SDP（2）：ScalikeJDBC-Connection Pool Configuration详解编程语言
编程语言 详解 Connection Pool configuration SDP ScalikeJDBC
2023-06-13 09:20:38 时间
scalikeJDBC可以通过配置文件来设置连接池及全局系统参数。对配置文件的解析是通过TypesafeConfig工具库实现的。默认加载classpath下的application.conf,application.json和application.properties文件。作为尝试，我们可以在resource/application.conf文件里进行h2和mysql数据库的JDBC驱动参数定义：
# JDBC settings
db {
h2 {
driver="org.h2.Driver"
url="jdbc:h2:tcp://localhost/~/slickdemo"
user=""
password=""
poolInitialSize=5
poolMaxSize=7
poolConnectionTimeoutMillis=1000
poolValidationQuery="select 1 as one"
poolFactoryName="commons-dbcp"
db.mysql.driver="com.mysql.jdbc.Driver"
db.mysql.url="jdbc:mysql://localhost:3306/testdb"
db.mysql.user="root"
db.mysql.password="123"
db.mysql.poolInitialSize=5
db.mysql.poolMaxSize=7
db.mysql.poolConnectionTimeoutMillis=1000
db.mysql.poolValidationQuery="select 1 as one"
db.mysql.poolFactoryName="commons-dbcp"
# scallikejdbc Global settings
scalikejdbc.global.loggingSQLAndTime.enabled=true
scalikejdbc.global.loggingSQLAndTime.logLevel=info
scalikejdbc.global.loggingSQLAndTime.warningEnabled=true
scalikejdbc.global.loggingSQLAndTime.warningThresholdMillis=1000
scalikejdbc.global.loggingSQLAndTime.warningLogLevel=warn
scalikejdbc.global.loggingSQLAndTime.singleLineMode=false
scalikejdbc.global.loggingSQLAndTime.printUnprocessedStackTrace=false
scalikejdbc.global.loggingSQLAndTime.stackTraceDepth=10
上面h2和mysql设置采用了不同的格式。scalikeJDBC是在trait DBs中的setup(dbname)来进行dbname数据库连接池的设定的：
/**
* DB configurator
trait DBs { self: TypesafeConfigReader with TypesafeConfig with EnvPrefix =
def setup(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
val JDBCSettings(url, user, password, driver) = readJDBCSettings(dbName)
val cpSettings = readConnectionPoolSettings(dbName)
if (driver != null driver.trim.nonEmpty) {
Class.forName(driver)
ConnectionPool.add(dbName, url, user, password, cpSettings)
def setupAll(): Unit = {
loadGlobalSettings()
dbNames.foreach { dbName = setup(Symbol(dbName)) }
def close(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
ConnectionPool.close(dbName)
def closeAll(): Unit = {
ConnectionPool.closeAll
* Default DB setup executor
object DBs extends DBs
with TypesafeConfigReader
with StandardTypesafeConfig
with NoEnvPrefix
可以看到：setup(dbname)进行了dbname设置操作包括Class.forName(driver),ConnectionPool.add(dbname )。我们首先试试使用h2数据库进行一些操作：
import scalikejdbc._
import scalikejdbc.config._
import org.joda.time._
import scala.util._ //Try
import scalikejdbc.TxBoundary.Try._
object JDBCConfig extends App{
// DBs.setup/DBs.setupAll loads specified JDBC driver classes.
