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producer.go
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producer.go
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package nsq
import (
"context"
"github.com/alexfalkowski/go-service/transport/nsq/breaker"
"github.com/alexfalkowski/go-service/transport/nsq/logger"
lzap "github.com/alexfalkowski/go-service/transport/nsq/logger/zap"
"github.com/alexfalkowski/go-service/transport/nsq/marshaller"
"github.com/alexfalkowski/go-service/transport/nsq/message"
"github.com/alexfalkowski/go-service/transport/nsq/meta"
"github.com/alexfalkowski/go-service/transport/nsq/metrics/prometheus"
"github.com/alexfalkowski/go-service/transport/nsq/producer"
"github.com/alexfalkowski/go-service/transport/nsq/retry"
"github.com/alexfalkowski/go-service/transport/nsq/trace/opentracing"
"github.com/nsqio/go-nsq"
otr "github.com/opentracing/opentracing-go"
"go.uber.org/fx"
"go.uber.org/zap"
)
// ProducerOption for NSQ.
type ProducerOption interface{ apply(*producerOptions) }
type producerOptions struct {
logger *zap.Logger
tracer opentracing.Tracer
metrics *prometheus.ProducerMetrics
retry bool
breaker bool
}
type producerOptionFunc func(*producerOptions)
func (f producerOptionFunc) apply(o *producerOptions) { f(o) }
// WithProducerRetry for NSQ.
func WithProducerRetry() ProducerOption {
return producerOptionFunc(func(o *producerOptions) {
o.retry = true
})
}
// WithProducerBreaker for NSQ.
func WithProducerBreaker() ProducerOption {
return producerOptionFunc(func(o *producerOptions) {
o.breaker = true
})
}
// WithProducerLogger for NSQ.
func WithProducerLogger(logger *zap.Logger) ProducerOption {
return producerOptionFunc(func(o *producerOptions) {
o.logger = logger
})
}
// WithProducerConfig for NSQ.
func WithProducerTracer(tracer opentracing.Tracer) ProducerOption {
return producerOptionFunc(func(o *producerOptions) {
o.tracer = tracer
})
}
// WithProducerMetrics for NSQ.
func WithProducerMetrics(metrics *prometheus.ProducerMetrics) ProducerOption {
return producerOptionFunc(func(o *producerOptions) {
o.metrics = metrics
})
}
// ProducerParams for NSQ.
type ProducerParams struct {
Lifecycle fx.Lifecycle
Config *Config
Marshaller marshaller.Marshaller
}
// NewProducer for NSQ.
func NewProducer(params ProducerParams, opts ...ProducerOption) producer.Producer {
defaultOptions := &producerOptions{tracer: otr.NoopTracer{}}
for _, o := range opts {
o.apply(defaultOptions)
}
cfg := nsq.NewConfig()
p, _ := nsq.NewProducer(params.Config.Host, cfg)
p.SetLogger(logger.NewLogger(), nsq.LogLevelInfo)
params.Lifecycle.Append(fx.Hook{
OnStop: func(context.Context) error {
p.Stop()
return nil
},
})
var pr producer.Producer = &nsqProducer{marshaller: params.Marshaller, Producer: p}
if defaultOptions.logger != nil {
pr = lzap.NewProducer(lzap.ProducerParams{Logger: defaultOptions.logger, Producer: pr})
}
if defaultOptions.metrics != nil {
pr = defaultOptions.metrics.Producer(pr)
}
pr = opentracing.NewProducer(defaultOptions.tracer, pr)
if defaultOptions.retry {
pr = retry.NewProducer(¶ms.Config.Retry, pr)
}
if defaultOptions.breaker {
pr = breaker.NewProducer(pr)
}
pr = meta.NewProducer(params.Config.UserAgent, pr)
return pr
}
type nsqProducer struct {
marshaller marshaller.Marshaller
*nsq.Producer
}
// Publish a message to a topic.
func (p *nsqProducer) Publish(ctx context.Context, topic string, msg *message.Message) error {
bytes, err := p.marshaller.Marshal(msg)
if err != nil {
return err
}
return p.Producer.Publish(topic, bytes)
}