xerial

case class User(name:String)

trait MyApi {
  // Binding http path parameters (e.g., :name) to method arguments
  @Endpoint(method = HttpMethod.GET, path = "/user/:name")
  def getUser(name: String): User = User(name)
}

xerial

trait DbService {
  private val connectionPool = bind[ConnectionPool]
    .onStart { dbConfig: DbConfig => startConnectionPool(dbConfig) }
    .onShutdown { _.close }

  def query(sql:String) = { connectionPool.execute(sql) ... }
}

xerial

import wvlet.airframe._

trait MyApp {
  private val threadPool = bind[ThreadPool]
  private val dbService = bind[DbService]
  ...
  threadPool.submit(dbService.query("select ..."))
}

xerial

import wvlet.airframe._

// Read configurations from a YAML file
val yaml = readConfig("config.yml") 
// Configure Application
val d = newDesign
  .bind[ServiceConfig].toInstance(new ServiceConfig(yaml.get(...), yaml.get(..))
  .bind[WebAppConfig].toInstance(new WebAppConfig(...))

// Initialize Services

xerial

// New Services
class WebApp(webAppConfig:WebAppConfig, component:WebComponent)
class WebComponent(service:Service)

// Pack configuration set in a class
case class ConfigSet(serviceConfig:ServiceConfig, webAppConfig:WebAppConfig)

// Read configurations from a YAML file
def readConfig: ConfigSet = {
  val yaml = readConfig("config.yml") 

xerial

case class ServiceConfig(host:String, port:Int)
class Service(config:ServiceConfig) {
  // ...
}
// Building a service instance
val config = new ServiceConfig("localhost", "8080")
val service = new Service(config)

xerial

logger.resetHandler(new LogRotationHandler(
    fileName = "your-app.log",
    maxNumberOfFiles = 100, // rotate up to 100 log files
    maxSizeInBytes = 100 * 1024 * 1024 // 100MB
    AppLogFormatter // Any log formatter you like
))

xerial

import org.scalatest._
import wvlet.log.LogFormatter.SourceCodeLogFormatter

trait Spec extends WordSpec with Matchers with LogSupport {
  override def run(testName: Option[String], args: Args): Status = {
    // Add source code location to the debug logs
    Logger.setDefaultFormatter(SourceCodeLogFormatter)

    // Periodically scan log level file
    Logger.scheduleLogLevelScan

xerial

import org.slf4j.Logger
import org.slf4j.LoggerFactory

object MyApp {
  val logger = LoggerFactory.getLogger(classOf[HelloWorld])
  logger.info("Hello World")
}

xerial

import wvlet.log.LogSupport

object MyApp extends LogSupport  {
  info("Hello airframe-log!")
  warn("This is a warning message")
  debug("debug messsages will not be shown by default")
}