github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/cdc/sink/dispatcher/default.go (about)

     1  // Copyright 2020 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 dispatcher
    15  
    16  import (
    17  	"github.com/pingcap/ticdc/cdc/model"
    18  )
    19  
    20  type defaultDispatcher struct {
    21  	partitionNum   int32
    22  	tbd            *tableDispatcher
    23  	ivd            *indexValueDispatcher
    24  	enableOldValue bool
    25  }
    26  
    27  func newDefaultDispatcher(partitionNum int32, enableOldValue bool) *defaultDispatcher {
    28  	return &defaultDispatcher{
    29  		partitionNum:   partitionNum,
    30  		tbd:            newTableDispatcher(partitionNum),
    31  		ivd:            newIndexValueDispatcher(partitionNum),
    32  		enableOldValue: enableOldValue,
    33  	}
    34  }
    35  
    36  func (d *defaultDispatcher) Dispatch(row *model.RowChangedEvent) int32 {
    37  	if d.enableOldValue {
    38  		return d.tbd.Dispatch(row)
    39  	}
    40  	if len(row.IndexColumns) != 1 {
    41  		return d.tbd.Dispatch(row)
    42  	}
    43  	return d.ivd.Dispatch(row)
    44  }