github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/cdc/sink/dmlsink/mq/dispatcher/partition/ts.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package partition
    15  
    16  import (
    17  	"fmt"
    18  
    19  	"github.com/pingcap/tiflow/cdc/model"
    20  )
    21  
    22  // TsDispatcher is a partition dispatcher which dispatch events based on ts.
    23  type TsDispatcher struct{}
    24  
    25  // NewTsDispatcher creates a TsDispatcher.
    26  func NewTsDispatcher() *TsDispatcher {
    27  	return &TsDispatcher{}
    28  }
    29  
    30  // DispatchRowChangedEvent returns the target partition to which
    31  // a row changed event should be dispatched.
    32  func (t *TsDispatcher) DispatchRowChangedEvent(row *model.RowChangedEvent, partitionNum int32) (int32, string, error) {
    33  	return int32(row.CommitTs % uint64(partitionNum)), fmt.Sprintf("%d", row.CommitTs), nil
    34  }