milvus/internal/proxy/timestamp.go

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// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
package proxy
import (
"context"
"fmt"
"time"
"github.com/milvus-io/milvus/internal/proto/commonpb"
"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
)
type timestampAllocator struct {
ctx context.Context
tso timestampAllocatorInterface
peerID UniqueID
}
// newTimestampAllocator creates a new timestampAllocator
func newTimestampAllocator(ctx context.Context, tso timestampAllocatorInterface, peerID UniqueID) (*timestampAllocator, error) {
a := &timestampAllocator{
ctx: ctx,
peerID: peerID,
tso: tso,
}
return a, nil
}
func (ta *timestampAllocator) alloc(count uint32) ([]Timestamp, error) {
ctx, cancel := context.WithTimeout(ta.ctx, 5*time.Second)
req := &rootcoordpb.AllocTimestampRequest{
Base: &commonpb.MsgBase{
MsgType: commonpb.MsgType_RequestTSO,
MsgID: 0,
Timestamp: 0,
SourceID: ta.peerID,
},
Count: count,
}
resp, err := ta.tso.AllocTimestamp(ctx, req)
defer cancel()
if err != nil {
return nil, fmt.Errorf("syncTimestamp Failed:%w", err)
}
if resp.Status.ErrorCode != commonpb.ErrorCode_Success {
return nil, fmt.Errorf("syncTimeStamp Failed:%s", resp.Status.Reason)
}
start, cnt := resp.Timestamp, resp.Count
var ret []Timestamp
for i := uint32(0); i < cnt; i++ {
ret = append(ret, start+uint64(i))
}
return ret, nil
}
func (ta *timestampAllocator) AllocOne() (Timestamp, error) {
ret, err := ta.alloc(1)
if err != nil {
return 0, err
}
return ret[0], nil
}