mirror of
https://gitee.com/milvus-io/milvus.git
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136 lines
3.5 KiB
Go
136 lines
3.5 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package indexcoord
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import (
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"context"
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"errors"
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"github.com/milvus-io/milvus/internal/log"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/internal/allocator"
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"github.com/milvus-io/milvus/internal/proto/indexpb"
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)
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const (
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// IndexAddTaskName is the name of the operation to add index task.
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IndexAddTaskName = "IndexAddTask"
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)
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type task interface {
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Ctx() context.Context
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ID() UniqueID // return ReqID
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SetID(uid UniqueID) // set ReqID
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Name() string
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PreExecute(ctx context.Context) error
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Execute(ctx context.Context) error
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PostExecute(ctx context.Context) error
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WaitToFinish() error
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Notify(err error)
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OnEnqueue() error
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}
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// BaseTask is an basic instance of task.
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type BaseTask struct {
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done chan error
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ctx context.Context
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id UniqueID
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table *metaTable
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}
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// ID returns the id of index task.
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func (bt *BaseTask) ID() UniqueID {
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return bt.id
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}
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func (bt *BaseTask) setID(id UniqueID) {
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bt.id = id
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}
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// WaitToFinish will wait for the task to complete, if the context is done,
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// it means that the execution of the task has timed out.
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func (bt *BaseTask) WaitToFinish() error {
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select {
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case <-bt.ctx.Done():
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return errors.New("Task wait to finished timeout")
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case err := <-bt.done:
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return err
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}
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}
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// Notify will notify WaitToFinish that the task is completed or failed.
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func (bt *BaseTask) Notify(err error) {
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bt.done <- err
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}
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// IndexAddTask is used to record the information of the index tasks.
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type IndexAddTask struct {
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BaseTask
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req *indexpb.BuildIndexRequest
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indexBuildID UniqueID
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idAllocator *allocator.GlobalIDAllocator
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}
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// Ctx returns the context of the index task.
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func (it *IndexAddTask) Ctx() context.Context {
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return it.ctx
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}
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// ID returns the id of the index task.
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func (it *IndexAddTask) ID() UniqueID {
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return it.id
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}
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// SetID sets the id for index tasks.
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func (it *IndexAddTask) SetID(ID UniqueID) {
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it.BaseTask.setID(ID)
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}
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// Name returns the task name.
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func (it *IndexAddTask) Name() string {
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return IndexAddTaskName
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}
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// OnEnqueue assigns the indexBuildID to index task.
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func (it *IndexAddTask) OnEnqueue() error {
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var err error
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it.indexBuildID, err = it.idAllocator.AllocOne()
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if err != nil {
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return err
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}
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return nil
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}
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// PreExecute sets the indexBuildID to index task request.
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func (it *IndexAddTask) PreExecute(ctx context.Context) error {
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log.Debug("IndexCoord IndexAddTask PreExecute", zap.Any("IndexBuildID", it.indexBuildID))
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it.req.IndexBuildID = it.indexBuildID
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return nil
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}
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// Execute adds the index task to meta table.
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func (it *IndexAddTask) Execute(ctx context.Context) error {
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log.Debug("IndexCoord IndexAddTask Execute", zap.Any("IndexBuildID", it.indexBuildID))
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err := it.table.AddIndex(it.indexBuildID, it.req)
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if err != nil {
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return err
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}
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return nil
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}
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// PostExecute does nothing here.
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func (it *IndexAddTask) PostExecute(ctx context.Context) error {
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log.Debug("IndexCoord IndexAddTask PostExecute", zap.Any("IndexBuildID", it.indexBuildID))
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return nil
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}
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