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https://github.com/hanzoai/psrpc.git
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zeekay
24eca416c1
PSRPC for Hanzo LiveKit, forked from livekit/psrpc (Apache-2.0). Two rewrites: github.com/livekit/psrpc -> github.com/hanzoai/psrpc github.com/redis/go-redis/v9 -> github.com/hanzokv/go/v9 psrpc's message bus (bus.go, internal/bus/bus_redis.go, internal/bus/bustest) speaks to a KV over go-redis. After hanzoai/livekit moved to our client, psrpc was the one remaining edge pulling upstream go-redis into that binary — not our code, but our dependency, the same shape redsync had for hanzoai/git. The other livekit/* modules (protocol, mediatransportutil, mageutil) are NOT forked and should not be: none of them touch a KV client, so they are ordinary external dependencies and their names are addresses.
63 lines
2.0 KiB
Go
63 lines
2.0 KiB
Go
// Copyright 2023 LiveKit, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package interceptors
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import (
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"context"
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"google.golang.org/protobuf/proto"
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"github.com/hanzoai/psrpc"
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"github.com/hanzoai/psrpc/pkg/info"
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)
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func ChainClientInterceptors[HandlerType any, InterceptorType ~func(psrpc.RPCInfo, HandlerType) HandlerType](
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interceptors []InterceptorType,
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requestInfo *info.RequestInfo,
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handler HandlerType,
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) HandlerType {
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for i := len(interceptors) - 1; i >= 0; i-- {
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handler = interceptors[i](requestInfo.RPCInfo, handler)
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}
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return handler
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}
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func ChainServerInterceptors(interceptors []psrpc.ServerRPCInterceptor) psrpc.ServerRPCInterceptor {
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switch n := len(interceptors); n {
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case 0:
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return nil
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case 1:
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return interceptors[0]
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default:
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return func(ctx context.Context, req proto.Message, rpcInfo psrpc.RPCInfo, handler psrpc.ServerRPCHandler) (proto.Message, error) {
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// the struct ensures the variables are allocated together, rather than separately, since we
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// know they should be garbage collected together. This saves 1 allocation and decreases
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// time/call by about 10% on the microbenchmark.
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var state struct {
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i int
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next psrpc.ServerRPCHandler
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}
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state.next = func(ctx context.Context, req proto.Message) (proto.Message, error) {
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if state.i == len(interceptors)-1 {
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return interceptors[state.i](ctx, req, rpcInfo, handler)
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}
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state.i++
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return interceptors[state.i-1](ctx, req, rpcInfo, state.next)
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}
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return state.next(ctx, req)
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}
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}
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}
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