// DBs.setupAll()
DBs.setup(h2)
DBs.setup(mysql)
// Unlike DBs.setupAll(), DBs.setup() doesnt load configurations under global settings automatically
DBs.loadGlobalSettings()
val dbname = h2
//clear table object
try {
sql"""
drop table members
""".execute().apply()(NamedAutoSession(dbname))
catch {
case _: Throwable =
}
也可以用DBs.setupAll()来设定配置文件中的所有数据库设置。setupAll()还运行了loadGlobalSettings()。下面我们再进行实际的数据操作：
//construct SQL object
val createSQL: SQL[Nothing,NoExtractor] =SQL("""
create table members (
id bigint primary key auto_increment,
name varchar(30) not null,
description varchar(1000),
birthday date,
created_at timestamp not null
)""")
//run this SQL
createSQL.execute().apply()(NamedAutoSession(dbname)) //autoCommit
//data model
case class Member(
id: Long,
name: String,
description: Option[String] = None,
birthday: Option[LocalDate] = None,
createdAt: DateTime)
def create(name: String, birthday: Option[LocalDate], remarks: Option[String])(implicit session: DBSession): Member = {
val insertSQL: SQL[Nothing,NoExtractor] =
sql"""insert into members (name, birthday, description, created_at)
values (${name}, ${birthday}, ${remarks}, ${DateTime.now})"""
val id: Long = insertSQL.updateAndReturnGeneratedKey.apply()
Member(id, name, remarks, birthday,DateTime.now)
val users = List(
("John",new LocalDate("2008-03-01"),"youngest user"),
("Susan",new LocalDate("2000-11-03"),"middle aged user"),
("Peter",new LocalDate("1983-01-21"),"oldest user"),
val result: Try[List[Member]] =
NamedDB(dbname) localTx { implicit session =
Try {
val members: List[Member] = users.map { person =
create(person._1, Some(person._2), Some(person._3))
members
result match {
case Success(mlist) = println(s"batch added members: $mlist")
case Failure(err) = println(s"${err.getMessage}")
//data row converter
val toMember = (rs: WrappedResultSet) = Member(
id = rs.long("id"),
name = rs.string("name"),
description = rs.stringOpt("description"),
birthday = rs.jodaLocalDateOpt("birthday"),
createdAt = rs.jodaDateTime("created_at")
val selectSQL: SQL[Member,HasExtractor] = sql"""select * from members""".map(toMember)
val members: List[Member] = NamedDB(dbname) readOnly { implicit session =
selectSQL.list.apply()
println(s"all members: $members")
NamedDB(h2mem).close()
注意在过程中我们使用Named???（???)来指定目标数据库连接connection。在上面的配置文件中有一项属性poolFactoryName，它指定了具体使用的数据库连接池工具。scalikeJDBC提供了commons-dbcp,commons-dbcp2,bonecp如下：
poolFactoryName="commons-dbcp" poolFactoryName="commons=dbcp2" poolFactoryName="bonecp"
如果配置文件中不提供poolFactoryName的设置，默认为commons-dbcp。翻查了一下，上面这几个连接池管理工具都很陈旧了。想到slick用的是HikariCP，上网看了看2018年还进行了最近更新。下面我们就为scalikeJDBC增加HikariCP连接池管理工具支持。首先，我们需要用TypesafeConfig解析HikariCP配置后构建HikariConfig对象，然后用它来构建HikariDataSource。
下面是配置文件解析代码：
package configdbs
import scala.collection.mutable
import scala.concurrent.duration.Duration
import scala.language.implicitConversions
import com.typesafe.config._
import java.util.concurrent.TimeUnit
import java.util.Properties
import scalikejdbc.config._
import com.typesafe.config.Config
import com.zaxxer.hikari._
import scalikejdbc.ConnectionPoolFactoryRepository
/** Extension methods to make Typesafe Config easier to use */
class ConfigExtensionMethods(val c: Config) extends AnyVal {
import scala.collection.JavaConverters._
def getBooleanOr(path: String, default: = Boolean = false) = if(c.hasPath(path)) c.getBoolean(path) else default
def getIntOr(path: String, default: = Int = 0) = if(c.hasPath(path)) c.getInt(path) else default
def getStringOr(path: String, default: = String = null) = if(c.hasPath(path)) c.getString(path) else default
def getConfigOr(path: String, default: = Config = ConfigFactory.empty()) = if(c.hasPath(path)) c.getConfig(path) else default
