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Signed-off-by: husharp <jinhao.hu@pingcap.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| // Copyright 2023 TiKV Project 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 pd | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/gogo/protobuf/proto" | ||
| "github.com/pingcap/kvproto/pkg/pdpb" | ||
| rmpb "github.com/pingcap/kvproto/pkg/resource_manager" | ||
| "github.com/pingcap/log" | ||
| "go.uber.org/zap" | ||
| "google.golang.org/grpc" | ||
| ) | ||
|
|
||
| // TODO: delete it when update proto | ||
| const GroupSettingsPathPrefix = "/settings" | ||
|
|
||
| // ResourceManagerClient manages resource groups. | ||
| type ResourceManagerClient interface { | ||
| // WatchResourceGroup watches resource groups changes. | ||
| WatchResourceGroup(ctx context.Context, revision int64) (chan []*rmpb.ResourceGroup, error) | ||
| } | ||
|
|
||
| // ResourceManagerClient returns the ResourceManagerClient from current PD leader. | ||
| func (c *client) resourceManagerClient() rmpb.ResourceManagerClient { | ||
| if cc, ok := c.clientConns.Load(c.GetLeaderAddr()); ok { | ||
| return rmpb.NewResourceManagerClient(cc.(*grpc.ClientConn)) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // WatchResourceGroup watches resource groups changes. | ||
| // It returns a stream of slices of resource groups. | ||
| // The first message in stream contains all current resource groups, | ||
| // all subsequent messages contains new put events for all resource groups. | ||
| func (c *client) WatchResourceGroup(ctx context.Context, revision int64) (chan []*rmpb.ResourceGroup, error) { | ||
| configChan, err := c.WatchGlobalConfig(ctx, GroupSettingsPathPrefix, revision) | ||
| resourceGroupWatcherChan := make(chan []*rmpb.ResourceGroup, 16) | ||
| go func() { | ||
| defer func() { | ||
| if r := recover(); r != nil { | ||
| log.Error("[pd] panic in ResourceManagerClient `WatchResourceGroups`", zap.Any("error", r)) | ||
| return | ||
| } | ||
| }() | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| close(resourceGroupWatcherChan) | ||
| return | ||
| case res, ok := <-configChan: | ||
| if !ok { | ||
| close(resourceGroupWatcherChan) | ||
| return | ||
| } | ||
| groups := make([]*rmpb.ResourceGroup, 0, len(res)) | ||
| for _, item := range res { | ||
| switch item.ItemKind { | ||
| case pdpb.ItemKind_PUT: | ||
| group := &rmpb.ResourceGroup{} | ||
| if err := proto.Unmarshal([]byte(item.Value), group); err != nil { | ||
| return | ||
| } | ||
| groups = append(groups, group) | ||
| case pdpb.ItemKind_DELETE: | ||
|
|
||
| } | ||
|
|
||
| } | ||
| resourceGroupWatcherChan <- groups | ||
| } | ||
| } | ||
| }() | ||
| return resourceGroupWatcherChan, err | ||
| } |
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