Init commit

go.mod

@@ -0,0 +1,32 @@
+module hello
+
+go 1.20
+
+require github.com/ServiceWeaver/weaver v0.1.1
+
+require (
+	github.com/BurntSushi/toml v1.2.0 // indirect
+	github.com/DataDog/hyperloglog v0.0.0-20220214164406-974598347557 // indirect
+	github.com/antlr/antlr4/runtime/Go/antlr v0.0.0-20220418222510-f25a4f6275ed // indirect
+	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/cel-go v0.12.5 // indirect
+	github.com/google/pprof v0.0.0-20221010195024-131d412537ea // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.1 // indirect
+	github.com/lightstep/varopt v1.3.0 // indirect
+	github.com/mattn/go-sqlite3 v1.14.16 // indirect
+	github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8 // indirect
+	github.com/stoewer/go-strcase v1.2.0 // indirect
+	go.opentelemetry.io/otel v1.13.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.7.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.11.1 // indirect
+	go.opentelemetry.io/otel/trace v1.13.0 // indirect
+	golang.org/x/exp v0.0.0-20230206171751-46f607a40771 // indirect
+	golang.org/x/sys v0.1.0 // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	google.golang.org/genproto v0.0.0-20221109142239-94d6d90a7d66 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+)

go.sum

@@ -0,0 +1,79 @@
+github.com/BurntSushi/toml v1.2.0 h1:Rt8g24XnyGTyglgET/PRUNlrUeu9F5L+7FilkXfZgs0=
+github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
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+github.com/DataDog/hyperloglog v0.0.0-20220214164406-974598347557/go.mod h1:hFPkswc42pKhRbeKDKXy05mRi7J1kJ2vMNbvd9erH0M=
+github.com/DataDog/mmh3 v0.0.0-20210722141835-012dc69a9e49 h1:EbzDX8HPk5uE2FsJYxD74QmMw0/3CqSKhEr6teh0ncQ=
+github.com/ServiceWeaver/weaver v0.1.1 h1:3tlmJ1f6IWoL9VbKGcTB/MmgNrMZTmrI7j2eCXyP5UQ=
+github.com/ServiceWeaver/weaver v0.1.1/go.mod h1:oSu9SXbBK9iPzH4Sz6EnFKiIrB4xJsP+U42sQ9R55Gw=
+github.com/antlr/antlr4/runtime/Go/antlr v0.0.0-20220418222510-f25a4f6275ed h1:ue9pVfIcP+QMEjfgo/Ez4ZjNZfonGgR6NgjMaJMu1Cg=
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+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/dustin/randbo v0.0.0-20140428231429-7f1b564ca724 h1:1/c0u68+2LRI+XSpduQpV9BnKx1k1P6GTb3MVxCE3w4=
+github.com/fsnotify/fsnotify v1.5.4 h1:jRbGcIw6P2Meqdwuo0H1p6JVLbL5DHKAKlYndzMwVZI=
+github.com/fsnotify/fsnotify v1.5.4/go.mod h1:OVB6XrOHzAwXMpEM7uPOzcehqUV2UqJxmVXmkdnm1bU=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
+github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/google/cel-go v0.12.5 h1:DmzaiSgoaqGCjtpPQWl26/gND+yRpim56H1jCVev6d8=
+github.com/google/cel-go v0.12.5/go.mod h1:Jk7ljRzLBhkmiAwBoUxB1sZSCVBAzkqPF25olK/iRDw=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
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+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/hashicorp/golang-lru/v2 v2.0.1 h1:5pv5N1lT1fjLg2VQ5KWc7kmucp2x/kvFOnxuVTqZ6x4=
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+github.com/mattn/go-sqlite3 v1.14.16 h1:yOQRA0RpS5PFz/oikGwBEqvAWhWg5ufRz4ETLjwpU1Y=
+github.com/mattn/go-sqlite3 v1.14.16/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8 h1:KoWmjvw+nsYOo29YJK9vDA65RGE3NrOnUtO7a+RF9HU=
+github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8/go.mod h1:HKlIX3XHQyzLZPlr7++PzdhaXEj94dEiJgZDTsxEqUI=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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+go.opentelemetry.io/otel v1.7.0/go.mod h1:5BdUoMIz5WEs0vt0CUEMtSSaTSHBBVwrhnz7+nrD5xk=
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+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.7.0 h1:8hPcgCg0rUJiKE6VWahRvjgLUrNl7rW2hffUEPKXVEM=
+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.7.0/go.mod h1:K4GDXPY6TjUiwbOh+DkKaEdCF8y+lvMoM6SeAPyfCCM=
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+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/ServiceWeaver/weaver"
+)
+
+func main() {
+	// Get a network listener on address "localhost:12345".
+	root := weaver.Init(context.Background())
+	opts := weaver.ListenerOptions{LocalAddress: "localhost:12345"}
+	lis, err := root.Listener("hello", opts)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("hello listener available on %v\n", lis)
+
+	// Get a client to the Reverser component.
+	reverser, err := weaver.Get[Reverser](root)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Serve the /hello endpoint.
+	http.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintf(w, "Hello, %s!\n", r.URL.Query().Get("name"))
+	})
+
+	// Serve the /reverse endpoint
+	http.HandleFunc("/reverse", func(w http.ResponseWriter, r *http.Request) {
+		reversed, err := reverser.Reverse(r.Context(), r.URL.Query().Get("name"))
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+		fmt.Fprintf(w, "Hello, %s!\n", reversed)
+	})
+
+	http.Serve(lis, nil)
+}

reverser.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"context"
+
+	"github.com/ServiceWeaver/weaver"
+)
+
+// Reverser component.
+type Reverser interface {
+	Reverse(context.Context, string) (string, error)
+}
+
+// Implementation of the Reverser component.
+type reverser struct {
+	weaver.Implements[Reverser]
+}
+
+func (r *reverser) Reverse(_ context.Context, s string) (string, error) {
+	runes := []rune(s)
+	n := len(runes)
+	for i := 0; i < n/2; i++ {
+		runes[i], runes[n-i-1] = runes[n-i-1], runes[i]
+	}
+	return string(runes), nil
+}

weaver.toml

@@ -0,0 +1,2 @@
+[serviceweaver]
+binary = "./hello"