| // 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" |
| ) |
| |
| // StartSession represents a startSession command |
| type StartSession struct { |
| Clock *session.ClusterClock |
| result result.StartSession |
| err error |
| } |
| |
| // Encode will encode this command into a wiremessage for the given server description. |
| func (ss *StartSession) Encode(desc description.SelectedServer) (wiremessage.WireMessage, error) { |
| cmd := ss.encode(desc) |
| return cmd.Encode(desc) |
| } |
| |
| func (ss *StartSession) encode(desc description.SelectedServer) *Write { |
| cmd := bsonx.Doc{{"startSession", bsonx.Int32(1)}} |
| return &Write{ |
| Clock: ss.Clock, |
| DB: "admin", |
| Command: cmd, |
| } |
| } |
| |
| // 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 (ss *StartSession) Decode(desc description.SelectedServer, wm wiremessage.WireMessage) *StartSession { |
| rdr, err := (&Write{}).Decode(desc, wm).Result() |
| if err != nil { |
| ss.err = err |
| return ss |
| } |
| |
| return ss.decode(desc, rdr) |
| } |
| |
| func (ss *StartSession) decode(desc description.SelectedServer, rdr bson.Raw) *StartSession { |
| ss.err = bson.Unmarshal(rdr, &ss.result) |
| return ss |
| } |
| |
| // Result returns the result of a decoded wire message and server description. |
| func (ss *StartSession) Result() (result.StartSession, error) { |
| if ss.err != nil { |
| return result.StartSession{}, ss.err |
| } |
| |
| return ss.result, nil |
| } |
| |
| // Err returns the error set on this command |
| func (ss *StartSession) Err() error { |
| return ss.err |
| } |
| |
| // RoundTrip handles the execution of this command using the provided wiremessage.ReadWriter |
| func (ss *StartSession) RoundTrip(ctx context.Context, desc description.SelectedServer, rw wiremessage.ReadWriter) (result.StartSession, error) { |
| cmd := ss.encode(desc) |
| rdr, err := cmd.RoundTrip(ctx, desc, rw) |
| if err != nil { |
| return result.StartSession{}, err |
| } |
| |
| return ss.decode(desc, rdr).Result() |
| } |