Merge branch '6-subscribe-for-cache-events' into 'main'

Subscribe for Cache events

Closes #6

See merge request eclipse/xfsc/tsa/task!11

cmd/task/main.go

@@ -32,6 +32,7 @@ import (
 	goatask "gitlab.eclipse.org/eclipse/xfsc/tsa/task/gen/task"
 	goatasklist "gitlab.eclipse.org/eclipse/xfsc/tsa/task/gen/task_list"
 	"gitlab.eclipse.org/eclipse/xfsc/tsa/task/internal/clients/cache"
+	"gitlab.eclipse.org/eclipse/xfsc/tsa/task/internal/clients/event"
 	"gitlab.eclipse.org/eclipse/xfsc/tsa/task/internal/clients/policy"
 	"gitlab.eclipse.org/eclipse/xfsc/tsa/task/internal/config"
 	"gitlab.eclipse.org/eclipse/xfsc/tsa/task/internal/executor"
@@ -91,6 +92,17 @@ func main() {
 	// create cache client
 	cache := cache.New(cfg.Cache.Addr, cache.WithHTTPClient(oauthClient))
 
+	var events *event.Client
+	if cfg.Nats.Addr != "" {
+		events, err = event.New(cfg.Nats.Addr, cfg.Nats.Subject)
+		if err != nil {
+			logger.Fatal("failed to create events client", zap.Error(err))
+		}
+		defer events.Close(context.Background()) //nolint:errcheck
+	} else {
+		logger.Info("task service is not able to subscribe for cache events")
+	}
+
 	// create task executor
 	executor := executor.New(
 		storage,
@@ -213,6 +225,11 @@ func main() {
 	g.Go(func() error {
 		return listExecutor.Start(ctx)
 	})
+	if events != nil {
+		g.Go(func() error {
+			return events.Start(ctx)
+		})
+	}
 	if err := g.Wait(); err != nil {
 		logger.Error("run group stopped", zap.Error(err))
 	}

go.mod

@@ -4,6 +4,8 @@ go 1.21
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
+	github.com/cloudevents/sdk-go/protocol/nats/v2 v2.14.0
+	github.com/cloudevents/sdk-go/v2 v2.14.0
 	github.com/google/uuid v1.3.0
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/prometheus/client_golang v1.16.0
@@ -28,6 +30,7 @@ require (
 	github.com/golang/snappy v0.0.1 // indirect
 	github.com/gopherjs/gopherjs v0.0.0-20220221023154-0b2280d3ff96 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/jtolds/gls v4.20.0+incompatible // indirect
 	github.com/klauspost/compress v1.13.6 // indirect
 	github.com/lestrrat-go/blackmagic v1.0.1 // indirect
@@ -38,7 +41,14 @@ require (
 	github.com/lestrrat-go/option v1.0.1 // indirect
 	github.com/manveru/faker v0.0.0-20171103152722-9fbc68a78c4d // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/minio/highwayhash v1.0.2 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe // indirect
+	github.com/nats-io/jwt/v2 v2.5.3 // indirect
+	github.com/nats-io/nats.go v1.13.1-0.20220308171302-2f2f6968e98d // indirect
+	github.com/nats-io/nkeys v0.4.6 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.3.0 // indirect
 	github.com/prometheus/common v0.42.0 // indirect
@@ -53,11 +63,11 @@ require (
 	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
 	github.com/zach-klippenstein/goregen v0.0.0-20160303162051-795b5e3961ea // indirect
 	go.uber.org/multierr v1.10.0 // indirect
-	golang.org/x/crypto v0.12.0 // indirect
+	golang.org/x/crypto v0.14.0 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/net v0.14.0 // indirect
-	golang.org/x/sys v0.11.0 // indirect
-	golang.org/x/text v0.12.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/tools v0.11.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect

