Add github.com/graph-gophers/graphql-go instrumentation (#232)

* Initial splunkgraphql module layout

* Initial instrumentation

* Add error_test

* Add start to integration tests

* Test span attributes

* Rename tags.go to attribute.go

Match OTel nomenclature.

* Add changes to changelog

* Fix lint issues

.github/dependabot.yml

@@ -46,6 +46,14 @@ updates:
     directory: "/instrumentation/github.com/go-sql-driver/mysql/splunkmysql/test"
     schedule:
       interval: "daily"
+  - package-ecosystem: "gomod"
+    directory: "/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "gomod"
+    directory: "/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/test"
+    schedule:
+      interval: "daily"
   - package-ecosystem: "gomod"
     directory: "/instrumentation/github.com/jackc/pgx/splunkpgx"
     schedule:

CHANGELOG.md

@@ -46,6 +46,9 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Add the
   `github.com/signalfx/splunk-otel-go/instrumentation/github.com/go-chi/chi/splunkchi`
   instrumentation for the `github.com/go-chi/chi` package. (#227)
+- Add the
+  `github.com/signalfx/splunk-otel-go/instrumentation/graphql-gophers/graphql-go/splunkgraphql`
+  instrumentation for the `github.com/graph-gophers/graphql-go` module. (#232)
 
 ### Changed
 

README.md

@@ -104,6 +104,7 @@ Additional recommended Splunk specific instrumentations:
 - [`splunkclient-go`](./instrumentation/k8s.io/client-go/splunkclient-go)
 - [`splunkdns`](./instrumentation/github.com/miekg/dns/splunkdns)
 - [`splunkgorm`](./instrumentation/github.com/jinzhu/gorm/splunkgorm)
+- [`splunkgraphql`](./instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql)
 - [`splunkhttp`](./instrumentation/net/http/splunkhttp)
 - [`splunkkafka`](./instrumentation/github.com/confluentinc/confluent-kafka-go/kafka/splunkkafka)
 - [`splunkleveldb`](./instrumentation/github.com/syndtr/goleveldb/leveldb/splunkleveldb)

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/README.md

@@ -0,0 +1,12 @@
+# Splunk instrumentation for `github.com/graph-gophers/graphql-go`
+
+module github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql
+
+This package provides OpenTelemetry instrumentation for the
+[graphql](https://github.com/graph-gophers/graphql-go) package.
+
+## Getting Started
+
+This package provides an implementation of the `graphql.Tracer` that can be
+used to trace `graphql` operations. See [example_test.go](./example_test.go)
+for more information.

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/example_test.go

@@ -0,0 +1,51 @@
+// Copyright Splunk Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package splunkgraphql_test
+
+import (
+	"net/http"
+
+	"github.com/graph-gophers/graphql-go"
+	"github.com/graph-gophers/graphql-go/relay"
+
+	"github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql"
+)
+
+const schema = `
+	schema {
+		query: Query
+	}
+	type Query {
+		hello: String!
+	}
+`
+
+type resolver struct{}
+
+func (*resolver) Hello() string { return "Hello, world!" }
+
+func Example() {
+	tracer := graphql.Tracer(splunkgraphql.NewTracer())
+	s := graphql.MustParseSchema(schema, new(resolver), tracer)
+	http.Handle("/query", &relay.Handler{Schema: s})
+
+	/*
+		if err := http.ListenAndServe(":8080", nil); err != nil {
+			panic(err)
+		}
+
+		...
+	*/
+}

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/go.mod

@@ -0,0 +1,12 @@
+module github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql
+
+go 1.16
+
+require (
+	github.com/graph-gophers/graphql-go v1.2.0
+	github.com/signalfx/splunk-otel-go v0.0.0-00010101000000-000000000000
+	go.opentelemetry.io/otel v1.3.0
+	go.opentelemetry.io/otel/trace v1.3.0
+)
+
+replace github.com/signalfx/splunk-otel-go => ../../../../..

