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bulkinserter.go
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bulkinserter.go
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package mongo
import (
"time"
"github.com/globalsign/mgo"
"github.com/zeromicro/go-zero/core/executors"
"github.com/zeromicro/go-zero/core/logx"
)
const (
flushInterval = time.Second
maxBulkRows = 1000
)
type (
// ResultHandler is a handler that used to handle results.
ResultHandler func(*mgo.BulkResult, error)
// A BulkInserter is used to insert bulk of mongo records.
BulkInserter struct {
executor *executors.PeriodicalExecutor
inserter *dbInserter
}
)
// NewBulkInserter returns a BulkInserter.
func NewBulkInserter(session *mgo.Session, dbName string, collectionNamer func() string) *BulkInserter {
inserter := &dbInserter{
session: session,
dbName: dbName,
collectionNamer: collectionNamer,
}
return &BulkInserter{
executor: executors.NewPeriodicalExecutor(flushInterval, inserter),
inserter: inserter,
}
}
// Flush flushes the inserter, writes all pending records.
func (bi *BulkInserter) Flush() {
bi.executor.Flush()
}
// Insert inserts doc.
func (bi *BulkInserter) Insert(doc interface{}) {
bi.executor.Add(doc)
}
// SetResultHandler sets the result handler.
func (bi *BulkInserter) SetResultHandler(handler ResultHandler) {
bi.executor.Sync(func() {
bi.inserter.resultHandler = handler
})
}
type dbInserter struct {
session *mgo.Session
dbName string
collectionNamer func() string
documents []interface{}
resultHandler ResultHandler
}
func (in *dbInserter) AddTask(doc interface{}) bool {
in.documents = append(in.documents, doc)
return len(in.documents) >= maxBulkRows
}
func (in *dbInserter) Execute(objs interface{}) {
docs := objs.([]interface{})
if len(docs) == 0 {
return
}
bulk := in.session.DB(in.dbName).C(in.collectionNamer()).Bulk()
bulk.Insert(docs...)
bulk.Unordered()
result, err := bulk.Run()
if in.resultHandler != nil {
in.resultHandler(result, err)
} else if err != nil {
logx.Error(err)
}
}
func (in *dbInserter) RemoveAll() interface{} {
documents := in.documents
in.documents = nil
return documents
}