I get the following error when connecting to my database:
" Caused by: org.postgresql.util.PSQLException: Something unusual has occurred to cause the driver to fail. Please report this exception."
package code.with.cal.timeronservicetutorial
import kotlinx.android.synthetic.main.activity_main.*
import java.sql.DriverManager
class ConnectionHelper {
fun ConnectDB() {
val jdbcUrl = "jdbc:postgresql://HOST/USER"
// get the connection
val connection = DriverManager.getConnection(jdbcUrl, "USER", "PW")
// prints true if the connection is valid
println(connection.isValid(0))
}
}
I suspect I didn't include the dependency of right version in my gradle, but i don't know how to find which driver version i have. I added this one:
implementation 'org.postgresql:postgresql:42.2.5'
Related
I am trying to connect to my local SQL Server with R2DBC, unfortunately, I do not know where I am going wrong, I have a lot of experience with R2DBC, I use it all the time with other databases but this is my first time with MSSQL, below is my MSSQL ConnectionFactorythat is failing:
#Bean
override fun connectionFactory(): ConnectionFactory {
val options = builder()
.option(DRIVER, "sqlserver")
.option(HOST, properties.host)
.option(PORT, properties.port.toInt())
.option(USER, properties.username)
.option(PASSWORD, properties.password)
.option(DATABASE, properties.database)
.option(SSL, false)
.build()
val connectionFactory = ConnectionFactories.get(options)
val configuration = ConnectionPoolConfiguration.builder(connectionFactory)
.maxIdleTime(Duration.ofMillis(1000))
.maxSize(20)
.build()
connectionPool = ConnectionPool(configuration)
return ProxyConnectionFactory.builder(connectionPool)
.build()
}
My properties
com:
#Application database
database:
host: PC_NAME\SQLEXPRESS
port: 51306
database: app_database
username: user
password: pass
When I run my application I get the error below:
09:02:40.151 [reactor-tcp-nio-1] DEBUG reactor.pool.SimpleDequePool - failed to warm up extra resource 9/9: java.net.UnknownHostException: Failed to resolve 'PC_NAME\SQLEXPRESS' after 4 queries
09:02:40.153 [parallel-2] ERROR reactor.core.publisher.Operators - Operator called default onErrorDropped
reactor.core.Exceptions$ErrorCallbackNotImplemented: org.springframework.transaction.CannotCreateTransactionException: Could not open R2DBC Connection for transaction; nested exception is java.net.UnknownHostException: Failed to resolve 'PC_NAME\SQLEXPRESS' after 4 queries
Caused by: org.springframework.transaction.CannotCreateTransactionException: Could not open R2DBC Connection for transaction; nested exception is java.net.UnknownHostException: Failed to resolve 'PC_NAME\SQLEXPRESS' after 4 queries
I do not understand where I am going wrong, I can confirm that I have enabled TCP and shown below
And enabled remote connection on my server instance
Does anyone know how this works?
I've been trying to connect to a Cloud SQL instance using HikariCP from App Engine locally so I can make queries. Every time I run App Engine using the ./gradlew appengineRun command, I get a java.net.SocketException: already connected error. This works fine when I deploy it to App Engine, but locally it just won't work. I'm stumped.
Here's the configuration for Hikari:
val config = HikariConfig().apply {
jdbcUrl = "jdbc:postgresql://google/[DB-NAME]"
username = "[USERNAME]"
password = "[PASSWORD]"
addDataSourceProperty("cloudSqlInstance", "[INSTANCE-CONNECTION-NAME")
addDataSourceProperty("socketFactory", "com.google.cloud.sql.postgres.SocketFactory")
}
private val dataSource = HikariDataSource(config)
private val connection = dataSource.connection
And then to execute the query:
connection.use { connection ->
connection.prepareCall("SELECT EXISTS(SELECT 1 FROM profiles WHERE username = '$username')").use { statement ->
statement.executeQuery().use { resultSet ->
try {
val exists = generateSequence {
if (resultSet.next()) resultSet.getBoolean(1) else null
}.toList()
onComplete(exists.any { it }, null)
} catch (e: Exception) {
onComplete(false, e)
}
}
}
}
I was certain this was the correct configuration to connect to SQL, but I keep getting this stacktrace:
Caused by: com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Failed to initialize pool: The connection attempt failed.
at com.zaxxer.hikari.pool.HikariPool.throwPoolInitializationException(HikariPool.java:597)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:576)
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
at appengine.sql.repository.ProfileRepository.<clinit>(ProfileRepository.kt:34)
... 48 more
Caused by: org.postgresql.util.PSQLException: The connection attempt failed.
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:262)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:67)
at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:216)
at org.postgresql.Driver.makeConnection(Driver.java:406)
at org.postgresql.Driver.connect(Driver.java:274)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:353)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:201)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:562)
... 51 more
Caused by: java.net.SocketException: already connected
at java.net.Socket.connect(Socket.java:569)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)
at org.postgresql.core.PGStream.<init>(PGStream.java:64)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:133)
... 60 more
Are the connection being properly closed after use? Is it possible the application is attempting to reuse connection after they have been closed by the SQL instance? I'd advise implementing a connection pool within the application for efficient use of connections to the db. Some CloudSQL documentation pages that may help cover these topics [1][2].
[1] https://cloud.google.com/sql/docs/mysql/manage-connections#opening_and_closing_connections
[2] https://cloud.google.com/sql/docs/mysql/diagnose-issues
I am new in Play Framework (Scala) and need some advise.
