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# macOS | ||
.DS_Store | ||
|
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# If you prefer the allow list template instead of the deny list, see community template: | ||
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore | ||
# | ||
# Binaries for programs and plugins | ||
*.exe | ||
*.exe~ | ||
*.dll | ||
*.so | ||
*.dylib | ||
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# Test binary, built with `go test -c` | ||
*.test | ||
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# Output of the go coverage tool, specifically when used with LiteIDE | ||
*.out | ||
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# Dependency directories (remove the comment below to include it) | ||
# vendor/ | ||
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# Go workspace file | ||
go.work | ||
go.work.sum | ||
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# env file | ||
.env | ||
.idea |
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## Проект Kafka Avro на Go | ||
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Этот проект демонстрирует работу с Kafka и Avro на языке Go. | ||
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### Описание | ||
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Код проекта можно скомпилировать в два независимо запускаемых приложений: | ||
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* Продьюсер (Producer): Записывает данные в формате Avro в топик Kafka. | ||
* Консьюмер (Consumer): Считывает данные из топика Kafka и выводит их в консоль. | ||
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### Установка | ||
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1. Установите Go с официального сайта: https://go.dev/doc/install | ||
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2. Установите требуемые зависимости: | ||
```bash | ||
go mod tidy | ||
``` | ||
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3. Настройте конфигурационные файлы (можно оставить без изменений): | ||
* `config/имя.yaml`: файл конфигурации для подключения к Kafka и установки параметров. | ||
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### Запуск | ||
1. Запустите инфраструктуру | ||
```bash | ||
cd ./infra && docker compose up -d | ||
``` | ||
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2. Создайте топик и проверьте его конфигурацию: | ||
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```bash | ||
docker exec -it kafka-1 ../../usr/bin/kafka-topics --create --topic users --bootstrap-server kafka-1:9092 --partitions 3 --replication-factor 2 | ||
``` | ||
Параметры `localhost:9092` - адрес Kafka-брокера, `users` - имя топика, `3` - количество партиций, `2` - количество реплик. | ||
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```bash | ||
docker exec -it kafka-1 ../../usr/bin/kafka-topics --describe --topic users --bootstrap-server localhost:9092 | ||
``` | ||
Ожидаемый результат: | ||
``` | ||
Topic: users TopicId: YEE8ywCDR2mWWht0TNlZsw PartitionCount: 3 ReplicationFactor: 2 Configs: | ||
Topic: users Partition: 0 Leader: 2 Replicas: 2,1 Isr: 2,1 | ||
Topic: users Partition: 1 Leader: 1 Replicas: 1,2 Isr: 1,2 | ||
Topic: users Partition: 2 Leader: 2 Replicas: 2,1 Isr: 2,1 | ||
``` | ||
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3. Запустите Producer: | ||
```bash | ||
go run ./avro-example/cmd/main.go -c ./avro-example/config/producer.yaml | ||
``` | ||
а. Программа у вас запросит требуемое действие (Command): | ||
введите `send`, чтобы отправить сообщение в брокер | ||
введите `exit`, чтобы выйти | ||
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б. Программа у вас запросит требуемые данные для отправки - имя (Enter name:), | ||
любимое число (Enter favorite number:), любимый цвет (Enter favorite color:). Пожалуйста, | ||
заполняйте правильно вводимые значения, так как основная задача показать возможность передачи | ||
данных в формате Avro, используя Kafka, валидация данных не сделана. | ||
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Пример: | ||
``` | ||
Command:send | ||
Enter name: alex | ||
Enter favorite number: 55 | ||
Enter favorite color:black | ||
``` | ||
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4. Запустите consumer-push: | ||
```bash | ||
go run ./avro-example/cmd/main.go -c ./avro-example/config/consumer1.yaml | ||
``` | ||
5. Запустите consumer-pull: | ||
```bash | ||
go run ./avro-example/cmd/main.go -c ./avro-example/config/consumer2.yaml | ||
``` |
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run: | ||
tests: true | ||
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issues: | ||
max-same-issues: 0 | ||
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linters-settings: | ||
exhaustive: | ||
default-signifies-exhaustive: true | ||
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depguard: | ||
rules: | ||
main: | ||
deny: | ||
- pkg: "github.com/pkg/errors" | ||
desc: Should be replaced by standard lib errors package | ||
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godox: | ||
keywords: | ||
- FIXME | ||
- TODO | ||
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govet: | ||
enable-all: true | ||
disable: | ||
- fieldalignment | ||
- shadow | ||
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lll: | ||
line-length: 120 | ||
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nolintlint: | ||
allow-no-explanation: [ "lll" ] | ||
require-explanation: true | ||
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revive: | ||
severity: error | ||
rules: | ||
- name: argument-limit | ||
- name: atomic | ||
- name: bare-return | ||
- name: blank-imports | ||
- name: bool-literal-in-expr | ||
- name: comment-spacings | ||
- name: confusing-results | ||
- name: context-as-argument | ||
arguments: | ||
- allowTypesBefore: "*testing.T" # https://go-review.googlesource.com/c/lint/+/145237 | ||
- name: context-keys-type | ||
- name: datarace | ||
- name: deep-exit | ||
- name: defer | ||
- name: dot-imports | ||