def getMillisecondsOr(path: String, default: = Long = 0L) = if(c.hasPath(path)) c.getDuration(path, TimeUnit.MILLISECONDS) else default
def getDurationOr(path: String, default: = Duration = Duration.Zero) =
if(c.hasPath(path)) Duration(c.getDuration(path, TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS) else default
def getPropertiesOr(path: String, default: = Properties = null): Properties =
if(c.hasPath(path)) new ConfigExtensionMethods(c.getConfig(path)).toProperties else default
def toProperties: Properties = {
def toProps(m: mutable.Map[String, ConfigValue]): Properties = {
val props = new Properties(null)
m.foreach { case (k, cv) =
val v =
if(cv.valueType() == ConfigValueType.OBJECT) toProps(cv.asInstanceOf[ConfigObject].asScala)
else if(cv.unwrapped eq null) null
else cv.unwrapped.toString
if(v ne null) props.put(k, v)
props
toProps(c.root.asScala)
def getBooleanOpt(path: String): Option[Boolean] = if(c.hasPath(path)) Some(c.getBoolean(path)) else None
def getIntOpt(path: String): Option[Int] = if(c.hasPath(path)) Some(c.getInt(path)) else None
def getStringOpt(path: String) = Option(getStringOr(path))
def getPropertiesOpt(path: String) = Option(getPropertiesOr(path))
object ConfigExtensionMethods {
@inline implicit def configExtensionMethods(c: Config): ConfigExtensionMethods = new ConfigExtensionMethods(c)
trait HikariConfigReader extends TypesafeConfigReader {
self: TypesafeConfig = // with TypesafeConfigReader = //NoEnvPrefix =
import ConfigExtensionMethods.configExtensionMethods
def getFactoryName(dbName: Symbol): String = {
val c: Config = config.getConfig(envPrefix + "db." + dbName.name)
c.getStringOr("poolFactoryName", ConnectionPoolFactoryRepository.COMMONS_DBCP)
def hikariCPConfig(dbName: Symbol): HikariConfig = {
val hconf = new HikariConfig()
val c: Config = config.getConfig(envPrefix + "db." + dbName.name)
// Connection settings
if (c.hasPath("dataSourceClass")) {
hconf.setDataSourceClassName(c.getString("dataSourceClass"))
} else {
Option(c.getStringOr("driverClassName", c.getStringOr("driver"))).map(hconf.setDriverClassName _)
hconf.setJdbcUrl(c.getStringOr("url", null))
c.getStringOpt("user").foreach(hconf.setUsername)
c.getStringOpt("password").foreach(hconf.setPassword)
c.getPropertiesOpt("properties").foreach(hconf.setDataSourceProperties)
// Pool configuration
hconf.setConnectionTimeout(c.getMillisecondsOr("connectionTimeout", 1000))
hconf.setValidationTimeout(c.getMillisecondsOr("validationTimeout", 1000))
hconf.setIdleTimeout(c.getMillisecondsOr("idleTimeout", 600000))
hconf.setMaxLifetime(c.getMillisecondsOr("maxLifetime", 1800000))
hconf.setLeakDetectionThreshold(c.getMillisecondsOr("leakDetectionThreshold", 0))
hconf.setInitializationFailFast(c.getBooleanOr("initializationFailFast", false))
c.getStringOpt("connectionTestQuery").foreach(hconf.setConnectionTestQuery)
c.getStringOpt("connectionInitSql").foreach(hconf.setConnectionInitSql)
val numThreads = c.getIntOr("numThreads", 20)
hconf.setMaximumPoolSize(c.getIntOr("maxConnections", numThreads * 5))
hconf.setMinimumIdle(c.getIntOr("minConnections", numThreads))
hconf.setPoolName(c.getStringOr("poolName", dbName.name))
hconf.setRegisterMbeans(c.getBooleanOr("registerMbeans", false))
// Equivalent of ConnectionPreparer
hconf.setReadOnly(c.getBooleanOr("readOnly", false))
c.getStringOpt("isolation").map("TRANSACTION_" + _).foreach(hconf.setTransactionIsolation)
hconf.setCatalog(c.getStringOr("catalog", null))
hconf
}
hikariCPConfig函数返回了hconf。下面我们还需要修改DBs.setup调用HikariConfigReader里的函数来构建HikariDataSource已经相关的配置参数：
import scalikejdbc._
trait ConfigDBs {
self: TypesafeConfigReader with TypesafeConfig with HikariConfigReader =
def setup(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
