vitess.io/vitess@v0.16.2/go/vt/vtorc/inst/candidate_database_instance.go (about)

     1  /*
     2     Copyright 2016 Simon J Mudd
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package inst
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"vitess.io/vitess/go/vt/vtctl/reparentutil/promotionrule"
    23  	"vitess.io/vitess/go/vt/vtorc/db"
    24  )
    25  
    26  // CandidateDatabaseInstance contains information about explicit promotion rules for an instance
    27  type CandidateDatabaseInstance struct {
    28  	Hostname            string
    29  	Port                int
    30  	PromotionRule       promotionrule.CandidatePromotionRule
    31  	LastSuggestedString string
    32  	PromotionRuleExpiry string // generated when retrieved from database for consistency reasons
    33  }
    34  
    35  func NewCandidateDatabaseInstance(instanceKey *InstanceKey, promotionRule promotionrule.CandidatePromotionRule) *CandidateDatabaseInstance {
    36  	return &CandidateDatabaseInstance{
    37  		Hostname:      instanceKey.Hostname,
    38  		Port:          instanceKey.Port,
    39  		PromotionRule: promotionRule,
    40  	}
    41  }
    42  
    43  func (cdi *CandidateDatabaseInstance) WithCurrentTime() *CandidateDatabaseInstance {
    44  	cdi.LastSuggestedString, _ = db.ReadTimeNow()
    45  	return cdi
    46  }
    47  
    48  // String returns a string representation of the CandidateDatabaseInstance struct
    49  func (cdi *CandidateDatabaseInstance) String() string {
    50  	return fmt.Sprintf("%s:%d %s", cdi.Hostname, cdi.Port, cdi.PromotionRule)
    51  }
    52  
    53  // Key returns an instance key representing this candidate
    54  func (cdi *CandidateDatabaseInstance) Key() *InstanceKey {
    55  	return &InstanceKey{Hostname: cdi.Hostname, Port: cdi.Port}
    56  }