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// 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"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/setup/process"
)
type Connections struct {
db *sql.DB
writer Writer
globalConfig config.DatabaseOptions
processContext *process.ProcessContext
}
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) {
writer := NewDummyWriter()
if dbProperties.ConnectionString.IsSQLite() {
writer = NewExclusiveWriter()
}
var err error
if dbProperties.ConnectionString == "" {
// if no connectionString was provided, try the global one
dbProperties = &c.globalConfig
}
if dbProperties.ConnectionString != "" || c.db == nil {
// Open a new database connection using the supplied config.
c.db, err = Open(dbProperties, writer)
if err != nil {
return nil, nil, err
}
c.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()
_ = c.db.Close()
c.processContext.ComponentFinished()
}()
return c.db, c.writer, nil
}
if c.db != nil && c.writer != nil {
// Ignore the supplied config and return the global pool and
// writer.
return c.db, c.writer, nil
}
return nil, nil, fmt.Errorf("no database connections configured")
}
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