Slick 无法连接到 mssql 数据库

Question

我想使用Slick(3.2.3(连接到MSSQL数据库。

目前，我的项目如下。

在application.conf中，我有

somedbname = {
driver = "slick.jdbc.SQLServerProfile$"
db {
host = "somehost"
port = "someport"
databaseName = "Recupel.Datawarehouse"
url = "jdbc:sqlserver://"${somedbname.db.host}":"${somedbname.db.port}";databaseName="${somedbname.db.databaseName}";"
user = "someuser"
password = "somepassword"
}
}

"somehost"看起来像XX.X.X.XX.XX，其中X是数字。

我的build.sbt包含

name := "test-slick"
version := "0.1"
scalaVersion in ThisBuild := "2.12.7"
libraryDependencies ++= Seq(
"com.typesafe.slick" %% "slick" % "3.2.3",
"com.typesafe.slick" %% "slick-hikaricp" % "3.2.3",
"org.slf4j" % "slf4j-nop" % "1.6.4",
"com.microsoft.sqlserver" % "mssql-jdbc" % "7.0.0.jre10"
)

带有"main"对象的文件包含

import slick.basic.DatabaseConfig
import slick.jdbc.JdbcProfile
import slick.jdbc.SQLServerProfile.api._
import scala.concurrent.Await
import scala.concurrent.duration._

val dbConfig: DatabaseConfig[JdbcProfile] = DatabaseConfig.forConfig("somedbname")
val db: JdbcProfile#Backend#Database = dbConfig.db
def main(args: Array[String]): Unit = {
try {
val future = db.run(sql"SELECT * FROM somettable".as[(Int, String, String, String, String,
String, String, String, String, String, String, String)])
println(Await.result(future, 10.seconds))
} finally {
db.close()
}

}
}

根据我能找到的所有文档，这应该足以连接到数据库。然而，当我运行这个时，我会得到

[error] (run-main-0) java.sql.SQLTransientConnectionException: somedbname.db - Connection is not available, request timed out after 1004ms.
[error] java.sql.SQLTransientConnectionException: somedbname.db - Connection is not available, request timed out after 1004ms.
[error]         at com.zaxxer.hikari.pool.HikariPool.createTimeoutException(HikariPool.java:548)
[error]         at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:186)
[error]         at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:145)
[error]         at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:83)
[error]         at slick.jdbc.hikaricp.HikariCPJdbcDataSource.createConnection(HikariCPJdbcDataSource.scala:14)
[error]         at slick.jdbc.JdbcBackend$BaseSession.<init>(JdbcBackend.scala:453)
[error]         at slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:46)
[error]         at slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:37)
[error]         at slick.basic.BasicBackend$DatabaseDef.acquireSession(BasicBackend.scala:249)
[error]         at slick.basic.BasicBackend$DatabaseDef.acquireSession$(BasicBackend.scala:248)
[error]         at slick.jdbc.JdbcBackend$DatabaseDef.acquireSession(JdbcBackend.scala:37)
[error]         at slick.basic.BasicBackend$DatabaseDef$$anon$2.run(BasicBackend.scala:274)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
[error]         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[error]         at java.base/java.lang.Thread.run(Thread.java:844)
[error] Nonzero exit code: 1

也许是相关的，也很烦人，当我第二次(以及随后的(运行此代码时，我得到了以下错误：

Failed to get driver instance for jdbcUrl=jdbc:sqlserver://[...]

这迫使我每次杀死并重新装载sbt。

我做错了什么？值得注意的是：我可以使用类似valentina的软件中的相同凭据连接到数据库。

Answer 1

根据@MarkRotteveel的建议，并通过此链接，我找到了一个解决方案。

首先，我明确设置了驱动程序，添加了行

driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver"

在数据库字典中password = "somepassword"之后。

其次，默认超时(一秒钟后(对我来说似乎太短了，因此我添加了行connectionTimeout = "30 seconds"在前一个driver行之后仍然在db字典中。

现在它起作用了。