github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/worker/hub.go (about)

     1  // Copyright 2019 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 worker
    15  
    16  var conditionHub *ConditionHub
    17  
    18  // ConditionHub holds a DM-worker and it is used for wait condition detection.
    19  type ConditionHub struct {
    20  	w *SourceWorker
    21  }
    22  
    23  // InitConditionHub inits the singleton instance of ConditionHub.
    24  func InitConditionHub(w *SourceWorker) {
    25  	conditionHub = &ConditionHub{
    26  		w: w,
    27  	}
    28  }
    29  
    30  // GetConditionHub returns singleton instance of ConditionHub.
    31  func GetConditionHub() *ConditionHub {
    32  	return conditionHub
    33  }