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collection.go
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collection.go
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package keelmongo
import (
"context"
"time"
"github.com/pkg/errors"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readconcern"
"go.mongodb.org/mongo-driver/mongo/readpref"
"go.mongodb.org/mongo-driver/mongo/writeconcern"
keelerrors "github.com/foomo/keel/errors"
keelpersistence "github.com/foomo/keel/persistence"
keeltime "github.com/foomo/keel/time"
)
type (
DecodeFn func(val interface{}) error
IterateHandlerFn func(decode DecodeFn) error
)
// Collection can only be used in the Persistor.WithCollection call.ss
type (
Collection struct {
collection *mongo.Collection
}
CollectionOptions struct {
*options.CollectionOptions
*options.CreateIndexesOptions
Indexes []mongo.IndexModel
IndexesContext context.Context
}
CollectionOption func(*CollectionOptions)
)
func DefaultCollectionOptions() CollectionOptions {
return CollectionOptions{
CollectionOptions: options.Collection(),
CreateIndexesOptions: options.CreateIndexes(),
IndexesContext: context.Background(),
}
}
func CollectionWithReadConcern(v *readconcern.ReadConcern) CollectionOption {
return func(o *CollectionOptions) {
o.CollectionOptions.SetReadConcern(v)
}
}
func CollectionWithWriteConcern(v *writeconcern.WriteConcern) CollectionOption {
return func(o *CollectionOptions) {
o.CollectionOptions.SetWriteConcern(v)
}
}
func CollectionWithReadPreference(v *readpref.ReadPref) CollectionOption {
return func(o *CollectionOptions) {
o.CollectionOptions.SetReadPreference(v)
}
}
func CollectionWithRegistry(v *bsoncodec.Registry) CollectionOption {
return func(o *CollectionOptions) {
o.CollectionOptions.SetRegistry(v)
}
}
func CollectionWithIndexes(v ...mongo.IndexModel) CollectionOption {
return func(o *CollectionOptions) {
o.Indexes = v
}
}
func CollectionWithIndexesMaxTime(v time.Duration) CollectionOption {
return func(o *CollectionOptions) {
o.CreateIndexesOptions.SetMaxTime(v)
}
}
func CollectionWithIndexesContext(v int32) CollectionOption {
return func(o *CollectionOptions) {
o.CreateIndexesOptions.SetCommitQuorumInt(v)
}
}
func CollectionWithIndexesQuorumMajority() CollectionOption {
return func(o *CollectionOptions) {
o.CreateIndexesOptions.SetCommitQuorumMajority()
}
}
func CollectionWithIndexesCommitQuorumString(v string) CollectionOption {
return func(o *CollectionOptions) {
o.CreateIndexesOptions.SetCommitQuorumString(v)
}
}
func CollectionWithIndexesCommitQuorumVotingMembers(v context.Context) CollectionOption {
return func(o *CollectionOptions) {
o.CreateIndexesOptions.SetCommitQuorumVotingMembers()
}
}
func NewCollection(db *mongo.Database, name string, opts ...CollectionOption) (*Collection, error) {
o := DefaultCollectionOptions()
for _, opt := range opts {
opt(&o)
}
col := db.Collection(name, o.CollectionOptions)
if len(o.Indexes) > 0 {
if _, err := col.Indexes().CreateMany(o.IndexesContext, o.Indexes, o.CreateIndexesOptions); err != nil {
return nil, err
}
}
return &Collection{
collection: col,
}, nil
}
// Col ...
func (c *Collection) Col() *mongo.Collection {
return c.collection
}
// Get ...
func (c *Collection) Get(ctx context.Context, id string, result interface{}, opts ...*options.FindOneOptions) error {
if id == "" {
return keelpersistence.ErrNotFound
}
return c.FindOne(ctx, bson.M{"id": id}, result, opts...)
