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publisher.go
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publisher.go
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package publisher
import (
"encoding/json"
"fmt"
"code.cloudfoundry.org/lager"
"github.com/apihub/apihub"
"github.com/hashicorp/consul/api"
)
type Publisher struct {
client *api.Client
}
func NewPublisher(client *api.Client) *Publisher {
return &Publisher{
client: client,
}
}
func (p *Publisher) Publish(logger lager.Logger, prefix string, serviceSpec apihub.ServiceSpec) error {
log := logger.Session("publisher-publish")
log.Debug("start")
defer log.Debug("end")
log.Info("publish", lager.Data{"serviceSpec": serviceSpec})
spec, err := json.Marshal(serviceSpec)
if err != nil {
log.Error("failed-to-marshal-service-data", err)
return err
}
kvp := &api.KVPair{Key: fmt.Sprintf("%s%s", apihub.SERVICES_PREFIX, serviceSpec.Host), Value: spec}
_, err = p.client.KV().Put(kvp, nil)
log.Info("published")
return err
}
func (p *Publisher) Unpublish(logger lager.Logger, prefix string, host string) error {
log := logger.Session("publisher-unpublish")
log.Debug("start")
defer log.Debug("end")
log.Info("unpublish", lager.Data{"host": host})
spec := apihub.ServiceSpec{
Host: host,
Disabled: true,
}
serviceSpec, err := json.Marshal(spec)
if err != nil {
log.Error("failed-to-marshal-service-data", err)
return err
}
key := fmt.Sprintf("%s%s", apihub.SERVICES_PREFIX, spec.Host)
kvp := &api.KVPair{Key: key, Value: serviceSpec}
_, err = p.client.KV().Put(kvp, nil)
if err != nil {
log.Error("failed-to-unpublish-service", err)
return err
}
_, err = p.client.KV().Delete(key, nil)
log.Info("unpublished")
return err
}