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Viewing / Editing File: grpc_gcp.proto

// Copyright 2018 gRPC authors.
//
// 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.

syntax = "proto3";

package grpc.gcp;

message ApiConfig {
  // The channel pool configurations.
  ChannelPoolConfig channel_pool = 2;

// The method configurations.
  repeated MethodConfig method = 1001;
}

message ChannelPoolConfig {
  // The max number of channels in the pool.
  uint32 max_size = 1;
  // The idle timeout (seconds) of channels without bound affinity sessions.
  uint64 idle_timeout = 2;
  // The low watermark of max number of concurrent streams in a channel.
  // New channel will be created once it get hit, until we reach the max size
  // of the channel pool.
  uint32 max_concurrent_streams_low_watermark = 3;
}

message MethodConfig {
  // A fully qualified name of a gRPC method, or a wildcard pattern ending
  // with .*, such as foo.bar.A, foo.bar.*. Method configs are evaluated
  // sequentially, and the first one takes precedence.
  repeated string name = 1;

// The channel affinity configurations.
  AffinityConfig affinity = 1001;
}

message AffinityConfig {
  enum Command {
    // The annotated method will be required to be bound to an existing session
    // to execute the RPC. The corresponding <affinity_key_field_path> will be
    // used to find the affinity key from the request message.
    BOUND = 0;
    // The annotated method will establish the channel affinity with the channel
    // which is used to execute the RPC. The corresponding
    // <affinity_key_field_path> will be used to find the affinity key from the
    // response message.
    BIND = 1;
    // The annotated method will remove the channel affinity with the channel
    // which is used to execute the RPC. The corresponding
    // <affinity_key_field_path> will be used to find the affinity key from the
    // request message.
    UNBIND = 2;
  }
  // The affinity command applies on the selected gRPC methods.
  Command command = 2;
  // The field path of the affinity key in the request/response message.
  // For example: "f.a", "f.b.d", etc.
  string affinity_key = 3;
}

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