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// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed 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
package command
import (
"context"
"github.com/mongodb/mongo-go-driver/bson"
"github.com/mongodb/mongo-go-driver/mongo/writeconcern"
"github.com/mongodb/mongo-go-driver/x/bsonx"
"github.com/mongodb/mongo-go-driver/x/mongo/driver/session"
"github.com/mongodb/mongo-go-driver/x/network/description"
"github.com/mongodb/mongo-go-driver/x/network/result"
"github.com/mongodb/mongo-go-driver/x/network/wiremessage"
)
// this is the amount of reserved buffer space in a message that the
// driver reserves for command overhead.
const reservedCommandBufferBytes = 16 * 10 * 10 * 10
// Insert represents the insert command.
//
// The insert command inserts a set of documents into the database.
//
// Since the Insert command does not return any value other than ok or
// an error, this type has no Err method.
type Insert struct {
ContinueOnError bool
Clock *session.ClusterClock
NS Namespace
Docs []bsonx.Doc
Opts []bsonx.Elem
WriteConcern *writeconcern.WriteConcern
Session *session.Client
batches []*WriteBatch
result result.Insert
err error
}
// Encode will encode this command into a wire message for the given server description.
func (i *Insert) Encode(desc description.SelectedServer) ([]wiremessage.WireMessage, error) {
err := i.encode(desc)
if err != nil {
return nil, err
}
return batchesToWireMessage(i.batches, desc)
}
func (i *Insert) encodeBatch(docs []bsonx.Doc, desc description.SelectedServer) (*WriteBatch, error) {
command, err := encodeBatch(docs, i.Opts, InsertCommand, i.NS.Collection)
if err != nil {
return nil, err
}
for _, opt := range i.Opts {
if opt.Key == "ordered" && !opt.Value.Boolean() {
i.ContinueOnError = true
break
}
}
return &WriteBatch{
&Write{
Clock: i.Clock,
DB: i.NS.DB,
Command: command,
WriteConcern: i.WriteConcern,
Session: i.Session,
},
len(docs),
}, nil
}
func (i *Insert) encode(desc description.SelectedServer) error {
batches, err := splitBatches(i.Docs, int(desc.MaxBatchCount), int(desc.MaxDocumentSize))
if err != nil {
return err
}
for _, docs := range batches {
cmd, err := i.encodeBatch(docs, desc)
if err != nil {
return err
}
i.batches = append(i.batches, cmd)
}
return nil
}
// Decode will decode the wire message using the provided server description. Errors during decoding
// are deferred until either the Result or Err methods are called.
func (i *Insert) Decode(desc description.SelectedServer, wm wiremessage.WireMessage) *Insert {
rdr, err := (&Write{}).Decode(desc, wm).Result()
if err != nil {
i.err = err
return i
}
return i.decode(desc, rdr)
}
func (i *Insert) decode(desc description.SelectedServer, rdr bson.Raw) *Insert {
i.err = bson.Unmarshal(rdr, &i.result)
return i
}
// Result returns the result of a decoded wire message and server description.
func (i *Insert) Result() (result.Insert, error) {
if i.err != nil {
return result.Insert{}, i.err
}
return i.result, nil
}
// Err returns the error set on this command.
func (i *Insert) Err() error { return i.err }
// RoundTrip handles the execution of this command using the provided wiremessage.ReadWriter.
//func (i *Insert) RoundTrip(ctx context.Context, desc description.SelectedServer, rw wiremessage.ReadWriter) (result.Insert, error) {
func (i *Insert) RoundTrip(
ctx context.Context,
desc description.SelectedServer,
rw wiremessage.ReadWriter,
) (result.Insert, error) {
if i.batches == nil {
err := i.encode(desc)
if err != nil {
return result.Insert{}, err
}
}
r, batches, err := roundTripBatches(
ctx, desc, rw,
i.batches,
i.ContinueOnError,
i.Session,
InsertCommand,
)
// if there are leftover batches, save them for retry
if batches != nil {
i.batches = batches
}
if err != nil {
return result.Insert{}, err
}
res := r.(result.Insert)
return res, nil
}