mirror of
https://gitea.com/Lydanne/buildx.git
synced 2025-05-19 01:47:43 +08:00
b35a0f4718
Removes gogo/protobuf from buildx and updates to a version of moby/buildkit where gogo is removed. This also changes how the proto files are generated. This is because newer versions of protobuf are more strict about name conflicts. If two files have the same name (even if they are relative paths) and are used in different protoc commands, they'll conflict in the registry. Since protobuf file generation doesn't work very well with `paths=source_relative`, this removes the `go:generate` expression and just relies on the dockerfile to perform the generation. Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
/*
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*
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* Copyright 2017 gRPC authors.
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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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*
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*/
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// Package roundrobin defines a roundrobin balancer. Roundrobin balancer is
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// installed as one of the default balancers in gRPC, users don't need to
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// explicitly install this balancer.
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package roundrobin
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import (
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"math/rand"
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"sync/atomic"
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"google.golang.org/grpc/balancer"
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"google.golang.org/grpc/balancer/base"
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"google.golang.org/grpc/grpclog"
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)
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// Name is the name of round_robin balancer.
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const Name = "round_robin"
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var logger = grpclog.Component("roundrobin")
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// newBuilder creates a new roundrobin balancer builder.
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func newBuilder() balancer.Builder {
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return base.NewBalancerBuilder(Name, &rrPickerBuilder{}, base.Config{HealthCheck: true})
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}
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func init() {
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balancer.Register(newBuilder())
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}
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type rrPickerBuilder struct{}
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func (*rrPickerBuilder) Build(info base.PickerBuildInfo) balancer.Picker {
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logger.Infof("roundrobinPicker: Build called with info: %v", info)
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if len(info.ReadySCs) == 0 {
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return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
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}
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scs := make([]balancer.SubConn, 0, len(info.ReadySCs))
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for sc := range info.ReadySCs {
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scs = append(scs, sc)
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}
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return &rrPicker{
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subConns: scs,
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// Start at a random index, as the same RR balancer rebuilds a new
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// picker when SubConn states change, and we don't want to apply excess
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// load to the first server in the list.
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next: uint32(rand.Intn(len(scs))),
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}
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}
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type rrPicker struct {
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// subConns is the snapshot of the roundrobin balancer when this picker was
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// created. The slice is immutable. Each Get() will do a round robin
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// selection from it and return the selected SubConn.
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subConns []balancer.SubConn
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next uint32
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}
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func (p *rrPicker) Pick(balancer.PickInfo) (balancer.PickResult, error) {
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subConnsLen := uint32(len(p.subConns))
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nextIndex := atomic.AddUint32(&p.next, 1)
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sc := p.subConns[nextIndex%subConnsLen]
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return balancer.PickResult{SubConn: sc}, nil
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}
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