wvlet.airframe.jdbc.SQLiteConnectionPool.scala Maven / Gradle / Ivy
/*
* 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 wvlet.airframe.jdbc
import java.io.File
import java.sql.{Connection, DriverManager}
import wvlet.log.Guard
/**
*
*/
class SQLiteConnectionPool(val config: DbConfig) extends ConnectionPool with Guard {
private var conn: Connection = newConnection
private def newConnection: Connection = {
// Prepare parent db folder
Option(new File(config.database).getParentFile).map { p =>
if (!p.exists()) {
info(s"Create db folder: ${p}")
p.mkdirs()
}
}
val jdbcUrl = s"jdbc:sqlite:${config.database}"
info(s"Opening ${jdbcUrl}")
// We need to explicitly load sqlite-jdbc to cope with SBT's peculiar class loader
Class.forName("org.sqlite.JDBC")
val conn = DriverManager.getConnection(jdbcUrl)
conn.setAutoCommit(true)
conn
}
def withConnection[U](body: Connection => U): U = {
guard {
if (conn.isClosed) {
conn = newConnection
}
// In sqlite-jdbc, we can reuse the same connection instance,
// and we have no need to close the connection
body(conn)
}
}
def stop: Unit = {
info(s"Closing connection pool for ${config}")
conn.close()
}
}