go.sum

@@ -6,6 +6,10 @@ github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqy
 github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cloudevents/sdk-go/protocol/nats/v2 v2.14.0 h1:cPOXwhwRb+RtHrPSs6Qmobgt4q/0e4wNBdfUjOeV9Qw=
+github.com/cloudevents/sdk-go/protocol/nats/v2 v2.14.0/go.mod h1:BQefJHVdyw9MqEG5EdualOQ/JgYMViAEzkSbAp6qCKA=
+github.com/cloudevents/sdk-go/v2 v2.14.0 h1:Nrob4FwVgi5L4tV9lhjzZcjYqFVyJzsA56CwPaPfv6s=
+github.com/cloudevents/sdk-go/v2 v2.14.0/go.mod h1:xDmKfzNjM8gBvjaF8ijFjM1VYOVUEeUfapHMUX1T5To=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -30,6 +34,7 @@ github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gxui v0.0.0-20151028112939-f85e0a97b3a4 h1:OL2d27ueTKnlQJoqLW2fc9pWYulFnJYLWzomGV7HqZo=
 github.com/google/gxui v0.0.0-20151028112939-f85e0a97b3a4/go.mod h1:Pw1H1OjSNHiqeuxAduB1BKYXIwFtsyrY47nEqSgEiCM=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
@@ -38,6 +43,8 @@ github.com/gopherjs/gopherjs v0.0.0-20220221023154-0b2280d3ff96 h1:QJq7UBOuoynsy
 github.com/gopherjs/gopherjs v0.0.0-20220221023154-0b2280d3ff96/go.mod h1:pRRIvn/QzFLrKfvEz3qUuEhtE/zLCWfreZ6J5gM2i+k=
 github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
 github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
@@ -70,8 +77,26 @@ github.com/manveru/gobdd v0.0.0-20131210092515-f1a17fdd710b h1:3E44bLeN8uKYdfQqV
 github.com/manveru/gobdd v0.0.0-20131210092515-f1a17fdd710b/go.mod h1:Bj8LjjP0ReT1eKt5QlKjwgi5AFm5mI6O1A2G4ChI0Ag=
 github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
 github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
+github.com/minio/highwayhash v1.0.2 h1:Aak5U0nElisjDCfPSG79Tgzkn2gl66NxOMspRrKnA/g=
+github.com/minio/highwayhash v1.0.2/go.mod h1:BQskDq+xkJ12lmlUUi7U0M5Swg3EWR+dLTk+kldvVxY=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
+github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe h1:iruDEfMl2E6fbMZ9s0scYfZQ84/6SPL6zC8ACM2oIL0=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
+github.com/nats-io/jwt/v2 v2.5.3 h1:/9SWvzc6hTfamcgXJ3uYRpgj+QuY2aLNqRiqrKcrpEo=
+github.com/nats-io/jwt/v2 v2.5.3/go.mod h1:iysuPemFcc7p4IoYots3IuELSI4EDe9Y0bQMe+I3Bf4=
+github.com/nats-io/nats-server/v2 v2.7.4 h1:c+BZJ3rGzUKCBIM4IXO8uNT2u1vajGbD1kPA6wqCEaM=
+github.com/nats-io/nats-server/v2 v2.7.4/go.mod h1:1vZ2Nijh8tcyNe8BDVyTviCd9NYzRbubQYiEHsvOQWc=
+github.com/nats-io/nats.go v1.13.1-0.20220308171302-2f2f6968e98d h1:zJf4l8Kp67RIZhoVeniSLZs69SHNgjLHz0aNsqPPlx8=
+github.com/nats-io/nats.go v1.13.1-0.20220308171302-2f2f6968e98d/go.mod h1:BPko4oXsySz4aSWeFgOHLZs3G4Jq4ZAyE6/zMCxRT6w=
+github.com/nats-io/nkeys v0.3.0/go.mod h1:gvUNGjVcM2IPr5rCsRsC6Wb3Hr2CQAm08dsxtV6A5y4=
+github.com/nats-io/nkeys v0.4.6 h1:IzVe95ru2CT6ta874rt9saQRkWfe2nFj1NtvYSLqMzY=
+github.com/nats-io/nkeys v0.4.6/go.mod h1:4DxZNzenSVd1cYQoAa8948QY3QDjrHfcfVADymtkpts=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
@@ -95,12 +120,15 @@ github.com/smartystreets/goconvey v1.7.2/go.mod h1:Vw0tHAZW6lzCRk3xgdin6fKYcG+G3
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/xdg-go/pbkdf2 v1.0.0 h1:Su7DPu48wXMwC3bs7MCNG+z4FhcyEuz5dlvchbq0B0c=
 github.com/xdg-go/pbkdf2 v1.0.0/go.mod h1:jrpuAogTd400dnrH08LKmI/xc1MbPOebTwRqcT5RDeI=
 github.com/xdg-go/scram v1.1.2 h1:FHX5I5B4i4hKRVRBCFRxq1iQRej7WO3hhBuJf+UUySY=
@@ -125,11 +153,12 @@ go.uber.org/zap v1.25.0/go.mod h1:JIAUzQIH94IC4fOJQm7gMmBJP5k7wQfdcnYdPoEXJYk=
 goa.design/goa/v3 v3.12.3 h1:LHQDUp7t67Ml8pyQc1ywSa14eQ3JaTUBESMgOKF19bI=
 goa.design/goa/v3 v3.12.3/go.mod h1:y78cWNxip293j/ut0fvu8FH+s61ojHKyLbTQumk+BB4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.9.0/go.mod h1:yrmDGqONDYtNj3tH8X9dzUun2m2lzPa9ngI6/RUPGR0=
-golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
-golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
+golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
@@ -151,6 +180,7 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
 golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sys v0.0.0-20190130150945-aca44879d564/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -160,8 +190,8 @@ golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -174,8 +204,10 @@ golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.12.0 h1:k+n5B8goJNdU7hSvEtMUz3d1Q6D/XW4COJSJR6fN0mc=
-golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac h1:7zkz7BUtwNFFqcowJ+RIgu2MaV/MapERkDIy+mwPyjs=
+golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=

