moebius for sql server

Moebius for SQL Server

Moebius for SQL Server is a powerful and flexible library that allows developers to interact with Microsoft SQL Server databases using Scala. It provides a simple and intuitive API for executing SQL queries and transactions, as well as handling connection pooling and resource management.

Connecting to a SQL Server database

To connect to a SQL Server database using Moebius, you need to provide the connection details such as the server name, database name, username, and password. Here's an example of how to establish a connection:

import com.github.mauricio.async.db._
import com.github.mauricio.async.db.postgresql._
import scala.concurrent._
import scala.concurrent.duration._

val configuration = Configuration(
  username = "myusername",
  password = "mypassword",
  database = "mydatabase",
  host = "localhost",
  port = 5432
)

val connectionPool = new ConnectionPool[PostgreSQLConnection](configuration)

val connection = Await.result(connectionPool.connect, 5.seconds)

Executing SQL queries

Once you have a connection, you can execute SQL queries using the sendQuery method. The result of a query is a QueryResult object that contains the query status and the result rows. Here's an example of executing a simple SELECT query:

import com.github.mauricio.async.db._
import com.github.mauricio.async.db.postgresql._
import scala.concurrent._
import scala.concurrent.duration._

val resultFuture = connection.sendQuery("SELECT * FROM users")

val result = Await.result(resultFuture, 5.seconds)

result.rows match {
  case Some(rows) => {
    for (row <- rows) {
      val id = row("id")
      val name = row("name")
      println(s"ID: $id, Name: $name")
    }
  }
  case None => println("No rows returned")
}

Transactions

Moebius also supports transactions using the inTransaction method. This allows you to execute a series of SQL statements as a single atomic operation. If an exception is thrown during the transaction, all changes made within the transaction will be rolled back. Here's an example:

import com.github.mauricio.async.db._
import com.github.mauricio.async.db.postgresql._
import scala.concurrent._
import scala.concurrent.duration._

val transactionFuture = connection.inTransaction { transaction =>
  val updateFuture = transaction.sendQuery("UPDATE users SET status = 'active' WHERE id = 1")
  updateFuture.flatMap { result =>
    val selectFuture = transaction.sendQuery("SELECT * FROM users WHERE id = 1")
    selectFuture.map { result =>
      result.rows match {
        case Some(rows) => {
          for (row <- rows) {
            val id = row("id")
            val name = row("name")
            val status = row("status")
            println(s"ID: $id, Name: $name, Status: $status")
          }
        }
        case None => println("No rows returned")
      }
    }
  }
}

val result = Await.result(transactionFuture, 5.seconds)

Conclusion

Moebius for SQL Server provides a convenient and efficient way to interact with SQL Server databases using Scala. It simplifies the process of connecting to a database, executing queries, and managing transactions. With its clean and intuitive API, developers can focus on writing business logic without worrying about low-level database operations. Whether you're building a small application or a large-scale enterprise system, Moebius for SQL Server is a valuable tool to have in your toolkit.

Reference: [Moebius for SQL Server](