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70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "db/IDGenerator.h"
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#include <chrono>
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#include <assert.h>
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#include <iostream>
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namespace zilliz {
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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>(
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now.time_since_epoch()).count();
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return micros * MAX_IDS_PER_MICRO;
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}
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void
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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;
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}
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if (n <= 0) {
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return;
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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>(
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now.time_since_epoch()).count();
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micros *= MAX_IDS_PER_MICRO;
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for (int pos = 0; pos < n; ++pos) {
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ids.push_back(micros + pos);
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}
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}
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void
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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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}
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} // namespace engine
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} // namespace milvus
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} // namespace zilliz
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