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63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
/*
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*
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* Copyright 2023 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 nop implements a balancer with all of its balancer operations as
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// no-ops, other than returning a Transient Failure Picker on a Client Conn
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// update.
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package nop
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import (
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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/connectivity"
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)
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// bal is a balancer with all of its balancer operations as no-ops, other than
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// returning a Transient Failure Picker on a Client Conn update.
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type bal struct {
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cc balancer.ClientConn
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err error
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}
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// NewBalancer returns a no-op balancer.
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func NewBalancer(cc balancer.ClientConn, err error) balancer.Balancer {
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return &bal{
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cc: cc,
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err: err,
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}
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}
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// UpdateClientConnState updates the bal's Client Conn with an Error Picker
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// and a Connectivity State of TRANSIENT_FAILURE.
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func (b *bal) UpdateClientConnState(_ balancer.ClientConnState) error {
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b.cc.UpdateState(balancer.State{
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Picker: base.NewErrPicker(b.err),
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ConnectivityState: connectivity.TransientFailure,
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})
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return nil
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}
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// ResolverError is a no-op.
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func (b *bal) ResolverError(_ error) {}
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// UpdateSubConnState is a no-op.
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func (b *bal) UpdateSubConnState(_ balancer.SubConn, _ balancer.SubConnState) {}
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// Close is a no-op.
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func (b *bal) Close() {}
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