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grpc_gcp.proto
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grpc_gcp.proto
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// 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;
}