forked from mongodb/mongo-go-driver
/
listDatabases.go
300 lines (248 loc) · 7.71 KB
/
listDatabases.go
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// Copyright (C) MongoDB, Inc. 2019-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
// Code generated by operationgen. DO NOT EDIT.
package operation
import (
"context"
"errors"
"fmt"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/event"
"go.mongodb.org/mongo-driver/mongo/readpref"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
"go.mongodb.org/mongo-driver/x/mongo/driver"
"go.mongodb.org/mongo-driver/x/mongo/driver/description"
"go.mongodb.org/mongo-driver/x/mongo/driver/session"
)
// ListDatabases performs a listDatabases operation.
type ListDatabases struct {
filter bsoncore.Document
nameOnly *bool
session *session.Client
clock *session.ClusterClock
monitor *event.CommandMonitor
database string
deployment driver.Deployment
readPreference *readpref.ReadPref
retry *driver.RetryMode
selector description.ServerSelector
crypt *driver.Crypt
result ListDatabasesResult
}
type ListDatabasesResult struct {
// An array of documents, one document for each database
Databases []databaseRecord
// The sum of the size of all the database files on disk in bytes.
TotalSize int64
}
type databaseRecord struct {
Name string
SizeOnDisk int64 `bson:"sizeOnDisk"`
Empty bool
}
func buildListDatabasesResult(response bsoncore.Document, srvr driver.Server) (ListDatabasesResult, error) {
elements, err := response.Elements()
if err != nil {
return ListDatabasesResult{}, err
}
ir := ListDatabasesResult{}
for _, element := range elements {
switch element.Key() {
case "totalSize":
var ok bool
ir.TotalSize, ok = element.Value().AsInt64OK()
if !ok {
err = fmt.Errorf("response field 'totalSize' is type int64, but received BSON type %s: %s", element.Value().Type, element.Value())
}
case "databases":
// TODO: Make operationgen handle array results.
arr, ok := element.Value().ArrayOK()
if !ok {
err = fmt.Errorf("response field 'databases' is type array, but received BSON type %s", element.Value().Type)
continue
}
var tmp bsoncore.Document
marshalErr := bson.Unmarshal(arr, &tmp)
if marshalErr != nil {
err = marshalErr
continue
}
records, marshalErr := tmp.Elements()
if marshalErr != nil {
err = marshalErr
continue
}
ir.Databases = make([]databaseRecord, len(records))
for i, val := range records {
valueDoc, ok := val.Value().DocumentOK()
if !ok {
err = fmt.Errorf("'databases' element is type document, but received BSON type %s", val.Value().Type)
continue
}
elems, marshalErr := valueDoc.Elements()
if marshalErr != nil {
err = marshalErr
continue
}
for _, elem := range elems {
switch elem.Key() {
case "name":
ir.Databases[i].Name, ok = elem.Value().StringValueOK()
if !ok {
err = fmt.Errorf("response field 'name' is type string, but received BSON type %s", elem.Value().Type)
continue
}
case "sizeOnDisk":
ir.Databases[i].SizeOnDisk, ok = elem.Value().AsInt64OK()
if !ok {
err = fmt.Errorf("response field 'sizeOnDisk' is type int64, but received BSON type %s", elem.Value().Type)
continue
}
case "empty":
ir.Databases[i].Empty, ok = elem.Value().BooleanOK()
if !ok {
err = fmt.Errorf("response field 'empty' is type bool, but received BSON type %s", elem.Value().Type)
continue
}
}
}
}
}
}
return ir, err
}
// NewListDatabases constructs and returns a new ListDatabases.
func NewListDatabases(filter bsoncore.Document) *ListDatabases {
return &ListDatabases{
filter: filter,
}
}
// Result returns the result of executing this operation.
func (ld *ListDatabases) Result() ListDatabasesResult { return ld.result }
func (ld *ListDatabases) processResponse(response bsoncore.Document, srvr driver.Server, desc description.Server) error {
var err error
ld.result, err = buildListDatabasesResult(response, srvr)
return err
}
// Execute runs this operations and returns an error if the operaiton did not execute successfully.
func (ld *ListDatabases) Execute(ctx context.Context) error {
if ld.deployment == nil {
return errors.New("the ListDatabases operation must have a Deployment set before Execute can be called")
}
return driver.Operation{
CommandFn: ld.command,
ProcessResponseFn: ld.processResponse,
Client: ld.session,
Clock: ld.clock,
CommandMonitor: ld.monitor,
Database: ld.database,
Deployment: ld.deployment,
ReadPreference: ld.readPreference,
RetryMode: ld.retry,
Type: driver.Read,
Selector: ld.selector,
Crypt: ld.crypt,
}.Execute(ctx, nil)
}
func (ld *ListDatabases) command(dst []byte, desc description.SelectedServer) ([]byte, error) {
dst = bsoncore.AppendInt32Element(dst, "listDatabases", 1)
if ld.filter != nil {
dst = bsoncore.AppendDocumentElement(dst, "filter", ld.filter)
}
if ld.nameOnly != nil {
dst = bsoncore.AppendBooleanElement(dst, "nameOnly", *ld.nameOnly)
}
return dst, nil
}
// Filter determines what results are returned from listDatabases.
func (ld *ListDatabases) Filter(filter bsoncore.Document) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.filter = filter
return ld
}
// NameOnly specifies whether to only return database names.
func (ld *ListDatabases) NameOnly(nameOnly bool) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.nameOnly = &nameOnly
return ld
}
// Session sets the session for this operation.
func (ld *ListDatabases) Session(session *session.Client) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.session = session
return ld
}
// ClusterClock sets the cluster clock for this operation.
func (ld *ListDatabases) ClusterClock(clock *session.ClusterClock) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.clock = clock
return ld
}
// CommandMonitor sets the monitor to use for APM events.
func (ld *ListDatabases) CommandMonitor(monitor *event.CommandMonitor) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.monitor = monitor
return ld
}
// Database sets the database to run this operation against.
func (ld *ListDatabases) Database(database string) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.database = database
return ld
}
// Deployment sets the deployment to use for this operation.
func (ld *ListDatabases) Deployment(deployment driver.Deployment) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.deployment = deployment
return ld
}
// ReadPreference set the read prefernce used with this operation.
func (ld *ListDatabases) ReadPreference(readPreference *readpref.ReadPref) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.readPreference = readPreference
return ld
}
// ServerSelector sets the selector used to retrieve a server.
func (ld *ListDatabases) ServerSelector(selector description.ServerSelector) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.selector = selector
return ld
}
// Retry enables retryable mode for this operation. Retries are handled automatically in driver.Operation.Execute based
// on how the operation is set.
func (ld *ListDatabases) Retry(retry driver.RetryMode) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.retry = &retry
return ld
}
// Crypt sets the Crypt object to use for automatic encryption and decryption.
func (ld *ListDatabases) Crypt(crypt *driver.Crypt) *ListDatabases {
if ld == nil {
ld = new(ListDatabases)
}
ld.crypt = crypt
return ld
}