github.com/uber/kraken@v0.1.4/lib/hashring/passive_ring.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, 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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package hashring
    15  
    16   import (
    17  	"github.com/uber/kraken/lib/healthcheck"
    18  	"github.com/uber/kraken/lib/hostlist"
    19  )
    20  
    21   // PassiveRing is a wrapper around Ring which supports passive health checks.
    22  // See healthcheck.PassiveFilter for passive health check documentation.
    23  type PassiveRing interface {
    24  	Ring
    25  	Failed(addr string)
    26  }
    27  
    28   type passiveRing struct {
    29  	Ring
    30  	passiveFilter healthcheck.PassiveFilter
    31  }
    32  
    33   // NewPassive creats a new PassiveRing.
    34  func NewPassive(
    35  	config Config,
    36  	cluster hostlist.List,
    37  	passiveFilter healthcheck.PassiveFilter,
    38  	opts ...Option) PassiveRing {
    39  
    40   	return &passiveRing{
    41  		New(config, cluster, passiveFilter, opts...),
    42  		passiveFilter,
    43  	}
    44  }
    45  
    46   // Failed marks a request to addr as failed.
    47  func (p *passiveRing) Failed(addr string) {
    48  	p.passiveFilter.Failed(addr)
    49  }