github.com/tickoalcantara12/micro/v3@v3.0.0-20221007104245-9d75b9bcbab9/service/server/wrapper.go (about)

     1  // Copyright 2020 Asim Aslam
     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  //     https://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  // Original source: github.com/micro/go-micro/v3/server/wrapper.go
    16  
    17  package server
    18  
    19  import (
    20  	"context"
    21  )
    22  
    23  // HandlerFunc represents a single method of a handler. It's used primarily
    24  // for the wrappers. What's handed to the actual method is the concrete
    25  // request and response types.
    26  type HandlerFunc func(ctx context.Context, req Request, rsp interface{}) error
    27  
    28  // SubscriberFunc represents a single method of a subscriber. It's used primarily
    29  // for the wrappers. What's handed to the actual method is the concrete
    30  // publication message.
    31  type SubscriberFunc func(ctx context.Context, msg Message) error
    32  
    33  // HandlerWrapper wraps the HandlerFunc and returns the equivalent
    34  type HandlerWrapper func(HandlerFunc) HandlerFunc
    35  
    36  // SubscriberWrapper wraps the SubscriberFunc and returns the equivalent
    37  type SubscriberWrapper func(SubscriberFunc) SubscriberFunc
    38  
    39  // StreamWrapper wraps a Stream interface and returns the equivalent.
    40  // Because streams exist for the lifetime of a method invocation this
    41  // is a convenient way to wrap a Stream as its in use for trace, monitoring,
    42  // metrics, etc.
    43  type StreamWrapper func(Stream) Stream