| // 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/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" |
| ) |
| |
| // KillCursors represents the killCursors command. |
| // |
| // The killCursors command kills a set of cursors. |
| type KillCursors struct { |
| Clock *session.ClusterClock |
| NS Namespace |
| IDs []int64 |
| |
| result result.KillCursors |
| err error |
| } |
| |
| // Encode will encode this command into a wire message for the given server description. |
| func (kc *KillCursors) Encode(desc description.SelectedServer) (wiremessage.WireMessage, error) { |
| encoded, err := kc.encode(desc) |
| if err != nil { |
| return nil, err |
| } |
| return encoded.Encode(desc) |
| } |
| |
| func (kc *KillCursors) encode(desc description.SelectedServer) (*Read, error) { |
| idVals := make([]bsonx.Val, 0, len(kc.IDs)) |
| for _, id := range kc.IDs { |
| idVals = append(idVals, bsonx.Int64(id)) |
| } |
| cmd := bsonx.Doc{ |
| {"killCursors", bsonx.String(kc.NS.Collection)}, |
| {"cursors", bsonx.Array(idVals)}, |
| } |
| |
| return &Read{ |
| Clock: kc.Clock, |
| DB: kc.NS.DB, |
| Command: cmd, |
| }, 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 (kc *KillCursors) Decode(desc description.SelectedServer, wm wiremessage.WireMessage) *KillCursors { |
| rdr, err := (&Read{}).Decode(desc, wm).Result() |
| if err != nil { |
| kc.err = err |
| return kc |
| } |
| return kc.decode(desc, rdr) |
| } |
| |
| func (kc *KillCursors) decode(desc description.SelectedServer, rdr bson.Raw) *KillCursors { |
| err := bson.Unmarshal(rdr, &kc.result) |
| if err != nil { |
| kc.err = err |
| return kc |
| } |
| return kc |
| } |
| |
| // Result returns the result of a decoded wire message and server description. |
| func (kc *KillCursors) Result() (result.KillCursors, error) { |
| if kc.err != nil { |
| return result.KillCursors{}, kc.err |
| } |
| |
| return kc.result, nil |
| } |
| |
| // Err returns the error set on this command. |
| func (kc *KillCursors) Err() error { return kc.err } |
| |
| // RoundTrip handles the execution of this command using the provided wiremessage.ReadWriter. |
| func (kc *KillCursors) RoundTrip(ctx context.Context, desc description.SelectedServer, rw wiremessage.ReadWriter) (result.KillCursors, error) { |
| cmd, err := kc.encode(desc) |
| if err != nil { |
| return result.KillCursors{}, err |
| } |
| |
| rdr, err := cmd.RoundTrip(ctx, desc, rw) |
| if err != nil { |
| return result.KillCursors{}, err |
| } |
| |
| return kc.decode(desc, rdr).Result() |
| } |