/
consumer.go
168 lines (137 loc) · 5.01 KB
/
consumer.go
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package proposal
import (
"context"
"fmt"
"time"
pevents "github.com/goverland-labs/goverland-platform-events/events/aggregator"
coreevents "github.com/goverland-labs/goverland-platform-events/events/core"
client "github.com/goverland-labs/goverland-platform-events/pkg/natsclient"
"github.com/nats-io/nats.go"
"github.com/rs/zerolog/log"
"github.com/goverland-labs/goverland-core-storage/internal/config"
"github.com/goverland-labs/goverland-core-storage/internal/metrics"
)
const (
groupName = "proposal"
maxPendingAckPerConsumer = 10
)
type closable interface {
Close() error
}
type Consumer struct {
conn *nats.Conn
service *Service
consumers []closable
}
func NewConsumer(nc *nats.Conn, s *Service) (*Consumer, error) {
c := &Consumer{
conn: nc,
service: s,
consumers: make([]closable, 0),
}
return c, nil
}
func (c *Consumer) handler() pevents.ProposalHandler {
return func(payload pevents.ProposalPayload) error {
var err error
defer func(start time.Time) {
metricHandleHistogram.
WithLabelValues("handle_proposal", metrics.ErrLabelValue(err)).
Observe(time.Since(start).Seconds())
}(time.Now())
err = c.service.HandleProposal(context.TODO(), convertToProposal(payload))
if err != nil {
log.Error().Err(err).Msg("process proposal")
}
log.Debug().Msgf("proposal was processed: %s", payload.ID)
return err
}
}
func (c *Consumer) handleDeleted() pevents.ProposalHandler {
return func(payload pevents.ProposalPayload) error {
var err error
defer func(start time.Time) {
metricHandleHistogram.
WithLabelValues("handle_deleted_proposal", metrics.ErrLabelValue(err)).
Observe(time.Since(start).Seconds())
}(time.Now())
err = c.service.HandleDeleted(context.TODO(), convertToProposal(payload))
if err != nil {
log.Error().Err(err).Msg("process deleted proposal")
}
log.Debug().Msgf("deleted proposal was processed: %s", payload.ID)
return err
}
}
func (c *Consumer) handlerTimeline() coreevents.TimelineHandler {
return func(payload coreevents.TimelinePayload) error {
var err error
defer func(start time.Time) {
metricHandleHistogram.
WithLabelValues("handle_timeline", metrics.ErrLabelValue(err)).
Observe(time.Since(start).Seconds())
}(time.Now())
// allow to handle only proposals
if payload.ProposalID == "" || payload.DiscussionID != "" {
return nil
}
err = c.service.HandleProposalTimeline(context.TODO(), payload.ProposalID, convertToTimeline(payload.Timeline))
if err != nil {
log.Error().Err(err).Msg("process proposal timeline")
}
log.Debug().Msgf("proposal timeline was processed: %s", payload.ProposalID)
return err
}
}
func (c *Consumer) handlerAddressResolved() coreevents.EnsNamesHandler {
return func(payload coreevents.EnsNamesPayload) error {
var err error
defer func(start time.Time) {
metricHandleHistogram.
WithLabelValues("handle_address_resolved", metrics.ErrLabelValue(err)).
Observe(time.Since(start).Seconds())
}(time.Now())
err = c.service.HandleResolvedAddresses(context.TODO(), convertToResolvedAddresses(payload))
if err != nil {
log.Error().Err(err).Msg("process address resolved")
}
log.Debug().Msgf("proposal resolved addresses were processed")
return err
}
}
func (c *Consumer) Start(ctx context.Context) error {
group := config.GenerateGroupName(groupName)
cc, err := client.NewConsumer(ctx, c.conn, group, pevents.SubjectProposalCreated, c.handler(), client.WithMaxAckPending(maxPendingAckPerConsumer))
if err != nil {
return fmt.Errorf("consume for %s/%s: %w", group, pevents.SubjectProposalCreated, err)
}
cu, err := client.NewConsumer(ctx, c.conn, group, pevents.SubjectProposalUpdated, c.handler(), client.WithMaxAckPending(maxPendingAckPerConsumer))
if err != nil {
return fmt.Errorf("consume for %s/%s: %w", group, pevents.SubjectProposalUpdated, err)
}
cd, err := client.NewConsumer(ctx, c.conn, group, pevents.SubjectProposalDeleted, c.handleDeleted(), client.WithMaxAckPending(maxPendingAckPerConsumer))
if err != nil {
return fmt.Errorf("consume for %s/%s: %w", group, pevents.SubjectProposalUpdated, err)
}
ct, err := client.NewConsumer(ctx, c.conn, group, coreevents.SubjectTimelineUpdate, c.handlerTimeline(), client.WithMaxAckPending(maxPendingAckPerConsumer))
if err != nil {
return fmt.Errorf("consume for %s/%s: %w", group, pevents.SubjectProposalUpdated, err)
}
cer, err := client.NewConsumer(ctx, c.conn, group, coreevents.SubjectEnsResolverResolved, c.handlerAddressResolved(), client.WithMaxAckPending(maxPendingAckPerConsumer))
if err != nil {
return fmt.Errorf("consume for %s/%s: %w", group, coreevents.SubjectEnsResolverResolved, err)
}
c.consumers = append(c.consumers, cc, cu, cd, ct, cer)
log.Info().Msg("proposal consumers is started")
// todo: handle correct stopping the consumer by context
<-ctx.Done()
return c.stop()
}
func (c *Consumer) stop() error {
for _, cs := range c.consumers {
if err := cs.Close(); err != nil {
log.Error().Err(err).Msg("cant close proposal consumer")
}
}
return nil
}