mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-07-05 17:52:38 +00:00
961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
/*
|
|
*
|
|
* Copyright 2017 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.
|
|
*
|
|
*/
|
|
|
|
package grpc
|
|
|
|
import (
|
|
"context"
|
|
|
|
"google.golang.org/grpc/balancer"
|
|
"google.golang.org/grpc/connectivity"
|
|
"google.golang.org/grpc/grpclog"
|
|
"google.golang.org/grpc/resolver"
|
|
)
|
|
|
|
// PickFirstBalancerName is the name of the pick_first balancer.
|
|
const PickFirstBalancerName = "pick_first"
|
|
|
|
func newPickfirstBuilder() balancer.Builder {
|
|
return &pickfirstBuilder{}
|
|
}
|
|
|
|
type pickfirstBuilder struct{}
|
|
|
|
func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
|
|
return &pickfirstBalancer{cc: cc}
|
|
}
|
|
|
|
func (*pickfirstBuilder) Name() string {
|
|
return PickFirstBalancerName
|
|
}
|
|
|
|
type pickfirstBalancer struct {
|
|
cc balancer.ClientConn
|
|
sc balancer.SubConn
|
|
}
|
|
|
|
func (b *pickfirstBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
|
|
if err != nil {
|
|
grpclog.Infof("pickfirstBalancer: HandleResolvedAddrs called with error %v", err)
|
|
return
|
|
}
|
|
if b.sc == nil {
|
|
b.sc, err = b.cc.NewSubConn(addrs, balancer.NewSubConnOptions{})
|
|
if err != nil {
|
|
//TODO(yuxuanli): why not change the cc state to Idle?
|
|
grpclog.Errorf("pickfirstBalancer: failed to NewSubConn: %v", err)
|
|
return
|
|
}
|
|
b.cc.UpdateBalancerState(connectivity.Idle, &picker{sc: b.sc})
|
|
b.sc.Connect()
|
|
} else {
|
|
b.sc.UpdateAddresses(addrs)
|
|
b.sc.Connect()
|
|
}
|
|
}
|
|
|
|
func (b *pickfirstBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
|
|
grpclog.Infof("pickfirstBalancer: HandleSubConnStateChange: %p, %v", sc, s)
|
|
if b.sc != sc {
|
|
grpclog.Infof("pickfirstBalancer: ignored state change because sc is not recognized")
|
|
return
|
|
}
|
|
if s == connectivity.Shutdown {
|
|
b.sc = nil
|
|
return
|
|
}
|
|
|
|
switch s {
|
|
case connectivity.Ready, connectivity.Idle:
|
|
b.cc.UpdateBalancerState(s, &picker{sc: sc})
|
|
case connectivity.Connecting:
|
|
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrNoSubConnAvailable})
|
|
case connectivity.TransientFailure:
|
|
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrTransientFailure})
|
|
}
|
|
}
|
|
|
|
func (b *pickfirstBalancer) Close() {
|
|
}
|
|
|
|
type picker struct {
|
|
err error
|
|
sc balancer.SubConn
|
|
}
|
|
|
|
func (p *picker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
|
|
if p.err != nil {
|
|
return nil, nil, p.err
|
|
}
|
|
return p.sc, nil, nil
|
|
}
|
|
|
|
func init() {
|
|
balancer.Register(newPickfirstBuilder())
|
|
}
|