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helpers.go
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/
helpers.go
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// Copyright 2019 Aporeto Inc.
// 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package manipmongo
import (
"fmt"
"strconv"
"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
"go.aporeto.io/elemental"
"go.aporeto.io/manipulate"
"go.aporeto.io/manipulate/manipmongo/internal/compiler"
)
// CompileFilter compiles the given manipulate filter into a raw mongo filter.
func CompileFilter(f *elemental.Filter) bson.M {
return compiler.CompileFilter(f)
}
// DoesDatabaseExist checks if the database used by the given manipulator exists.
func DoesDatabaseExist(manipulator manipulate.Manipulator) (bool, error) {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to DoesDatabaseExist")
}
dbs, err := m.rootSession.DatabaseNames()
if err != nil {
return false, err
}
for _, db := range dbs {
if db == m.dbName {
return true, nil
}
}
return false, nil
}
// DropDatabase drops the entire database used by the given manipulator.
func DropDatabase(manipulator manipulate.Manipulator) error {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to CreateIndex")
}
session := m.rootSession.Copy()
defer session.Close()
return session.DB(m.dbName).DropDatabase()
}
// CreateIndex creates multiple mgo.Index for the collection storing info for the given identity using the given manipulator.
func CreateIndex(manipulator manipulate.Manipulator, identity elemental.Identity, indexes ...mgo.Index) error {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to CreateIndex")
}
session := m.rootSession.Copy()
defer session.Close()
collection := session.DB(m.dbName).C(identity.Name)
for i, index := range indexes {
if index.Name == "" {
index.Name = "index_" + identity.Name + "_" + strconv.Itoa(i)
}
if err := collection.EnsureIndex(index); err != nil {
return fmt.Errorf("unable to ensure index '%s': %s", index.Name, err)
}
}
return nil
}
// DeleteIndex deletes multiple mgo.Index for the collection.
func DeleteIndex(manipulator manipulate.Manipulator, identity elemental.Identity, indexes ...string) error {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to DeleteIndex")
}
session := m.rootSession.Copy()
defer session.Close()
collection := session.DB(m.dbName).C(identity.Name)
for _, index := range indexes {
if err := collection.DropIndexName(index); err != nil {
return err
}
}
return nil
}
// CreateCollection creates a collection using the given mgo.CollectionInfo.
func CreateCollection(manipulator manipulate.Manipulator, identity elemental.Identity, info *mgo.CollectionInfo) error {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to CreateCollection")
}
session := m.rootSession.Copy()
defer session.Close()
collection := session.DB(m.dbName).C(identity.Name)
return collection.Create(info)
}
// GetDatabase returns a ready to use mgo.Database. Use at your own risks.
// You are responsible for closing the session by calling the returner close function
func GetDatabase(manipulator manipulate.Manipulator) (*mgo.Database, func(), error) {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a mongo manipulator to GetSession")
}
session := m.rootSession.Copy()
return session.DB(m.dbName), func() { session.Close() }, nil
}
// SetConsistencyMode sets the mongo consistency mode of the mongo session.
func SetConsistencyMode(manipulator manipulate.Manipulator, mode mgo.Mode, refresh bool) {
m, ok := manipulator.(*mongoManipulator)
if !ok {
panic("you can only pass a Mongo Manipulator to SetConsistencyMode")
}
if m.rootSession == nil {
panic("cannot apply SetConsistencyMode. The root mongo session is not ready")
}
m.rootSession.SetMode(mode, refresh)
}