- name: duplicated-imports | ||
- name: early-return | ||
- name: empty-lines | ||
- name: empty-block | ||
- name: error-naming | ||
- name: error-return | ||
- name: error-strings | ||
- name: errorf | ||
- name: exported | ||
- name: identical-branches | ||
- name: if-return | ||
- name: increment-decrement | ||
- name: indent-error-flow | ||
- name: package-comments | ||
- name: range | ||
- name: range-val-address | ||
- name: range-val-in-closure | ||
- name: receiver-naming | ||
- name: redefines-builtin-id | ||
- name: string-of-int | ||
- name: superfluous-else | ||
- name: time-equal | ||
- name: time-naming | ||
- name: unexported-return | ||
- name: unhandled-error | ||
arguments: [ "fmt.Fprint", "fmt.Printf", "fmt.Println" ] | ||
- name: unreachable-code | ||
- name: use-any | ||
- name: unused-parameter | ||
- name: var-declaration | ||
- name: var-naming | ||
- name: waitgroup-by-value | ||
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tagliatelle: | ||
# Check the struck tag name case. | ||
case: | ||
# Use the struct field name to check the name of the struct tag. | ||
# Default: false | ||
use-field-name: false | ||
rules: | ||
# Any struct tag type can be used. | ||
# Support string case: `camel`, `pascal`, `kebab`, `snake`, `upperSnake`, `goCamel`, `goPascal`, `goKebab`, `goSnake`, `upper`, `lower`, `header`. | ||
json: camel | ||
toml: snake | ||
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linters: | ||
disable-all: true | ||
enable: | ||
- asasalint | ||
- asciicheck | ||
- bidichk | ||
- bodyclose | ||
- contextcheck | ||
- depguard | ||
- durationcheck | ||
- errcheck | ||
- errchkjson | ||
- errname | ||
- exhaustive | ||
- exportloopref | ||
- ginkgolinter | ||
- goconst | ||
- gocritic | ||
- gocyclo | ||
- godot | ||
- godox | ||
- gofmt | ||
- gofumpt | ||
- goheader | ||
- goimports | ||
- gomoddirectives | ||
- gomodguard | ||
- goprintffuncname | ||
- gosec | ||
- gosimple | ||
- govet | ||
- importas | ||
- ineffassign | ||
- inamedparam | ||
- lll | ||
- makezero | ||
- misspell | ||
- musttag | ||
- nakedret | ||
- nestif | ||
- nilerr | ||
- nilnil | ||
- noctx | ||
- nolintlint | ||
- nosprintfhostport | ||
- perfsprint | ||
- prealloc | ||
- predeclared | ||
- promlinter | ||
- reassign | ||
- revive | ||
- rowserrcheck | ||
- sloglint | ||
- staticcheck | ||
- stylecheck | ||
- sqlclosecheck | ||
- tagliatelle | ||
- tenv | ||
- testableexamples | ||
- testifylint | ||
- testpackage | ||
- thelper | ||
- tparallel | ||
- typecheck | ||
- unconvert | ||
- unparam | ||
- unused | ||
- usestdlibvars | ||
- wastedassign | ||
- whitespace |
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package app | ||
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import ( | ||
"context" | ||
"errors" | ||
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"github.com/apache_kafka_course/module1/go/avro-example/app/consumer" | ||
"github.com/apache_kafka_course/module1/go/avro-example/app/producer" | ||
"github.com/apache_kafka_course/module1/go/avro-example/internal/config" | ||
"github.com/apache_kafka_course/module1/go/avro-example/internal/logger" | ||
) | ||
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var ErrWrongType = errors.New("wrong type") | ||
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type StartGetConfigStopper interface { | ||
Start(ctx context.Context) | ||
GetConfig() string | ||
Stop() | ||
} | ||
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func Fabric() (StartGetConfigStopper, error) { | ||
cfg, err := config.New() | ||
if err != nil { | ||
return nil, err | ||
} | ||
log := logger.New(cfg.Env) | ||
switch cfg.Kafka.Type { | ||
case "producer": | ||
return producer.New(cfg, log) | ||
case "consumer-push": | ||
return consumer.New(cfg, log) | ||
case "consumer-pull": | ||
return consumer.New(cfg, log) | ||
default: | ||
return nil, ErrWrongType | ||
} | ||
} |
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package consumer | ||
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import ( | ||
"context" | ||
"log/slog" | ||
"time" | ||
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consumerpull "github.com/apache_kafka_course/module1/go/avro-example/internal/broker/consumer/pull" | ||
consumerpush "github.com/apache_kafka_course/module1/go/avro-example/internal/broker/consumer/push" | ||
"github.com/apache_kafka_course/module1/go/avro-example/internal/config" | ||
) | ||
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type consumeCloser interface { | ||
Consume() error | ||
Close() error | ||
} | ||
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type App struct { | ||
ServerConsumer consumeCloser | ||
log *slog.Logger | ||
Cfg *config.Config | ||
} | ||
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func New(cfg *config.Config, log *slog.Logger) (*App, error) { | ||
if cfg.Kafka.Type == "consumer-push" { | ||
cons, err := consumerpush.New(cfg, log) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return &App{ | ||
ServerConsumer: cons, | ||
log: log, | ||
Cfg: cfg, | ||
}, nil | ||
} | ||
cons, err := consumerpull.New(cfg, log) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return &App{ | ||
ServerConsumer: cons, | ||
log: log, | ||
Cfg: cfg, | ||
}, nil | ||
} | ||
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func (a *App) Start(ctx context.Context) { | ||
a.log.Info("producer starts") | ||
for { | ||
select { | ||
case <-ctx.Done(): | ||
return | ||
default: | ||
err := a.ServerConsumer.Consume() | ||
if err != nil { | ||
a.log.Error(err.Error()) | ||
} | ||
time.Sleep(time.Second) | ||
} | ||
} | ||
} | ||
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func (a *App) Stop() { | ||
a.log.Info("close kafka client") | ||
err := a.ServerConsumer.Close() | ||
if err != nil { | ||
a.log.Error(err.Error()) | ||
} | ||
} | ||
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func (a *App) GetConfig() string { | ||
return a.Cfg.String() | ||
} |
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