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api.go
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api.go
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// Copyright 2024 The PipeCD Authors.
//
// 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 api
import (
"context"
"fmt"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
"google.golang.org/grpc"
"github.com/pipe-cd/pipecd/pkg/app/helloworld/service"
)
var (
helloCalls = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "hello_calls_total",
Help: "Number of hello calls.",
},
[]string{"gender"},
)
)
func init() {
prometheus.MustRegister(helloCalls)
}
type api struct {
service.UnimplementedHelloWorldServer
logger *zap.Logger
}
type Option func(*api)
func WithLogger(logger *zap.Logger) Option {
return func(a *api) {
a.logger = logger.Named("api")
}
}
// NewHelloWorldAPI creates new instance for api.
func NewHelloWorldAPI(opts ...Option) *api {
a := &api{
logger: zap.NewNop(),
}
for _, opt := range opts {
opt(a)
}
return a
}
func (a *api) Register(server *grpc.Server) {
service.RegisterHelloWorldServer(server, a)
}
func (a *api) Hello(ctx context.Context, in *service.HelloRequest) (*service.HelloResponse, error) {
m := "mr"
if in.Gender == service.HelloRequest_GENDER_FEMALE {
m = "mrs"
}
helloCalls.With(prometheus.Labels{"gender": m}).Inc()
return &service.HelloResponse{
Message: fmt.Sprintf("Hello, %s %s", m, in.Name),
}, nil
}