github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/grpc/stats/handlers.go (about)

     1  /*
     2   *
     3   * Copyright 2016 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   */
    18  
    19  package stats
    20  
    21  import (
    22  	"context"
    23  	"net"
    24  )
    25  
    26  // ConnTagInfo defines the relevant information needed by connection context tagger.
    27  type ConnTagInfo struct {
    28  	// RemoteAddr is the remote address of the corresponding connection.
    29  	RemoteAddr net.Addr
    30  	// LocalAddr is the local address of the corresponding connection.
    31  	LocalAddr net.Addr
    32  }
    33  
    34  // RPCTagInfo defines the relevant information needed by RPC context tagger.
    35  type RPCTagInfo struct {
    36  	// FullMethodName is the RPC method in the format of /package.service/method.
    37  	FullMethodName string
    38  	// FailFast indicates if this RPC is failfast.
    39  	// This field is only valid on client side, it's always false on server side.
    40  	FailFast bool
    41  }
    42  
    43  // Handler defines the interface for the related stats handling (e.g., RPCs, connections).
    44  type Handler interface {
    45  	// TagRPC can attach some information to the given context.
    46  	// The context used for the rest lifetime of the RPC will be derived from
    47  	// the returned context.
    48  	TagRPC(context.Context, *RPCTagInfo) context.Context
    49  	// HandleRPC processes the RPC stats.
    50  	HandleRPC(context.Context, RPCStats)
    51  
    52  	// TagConn can attach some information to the given context.
    53  	// The returned context will be used for stats handling.
    54  	// For conn stats handling, the context used in HandleConn for this
    55  	// connection will be derived from the context returned.
    56  	// For RPC stats handling,
    57  	//  - On server side, the context used in HandleRPC for all RPCs on this
    58  	// connection will be derived from the context returned.
    59  	//  - On client side, the context is not derived from the context returned.
    60  	TagConn(context.Context, *ConnTagInfo) context.Context
    61  	// HandleConn processes the Conn stats.
    62  	HandleConn(context.Context, ConnStats)
    63  }