mirror of
https://gitee.com/milvus-io/milvus.git
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124 lines
2.7 KiB
Go
124 lines
2.7 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 pipeline
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import (
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"fmt"
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"sync"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/timerecord"
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"go.uber.org/zap"
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)
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type Node interface {
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Name() string
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MaxQueueLength() int32
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Operate(in Msg) Msg
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Start()
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Close()
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}
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type nodeCtx struct {
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node Node
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inputChannel chan Msg
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next *nodeCtx
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checker *timerecord.GroupChecker
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closeCh chan struct{} // notify work to exit
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closeWg sync.WaitGroup
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}
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func (c *nodeCtx) Start() {
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c.closeWg.Add(1)
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c.node.Start()
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go c.work()
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}
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func (c *nodeCtx) Close() {
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close(c.closeCh)
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c.closeWg.Wait()
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}
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func (c *nodeCtx) work() {
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defer c.closeWg.Done()
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name := fmt.Sprintf("nodeCtxTtChecker-%s", c.node.Name())
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if c.checker != nil {
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c.checker.Check(name)
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defer c.checker.Remove(name)
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}
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for {
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select {
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//close
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case <-c.closeCh:
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c.node.Close()
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close(c.inputChannel)
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log.Debug("pipeline node closed", zap.String("nodeName", c.node.Name()))
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return
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case input := <-c.inputChannel:
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var output Msg
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output = c.node.Operate(input)
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if c.checker != nil {
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c.checker.Check(name)
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}
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if c.next != nil && output != nil {
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c.next.inputChannel <- output
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}
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}
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}
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}
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func newNodeCtx(node Node) *nodeCtx {
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return &nodeCtx{
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node: node,
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inputChannel: make(chan Msg, node.MaxQueueLength()),
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closeCh: make(chan struct{}),
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closeWg: sync.WaitGroup{},
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}
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}
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type BaseNode struct {
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name string
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maxQueueLength int32
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}
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// Return name of Node
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func (node *BaseNode) Name() string {
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return node.name
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}
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//length of pipeline input chnnel
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func (node *BaseNode) MaxQueueLength() int32 {
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return node.maxQueueLength
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}
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// Start implementing Node, base node does nothing when starts
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func (node *BaseNode) Start() {}
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// Close implementing Node, base node does nothing when stops
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func (node *BaseNode) Close() {}
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func NewBaseNode(name string, maxQueryLength int32) *BaseNode {
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return &BaseNode{
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name: name,
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maxQueueLength: maxQueryLength,
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}
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}
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