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drop_database.go
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drop_database.go
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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/core/description"
"github.com/mongodb/mongo-go-driver/core/wiremessage"
)
// DropDatabase represents the DropDatabase command.
//
// The DropDatabases command drops database.
type DropDatabase struct {
DB string
result bson.Reader
err error
}
// Encode will encode this command into a wire message for the given server description.
func (dd *DropDatabase) Encode(desc description.SelectedServer) (wiremessage.WireMessage, error) {
cmd := bson.NewDocument(
bson.EC.Int32("dropDatabase", 1),
)
return (&Command{DB: dd.DB, Command: cmd, isWrite: true}).Encode(desc)
}
// 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 (dd *DropDatabase) Decode(desc description.SelectedServer, wm wiremessage.WireMessage) *DropDatabase {
dd.result, dd.err = (&Command{}).Decode(desc, wm).Result()
return dd
}
// Result returns the result of a decoded wire message and server description.
func (dd *DropDatabase) Result() (bson.Reader, error) {
if dd.err != nil {
return nil, dd.err
}
return dd.result, nil
}
// Err returns the error set on this command.
func (dd *DropDatabase) Err() error { return dd.err }
// RoundTrip handles the execution of this command using the provided wiremessage.ReadWriter.
func (dd *DropDatabase) RoundTrip(ctx context.Context, desc description.SelectedServer, rw wiremessage.ReadWriter) (bson.Reader, error) {
wm, err := dd.Encode(desc)
if err != nil {
return nil, err
}
err = rw.WriteWireMessage(ctx, wm)
if err != nil {
return nil, err
}
wm, err = rw.ReadWireMessage(ctx)
if err != nil {
return nil, err
}
return dd.Decode(desc, wm).Result()
}