/
publisherserver.go
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/
publisherserver.go
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package web
import (
"context"
"github.com/opentracing/opentracing-go"
"github.com/razorpay/metro/internal/brokerstore"
"github.com/razorpay/metro/internal/credentials"
"github.com/razorpay/metro/internal/merror"
"github.com/razorpay/metro/internal/project"
"github.com/razorpay/metro/internal/publisher"
"github.com/razorpay/metro/internal/tasks"
"github.com/razorpay/metro/internal/topic"
"github.com/razorpay/metro/pkg/logger"
metrov1 "github.com/razorpay/metro/rpc/proto/v1"
"google.golang.org/protobuf/types/known/emptypb"
)
type publisherServer struct {
projectCore project.ICore
brokerStore brokerstore.IBrokerStore
topicCore topic.ICore
credentialsCore credentials.ICore
publisher publisher.IPublisher
}
func newPublisherServer(projectCore project.ICore, brokerStore brokerstore.IBrokerStore, topicCore topic.ICore, credentialsCore credentials.ICore, publisher publisher.IPublisher) *publisherServer {
return &publisherServer{projectCore: projectCore, brokerStore: brokerStore, topicCore: topicCore, credentialsCore: credentialsCore, publisher: publisher}
}
// Produce messages to a topic
func (s publisherServer) Publish(ctx context.Context, req *metrov1.PublishRequest) (*metrov1.PublishResponse, error) {
logger.Ctx(ctx).Infow("PublishServer: produce request received", "req", req.Topic)
span, ctx := opentracing.StartSpanFromContext(
ctx,
"PublisherServer.Publish",
opentracing.Tags{
"topic": req.Topic,
})
defer span.Finish()
// Check if topic exists in the PublisherTask Cache
if tasks.CheckIfTopicExists(ctx, req.Topic) {
topicCacheCount.WithLabelValues(env, "Hit", req.Topic).Inc()
} else {
topicCacheCount.WithLabelValues(env, "Miss", req.Topic).Inc()
logger.Ctx(ctx).Infow(
"PublishServer: Topic doesn't exist inside the cache..",
"req",
req.Topic)
// Fallback method to check topic existence in the Registry
ok, err := s.topicCore.ExistsWithName(ctx, req.Topic)
if err != nil {
return nil, merror.ToGRPCError(err)
}
if !ok {
return nil, merror.New(
merror.NotFound,
"topic not found").ToGRPCError()
}
// Update Topic cache with Fallback
topicMap := make(map[string]bool)
topicMap[req.Topic] = true
tasks.UpdateTopicCache(ctx, topicMap, true)
}
if err := publisher.ValidatePublishRequest(ctx, req); err != nil {
return nil, merror.ToGRPCError(err)
}
msgIDs, err := s.publisher.Publish(ctx, req)
if err != nil {
return nil, merror.ToGRPCError(err)
}
logger.Ctx(ctx).Infow("produce request completed", "req", req.Topic, "message_ids", msgIDs)
return &metrov1.PublishResponse{MessageIds: msgIDs}, nil
}
// CreateTopic creates a new topic
func (s publisherServer) CreateTopic(ctx context.Context, req *metrov1.Topic) (*metrov1.Topic, error) {
span, ctx := opentracing.StartSpanFromContext(ctx, "PublisherServer.CreateTopic", opentracing.Tags{
"topic": req.Name,
})
defer span.Finish()
logger.Ctx(ctx).Infow("received request to create topic", "name", req.Name)
m, err := topic.GetValidatedModel(ctx, req)
if err != nil {
return nil, merror.ToGRPCError(err)
}
err = s.topicCore.CreateTopic(ctx, m)
if err != nil {
return nil, merror.ToGRPCError(err)
}
return req, nil
}
// Delete a topic
func (s publisherServer) DeleteTopic(ctx context.Context, req *metrov1.DeleteTopicRequest) (*emptypb.Empty, error) {
logger.Ctx(ctx).Infow("received request to delete topic", "name", req.Topic)
span, ctx := opentracing.StartSpanFromContext(ctx, "PublisherServer.DeleteTopic", opentracing.Tags{
"topic": req.Topic,
})
defer span.Finish()
// Delete topic but not the subscriptions for it
// the subscriptions would get tagged to _deleted_topic_
m, err := topic.GetValidatedModel(ctx, &metrov1.Topic{Name: req.Topic})
if err != nil {
return nil, merror.ToGRPCError(err)
}
err = s.topicCore.DeleteTopic(ctx, m)
if err != nil {
return nil, merror.ToGRPCError(err)
}
return &emptypb.Empty{}, nil
}
func (s publisherServer) ListProjectTopics(ctx context.Context,
req *metrov1.ListProjectTopicsRequest) (*metrov1.ListProjectTopicsResponse, error) {
logger.Ctx(ctx).Infow("publisherServer: received request to list project topics", "project_id", req.ProjectId)
span, ctx := opentracing.StartSpanFromContext(ctx, "PublisherServer.ListProjectTopics", opentracing.Tags{
"project": req.ProjectId,
})
defer span.Finish()
topics, err := s.topicCore.List(ctx, topic.Prefix+req.ProjectId)
if err != nil {
return nil, merror.ToGRPCError(err)
}
res := []string{}
for _, t := range topics {
if t.IsPrimaryTopic() {
res = append(res, t.ExtractedTopicName)
}
}
return &metrov1.ListProjectTopicsResponse{Topics: res}, nil
}
//AuthFuncOverride - Override function called by the auth interceptor
func (s publisherServer) AuthFuncOverride(ctx context.Context, fullMethodName string, req interface{}) (context.Context, error) {
return authRequest(ctx, s.credentialsCore, fullMethodName, req)
}