mirror of https://github.com/grpc/grpc-go.git
60 lines
2.2 KiB
Go
60 lines
2.2 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 clusterresolver
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import (
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"google.golang.org/grpc/resolver"
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"google.golang.org/grpc/resolver/manual"
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xdstestutils "google.golang.org/grpc/xds/internal/testutils"
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"google.golang.org/grpc/xds/internal/xdsclient/xdsresource"
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)
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const (
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testDNSTarget = "dns.com"
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)
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var (
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testEDSUpdates []xdsresource.EndpointsUpdate
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)
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func init() {
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clab1 := xdstestutils.NewClusterLoadAssignmentBuilder(testClusterNames[0], nil)
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clab1.AddLocality(testSubZones[0], 1, 0, testEndpointAddrs[:1], nil)
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testEDSUpdates = append(testEDSUpdates, parseEDSRespProtoForTesting(clab1.Build()))
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clab2 := xdstestutils.NewClusterLoadAssignmentBuilder(testClusterNames[0], nil)
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clab2.AddLocality(testSubZones[1], 1, 0, testEndpointAddrs[1:2], nil)
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testEDSUpdates = append(testEDSUpdates, parseEDSRespProtoForTesting(clab2.Build()))
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}
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func setupDNS() (chan resolver.Target, chan struct{}, chan resolver.ResolveNowOptions, *manual.Resolver, func()) {
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dnsTargetCh := make(chan resolver.Target, 1)
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dnsCloseCh := make(chan struct{}, 1)
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resolveNowCh := make(chan resolver.ResolveNowOptions, 1)
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mr := manual.NewBuilderWithScheme("dns")
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mr.BuildCallback = func(target resolver.Target, _ resolver.ClientConn, _ resolver.BuildOptions) { dnsTargetCh <- target }
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mr.CloseCallback = func() { dnsCloseCh <- struct{}{} }
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mr.ResolveNowCallback = func(opts resolver.ResolveNowOptions) { resolveNowCh <- opts }
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oldNewDNS := newDNS
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newDNS = func(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) {
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return mr.Build(target, cc, opts)
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}
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return dnsTargetCh, dnsCloseCh, resolveNowCh, mr, func() { newDNS = oldNewDNS }
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}
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