128 lines
3.7 KiB
Go
128 lines
3.7 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package proxycfgglue
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import (
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"context"
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"sort"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/cache"
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cachetype "github.com/hashicorp/consul/agent/cache-types"
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"github.com/hashicorp/consul/agent/proxycfg"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/agent/submatview"
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"github.com/hashicorp/consul/proto/private/pbcommon"
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"github.com/hashicorp/consul/proto/private/pbsubscribe"
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)
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// CacheServiceList satisfies the proxycfg.ServiceList interface by sourcing
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// data from the agent cache.
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func CacheServiceList(c *cache.Cache) proxycfg.ServiceList {
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return &cacheProxyDataSource[*structs.DCSpecificRequest]{c, cachetype.CatalogServiceListName}
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}
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func ServerServiceList(deps ServerDataSourceDeps, remoteSource proxycfg.ServiceList) proxycfg.ServiceList {
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return &serverServiceList{deps, remoteSource}
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}
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type serverServiceList struct {
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deps ServerDataSourceDeps
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remoteSource proxycfg.ServiceList
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}
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func (s *serverServiceList) Notify(ctx context.Context, req *structs.DCSpecificRequest, correlationID string, ch chan<- proxycfg.UpdateEvent) error {
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if req.Datacenter != s.deps.Datacenter {
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return s.remoteSource.Notify(ctx, req, correlationID, ch)
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}
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return s.deps.ViewStore.NotifyCallback(
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ctx,
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&serviceListRequest{s.deps, req},
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correlationID,
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dispatchCacheUpdate(ch),
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)
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}
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type serviceListRequest struct {
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deps ServerDataSourceDeps
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req *structs.DCSpecificRequest
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}
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func (r *serviceListRequest) Request(index uint64) *pbsubscribe.SubscribeRequest {
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return &pbsubscribe.SubscribeRequest{
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Topic: pbsubscribe.Topic_ServiceList,
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Subject: &pbsubscribe.SubscribeRequest_WildcardSubject{WildcardSubject: true},
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Index: index,
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Datacenter: r.req.Datacenter,
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Token: r.req.QueryOptions.Token,
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}
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}
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func (r *serviceListRequest) CacheInfo() cache.RequestInfo { return r.req.CacheInfo() }
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func (r *serviceListRequest) NewMaterializer() (submatview.Materializer, error) {
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return submatview.NewLocalMaterializer(submatview.LocalMaterializerDeps{
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Backend: r.deps.EventPublisher,
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ACLResolver: r.deps.ACLResolver,
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Deps: submatview.Deps{
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View: newServiceListView(r.req.EnterpriseMeta),
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Logger: r.deps.Logger,
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Request: r.Request,
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},
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}), nil
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}
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func (serviceListRequest) Type() string { return "proxycfgglue.ServiceList" }
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func newServiceListView(entMeta acl.EnterpriseMeta) *serviceListView {
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view := &serviceListView{entMeta: entMeta}
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view.Reset()
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return view
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}
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type serviceListView struct {
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entMeta acl.EnterpriseMeta
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state map[string]structs.ServiceName
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}
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func (v *serviceListView) Reset() { v.state = make(map[string]structs.ServiceName) }
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func (v *serviceListView) Update(events []*pbsubscribe.Event) error {
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for _, event := range filterByEnterpriseMeta(events, v.entMeta) {
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update := event.GetService()
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if update == nil {
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continue
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}
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var entMeta acl.EnterpriseMeta
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pbcommon.EnterpriseMetaToStructs(update.EnterpriseMeta, &entMeta)
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name := structs.NewServiceName(update.Name, &entMeta)
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switch update.Op {
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case pbsubscribe.CatalogOp_Register:
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v.state[name.String()] = name
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case pbsubscribe.CatalogOp_Deregister:
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delete(v.state, name.String())
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}
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}
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return nil
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}
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func (v *serviceListView) Result(index uint64) any {
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serviceList := make(structs.ServiceList, 0, len(v.state))
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for _, name := range v.state {
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serviceList = append(serviceList, name)
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}
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sort.Slice(serviceList, func(a, b int) bool {
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return serviceList[a].String() < serviceList[b].String()
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})
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return &structs.IndexedServiceList{
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Services: serviceList,
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QueryMeta: structs.QueryMeta{
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Backend: structs.QueryBackendStreaming,
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Index: index,
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},
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}
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}
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