provider.go

// Copyright (c) 2021 Terminus, 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 example

import (
	"context"
	"fmt"
	"time"

	"github.com/erda-project/erda-infra/base/logs"
	"github.com/erda-project/erda-infra/base/servicehub"
)

// Interface .
type Interface interface {
	Hello(name string) string
}

type config struct {
	// some fields of config for this provider
	Message string `file:"message" flag:"msg" default:"hi" desc:"message to print"`
}

// +provider
type provider struct {
	Cfg *config
	Log logs.Logger
}

// Init this is optional
func (p *provider) Init(ctx servicehub.Context) error {
	p.Log.Info("message: ", p.Cfg.Message)
	return nil
}

// Run this is optional
func (p *provider) Run(ctx context.Context) error {
	tick := time.NewTicker(3 * time.Second)
	defer tick.Stop()
	for {
		select {
		case <-tick.C:
			p.Log.Info("do something...")
		case <-ctx.Done():
			return nil
		}
	}
}

// Hello .
func (p *provider) Hello(name string) string {
	return fmt.Sprintf("hello %s", p.Cfg.Message)
}

func init() {
	servicehub.Register("helloworld", &servicehub.Spec{
		Services:    []string{"helloworld-service"},
		Description: "here is description of helloworld",
		ConfigFunc:  func() interface{} { return &config{} },
		Creator: func() servicehub.Provider {
			return &provider{}
		},
	})
}