mirror of https://github.com/grpc/grpc-go.git
59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
/*
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*
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* Copyright 2021 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 priority
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import (
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"sync/atomic"
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"google.golang.org/grpc/balancer"
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"google.golang.org/grpc/resolver"
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)
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// ignoreResolveNowClientConn wraps a balancer.ClientConn and overrides the
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// ResolveNow() method to ignore those calls if the ignoreResolveNow bit is set.
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type ignoreResolveNowClientConn struct {
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balancer.ClientConn
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ignoreResolveNow *uint32
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}
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func newIgnoreResolveNowClientConn(cc balancer.ClientConn, ignore bool) *ignoreResolveNowClientConn {
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ret := &ignoreResolveNowClientConn{
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ClientConn: cc,
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ignoreResolveNow: new(uint32),
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}
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ret.updateIgnoreResolveNow(ignore)
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return ret
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}
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func (i *ignoreResolveNowClientConn) updateIgnoreResolveNow(b bool) {
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if b {
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atomic.StoreUint32(i.ignoreResolveNow, 1)
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return
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}
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atomic.StoreUint32(i.ignoreResolveNow, 0)
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}
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func (i ignoreResolveNowClientConn) ResolveNow(o resolver.ResolveNowOptions) {
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if atomic.LoadUint32(i.ignoreResolveNow) != 0 {
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return
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}
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i.ClientConn.ResolveNow(o)
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}
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