github.com/wdesplas/cloud-service-broker@v0.0.0-20211027135251-516a8547ca4c/db_service/db_service.go (about)

     1  // Copyright 2018 the Service Broker Project Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:generate go run dao_generator.go
    16  
    17  package db_service
    18  
    19  import (
    20  	"fmt"
    21  	"sync"
    22  
    23  	"code.cloudfoundry.org/lager"
    24  	"gorm.io/gorm"
    25  
    26  	_ "gorm.io/driver/sqlite"
    27  )
    28  
    29  var DbConnection *gorm.DB
    30  var once sync.Once
    31  
    32  // New instantiates the db connection and runs migrations
    33  func New(logger lager.Logger) *gorm.DB {
    34  	once.Do(func() {
    35  		DbConnection = SetupDb(logger)
    36  		if err := RunMigrations(DbConnection); err != nil {
    37  			panic(fmt.Sprintf("Error migrating database: %s", err.Error()))
    38  		}
    39  	})
    40  	return DbConnection
    41  }
    42  
    43  // defaultDatastore gets the default datastore for the given default database
    44  // instantiated in New(). In the future, all accesses of DbConnection will be
    45  // done through SqlDatastore and it will become the globally shared instance.
    46  func defaultDatastore() *SqlDatastore {
    47  	return &SqlDatastore{db: DbConnection}
    48  }
    49  
    50  type SqlDatastore struct {
    51  	db *gorm.DB
    52  }