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author | 2025-03-09 17:47:56 +0100 | |
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committer | 2025-03-10 01:59:49 +0100 | |
commit | 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e (patch) | |
tree | f61faa581feaaeaba2542b9f2b8234a590684413 /vendor/google.golang.org/grpc/resolver_wrapper.go | |
parent | [chore] update URLs to forked source (diff) | |
download | gotosocial-3ac1ee16f377d31a0fb80c8dae28b6239ac4229e.tar.xz |
[chore] remove vendor
Diffstat (limited to 'vendor/google.golang.org/grpc/resolver_wrapper.go')
-rw-r--r-- | vendor/google.golang.org/grpc/resolver_wrapper.go | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/vendor/google.golang.org/grpc/resolver_wrapper.go b/vendor/google.golang.org/grpc/resolver_wrapper.go deleted file mode 100644 index 23bb3fb25..000000000 --- a/vendor/google.golang.org/grpc/resolver_wrapper.go +++ /dev/null @@ -1,201 +0,0 @@ -/* - * - * 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" - "strings" - "sync" - - "google.golang.org/grpc/internal/channelz" - "google.golang.org/grpc/internal/grpcsync" - "google.golang.org/grpc/internal/pretty" - "google.golang.org/grpc/resolver" - "google.golang.org/grpc/serviceconfig" -) - -// ccResolverWrapper is a wrapper on top of cc for resolvers. -// It implements resolver.ClientConn interface. -type ccResolverWrapper struct { - // The following fields are initialized when the wrapper is created and are - // read-only afterwards, and therefore can be accessed without a mutex. - cc *ClientConn - ignoreServiceConfig bool - serializer *grpcsync.CallbackSerializer - serializerCancel context.CancelFunc - - resolver resolver.Resolver // only accessed within the serializer - - // The following fields are protected by mu. Caller must take cc.mu before - // taking mu. - mu sync.Mutex - curState resolver.State - closed bool -} - -// newCCResolverWrapper initializes the ccResolverWrapper. It can only be used -// after calling start, which builds the resolver. -func newCCResolverWrapper(cc *ClientConn) *ccResolverWrapper { - ctx, cancel := context.WithCancel(cc.ctx) - return &ccResolverWrapper{ - cc: cc, - ignoreServiceConfig: cc.dopts.disableServiceConfig, - serializer: grpcsync.NewCallbackSerializer(ctx), - serializerCancel: cancel, - } -} - -// start builds the name resolver using the resolver.Builder in cc and returns -// any error encountered. It must always be the first operation performed on -// any newly created ccResolverWrapper, except that close may be called instead. -func (ccr *ccResolverWrapper) start() error { - errCh := make(chan error) - ccr.serializer.TrySchedule(func(ctx context.Context) { - if ctx.Err() != nil { - return - } - opts := resolver.BuildOptions{ - DisableServiceConfig: ccr.cc.dopts.disableServiceConfig, - DialCreds: ccr.cc.dopts.copts.TransportCredentials, - CredsBundle: ccr.cc.dopts.copts.CredsBundle, - Dialer: ccr.cc.dopts.copts.Dialer, - Authority: ccr.cc.authority, - } - var err error - ccr.resolver, err = ccr.cc.resolverBuilder.Build(ccr.cc.parsedTarget, ccr, opts) - errCh <- err - }) - return <-errCh -} - -func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOptions) { - ccr.serializer.TrySchedule(func(ctx context.Context) { - if ctx.Err() != nil || ccr.resolver == nil { - return - } - ccr.resolver.ResolveNow(o) - }) -} - -// close initiates async shutdown of the wrapper. To determine the wrapper has -// finished shutting down, the channel should block on ccr.serializer.Done() -// without cc.mu held. -func (ccr *ccResolverWrapper) close() { - channelz.Info(logger, ccr.cc.channelz, "Closing the name resolver") - ccr.mu.Lock() - ccr.closed = true - ccr.mu.Unlock() - - ccr.serializer.TrySchedule(func(context.Context) { - if ccr.resolver == nil { - return - } - ccr.resolver.Close() - ccr.resolver = nil - }) - ccr.serializerCancel() -} - -// UpdateState is called by resolver implementations to report new state to gRPC -// which includes addresses and service config. -func (ccr *ccResolverWrapper) UpdateState(s resolver.State) error { - ccr.cc.mu.Lock() - ccr.mu.Lock() - if ccr.closed { - ccr.mu.Unlock() - ccr.cc.mu.Unlock() - return nil - } - if s.Endpoints == nil { - s.Endpoints = make([]resolver.Endpoint, 0, len(s.Addresses)) - for _, a := range s.Addresses { - ep := resolver.Endpoint{Addresses: []resolver.Address{a}, Attributes: a.BalancerAttributes} - ep.Addresses[0].BalancerAttributes = nil - s.Endpoints = append(s.Endpoints, ep) - } - } - ccr.addChannelzTraceEvent(s) - ccr.curState = s - ccr.mu.Unlock() - return ccr.cc.updateResolverStateAndUnlock(s, nil) -} - -// ReportError is called by resolver implementations to report errors -// encountered during name resolution to gRPC. -func (ccr *ccResolverWrapper) ReportError(err error) { - ccr.cc.mu.Lock() - ccr.mu.Lock() - if ccr.closed { - ccr.mu.Unlock() - ccr.cc.mu.Unlock() - return - } - ccr.mu.Unlock() - channelz.Warningf(logger, ccr.cc.channelz, "ccResolverWrapper: reporting error to cc: %v", err) - ccr.cc.updateResolverStateAndUnlock(resolver.State{}, err) -} - -// NewAddress is called by the resolver implementation to send addresses to -// gRPC. -func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) { - ccr.cc.mu.Lock() - ccr.mu.Lock() - if ccr.closed { - ccr.mu.Unlock() - ccr.cc.mu.Unlock() - return - } - s := resolver.State{Addresses: addrs, ServiceConfig: ccr.curState.ServiceConfig} - ccr.addChannelzTraceEvent(s) - ccr.curState = s - ccr.mu.Unlock() - ccr.cc.updateResolverStateAndUnlock(s, nil) -} - -// ParseServiceConfig is called by resolver implementations to parse a JSON -// representation of the service config. -func (ccr *ccResolverWrapper) ParseServiceConfig(scJSON string) *serviceconfig.ParseResult { - return parseServiceConfig(scJSON, ccr.cc.dopts.maxCallAttempts) -} - -// addChannelzTraceEvent adds a channelz trace event containing the new -// state received from resolver implementations. -func (ccr *ccResolverWrapper) addChannelzTraceEvent(s resolver.State) { - if !logger.V(0) && !channelz.IsOn() { - return - } - var updates []string - var oldSC, newSC *ServiceConfig - var oldOK, newOK bool - if ccr.curState.ServiceConfig != nil { - oldSC, oldOK = ccr.curState.ServiceConfig.Config.(*ServiceConfig) - } - if s.ServiceConfig != nil { - newSC, newOK = s.ServiceConfig.Config.(*ServiceConfig) - } - if oldOK != newOK || (oldOK && newOK && oldSC.rawJSONString != newSC.rawJSONString) { - updates = append(updates, "service config updated") - } - if len(ccr.curState.Addresses) > 0 && len(s.Addresses) == 0 { - updates = append(updates, "resolver returned an empty address list") - } else if len(ccr.curState.Addresses) == 0 && len(s.Addresses) > 0 { - updates = append(updates, "resolver returned new addresses") - } - channelz.Infof(logger, ccr.cc.channelz, "Resolver state updated: %s (%v)", pretty.ToJSON(s), strings.Join(updates, "; ")) -} |