Question

我正在尝试将ScalikeJdbc与Teradata一起使用，但似乎无法使其工作。我有一个配置文件：

application.conf

# JDBC settings
db.default.user="user"
db.default.password="pass"
# Connection Pool settings
db.default.poolInitialSize=10
db.default.poolMaxSize=20
db.default.connectionTimeoutMillis=1000

# Teradata
db.default.driver="com.teradata.jdbc.TeraDriver"
db.default.url="jdbc:teradata://url/database=db"

代码如下所示：

import scalikejdbc._
import scalikejdbc.config._


object DBObject {
  DBs.setupAll()

  case class Ad(id: Long, siteId: Int)
  object Ad extends SQLSyntaxSupport[Ad] {
    override val tableName = "ad_table"

    def apply(rs: WrappedResultSet) = new Ad(rs.long("id"), rs.int("ad"))
  }

  ConnectionPool.borrow("default")
  val ad = Ad.syntax("ad")
  val ads = DB(ConnectionPool.borrow()) readOnly { implicit session =>
    withSQL {
      select.from(Ad as ad).where.eq(ad.siteId, 3001).limit(10)
    }.map(rs => Ad(rs)).list.apply
  }
}

运行此示例时会抛出异常：Connection pool is not yet initialized. 我在这里缺少什么？

Answer 1

蒂姆，我想它并不特别依赖Teradata。只是尝试首先初始化默认连接池。 Postgres的一个小例子：

object Main extends App {

  def run() = {
    Class.forName("org.postgresql.Driver")
    val poolSettings = new ConnectionPoolSettings(initialSize = 100, maxSize = 100)
    val url = "jdbc:postgresql://localhost:5432/test"
    val user = "postgres"
    val password = "postgres"

    // create singleton(default) connection pool
    ConnectionPool.singleton(url, user, password, poolSettings)

    DB.localTx { implicit session ⇒
      val foos = Foo.findAll()
      println(foos)
    }
  }

  run()
}

Scalikejdbc teradata“连接池尚未初始化。”

1 个答案: