mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-04 21:09:06 +08:00
117 lines
3.0 KiB
Go
117 lines
3.0 KiB
Go
// Licensed to the LF AI & Data foundation under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you 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 flowgraph
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/cockroachdb/errors"
|
|
)
|
|
|
|
// Flow Graph is no longer a graph rather than a simple pipeline, this simplified our code and increase recovery speed - xiaofan.
|
|
|
|
// TimeTickedFlowGraph flowgraph with input from tt msg stream
|
|
type TimeTickedFlowGraph struct {
|
|
nodeCtx map[NodeName]*nodeCtx
|
|
stopOnce sync.Once
|
|
startOnce sync.Once
|
|
closeWg *sync.WaitGroup
|
|
}
|
|
|
|
// AddNode add Node into flowgraph
|
|
func (fg *TimeTickedFlowGraph) AddNode(node Node) {
|
|
nodeCtx := nodeCtx{
|
|
node: node,
|
|
closeCh: make(chan struct{}),
|
|
closeWg: fg.closeWg,
|
|
}
|
|
fg.nodeCtx[node.Name()] = &nodeCtx
|
|
}
|
|
|
|
// SetEdges set directed edges from in nodes to out nodes
|
|
func (fg *TimeTickedFlowGraph) SetEdges(nodeName string, out []string) error {
|
|
currentNode, ok := fg.nodeCtx[nodeName]
|
|
if !ok {
|
|
errMsg := "Cannot find node:" + nodeName
|
|
return errors.New(errMsg)
|
|
}
|
|
|
|
if len(out) > 1 {
|
|
errMsg := "Flow graph now support only pipeline mode, with only one or zero output:" + nodeName
|
|
return errors.New(errMsg)
|
|
}
|
|
|
|
// init current node's downstream
|
|
// set out nodes
|
|
for _, name := range out {
|
|
outNode, ok := fg.nodeCtx[name]
|
|
if !ok {
|
|
errMsg := "Cannot find out node:" + name
|
|
return errors.New(errMsg)
|
|
}
|
|
maxQueueLength := outNode.node.MaxQueueLength()
|
|
outNode.inputChannel = make(chan []Msg, maxQueueLength)
|
|
currentNode.downstream = outNode
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Start starts all nodes in timetick flowgragh
|
|
func (fg *TimeTickedFlowGraph) Start() {
|
|
fg.startOnce.Do(func() {
|
|
for _, v := range fg.nodeCtx {
|
|
v.Start()
|
|
}
|
|
})
|
|
}
|
|
|
|
func (fg *TimeTickedFlowGraph) Blockall() {
|
|
for _, v := range fg.nodeCtx {
|
|
v.Block()
|
|
}
|
|
}
|
|
|
|
func (fg *TimeTickedFlowGraph) Unblock() {
|
|
for _, v := range fg.nodeCtx {
|
|
v.Unblock()
|
|
}
|
|
}
|
|
|
|
// Close closes all nodes in flowgraph
|
|
func (fg *TimeTickedFlowGraph) Close() {
|
|
fg.stopOnce.Do(func() {
|
|
for _, v := range fg.nodeCtx {
|
|
if v.node.IsInputNode() {
|
|
v.Close()
|
|
}
|
|
}
|
|
fg.closeWg.Wait()
|
|
})
|
|
}
|
|
|
|
// NewTimeTickedFlowGraph create timetick flowgraph
|
|
func NewTimeTickedFlowGraph(ctx context.Context) *TimeTickedFlowGraph {
|
|
flowGraph := TimeTickedFlowGraph{
|
|
nodeCtx: make(map[string]*nodeCtx),
|
|
closeWg: &sync.WaitGroup{},
|
|
}
|
|
|
|
return &flowGraph
|
|
}
|