}
// Exists ...
func (c *Collection) Exists(ctx context.Context, id string) (bool, error) {
if id == "" {
return false, nil
}
ret, err := c.collection.CountDocuments(ctx, bson.M{"id": id})
return ret > 0, err
}
// Upsert inserts/updates with protection against dirty-writes
// requires an unique index on id AND id + version
func (c *Collection) Upsert(ctx context.Context, id string, entity Entity) error {
if id == "" {
return errors.New("id must not be empty")
} else if entity == nil {
return errors.New("entity must not be nil")
}
if v, ok := entity.(EntityWithTimestamps); ok {
now := keeltime.Now()
if ct := v.GetCreatedAt(); ct.IsZero() {
v.SetCreatedAt(now)
}
v.SetUpdatedAt(now)
}
if v, ok := entity.(EntityWithVersion); ok {
currentVersion := v.GetVersion()
// increment version
v.IncreaseVersion()
if currentVersion == 0 {
// insert the new document
return c.Insert(ctx, entity)
} else if err := c.collection.FindOneAndUpdate(
ctx,
bson.D{{Key: "id", Value: id}, {Key: "version", Value: currentVersion}},
bson.D{{Key: "$set", Value: entity}},
options.FindOneAndUpdate().SetUpsert(false),
).Err(); errors.Is(err, mongo.ErrNoDocuments) {
return keelerrors.NewWrappedError(keelpersistence.ErrDirtyWrite, err)
} else if err != nil {
return err
}
} else if _, err := c.collection.UpdateOne(
ctx,
bson.D{{Key: "id", Value: id}},
bson.D{{Key: "$set", Value: entity}},
options.Update().SetUpsert(true),
); err != nil {
return err
}
return nil
}
func (c *Collection) Insert(ctx context.Context, entity Entity) error {
if _, err := c.collection.InsertOne(ctx, entity); err != nil {
return err
}
return nil
}
func (c *Collection) Delete(ctx context.Context, id string) error {
if id == "" {
return keelpersistence.ErrNotFound
}
if err := c.collection.FindOneAndDelete(ctx, bson.M{"id": id}).Err(); errors.Is(err, mongo.ErrNoDocuments) {
return keelerrors.NewWrappedError(keelpersistence.ErrNotFound, err)
} else if err != nil {
return err
}
return nil
}
// Find ...
func (c *Collection) Find(ctx context.Context, filter, results interface{}, opts ...*options.FindOptions) error {
cursor, err := c.collection.Find(ctx, filter, opts...)
if errors.Is(err, mongo.ErrNoDocuments) {
return keelerrors.NewWrappedError(keelpersistence.ErrNotFound, err)
} else if err != nil {
return err
}
defer CloseCursor(ctx, cursor, &err)
err = cursor.All(ctx, results)
return err
}
// FindOne ...
func (c *Collection) FindOne(ctx context.Context, filter, result interface{}, opts ...*options.FindOneOptions) error {
res := c.collection.FindOne(ctx, filter, opts...)
if errors.Is(res.Err(), mongo.ErrNoDocuments) {
return keelerrors.NewWrappedError(keelpersistence.ErrNotFound, res.Err())
} else if res.Err() != nil {
return res.Err()
}
return res.Decode(result)
}
// FindIterate ...
func (c *Collection) FindIterate(ctx context.Context, filter interface{}, handler IterateHandlerFn, opts ...*options.FindOptions) error {
cursor, err := c.collection.Find(ctx, filter, opts...)
if errors.Is(err, mongo.ErrNoDocuments) {
return keelerrors.NewWrappedError(keelpersistence.ErrNotFound, err)
} else if err != nil {
return err
}
defer CloseCursor(ctx, cursor, &err)
for cursor.Next(ctx) {
if err := handler(cursor.Decode); err != nil {
return err
}
}
return err
}
// Aggregate ...
func (c *Collection) Aggregate(ctx context.Context, pipeline mongo.Pipeline, results interface{}, opts ...*options.AggregateOptions) error {
cursor, err := c.collection.Aggregate(ctx, pipeline, opts...)
if err != nil {
return err
}
defer CloseCursor(ctx, cursor, &err)
err = cursor.All(ctx, results)
return err
}
func (c *Collection) AggregateIterate(
ctx context.Context,
pipeline mongo.Pipeline,
handler IterateHandlerFn,
opts ...*options.AggregateOptions,
) error {
cursor, err := c.collection.Aggregate(ctx, pipeline, opts...)
if err != nil {
return err
}
defer CloseCursor(ctx, cursor, &err)
for cursor.Next(ctx) {
if err := handler(cursor.Decode); err != nil {
return err
}
}
return nil
}
// Count returns the count of documents
func (c *Collection) Count(ctx context.Context, filter interface{}, opts ...*options.CountOptions) (int64, error) {
return c.collection.CountDocuments(ctx, filter, opts...)
}
// CountAll returns the count of all documents
func (c *Collection) CountAll(ctx context.Context) (int64, error) {
return c.Count(ctx, bson.D{})
}