LMOVE logic to handle RPOPLPUSH #1596

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Jul 19, 2023
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2 changes: 1 addition & 1 deletion src/commands/cmd_list.cc
Original file line number Diff line number Diff line change
Expand Up @@ -508,7 +508,7 @@ class CommandRPopLPUSH : public Commander {
Status Execute(Server *svr, Connection *conn, std::string *output) override {
redis::List list_db(svr->storage, conn->GetNamespace());
std::string elem;
auto s = list_db.RPopLPush(args_[1], args_[2], &elem);
auto s = list_db.LMove(args_[1], args_[2], false, true, &elem);
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if (!s.ok() && !s.IsNotFound()) {
return {Status::RedisExecErr, s.ToString()};
}
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18 changes: 0 additions & 18 deletions src/types/redis_list.cc
Original file line number Diff line number Diff line change
Expand Up @@ -433,24 +433,6 @@ rocksdb::Status List::Set(const Slice &user_key, int index, Slice elem) {
return storage_->Write(storage_->DefaultWriteOptions(), batch->GetWriteBatch());
}

rocksdb::Status List::RPopLPush(const Slice &src, const Slice &dst, std::string *elem) {
RedisType type = kRedisNone;
rocksdb::Status s = Type(dst, &type);
if (!s.ok()) return s;
if (type != kRedisNone && type != kRedisList) {
return rocksdb::Status::InvalidArgument(kErrMsgWrongType);
}

s = Pop(src, false, elem);
if (!s.ok()) return s;

uint64_t ret = 0;
std::vector<Slice> elems;
elems.emplace_back(*elem);
s = Push(dst, elems, true, &ret);
return s;
}

rocksdb::Status List::LMove(const rocksdb::Slice &src, const rocksdb::Slice &dst, bool src_left, bool dst_left,
std::string *elem) {
if (src == dst) {
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1 change: 0 additions & 1 deletion src/types/redis_list.h
Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,6 @@ class List : public Database {
rocksdb::Status PopMulti(const Slice &user_key, bool left, uint32_t count, std::vector<std::string> *elems);
rocksdb::Status Rem(const Slice &user_key, int count, const Slice &elem, uint64_t *removed_cnt);
rocksdb::Status Index(const Slice &user_key, int index, std::string *elem);
rocksdb::Status RPopLPush(const Slice &src, const Slice &dst, std::string *elem);
rocksdb::Status LMove(const Slice &src, const Slice &dst, bool src_left, bool dst_left, std::string *elem);
rocksdb::Status Push(const Slice &user_key, const std::vector<Slice> &elems, bool left, uint64_t *new_size);
rocksdb::Status PushX(const Slice &user_key, const std::vector<Slice> &elems, bool left, uint64_t *new_size);
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19 changes: 0 additions & 19 deletions tests/cppunit/types/list_test.cc
Original file line number Diff line number Diff line change
Expand Up @@ -314,25 +314,6 @@ TEST_F(RedisListSpecificTest, Trim) {
list_->Del(key_);
}

TEST_F(RedisListTest, RPopLPush) {
uint64_t ret = 0;
list_->Push(key_, fields_, true, &ret);
EXPECT_EQ(fields_.size(), ret);
Slice dst("test-list-rpoplpush-key");
for (auto &field : fields_) {
std::string elem;
list_->RPopLPush(key_, dst, &elem);
EXPECT_EQ(field.ToString(), elem);
}
for (auto &field : fields_) {
std::string elem;
list_->Pop(dst, false, &elem);
EXPECT_EQ(elem, field.ToString());
}
list_->Del(key_);
list_->Del(dst);
}

TEST_F(RedisListLMoveTest, LMoveSrcNotExist) {
std::string elem;
auto s = list_->LMove(key_, dst_key_, true, true, &elem);
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