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https://gitee.com/milvus-io/milvus.git
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83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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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package cluster
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import (
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context "context"
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"fmt"
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"strconv"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/conc"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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)
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// Manager is the interface for worker manager.
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type Manager interface {
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GetWorker(ctx context.Context, nodeID int64) (Worker, error)
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}
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// WorkerBuilder is function alias to build a worker from NodeID
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type WorkerBuilder func(ctx context.Context, nodeID int64) (Worker, error)
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type grpcWorkerManager struct {
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workers *typeutil.ConcurrentMap[int64, Worker]
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builder WorkerBuilder
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sf conc.Singleflight[Worker] // singleflight.Group
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}
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// GetWorker returns worker with specified nodeID.
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func (m *grpcWorkerManager) GetWorker(ctx context.Context, nodeID int64) (Worker, error) {
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worker, ok := m.workers.Get(nodeID)
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var err error
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if !ok {
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worker, err, _ = m.sf.Do(strconv.FormatInt(nodeID, 10), func() (Worker, error) {
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worker, err = m.builder(ctx, nodeID)
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if err != nil {
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log.Warn("failed to build worker",
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zap.Int64("nodeID", nodeID),
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zap.Error(err),
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)
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return nil, err
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}
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old, exist := m.workers.GetOrInsert(nodeID, worker)
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if exist {
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worker.Stop()
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worker = old
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}
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return worker, nil
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})
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if err != nil {
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return nil, err
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}
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}
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if !worker.IsHealthy() {
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// TODO wrap error
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return nil, fmt.Errorf("node is not healthy: %d", nodeID)
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}
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return worker, nil
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}
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func NewWorkerManager(builder WorkerBuilder) Manager {
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return &grpcWorkerManager{
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workers: typeutil.NewConcurrentMap[int64, Worker](),
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builder: builder,
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}
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}
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