/
request.go
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/
request.go
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// Copyright 2023 LiveKit, Inc.
//
// 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.
package psrpc
import (
"time"
"golang.org/x/exp/slices"
)
type RequestOption func(*RequestOpts)
type RequestOpts struct {
Timeout time.Duration
SelectionOpts SelectionOpts
Interceptors []any
}
type SelectionOpts struct {
MinimumAffinity float32 // minimum affinity for a server to be considered a valid handler
MaximumAffinity float32 // if > 0, any server returning a max score will be selected immediately
AcceptFirstAvailable bool // go fast
AffinityTimeout time.Duration // server selection deadline
ShortCircuitTimeout time.Duration // deadline imposed after receiving first response
SelectionFunc func([]*Claim) (string, error) // custom server selection function
}
type Claim struct {
ServerID string
Affinity float32
}
func WithRequestTimeout(timeout time.Duration) RequestOption {
return func(o *RequestOpts) {
o.Timeout = timeout
}
}
func WithSelectionOpts(opts SelectionOpts) RequestOption {
return func(o *RequestOpts) {
o.SelectionOpts = opts
}
}
type RequestInterceptor interface {
ClientRPCInterceptor | ClientMultiRPCInterceptor | StreamInterceptor
}
func WithRequestInterceptors[T RequestInterceptor](interceptors ...T) RequestOption {
return func(o *RequestOpts) {
o.Interceptors = slices.Grow(o.Interceptors, len(interceptors))
for _, i := range interceptors {
o.Interceptors = append(o.Interceptors, i)
}
}
}