github.com/cloudwego/kitex@v0.9.0/pkg/remote/trans/invoke/invoke_handler.go (about)

     1  /*
     2   * Copyright 2021 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package invoke
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/cloudwego/kitex/pkg/remote"
    23  )
    24  
    25  // Handler is used to Call a Message.
    26  type Handler interface {
    27  	Call(Message) error
    28  }
    29  
    30  type ivkHandler struct {
    31  	opt       *remote.ServerOption
    32  	transHdlr remote.ServerTransHandler
    33  }
    34  
    35  // NewIvkHandler creates a invoker handler.
    36  func NewIvkHandler(opt *remote.ServerOption, transHdlr remote.ServerTransHandler) (Handler, error) {
    37  	return &ivkHandler{
    38  		opt:       opt,
    39  		transHdlr: transHdlr,
    40  	}, nil
    41  }
    42  
    43  // Call implements the Handler interface.
    44  func (s *ivkHandler) Call(msg Message) (err error) {
    45  	ctx := context.Background()
    46  	// do onConnActive
    47  	ctx, err = s.transHdlr.OnActive(ctx, msg)
    48  	if err != nil {
    49  		s.transHdlr.OnError(ctx, err, msg)
    50  		s.transHdlr.OnInactive(ctx, msg)
    51  		return
    52  	}
    53  	// do onConnRead
    54  	err = s.transHdlr.OnRead(ctx, msg)
    55  	if err != nil {
    56  		s.transHdlr.OnError(ctx, err, msg)
    57  		s.transHdlr.OnInactive(ctx, msg)
    58  		return
    59  	}
    60  	// do onConnInactive
    61  	s.transHdlr.OnInactive(ctx, msg)
    62  	return
    63  }