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https://gitee.com/milvus-io/milvus.git
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89 lines
3.0 KiB
Go
89 lines
3.0 KiB
Go
// Licensed to the LF AI & Data foundation 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tsoutil
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import (
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"path"
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"time"
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etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
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"github.com/milvus-io/milvus/internal/util/typeutil"
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clientv3 "go.etcd.io/etcd/client/v3"
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)
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const (
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logicalBits = 18
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logicalBitsMask = (1 << logicalBits) - 1
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)
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// ComposeTS returns a timestamp composed of physical part and logical part
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func ComposeTS(physical, logical int64) uint64 {
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return uint64((physical << logicalBits) + logical)
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}
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// ComposeTSByTime returns a timestamp composed of physical time.Time and logical time
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func ComposeTSByTime(physical time.Time, logical int64) uint64 {
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return ComposeTS(physical.UnixNano()/int64(time.Millisecond), logical)
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}
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// GetCurrentTime returns the current timestamp
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func GetCurrentTime() typeutil.Timestamp {
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return ComposeTSByTime(time.Now(), 0)
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}
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// ParseTS parses the ts to (physical,logical).
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func ParseTS(ts uint64) (time.Time, uint64) {
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logical := ts & logicalBitsMask
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physical := ts >> logicalBits
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physicalTime := time.Unix(int64(physical/1000), int64(physical)%1000*time.Millisecond.Nanoseconds())
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return physicalTime, logical
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}
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// ParseHybridTs parses the ts to (physical, logical), physical part is of utc-timestamp format.
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func ParseHybridTs(ts uint64) (int64, int64) {
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logical := ts & logicalBitsMask
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physical := ts >> logicalBits
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return int64(physical), int64(logical)
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}
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// CalculateDuration returns the number of milliseconds obtained by subtracting ts2 from ts1.
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func CalculateDuration(ts1, ts2 typeutil.Timestamp) int64 {
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p1, _ := ParseHybridTs(ts1)
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p2, _ := ParseHybridTs(ts2)
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return p1 - p2
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}
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// Mod24H parses the ts to millisecond in one day
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func Mod24H(ts uint64) uint64 {
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logical := ts & logicalBitsMask
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physical := ts >> logicalBits
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physical = physical % (uint64(24 * 60 * 60 * 1000))
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return (physical << logicalBits) | logical
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}
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// AddPhysicalDurationOnTs adds physical interval on ts
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func AddPhysicalDurationOnTs(ts uint64, duration time.Duration) uint64 {
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msecs := duration.Milliseconds()
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physical, logical := ParseHybridTs(ts)
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return ComposeTS(physical+msecs, logical)
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}
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// NewTSOKVBase returns a etcdkv.EtcdKV object
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func NewTSOKVBase(client *clientv3.Client, tsoRoot, subPath string) *etcdkv.EtcdKV {
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return etcdkv.NewEtcdKV(client, path.Join(tsoRoot, subPath))
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}
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