getFactoryName(dbName) match {
case "hikaricp" = {
val hconf = hikariCPConfig(dbName)
val hikariCPSource = new HikariDataSource(hconf)
if (hconf.getDriverClassName != null hconf.getDriverClassName.trim.nonEmpty) {
Class.forName(hconf.getDriverClassName)
ConnectionPool.add(dbName, new DataSourceConnectionPool(hikariCPSource))
case _ = {
val JDBCSettings(url, user, password, driver) = readJDBCSettings(dbName)
val cpSettings = readConnectionPoolSettings(dbName)
if (driver != null driver.trim.nonEmpty) {
Class.forName(driver)
ConnectionPool.add(dbName, url, user, password, cpSettings)
def setupAll(): Unit = {
loadGlobalSettings()
dbNames.foreach { dbName = setup(Symbol(dbName)) }
def close(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
ConnectionPool.close(dbName)
def closeAll(): Unit = {
ConnectionPool.closeAll
case class ConfigDBsWithEnv(envValue: String) extends ConfigDBs
with TypesafeConfigReader
with StandardTypesafeConfig
with HikariConfigReader
with EnvPrefix {
override val env = Option(envValue)
}
增加了ConfigDBs对象来替代原来的DBs对象。在ConfigDBs.setup(dbname)实现了HikariCP的调用和配置。ConfigDBsWithEnv可以支持在配置文件中外包一层路径：
dev {
db {
h2 {
driver = "org.h2.Driver"
url = "jdbc:h2:tcp://localhost/~/slickdemo"
user = ""
password = ""
poolFactoryName = "hikaricp"
numThreads = 10
maxConnections = 12
minConnections = 4
keepAliveConnection = true
mysql {
driver = "com.mysql.jdbc.Driver"
url = "jdbc:mysql://localhost:3306/testdb"
user = "root"
password = "123"
poolInitialSize = 5
poolMaxSize = 7
poolConnectionTimeoutMillis = 1000
poolValidationQuery = "select 1 as one"
poolFactoryName = "bonecp"
# scallikejdbc Global settings
scalikejdbc.global.loggingSQLAndTime.enabled = true
scalikejdbc.global.loggingSQLAndTime.logLevel = info
scalikejdbc.global.loggingSQLAndTime.warningEnabled = true
scalikejdbc.global.loggingSQLAndTime.warningThresholdMillis = 1000
scalikejdbc.global.loggingSQLAndTime.warningLogLevel = warn
scalikejdbc.global.loggingSQLAndTime.singleLineMode = false
scalikejdbc.global.loggingSQLAndTime.printUnprocessedStackTrace = false
scalikejdbc.global.loggingSQLAndTime.stackTraceDepth = 10
}
好了，下面是增加了HikariCP的测试代码：
import configdbs._
import scalikejdbc._
import org.joda.time._
import scala.util._ //Try
import scalikejdbc.TxBoundary.Try._
object ConfigureDBs extends App {
ConfigDBsWithEnv("dev").setupAll()
val dbname = h2
//clear table object
try {
sql"""
drop table members
""".execute().apply()(NamedAutoSession(dbname))
catch {
case _: Throwable =
//construct SQL object
val createSQL: SQL[Nothing,NoExtractor] =SQL("""
create table members (
id bigint primary key auto_increment,
name varchar(30) not null,
description varchar(1000),
birthday date,
created_at timestamp not null
)""")
//run this SQL
createSQL.execute().apply()(NamedAutoSession(dbname)) //autoCommit
//data model
case class Member(
id: Long,
name: String,
description: Option[String] = None,
birthday: Option[LocalDate] = None,
createdAt: DateTime)
def create(name: String, birthday: Option[LocalDate], remarks: Option[String])(implicit session: DBSession): Member = {
val insertSQL: SQL[Nothing,NoExtractor] =
sql"""insert into members (name, birthday, description, created_at)
values (${name}, ${birthday}, ${remarks}, ${DateTime.now})"""
val id: Long = insertSQL.updateAndReturnGeneratedKey.apply()
Member(id, name, remarks, birthday,DateTime.now)
val users = List(
("John",new LocalDate("2008-03-01"),"youngest user"),
("Susan",new LocalDate("2000-11-03"),"middle aged user"),
("Peter",new LocalDate("1983-01-21"),"oldest user"),
val result: Try[List[Member]] =
NamedDB(dbname) localTx { implicit session =
Try {
val members: List[Member] = users.map { person =
create(person._1, Some(person._2), Some(person._3))
members
