github.com/erda-project/erda-infra@v1.0.9/providers/kafka/examples/consumer/main.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 main
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  	"os"
    21  	"time"
    22  
    23  	"github.com/erda-project/erda-infra/base/logs"
    24  	"github.com/erda-project/erda-infra/base/servicehub"
    25  	"github.com/erda-project/erda-infra/providers/kafka"
    26  )
    27  
    28  type config struct {
    29  	Input kafka.ConsumerConfig `file:"input"`
    30  }
    31  
    32  type provider struct {
    33  	Cfg   *config
    34  	Log   logs.Logger
    35  	Kafka kafka.Interface `autowired:"kafka-consumer"`
    36  }
    37  
    38  func (p *provider) Run(ctx context.Context) error {
    39  	p.Kafka.NewConsumer(&p.Cfg.Input, p.invoke)
    40  	for {
    41  		select {
    42  		case <-ctx.Done():
    43  			return nil
    44  		}
    45  	}
    46  }
    47  
    48  func (p *provider) invoke(key []byte, value []byte, topic *string, timestamp time.Time) error {
    49  	fmt.Println(string(value))
    50  	return nil
    51  }
    52  
    53  func init() {
    54  	servicehub.Register("examples", &servicehub.Spec{
    55  		Services:   []string{"hello"},
    56  		ConfigFunc: func() interface{} { return &config{} },
    57  		Creator: func() servicehub.Provider {
    58  			return &provider{}
    59  		},
    60  	})
    61  }
    62  
    63  func main() {
    64  	hub := servicehub.New()
    65  	hub.Run("examples", "", os.Args...)
    66  }