Don Newton | 379ae25 | 2019-04-01 12:17:06 -0400 | [diff] [blame^] | 1 | // Copyright (C) MongoDB, Inc. 2017-present. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 4 | // not use this file except in compliance with the License. You may obtain |
| 5 | // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| 6 | |
| 7 | package command |
| 8 | |
| 9 | import ( |
| 10 | "context" |
| 11 | |
| 12 | "github.com/mongodb/mongo-go-driver/bson" |
| 13 | "github.com/mongodb/mongo-go-driver/mongo/writeconcern" |
| 14 | "github.com/mongodb/mongo-go-driver/x/bsonx" |
| 15 | "github.com/mongodb/mongo-go-driver/x/mongo/driver/session" |
| 16 | "github.com/mongodb/mongo-go-driver/x/network/description" |
| 17 | "github.com/mongodb/mongo-go-driver/x/network/result" |
| 18 | "github.com/mongodb/mongo-go-driver/x/network/wiremessage" |
| 19 | ) |
| 20 | |
| 21 | // this is the amount of reserved buffer space in a message that the |
| 22 | // driver reserves for command overhead. |
| 23 | const reservedCommandBufferBytes = 16 * 10 * 10 * 10 |
| 24 | |
| 25 | // Insert represents the insert command. |
| 26 | // |
| 27 | // The insert command inserts a set of documents into the database. |
| 28 | // |
| 29 | // Since the Insert command does not return any value other than ok or |
| 30 | // an error, this type has no Err method. |
| 31 | type Insert struct { |
| 32 | ContinueOnError bool |
| 33 | Clock *session.ClusterClock |
| 34 | NS Namespace |
| 35 | Docs []bsonx.Doc |
| 36 | Opts []bsonx.Elem |
| 37 | WriteConcern *writeconcern.WriteConcern |
| 38 | Session *session.Client |
| 39 | |
| 40 | batches []*WriteBatch |
| 41 | result result.Insert |
| 42 | err error |
| 43 | } |
| 44 | |
| 45 | // Encode will encode this command into a wire message for the given server description. |
| 46 | func (i *Insert) Encode(desc description.SelectedServer) ([]wiremessage.WireMessage, error) { |
| 47 | err := i.encode(desc) |
| 48 | if err != nil { |
| 49 | return nil, err |
| 50 | } |
| 51 | |
| 52 | return batchesToWireMessage(i.batches, desc) |
| 53 | } |
| 54 | |
| 55 | func (i *Insert) encodeBatch(docs []bsonx.Doc, desc description.SelectedServer) (*WriteBatch, error) { |
| 56 | command, err := encodeBatch(docs, i.Opts, InsertCommand, i.NS.Collection) |
| 57 | if err != nil { |
| 58 | return nil, err |
| 59 | } |
| 60 | |
| 61 | for _, opt := range i.Opts { |
| 62 | if opt.Key == "ordered" && !opt.Value.Boolean() { |
| 63 | i.ContinueOnError = true |
| 64 | break |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | return &WriteBatch{ |
| 69 | &Write{ |
| 70 | Clock: i.Clock, |
| 71 | DB: i.NS.DB, |
| 72 | Command: command, |
| 73 | WriteConcern: i.WriteConcern, |
| 74 | Session: i.Session, |
| 75 | }, |
| 76 | len(docs), |
| 77 | }, nil |
| 78 | } |
| 79 | |
| 80 | func (i *Insert) encode(desc description.SelectedServer) error { |
| 81 | batches, err := splitBatches(i.Docs, int(desc.MaxBatchCount), int(desc.MaxDocumentSize)) |
| 82 | if err != nil { |
| 83 | return err |
| 84 | } |
| 85 | |
| 86 | for _, docs := range batches { |
| 87 | cmd, err := i.encodeBatch(docs, desc) |
| 88 | if err != nil { |
| 89 | return err |
| 90 | } |
| 91 | |
| 92 | i.batches = append(i.batches, cmd) |
| 93 | } |
| 94 | return nil |
| 95 | } |
| 96 | |
| 97 | // Decode will decode the wire message using the provided server description. Errors during decoding |
| 98 | // are deferred until either the Result or Err methods are called. |
| 99 | func (i *Insert) Decode(desc description.SelectedServer, wm wiremessage.WireMessage) *Insert { |
| 100 | rdr, err := (&Write{}).Decode(desc, wm).Result() |
| 101 | if err != nil { |
| 102 | i.err = err |
| 103 | return i |
| 104 | } |
| 105 | |
| 106 | return i.decode(desc, rdr) |
| 107 | } |
| 108 | |
| 109 | func (i *Insert) decode(desc description.SelectedServer, rdr bson.Raw) *Insert { |
| 110 | i.err = bson.Unmarshal(rdr, &i.result) |
| 111 | return i |
| 112 | } |
| 113 | |
| 114 | // Result returns the result of a decoded wire message and server description. |
| 115 | func (i *Insert) Result() (result.Insert, error) { |
| 116 | if i.err != nil { |
| 117 | return result.Insert{}, i.err |
| 118 | } |
| 119 | return i.result, nil |
| 120 | } |
| 121 | |
| 122 | // Err returns the error set on this command. |
| 123 | func (i *Insert) Err() error { return i.err } |
| 124 | |
| 125 | // RoundTrip handles the execution of this command using the provided wiremessage.ReadWriter. |
| 126 | //func (i *Insert) RoundTrip(ctx context.Context, desc description.SelectedServer, rw wiremessage.ReadWriter) (result.Insert, error) { |
| 127 | func (i *Insert) RoundTrip( |
| 128 | ctx context.Context, |
| 129 | desc description.SelectedServer, |
| 130 | rw wiremessage.ReadWriter, |
| 131 | ) (result.Insert, error) { |
| 132 | if i.batches == nil { |
| 133 | err := i.encode(desc) |
| 134 | if err != nil { |
| 135 | return result.Insert{}, err |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | r, batches, err := roundTripBatches( |
| 140 | ctx, desc, rw, |
| 141 | i.batches, |
| 142 | i.ContinueOnError, |
| 143 | i.Session, |
| 144 | InsertCommand, |
| 145 | ) |
| 146 | |
| 147 | // if there are leftover batches, save them for retry |
| 148 | if batches != nil { |
| 149 | i.batches = batches |
| 150 | } |
| 151 | |
| 152 | if err != nil { |
| 153 | return result.Insert{}, err |
| 154 | } |
| 155 | |
| 156 | res := r.(result.Insert) |
| 157 | return res, nil |
| 158 | } |