mirror of
https://github.com/1f349/dendrite.git
synced 2024-11-13 23:31:34 +00:00
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
// Copyright 2023 The Matrix.org Foundation C.I.C.
|
|
//
|
|
// 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 sqlutil
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
"sync"
|
|
|
|
"github.com/matrix-org/dendrite/setup/config"
|
|
"github.com/matrix-org/dendrite/setup/process"
|
|
)
|
|
|
|
type Connections struct {
|
|
globalConfig config.DatabaseOptions
|
|
processContext *process.ProcessContext
|
|
existingConnections sync.Map
|
|
}
|
|
|
|
type con struct {
|
|
db *sql.DB
|
|
writer Writer
|
|
}
|
|
|
|
func NewConnectionManager(processCtx *process.ProcessContext, globalConfig config.DatabaseOptions) *Connections {
|
|
return &Connections{
|
|
globalConfig: globalConfig,
|
|
processContext: processCtx,
|
|
}
|
|
}
|
|
|
|
func (c *Connections) Connection(dbProperties *config.DatabaseOptions) (*sql.DB, Writer, error) {
|
|
var err error
|
|
// If no connectionString was provided, try the global one
|
|
if dbProperties.ConnectionString == "" {
|
|
dbProperties = &c.globalConfig
|
|
// If we still don't have a connection string, that's a problem
|
|
if dbProperties.ConnectionString == "" {
|
|
return nil, nil, fmt.Errorf("no database connections configured")
|
|
}
|
|
}
|
|
|
|
writer := NewDummyWriter()
|
|
if dbProperties.ConnectionString.IsSQLite() {
|
|
writer = NewExclusiveWriter()
|
|
}
|
|
|
|
existing, loaded := c.existingConnections.LoadOrStore(dbProperties.ConnectionString, &con{})
|
|
if loaded {
|
|
// We found an existing connection
|
|
ex := existing.(*con)
|
|
return ex.db, ex.writer, nil
|
|
}
|
|
|
|
// Open a new database connection using the supplied config.
|
|
db, err := Open(dbProperties, writer)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
c.existingConnections.Store(dbProperties.ConnectionString, &con{db: db, writer: writer})
|
|
go func() {
|
|
if c.processContext == nil {
|
|
return
|
|
}
|
|
// If we have a ProcessContext, start a component and wait for
|
|
// Dendrite to shut down to cleanly close the database connection.
|
|
c.processContext.ComponentStarted()
|
|
<-c.processContext.WaitForShutdown()
|
|
_ = db.Close()
|
|
c.processContext.ComponentFinished()
|
|
}()
|
|
return db, writer, nil
|
|
|
|
}
|