WalProxy.cpp

// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
// or implied. See the License for the specific language governing permissions and limitations under the License.

#include "db/wal/WalProxy.h"
#include "config/ServerConfig.h"
#include "db/wal/WalManager.h"
#include "db/wal/WalOperation.h"
#include "utils/Exception.h"

namespace milvus {
namespace engine {

WalProxy::WalProxy(const DBPtr& db, const DBOptions& options) : DBProxy(db, options) {
    // db must implemented
    if (db == nullptr) {
        throw Exception(DB_ERROR, "null pointer");
    }
}

Status
WalProxy::Start() {
    // let service start
    auto status = db_->Start();
    if (!status.ok()) {
        return status;
    }

    if (options_.wal_enable_) {
        WalManager::GetInstance().Start(options_);
        WalManager::GetInstance().Recovery(db_);
    }

    return status;
}

Status
WalProxy::Stop() {
    auto status = db_->Stop();

    if (options_.wal_enable_) {
        WalManager::GetInstance().Stop();
    }

    return status;
}

Status
WalProxy::Insert(const std::string& collection_name, const std::string& partition_name, DataChunkPtr& data_chunk,
                 idx_t op_id) {
    // write operation into disk
    InsertEntityOperationPtr op = std::make_shared<InsertEntityOperation>();
    op->collection_name_ = collection_name;
    op->partition_name = partition_name;
    op->data_chunk_ = data_chunk;

    return WalManager::GetInstance().RecordOperation(op, db_);
}

Status
WalProxy::DeleteEntityByID(const std::string& collection_name, const IDNumbers& entity_ids, idx_t op_id) {
    // write operation into disk
    DeleteEntityOperationPtr op = std::make_shared<DeleteEntityOperation>();
    op->collection_name_ = collection_name;
    op->entity_ids_ = entity_ids;

    return WalManager::GetInstance().RecordOperation(op, db_);
}

}  // namespace engine
}  // namespace milvus