milvus/internal/querynode/flow_graph_gc_node.go

package querynode

import (
	"log"
)

type gcNode struct {
	baseNode
	replica collectionReplica
}

func (gcNode *gcNode) Name() string {
	return "gcNode"
}

func (gcNode *gcNode) Operate(in []*Msg) []*Msg {
	//fmt.Println("Do gcNode operation")

	if len(in) != 1 {
		log.Println("Invalid operate message input in gcNode, input length = ", len(in))
		// TODO: add error handling
	}

	_, ok := (*in[0]).(*gcMsg)
	if !ok {
		log.Println("type assertion failed for gcMsg")
		// TODO: add error handling
	}

	// Use `releasePartition` and `releaseCollection`,
	// because if we drop collections or partitions here, query service doesn't know this behavior,
	// which would lead the wrong result of `showCollections` or `showPartition`

	//// drop collections
	//for _, collectionID := range gcMsg.gcRecord.collections {
	//	err := gcNode.replica.removeCollection(collectionID)
	//	if err != nil {
	//		log.Println(err)
	//	}
	//}
	//
	//// drop partitions
	//for _, partition := range gcMsg.gcRecord.partitions {
	//	err := gcNode.replica.removePartition(partition.partitionID)
	//	if err != nil {
	//		log.Println(err)
	//	}
	//}

	return nil
}

func newGCNode(replica collectionReplica) *gcNode {
	maxQueueLength := Params.FlowGraphMaxQueueLength
	maxParallelism := Params.FlowGraphMaxParallelism

	baseNode := baseNode{}
	baseNode.SetMaxQueueLength(maxQueueLength)
	baseNode.SetMaxParallelism(maxParallelism)

	return &gcNode{
		baseNode: baseNode,
		replica:  replica,
	}
}