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/go.sum

@@ -0,0 +1,32 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.2.1 h1:DX7uPQ4WgAWfoh+NGGlbJQswnYIVvz0SRlLS3rPZQDA=
+github.com/go-logr/logr v1.2.1/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/stdr v1.2.0 h1:j4LrlVXgrbIWO83mmQUnK0Hi+YnbD+vzrE1z/EphbFE=
+github.com/go-logr/stdr v1.2.0/go.mod h1:YkVgnZu1ZjjL7xTxrfm/LLZBfkhTqSR1ydtm6jTKKwI=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/graph-gophers/graphql-go v1.2.0 h1:j3tCG0UcE+3f84OAw/4/6YQKyTr+r0yuUKtnxiu5OH4=
+github.com/graph-gophers/graphql-go v1.2.0/go.mod h1:9CQHMSxwO4MprSdzoIEobiHpoLtHm77vfxsvsIN5Vuc=
+github.com/opentracing/opentracing-go v1.1.0 h1:pWlfV3Bxv7k65HYwkikxat0+s3pV4bsqf19k25Ur8rU=
+github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
+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/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+go.opentelemetry.io/contrib/propagators/b3 v1.2.0/go.mod h1:kO8hNKCfa1YmQJ0lM7pzfJGvbXEipn/S7afbOfaw2Kc=
+go.opentelemetry.io/otel v1.2.0/go.mod h1:aT17Fk0Z1Nor9e0uisf98LrntPGMnk4frBO9+dkf69I=
+go.opentelemetry.io/otel v1.3.0 h1:APxLf0eiBwLl+SOXiJJCVYzA1OOJNyAoV8C5RNRyy7Y=
+go.opentelemetry.io/otel v1.3.0/go.mod h1:PWIKzi6JCp7sM0k9yZ43VX+T345uNbAkDKwHVjb2PTs=
+go.opentelemetry.io/otel/exporters/jaeger v1.2.0/go.mod h1:KJLFbEMKTNPIfOxcg/WikIozEoKcPgJRz3Ce1vLlM8E=
+go.opentelemetry.io/otel/sdk v1.2.0/go.mod h1:jNN8QtpvbsKhgaC6V5lHiejMoKD+V8uadoSafgHPx1U=
+go.opentelemetry.io/otel/trace v1.2.0/go.mod h1:N5FLswTubnxKxOJHM7XZC074qpeEdLy3CgAVsdMucK0=
+go.opentelemetry.io/otel/trace v1.3.0 h1:doy8Hzb1RJ+I3yFhtDmwNc7tIyw1tNMOIsyPzp1NOGY=
+go.opentelemetry.io/otel/trace v1.3.0/go.mod h1:c/VDhno8888bvQYmbYLqe41/Ldmr/KKunbvWM4/fEjk=
+golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/graphql.go

@@ -0,0 +1,115 @@
+// Copyright Splunk Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package splunkgraphql provides OpenTelemetry instrumentation for the
+// github.com/graph-gophers/graphql-go module.
+package splunkgraphql
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/graph-gophers/graphql-go/errors"
+	"github.com/graph-gophers/graphql-go/introspection"
+	"github.com/graph-gophers/graphql-go/trace"
+	"go.opentelemetry.io/otel/codes"
+	oteltrace "go.opentelemetry.io/otel/trace"
+
+	gql "github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/internal"
+	"github.com/signalfx/splunk-otel-go/instrumentation/internal"
+)
+
+const instrumentationName = "github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql"
+
+// otelTracer implements the graphql-go/trace.Tracer interface using
+// OpenTelemetry.
+type otelTracer struct {
+	cfg internal.Config
+}
+
+var (
+	_ trace.Tracer                  = (*otelTracer)(nil)
+	_ trace.ValidationTracerContext = (*otelTracer)(nil)
+)
+
+// NewTracer returns a new trace.Tracer backed by OpenTelemetry.
+func NewTracer(opts ...Option) trace.Tracer {
+	cfg := internal.NewConfig(instrumentationName, localToInternal(opts)...)
+	return &otelTracer{cfg: *cfg}
+}
+
+func traceQueryFinishFunc(span oteltrace.Span) trace.TraceQueryFinishFunc {
+	return func(errs []*errors.QueryError) {
+		for _, err := range errs {
+			span.RecordError(err)
+		}
+		switch n := len(errs); n {
+		case 0:
+			// Nothing to do.
+		case 1:
+			span.SetStatus(codes.Error, errs[0].Error())
+		default:
+			msg := fmt.Sprintf("%s (and %d more errors)", errs[0], n-1)
+			span.SetStatus(codes.Error, msg)
+		}
+		span.End()
+	}
+}
+
+// TraceQuery traces a GraphQL query.
+func (t *otelTracer) TraceQuery(ctx context.Context, queryString, _ string, _ map[string]interface{}, _ map[string]*introspection.Type) (context.Context, trace.TraceQueryFinishFunc) {
+	spanCtx, span := t.cfg.ResolveTracer(ctx).Start(
+		ctx,
+		"GraphQL request",
+		oteltrace.WithSpanKind(oteltrace.SpanKindServer),
+		oteltrace.WithAttributes(gql.GraphQLQueryKey.String(queryString)),
+	)
+
+	return spanCtx, traceQueryFinishFunc(span)
+}
+
+// TraceField traces a GraphQL field access.
+func (t *otelTracer) TraceField(ctx context.Context, _, typeName, fieldName string, trivial bool, _ map[string]interface{}) (context.Context, trace.TraceFieldFinishFunc) {
+	if trivial {
+		return ctx, func(*errors.QueryError) {}
+	}
+
+	spanCtx, span := t.cfg.ResolveTracer(ctx).Start(
+		ctx,
+		"GraphQL field",
+		oteltrace.WithSpanKind(oteltrace.SpanKindServer),
+		oteltrace.WithAttributes(
+			gql.GraphQLFieldKey.String(fieldName),
+			gql.GraphQLTypeKey.String(typeName),
+		),
+	)
+
+	return spanCtx, func(err *errors.QueryError) {
+		if err != nil {
+			span.RecordError(err)
+			span.SetStatus(codes.Error, err.Error())
+		}
+		span.End()
+	}
+}
+
+// TraceValidation traces the schema validation step preceding an operation.
+func (t *otelTracer) TraceValidation(ctx context.Context) trace.TraceValidationFinishFunc {
+	_, span := t.cfg.ResolveTracer(ctx).Start(
+		ctx,
+		"GraphQL validation",
+		oteltrace.WithSpanKind(oteltrace.SpanKindInternal),
+	)
+	return traceQueryFinishFunc(span)
+}

