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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * | ||
| * Copyright 2023 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 nop implements a balancer with all of its balancer operations as | ||
| // no-ops, other than returning a Transient Failure Picker on a Client Conn | ||
| // update. | ||
| package nop | ||
|
|
||
| import ( | ||
| "google.golang.org/grpc/balancer" | ||
| "google.golang.org/grpc/balancer/base" | ||
| "google.golang.org/grpc/connectivity" | ||
| ) | ||
|
|
||
| // bal is a balancer with all of its balancer operations as no-ops, other than | ||
| // returning a Transient Failure Picker on a Client Conn update. | ||
| type bal struct { | ||
| cc balancer.ClientConn | ||
| err error | ||
| } | ||
|
|
||
| // NewBalancer returns a no-op balancer. | ||
| func NewBalancer(cc balancer.ClientConn, err error) balancer.Balancer { | ||
| return &bal{ | ||
| cc: cc, | ||
| err: err, | ||
| } | ||
| } | ||
|
|
||
| // UpdateClientConnState updates the bal's Client Conn with an Error Picker | ||
| // and a Connectivity State of TRANSIENT_FAILURE. | ||
| func (b *bal) UpdateClientConnState(_ balancer.ClientConnState) error { | ||
| b.cc.UpdateState(balancer.State{ | ||
| Picker: base.NewErrPicker(b.err), | ||
| ConnectivityState: connectivity.TransientFailure, | ||
| }) | ||
| return nil | ||
| } | ||
|
|
||
| // ResolverError is a no-op. | ||
| func (b *bal) ResolverError(_ error) {} | ||
|
|
||
| // UpdateSubConnState is a no-op. | ||
| func (b *bal) UpdateSubConnState(_ balancer.SubConn, _ balancer.SubConnState) {} | ||
|
|
||
| // Close is a no-op. | ||
| func (b *bal) Close() {} |
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