result match {
case Success(mlist) = println(s"batch added members: $mlist")
case Failure(err) = println(s"${err.getMessage}")
//data row converter
val toMember = (rs: WrappedResultSet) = Member(
id = rs.long("id"),
name = rs.string("name"),
description = rs.stringOpt("description"),
birthday = rs.jodaLocalDateOpt("birthday"),
createdAt = rs.jodaDateTime("created_at")
val selectSQL: SQL[Member,HasExtractor] = sql"""select * from members""".map(toMember)
val members: List[Member] = NamedDB(dbname) readOnly { implicit session =
selectSQL.list.apply()
println(s"all members: $members")
NamedDB(h2mem).close()
"org.scalikejdbc" %% "scalikejdbc" % "3.1.0",
"org.scalikejdbc" %% "scalikejdbc-test" % "3.1.0" % "test",
"org.scalikejdbc" %% "scalikejdbc-config" % "3.1.0",
"com.h2database" % "h2" % "1.4.196",
"mysql" % "mysql-connector-java" % "6.0.6",
"org.postgresql" % "postgresql" % "9.4-1205-jdbc42",
"commons-dbcp" % "commons-dbcp" % "1.4",
"org.apache.tomcat" % "tomcat-jdbc" % "9.0.2",
"com.zaxxer" % "HikariCP" % "2.7.4",
"com.jolbox" % "bonecp" % "0.8.0.RELEASE",
"ch.qos.logback" % "logback-classic" % "1.2.3"
)
resource/application.conf
# JDBC settings
test {
db {
h2 {
driver = "org.h2.Driver"
url = "jdbc:h2:tcp://localhost/~/slickdemo"
user = ""
password = ""
poolInitialSize = 5
poolMaxSize = 7
poolConnectionTimeoutMillis = 1000
poolValidationQuery = "select 1 as one"
poolFactoryName = "commons-dbcp2"
db.mysql.driver = "com.mysql.jdbc.Driver"
db.mysql.url = "jdbc:mysql://localhost:3306/testdb"
db.mysql.user = "root"
db.mysql.password = "123"
db.mysql.poolInitialSize = 5
db.mysql.poolMaxSize = 7
db.mysql.poolConnectionTimeoutMillis = 1000
db.mysql.poolValidationQuery = "select 1 as one"
db.mysql.poolFactoryName = "bonecp"
# scallikejdbc Global settings
scalikejdbc.global.loggingSQLAndTime.enabled = true
scalikejdbc.global.loggingSQLAndTime.logLevel = info
scalikejdbc.global.loggingSQLAndTime.warningEnabled = true
scalikejdbc.global.loggingSQLAndTime.warningThresholdMillis = 1000
scalikejdbc.global.loggingSQLAndTime.warningLogLevel = warn
scalikejdbc.global.loggingSQLAndTime.singleLineMode = false
scalikejdbc.global.loggingSQLAndTime.printUnprocessedStackTrace = false
scalikejdbc.global.loggingSQLAndTime.stackTraceDepth = 10
dev {
db {
h2 {
driver = "org.h2.Driver"
url = "jdbc:h2:tcp://localhost/~/slickdemo"
user = ""
password = ""
poolFactoryName = "hikaricp"
numThreads = 10
maxConnections = 12
minConnections = 4
keepAliveConnection = true
mysql {
driver = "com.mysql.jdbc.Driver"
url = "jdbc:mysql://localhost:3306/testdb"
user = "root"
password = "123"
poolInitialSize = 5
poolMaxSize = 7
poolConnectionTimeoutMillis = 1000
poolValidationQuery = "select 1 as one"
poolFactoryName = "bonecp"
# scallikejdbc Global settings
scalikejdbc.global.loggingSQLAndTime.enabled = true
scalikejdbc.global.loggingSQLAndTime.logLevel = info
scalikejdbc.global.loggingSQLAndTime.warningEnabled = true
scalikejdbc.global.loggingSQLAndTime.warningThresholdMillis = 1000
scalikejdbc.global.loggingSQLAndTime.warningLogLevel = warn
scalikejdbc.global.loggingSQLAndTime.singleLineMode = false
scalikejdbc.global.loggingSQLAndTime.printUnprocessedStackTrace = false
scalikejdbc.global.loggingSQLAndTime.stackTraceDepth = 10
}
HikariConfig.scala
package configdbs
import scala.collection.mutable
import scala.concurrent.duration.Duration
import scala.language.implicitConversions
import com.typesafe.config._
import java.util.concurrent.TimeUnit
import java.util.Properties
import scalikejdbc.config._
import com.typesafe.config.Config
import com.zaxxer.hikari._
import scalikejdbc.ConnectionPoolFactoryRepository
/** Extension methods to make Typesafe Config easier to use */
class ConfigExtensionMethods(val c: Config) extends AnyVal {
