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processor_factory.go
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/
processor_factory.go
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package consumer
import (
"github.com/Clymene-project/Clymene/cmd/ingester/app/consumer/offset"
"github.com/Clymene-project/Clymene/cmd/ingester/app/processor"
"github.com/Clymene-project/Clymene/cmd/ingester/app/processor/decorator"
"github.com/Clymene-project/Clymene/pkg/kafka/consumer"
"io"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
)
// ProcessorFactoryParams are the parameters of a ProcessorFactory
type ProcessorFactoryParams struct {
Parallelism int
Topic string
BaseProcessor processor.MetricProcessor
SaramaConsumer consumer.Consumer
Factory metrics.Factory
Logger *zap.Logger
RetryOptions []decorator.RetryOption
}
// ProcessorFactory is a factory for creating startedProcessors
type ProcessorFactory struct {
topic string
consumer consumer.Consumer
metricsFactory metrics.Factory
logger *zap.Logger
baseProcessor processor.MetricProcessor
parallelism int
retryOptions []decorator.RetryOption
}
// NewProcessorFactory constructs a new ProcessorFactory
func NewProcessorFactory(params ProcessorFactoryParams) (*ProcessorFactory, error) {
return &ProcessorFactory{
topic: params.Topic,
consumer: params.SaramaConsumer,
metricsFactory: params.Factory,
logger: params.Logger,
baseProcessor: params.BaseProcessor,
parallelism: params.Parallelism,
retryOptions: params.RetryOptions,
}, nil
}
func (c *ProcessorFactory) new(partition int32, minOffset int64) processor.MetricProcessor {
c.logger.Info("Creating new processors", zap.Int32("partition", partition))
markOffset := func(offset int64) {
c.consumer.MarkPartitionOffset(c.topic, partition, offset, "")
}
om := offset.NewManager(minOffset, markOffset, partition, c.metricsFactory)
retryProcessor := decorator.NewRetryingProcessor(c.metricsFactory, c.baseProcessor, c.retryOptions...)
cp := NewCommittingProcessor(retryProcessor, om)
metricProcessor := processor.NewDecoratedProcessor(c.metricsFactory, cp)
pp := processor.NewParallelProcessor(metricProcessor, c.parallelism, c.logger)
return newStartedProcessor(pp, om)
}
type service interface {
Start()
io.Closer
}
type startProcessor interface {
Start()
processor.MetricProcessor
}
type startedProcessor struct {
services []service
processor startProcessor
}
func newStartedProcessor(parallelProcessor startProcessor, services ...service) processor.MetricProcessor {
s := &startedProcessor{
services: services,
processor: parallelProcessor,
}
for _, service := range services {
service.Start()
}
s.processor.Start()
return s
}
func (c *startedProcessor) Process(message processor.Message) error {
return c.processor.Process(message)
}
func (c *startedProcessor) Close() error {
c.processor.Close()
for _, service := range c.services {
service.Close()
}
return nil
}