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b9e8acb5b2
* #2370 clean compile warning Signed-off-by: yudong.cai <yudong.cai@zilliz.com> * update changelog Signed-off-by: yudong.cai <yudong.cai@zilliz.com>
126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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#include "db/IDGenerator.h"
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#include "utils/Log.h"
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#include <assert.h>
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#include <fiu-local.h>
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#include <chrono>
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#include <iostream>
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#include <string>
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namespace milvus {
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namespace engine {
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IDGenerator::~IDGenerator() = default;
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constexpr size_t SimpleIDGenerator::MAX_IDS_PER_MICRO;
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IDNumber
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SimpleIDGenerator::GetNextIDNumber() {
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auto now = std::chrono::system_clock::now();
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auto micros = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
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return micros * MAX_IDS_PER_MICRO;
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}
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Status
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SimpleIDGenerator::NextIDNumbers(size_t n, IDNumbers& ids) {
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if (n > MAX_IDS_PER_MICRO) {
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NextIDNumbers(n - MAX_IDS_PER_MICRO, ids);
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NextIDNumbers(MAX_IDS_PER_MICRO, ids);
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return Status::OK();
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}
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if (n <= 0) {
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return Status::OK();
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}
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auto now = std::chrono::system_clock::now();
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auto micros = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
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micros *= MAX_IDS_PER_MICRO;
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for (size_t pos = 0; pos < n; ++pos) {
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ids.push_back(micros + pos);
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}
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return Status::OK();
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}
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Status
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SimpleIDGenerator::GetNextIDNumbers(size_t n, IDNumbers& ids) {
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ids.clear();
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NextIDNumbers(n, ids);
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return Status::OK();
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}
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IDNumber
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SafeIDGenerator::GetNextIDNumber() {
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auto now = std::chrono::system_clock::now();
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auto micros = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
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std::lock_guard<std::mutex> lock(mtx_);
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if (micros <= time_stamp_ms_) {
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time_stamp_ms_ += 1;
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} else {
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time_stamp_ms_ = micros;
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}
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return time_stamp_ms_ * MAX_IDS_PER_MICRO;
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}
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Status
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SafeIDGenerator::GetNextIDNumbers(size_t n, IDNumbers& ids) {
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ids.clear();
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std::lock_guard<std::mutex> lock(mtx_);
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while (n > 0) {
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if (n > MAX_IDS_PER_MICRO) {
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Status status = NextIDNumbers(MAX_IDS_PER_MICRO, ids);
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if (!status.ok()) {
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return status;
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}
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n -= MAX_IDS_PER_MICRO;
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} else {
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Status status = NextIDNumbers(n, ids);
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if (!status.ok()) {
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return status;
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}
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break;
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}
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}
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return Status::OK();
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}
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Status
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SafeIDGenerator::NextIDNumbers(size_t n, IDNumbers& ids) {
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if (n <= 0 || n > MAX_IDS_PER_MICRO) {
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std::string msg = "Invalid ID number: " + std::to_string(n);
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LOG_ENGINE_ERROR_ << msg;
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return Status(SERVER_UNEXPECTED_ERROR, msg);
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}
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auto now = std::chrono::system_clock::now();
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int64_t micros = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
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if (micros <= time_stamp_ms_) {
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time_stamp_ms_ += 1;
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} else {
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time_stamp_ms_ = micros;
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}
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int64_t ID_high_part = time_stamp_ms_ * MAX_IDS_PER_MICRO;
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for (size_t pos = 0; pos < n; ++pos) {
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ids.push_back(ID_high_part + pos);
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}
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return Status::OK();
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}
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} // namespace engine
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} // namespace milvus
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