github.com/erda-project/erda-infra@v1.0.9/providers/kafkav2/kafka.go (about)

     1  // Copyright (c) 2021 Terminus, 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  
    15  package kafkav2
    16  
    17  import (
    18  	"reflect"
    19  
    20  	"github.com/erda-project/erda-infra/base/logs"
    21  	"github.com/erda-project/erda-infra/base/servicehub"
    22  	writer "github.com/erda-project/erda-infra/pkg/parallel-writer"
    23  )
    24  
    25  // Interface .
    26  type Interface interface {
    27  	NewProducer(c ProducerConfig, options ...ProducerOption) (writer.Writer, error)
    28  	Servers() string
    29  }
    30  
    31  // Producer .
    32  type Producer interface {
    33  	writer.Writer
    34  }
    35  
    36  type config struct {
    37  	Servers string `file:"servers" env:"BOOTSTRAP_SERVERS" default:"localhost:9092" desc:"kafka servers"`
    38  }
    39  
    40  // provider .
    41  type provider struct {
    42  	Cfg *config
    43  	Log logs.Logger
    44  }
    45  
    46  // Init .
    47  func (p *provider) Init(ctx servicehub.Context) error {
    48  	return nil
    49  }
    50  
    51  // Provide .
    52  func (p *provider) Provide(ctx servicehub.DependencyContext, options ...interface{}) interface{} {
    53  	return &service{
    54  		p:    p,
    55  		log:  p.Log.Sub(ctx.Caller()),
    56  		name: ctx.Caller(),
    57  	}
    58  }
    59  
    60  type service struct {
    61  	p    *provider
    62  	log  logs.Logger
    63  	name string
    64  }
    65  
    66  var _ Interface = (*service)(nil)
    67  
    68  func (s *service) Servers() string { return s.p.Cfg.Servers }
    69  
    70  func init() {
    71  	servicehub.Register("kafka-v2", &servicehub.Spec{
    72  		Services: []string{"kafka-v2", "kafka-producer-v2"},
    73  		Types: []reflect.Type{
    74  			reflect.TypeOf((*Interface)(nil)).Elem(),
    75  		},
    76  		ConfigFunc: func() interface{} { return &config{} },
    77  		Creator: func() servicehub.Provider {
    78  			return &provider{}
    79  		},
    80  	})
    81  }