import scala.collection.JavaConverters._
def getBooleanOr(path: String, default: = Boolean = false) = if(c.hasPath(path)) c.getBoolean(path) else default
def getIntOr(path: String, default: = Int = 0) = if(c.hasPath(path)) c.getInt(path) else default
def getStringOr(path: String, default: = String = null) = if(c.hasPath(path)) c.getString(path) else default
def getConfigOr(path: String, default: = Config = ConfigFactory.empty()) = if(c.hasPath(path)) c.getConfig(path) else default
def getMillisecondsOr(path: String, default: = Long = 0L) = if(c.hasPath(path)) c.getDuration(path, TimeUnit.MILLISECONDS) else default
def getDurationOr(path: String, default: = Duration = Duration.Zero) =
if(c.hasPath(path)) Duration(c.getDuration(path, TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS) else default
def getPropertiesOr(path: String, default: = Properties = null): Properties =
if(c.hasPath(path)) new ConfigExtensionMethods(c.getConfig(path)).toProperties else default
def toProperties: Properties = {
def toProps(m: mutable.Map[String, ConfigValue]): Properties = {
val props = new Properties(null)
m.foreach { case (k, cv) =
val v =
if(cv.valueType() == ConfigValueType.OBJECT) toProps(cv.asInstanceOf[ConfigObject].asScala)
else if(cv.unwrapped eq null) null
else cv.unwrapped.toString
if(v ne null) props.put(k, v)
props
toProps(c.root.asScala)
def getBooleanOpt(path: String): Option[Boolean] = if(c.hasPath(path)) Some(c.getBoolean(path)) else None
def getIntOpt(path: String): Option[Int] = if(c.hasPath(path)) Some(c.getInt(path)) else None
def getStringOpt(path: String) = Option(getStringOr(path))
def getPropertiesOpt(path: String) = Option(getPropertiesOr(path))
object ConfigExtensionMethods {
@inline implicit def configExtensionMethods(c: Config): ConfigExtensionMethods = new ConfigExtensionMethods(c)
trait HikariConfigReader extends TypesafeConfigReader {
self: TypesafeConfig = // with TypesafeConfigReader = //NoEnvPrefix =
import ConfigExtensionMethods.configExtensionMethods
def getFactoryName(dbName: Symbol): String = {
val c: Config = config.getConfig(envPrefix + "db." + dbName.name)
c.getStringOr("poolFactoryName", ConnectionPoolFactoryRepository.COMMONS_DBCP)
def hikariCPConfig(dbName: Symbol): HikariConfig = {
val hconf = new HikariConfig()
val c: Config = config.getConfig(envPrefix + "db." + dbName.name)
// Connection settings
if (c.hasPath("dataSourceClass")) {
hconf.setDataSourceClassName(c.getString("dataSourceClass"))
} else {
Option(c.getStringOr("driverClassName", c.getStringOr("driver"))).map(hconf.setDriverClassName _)
hconf.setJdbcUrl(c.getStringOr("url", null))
c.getStringOpt("user").foreach(hconf.setUsername)
c.getStringOpt("password").foreach(hconf.setPassword)
c.getPropertiesOpt("properties").foreach(hconf.setDataSourceProperties)
// Pool configuration
hconf.setConnectionTimeout(c.getMillisecondsOr("connectionTimeout", 1000))
hconf.setValidationTimeout(c.getMillisecondsOr("validationTimeout", 1000))
hconf.setIdleTimeout(c.getMillisecondsOr("idleTimeout", 600000))
hconf.setMaxLifetime(c.getMillisecondsOr("maxLifetime", 1800000))
hconf.setLeakDetectionThreshold(c.getMillisecondsOr("leakDetectionThreshold", 0))
hconf.setInitializationFailFast(c.getBooleanOr("initializationFailFast", false))
c.getStringOpt("connectionTestQuery").foreach(hconf.setConnectionTestQuery)
c.getStringOpt("connectionInitSql").foreach(hconf.setConnectionInitSql)
val numThreads = c.getIntOr("numThreads", 20)
hconf.setMaximumPoolSize(c.getIntOr("maxConnections", numThreads * 5))
hconf.setMinimumIdle(c.getIntOr("minConnections", numThreads))
hconf.setPoolName(c.getStringOr("poolName", dbName.name))
hconf.setRegisterMbeans(c.getBooleanOr("registerMbeans", false))