internal/clients/event/client.go

+package event
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/cloudevents/sdk-go/protocol/nats/v2"
+	cloudevents "github.com/cloudevents/sdk-go/v2"
+)
+
+type Client struct {
+	consumer *nats.Consumer
+	events   cloudevents.Client
+}
+
+func New(addr, subject string) (*Client, error) {
+	// create cloudevents NATS consumer
+	// other protocol implementations: https://github.com/cloudevents/sdk-go/tree/main/protocol
+	c, err := nats.NewConsumer(addr, subject, nats.NatsOptions())
+	if err != nil {
+		return nil, err
+	}
+
+	e, err := cloudevents.NewClient(c)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Client{
+		consumer: c,
+		events:   e,
+	}, nil
+}
+
+func (c *Client) Start(ctx context.Context) error {
+	return c.events.StartReceiver(ctx, handler)
+}
+
+func (c *Client) Close(ctx context.Context) error {
+	return c.consumer.Close(ctx)
+}
+
+// handler is an example implementation.
+// Implementation will be done in https://gitlab.eclipse.org/eclipse/xfsc/tsa/task/-/issues/7
+func handler(_ context.Context, event cloudevents.Event) error {
+	fmt.Printf("Got Event Context: %+v\n", event.Context)
+
+	var data map[string]interface{}
+	if err := json.Unmarshal(event.Data(), &data); err != nil {
+		fmt.Printf("Got Data Error: %s\n", err.Error())
+	}
+	fmt.Printf("Got Data: %+v\n", data)
+
+	return nil
+}

internal/config/config.go

@@ -12,6 +12,7 @@ type Config struct {
 	Cache        cacheConfig
 	Metrics      metricsConfig
 	OAuth        oauthConfig
+	Nats         natsConfig
 
 	LogLevel string `envconfig:"LOG_LEVEL" default:"INFO"`
 }
@@ -64,3 +65,8 @@ type oauthConfig struct {
 	ClientSecret string `envconfig:"OAUTH_CLIENT_SECRET"`
 	TokenURL     string `envconfig:"OAUTH_TOKEN_URL"`
 }
+
+type natsConfig struct {
+	Addr    string `envconfig:"NATS_ADDR"`
+	Subject string `envconfig:"NATS_SUBJECT" default:"external"`
+}