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database_operation_execution.go
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database_operation_execution.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 unified
import (
"context"
"fmt"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsontype"
"go.mongodb.org/mongo-driver/mongo/options"
)
// This file contains helpers to execute database operations.
func executeCreateCollection(ctx context.Context, operation *operation) (*operationResult, error) {
db, err := entities(ctx).database(operation.Object)
if err != nil {
return nil, err
}
var collName string
var cco options.CreateCollectionOptions
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "collection":
collName = val.StringValue()
case "expireAfterSeconds":
cco.SetExpireAfterSeconds(int64(val.Int32()))
case "timeseries":
tsElems, err := elem.Value().Document().Elements()
if err != nil {
return nil, err
}
tso := options.TimeSeries()
for _, elem := range tsElems {
key := elem.Key()
val := elem.Value()
switch key {
case "timeField":
tso.SetTimeField(val.StringValue())
case "metaField":
tso.SetMetaField(val.StringValue())
case "granularity":
tso.SetGranularity(val.StringValue())
default:
return nil, fmt.Errorf("unrecognized timeseries option %q", key)
}
}
cco.SetTimeSeriesOptions(tso)
default:
return nil, fmt.Errorf("unrecognized createCollection option %q", key)
}
}
if collName == "" {
return nil, newMissingArgumentError("collName")
}
err = db.CreateCollection(ctx, collName, &cco)
return newErrorResult(err), nil
}
func executeDropCollection(ctx context.Context, operation *operation) (*operationResult, error) {
db, err := entities(ctx).database(operation.Object)
if err != nil {
return nil, err
}
var collName string
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "collection":
collName = val.StringValue()
default:
return nil, fmt.Errorf("unrecognized dropCollection option %q", key)
}
}
if collName == "" {
return nil, newMissingArgumentError("collection")
}
err = db.Collection(collName).Drop(ctx)
return newErrorResult(err), nil
}
func executeListCollections(ctx context.Context, operation *operation) (*operationResult, error) {
db, err := entities(ctx).database(operation.Object)
if err != nil {
return nil, err
}
listCollArgs, err := createListCollectionsArguments(operation.Arguments)
if err != nil {
return nil, err
}
cursor, err := db.ListCollections(ctx, listCollArgs.filter, listCollArgs.opts)
if err != nil {
return newErrorResult(err), nil
}
defer cursor.Close(ctx)
var docs []bson.Raw
if err := cursor.All(ctx, &docs); err != nil {
return newErrorResult(err), nil
}
return newCursorResult(docs), nil
}
func executeListCollectionNames(ctx context.Context, operation *operation) (*operationResult, error) {
db, err := entities(ctx).database(operation.Object)
if err != nil {
return nil, err
}
listCollArgs, err := createListCollectionsArguments(operation.Arguments)
if err != nil {
return nil, err
}
names, err := db.ListCollectionNames(ctx, listCollArgs.filter, listCollArgs.opts)
if err != nil {
return newErrorResult(err), nil
}
_, data, err := bson.MarshalValue(names)
if err != nil {
return nil, fmt.Errorf("error converting collection names slice to BSON: %v", err)
}
return newValueResult(bsontype.Array, data, nil), nil
}
func executeRunCommand(ctx context.Context, operation *operation) (*operationResult, error) {
db, err := entities(ctx).database(operation.Object)
if err != nil {
return nil, err
}
var command bson.Raw
opts := options.RunCmd()
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "command":
command = val.Document()
case "commandName":
// This is only necessary for languages that cannot preserve key order in the command document, so we can
// ignore it.
case "readConcern":
// GODRIVER-1774: We currently don't support overriding read concern for RunCommand.
return nil, fmt.Errorf("readConcern in runCommand not supported")
case "readPreference":
var temp ReadPreference
if err := bson.Unmarshal(val.Document(), &temp); err != nil {
return nil, fmt.Errorf("error unmarshalling readPreference option: %v", err)
}
rp, err := temp.ToReadPrefOption()
if err != nil {
return nil, fmt.Errorf("error creating readpref.ReadPref object: %v", err)
}
opts.SetReadPreference(rp)
case "writeConcern":
// GODRIVER-1774: We currently don't support overriding write concern for RunCommand.
return nil, fmt.Errorf("writeConcern in runCommand not supported")
default:
return nil, fmt.Errorf("unrecognized runCommand option %q", key)
}
}
if command == nil {
return nil, newMissingArgumentError("command")
}
res, err := db.RunCommand(ctx, command, opts).DecodeBytes()
return newDocumentResult(res, err), nil
}