// Equivalent of ConnectionPreparer
hconf.setReadOnly(c.getBooleanOr("readOnly", false))
c.getStringOpt("isolation").map("TRANSACTION_" + _).foreach(hconf.setTransactionIsolation)
hconf.setCatalog(c.getStringOr("catalog", null))
hconf
import scalikejdbc._
trait ConfigDBs {
self: TypesafeConfigReader with TypesafeConfig with HikariConfigReader =
def setup(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
getFactoryName(dbName) match {
case "hikaricp" = {
val hconf = hikariCPConfig(dbName)
val hikariCPSource = new HikariDataSource(hconf)
if (hconf.getDriverClassName != null hconf.getDriverClassName.trim.nonEmpty) {
Class.forName(hconf.getDriverClassName)
ConnectionPool.add(dbName, new DataSourceConnectionPool(hikariCPSource))
case _ = {
val JDBCSettings(url, user, password, driver) = readJDBCSettings(dbName)
val cpSettings = readConnectionPoolSettings(dbName)
if (driver != null driver.trim.nonEmpty) {
Class.forName(driver)
ConnectionPool.add(dbName, url, user, password, cpSettings)
def setupAll(): Unit = {
loadGlobalSettings()
dbNames.foreach { dbName = setup(Symbol(dbName)) }
def close(dbName: Symbol = ConnectionPool.DEFAULT_NAME): Unit = {
ConnectionPool.close(dbName)
def closeAll(): Unit = {
ConnectionPool.closeAll
case class ConfigDBsWithEnv(envValue: String) extends ConfigDBs
with TypesafeConfigReader
with StandardTypesafeConfig
with HikariConfigReader
with EnvPrefix {
override val env = Option(envValue)
}
ConfigDBs.scala
import configdbs._
import scalikejdbc._
import org.joda.time._
import scala.util._ //Try
import scalikejdbc.TxBoundary.Try._
object ConfigureDBs extends App {
ConfigDBsWithEnv("dev").setupAll()
val dbname = mysql
//clear table object
try {
sql"""
drop table members
""".execute().apply()(NamedAutoSession(dbname))
catch {
case _: Throwable =
//construct SQL object
val createSQL: SQL[Nothing,NoExtractor] =SQL("""
create table members (
id bigint primary key auto_increment,
name varchar(30) not null,
description varchar(1000),
birthday date,
created_at timestamp not null
)""")
//run this SQL
createSQL.execute().apply()(NamedAutoSession(dbname)) //autoCommit
//data model
case class Member(
id: Long,
name: String,
description: Option[String] = None,
birthday: Option[LocalDate] = None,
createdAt: DateTime)
def create(name: String, birthday: Option[LocalDate], remarks: Option[String])(implicit session: DBSession): Member = {
val insertSQL: SQL[Nothing,NoExtractor] =
sql"""insert into members (name, birthday, description, created_at)
values (${name}, ${birthday}, ${remarks}, ${DateTime.now})"""
val id: Long = insertSQL.updateAndReturnGeneratedKey.apply()
Member(id, name, remarks, birthday,DateTime.now)
val users = List(
("John",new LocalDate("2008-03-01"),"youngest user"),
("Susan",new LocalDate("2000-11-03"),"middle aged user"),
("Peter",new LocalDate("1983-01-21"),"oldest user"),
val result: Try[List[Member]] =
NamedDB(dbname) localTx { implicit session =
Try {
val members: List[Member] = users.map { person =
create(person._1, Some(person._2), Some(person._3))
members
result match {
case Success(mlist) = println(s"batch added members: $mlist")
case Failure(err) = println(s"${err.getMessage}")
//data row converter
val toMember = (rs: WrappedResultSet) = Member(
id = rs.long("id"),
name = rs.string("name"),
description = rs.stringOpt("description"),
birthday = rs.jodaLocalDateOpt("birthday"),
createdAt = rs.jodaDateTime("created_at")
val selectSQL: SQL[Member,HasExtractor] = sql"""select * from members""".map(toMember)
val members: List[Member] = NamedDB(dbname) readOnly { implicit session =
selectSQL.list.apply()
println(s"all members: $members")
NamedDB(h2mem).close()
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