github.com/erda-project/erda-infra@v1.0.9/examples/service/server/helloworld/provider.go (about)

     1  // Copyright (c) 2021 Terminus, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package example
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/erda-project/erda-infra/base/logs"
    21  	"github.com/erda-project/erda-infra/base/servicehub"
    22  	"github.com/erda-project/erda-infra/examples/service/protocol/pb"
    23  	"github.com/erda-project/erda-infra/pkg/transport"
    24  	"github.com/erda-project/erda-infra/pkg/transport/interceptor"
    25  )
    26  
    27  type config struct {
    28  }
    29  
    30  // +provider
    31  type provider struct {
    32  	Cfg            *config
    33  	Log            logs.Logger
    34  	Register       transport.Register
    35  	greeterService *greeterService
    36  	userService    *userService
    37  }
    38  
    39  func (p *provider) Init(ctx servicehub.Context) error {
    40  	// TODO initialize something ...
    41  
    42  	if p.Register != nil {
    43  		p.greeterService = &greeterService{p}
    44  		pb.RegisterGreeterServiceImp(p.Register, p.greeterService,
    45  			transport.WithInterceptors(func(h interceptor.Handler) interceptor.Handler {
    46  				p.Log.Info("wrap greeterService methods")
    47  				return func(ctx context.Context, req interface{}) (interface{}, error) {
    48  					info := transport.ContextServiceInfo(ctx)
    49  					p.Log.Infof("before %s/%s\n", info.Service(), info.Method())
    50  					header := transport.ContextHeader(ctx)
    51  					p.Log.Info("header: ", header)
    52  					p.Log.Info(req)
    53  					out, err := h(ctx, req)
    54  					p.Log.Infof("after %s/%s\n", info.Service(), info.Method())
    55  					return out, err
    56  				}
    57  			}),
    58  		)
    59  
    60  		p.userService = &userService{p}
    61  		pb.RegisterUserServiceImp(p.Register, p.userService,
    62  			transport.WithInterceptors(func(h interceptor.Handler) interceptor.Handler {
    63  				p.Log.Info("wrap userService methods")
    64  				return func(ctx context.Context, req interface{}) (interface{}, error) {
    65  					info := transport.ContextServiceInfo(ctx)
    66  					p.Log.Infof("before %s/%s\n", info.Service(), info.Method())
    67  					header := transport.ContextHeader(ctx)
    68  					p.Log.Info("header: ", header)
    69  					p.Log.Info(req)
    70  					out, err := h(ctx, req)
    71  					p.Log.Infof("after %s/%s\n", info.Service(), info.Method())
    72  					return out, err
    73  				}
    74  			}),
    75  		)
    76  	}
    77  	return nil
    78  }
    79  
    80  func (p *provider) Provide(ctx servicehub.DependencyContext, args ...interface{}) interface{} {
    81  	switch {
    82  	case ctx.Service() == "erda.infra.example.GreeterService" || ctx.Type() == pb.GreeterServiceServerType() || ctx.Type() == pb.GreeterServiceHandlerType():
    83  		return p.greeterService
    84  	case ctx.Service() == "erda.infra.example.UserService" || ctx.Type() == pb.UserServiceServerType() || ctx.Type() == pb.UserServiceHandlerType():
    85  		return p.userService
    86  	}
    87  	return p
    88  }
    89  
    90  func init() {
    91  	servicehub.Register("erda.infra.example", &servicehub.Spec{
    92  		Services:             pb.ServiceNames(),
    93  		Types:                pb.Types(),
    94  		OptionalDependencies: []string{"service-register"},
    95  		Description:          "",
    96  		ConfigFunc: func() interface{} {
    97  			return &config{}
    98  		},
    99  		Creator: func() servicehub.Provider {
   100  			return &provider{}
   101  		},
   102  	})
   103  }