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/internal/attribute.go

@@ -0,0 +1,26 @@
+// Copyright Splunk Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package internal provides common non-exported objects to the splunkgraphql
+// and the splunkgraphql/test modules
+package internal
+
+import "go.opentelemetry.io/otel/attribute"
+
+// GraphQL attributes.
+var (
+	GraphQLFieldKey = attribute.Key("graphql.field")
+	GraphQLQueryKey = attribute.Key("graphql.query")
+	GraphQLTypeKey  = attribute.Key("graphql.type")
+)

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/option.go

@@ -0,0 +1,55 @@
+// Copyright Splunk Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package splunkgraphql
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+
+	"github.com/signalfx/splunk-otel-go/instrumentation/internal"
+)
+
+func localToInternal(opts []Option) []internal.Option {
+	out := make([]internal.Option, len(opts))
+	for i, o := range opts {
+		out[i] = internal.OptionFunc(func(c *internal.Config) { o.apply(c) })
+	}
+	return out
+}
+
+// Option applies options to a configuration.
+type Option interface {
+	apply(*internal.Config)
+}
+
+type optionConv struct {
+	iOpt internal.Option
+}
+
+func (o optionConv) apply(c *internal.Config) {
+	o.iOpt.Apply(c)
+}
+
+// WithTracerProvider returns an Option that sets the TracerProvider used for
+// a configuration.
+func WithTracerProvider(tp trace.TracerProvider) Option {
+	return optionConv{iOpt: internal.WithTracerProvider(tp)}
+}
+
+// WithAttributes returns an Option that appends attr to the attributes set
+// for every span created.
+func WithAttributes(attr []attribute.KeyValue) Option {
+	return optionConv{iOpt: internal.WithAttributes(attr)}
+}

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/test/go.mod

@@ -0,0 +1,16 @@
+module github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/test
+
+go 1.16
+
+require (
+	github.com/graph-gophers/graphql-go v1.2.0
+	github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql v0.0.0-00010101000000-000000000000
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel/sdk v1.3.0
+	go.opentelemetry.io/otel/trace v1.3.0
+)
+
+replace (
+	github.com/signalfx/splunk-otel-go => ../../../../../../
+	github.com/signalfx/splunk-otel-go/instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql => ../
+)

instrumentation/github.com/graph-gophers/graphql-go/splunkgraphql/test/go.sum

@@ -0,0 +1,36 @@
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+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+go.opentelemetry.io/contrib/propagators/b3 v1.2.0/go.mod h1:kO8hNKCfa1YmQJ0lM7pzfJGvbXEipn/S7afbOfaw2Kc=
+go.opentelemetry.io/otel v1.2.0/go.mod h1:aT17Fk0Z1Nor9e0uisf98LrntPGMnk4frBO9+dkf69I=
+go.opentelemetry.io/otel v1.3.0 h1:APxLf0eiBwLl+SOXiJJCVYzA1OOJNyAoV8C5RNRyy7Y=
+go.opentelemetry.io/otel v1.3.0/go.mod h1:PWIKzi6JCp7sM0k9yZ43VX+T345uNbAkDKwHVjb2PTs=
+go.opentelemetry.io/otel/exporters/jaeger v1.2.0/go.mod h1:KJLFbEMKTNPIfOxcg/WikIozEoKcPgJRz3Ce1vLlM8E=
+go.opentelemetry.io/otel/sdk v1.2.0/go.mod h1:jNN8QtpvbsKhgaC6V5lHiejMoKD+V8uadoSafgHPx1U=
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