I use Scala 2.12 and Play Framework 2.6.20. I need to use several databases in my project. Right now I connected MySQL database as it says in documentation. How correctly connect project to remote Oracle 12g database?
application.conf:
db {
mysql.driver = com.mysql.cj.jdbc.Driver
mysql.url = "jdbc:mysql://host:port/database?characterEncoding=UTF-8"
mysql.username = "username"
mysql.password = "password"
}
First of all to lib folder I put ojdbc8.jar file from oracle website.
Then add libraryDependencies += "com.oracle" % "ojdbc8" % "12.1.0.1" code to sbt.build file. Finally I wrote settings to aplication.conf file.
After that step I notice error in terminal:
[error] (*:update) sbt.ResolveException: unresolved dependency: com.oracle#ojdbc8;12.1.0.1: not found
[error] Total time: 6 s, completed 10.11.2018 16:48:30
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256M; support was removed in 8.0
EDIT:
application.conf:
db {
mysql.driver = com.mysql.cj.jdbc.Driver
mysql.url = "jdbc:mysql://#host:#port/#database?characterEncoding=UTF-8"
mysql.username = "#username"
mysql.password = "#password"
oracle.driver = oracle.jdbc.driver.OracleDriver
oracle.url = "jdbc:oracle:thin:#host:#port/#sid"
oracle.username = "#username"
oracle.password = "#password"
}
ERROR:
play.api.UnexpectedException: Unexpected exception[CreationException: Unable to create injector, see the following errors:
1) No implementation for play.api.db.Database was bound.
while locating play.api.db.Database
for the 1st parameter of controllers.GetMarkersController.<init>(GetMarkersController.scala:14)
while locating controllers.GetMarkersController
for the 7th parameter of router.Routes.<init>(Routes.scala:45)
at play.api.inject.RoutesProvider$.bindingsFromConfiguration(BuiltinModule.scala:121):
Binding(class router.Routes to self) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1)
GetMarkersController.scala:
package controllers
import javax.inject._
import akka.actor.ActorSystem
import play.api.Configuration
import play.api.mvc.{AbstractController, ControllerComponents}
import play.api.libs.ws._
import scala.concurrent.duration._
import scala.concurrent.{ExecutionContext, Future, Promise}
import services._
import play.api.db.Database
class GetMarkersController #Inject()(db: Database, conf: Configuration, ws: WSClient, cc: ControllerComponents, actorSystem: ActorSystem)(implicit exec: ExecutionContext) extends AbstractController(cc) {
def getMarkersValues(start_date: String, end_date: String) = Action.async {
getValues(1.second, start_date: String, end_date: String).map {
message => Ok(message)
}
}
private def getValues(delayTime: FiniteDuration, start_date: String, end_date: String): Future[String] = {
val promise: Promise[String] = Promise[String]()
val service: GetMarkersService = new GetMarkersService(db)
actorSystem.scheduler.scheduleOnce(delayTime) {
promise.success(service.get_markers(start_date, end_date))
}(actorSystem.dispatcher)
promise.future
}
}
You cannot access Oracle without credentials. You need to have an account with Oracle. Then add something like the following to your build.sbt file
resolvers += "Oracle" at "https://maven.oracle.com"
credentials += Credentials("Oracle", "maven.oracle.com", "username", "password")
More information about accessing the OTN: https://docs.oracle.com/middleware/1213/core/MAVEN/config_maven_repo.htm#MAVEN9012
If you have the hard coded jar, you don't need to include as a dependency. See unmanagedDependencies https://www.scala-sbt.org/1.x/docs/Library-Dependencies.html
adapter.js file:
var procedure1Statement = WL.Server.createSQLStatement("select [sname] from [TestDb].[dbo].[studentinfo]");
function procedure1() {
return WL.Server.invokeSQLStatement({
preparedStatement : procedure1Statement,
parameters : []
});
}
adapter.xml file:
<dataSourceDefinition>
<driverClass>com.microsoft.sqlserver.jdbc.SQLServerDriver</driverClass>
<url>jdbc:sqlserver://localhost;databaseName=TestDb</url>
<user>user</user>
<password>pass</password>
</dataSourceDefinition>
getting error like this:
{
"errors": [
"Runtime: java.lang.ClassNotFoundException: Class com.microsoft.jdbc.sqlserver.SQLServerDriver not found in Worklight platform or project \/HelloWorld"
],
Read the error. Your error is that the driver is missing.
Make sure you have placed the jdbc driver in your-project\server\lib
Then make sure you are correctly pointing to the database in the XML file: IBM Worklight 6.1 - Failed connecting to MS SQL using SQL adapter
I'm trying to run a Groovy script to connect to Microsoft SQL Server within Jenkins and insert new data . I want to use the SQL Server driver and I placed the driver in Jenkins\war\WEB-INF\lib. I get an error when I Tried to run the following code in the build step - Execute Groovy Script:
import groovy.sql.Sql
import com.microsoft.sqlserver.jdbc.SQLServerDriver
class Connection {
def sqlConnection
def route = "xxxx"
def user = "xxxx"
def password = "xxxxx"
def driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver"
Connection(db){
this.route+=db.toString()
this.sqlConnection = Sql.newInstance( route, user, password, driver )
}
static main(args) {
Connection con = new Connection("nameDataBase")
}
}
The error is:
1 error org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
E:\Jenkins\workspace\pruebaDB\hudson1035758401251924782.groovy: 2:
unable to resolve class com.microsoft.sqlserver.jdbc.SQLServerDriver # line 2, column 1.
import com.microsoft.sqlserver.jdbc.SQLServerDriver`
The most evident case of such exception is that necessary class not yet in classpath during script execution.
During a which build step script is executed?
If my assumptions are right and you can't shift script execution time to the other build step (when all necessary classes/libs will be in the cp) try to use class loader.
Here is a few links which should help you with this:
class lodding fun
class loading in groovy