val logConfigurationFile = System.getenv("PETCLINIC_HOME") + "/logback.xml"
val context: LoggerContext = LoggerFactory.getILoggerFactory.asInstanceOf[LoggerContext]
val jc: JoranConfigurator = new JoranConfigurator()
context.reset()
context.putProperty("application-name", "PetClinic")
jc.setContext(context)
jc.doConfigure(logConfigurationFile)

lazy val appPropertyFilePath = System.getenv("PETCLINIC_HOME") + "/app.properties"
lazy val properties: Properties = {
  val properties = new Properties()
  properties.load(new FileInputStream(appPropertyFilePath))
  properties
}

lazy val projectUrl: String = properties.getProperty("project.url")
lazy val projectEmail: String = properties.getProperty("project.email")
lazy val appUrl: String = properties.getProperty("app.url")
lazy val mysqlUsername: String = properties.getProperty("mysql.username")
lazy val mysqlPassword: String = properties.getProperty("mysql.password")
lazy val mysqlDatabaseName: String = properties.getProperty("mysql.database.name")
lazy val mysqlServerName: String = properties.getProperty("mysql.server.name")
lazy val mysqlCachePrepStmts: Boolean = properties.getProperty("mysql.cachePrepStmts").toBoolean
lazy val mysqlPrepStmtCacheSize: Int = properties.getProperty("mysql.prepStmtCacheSize").toInt
lazy val mysqlPrepStmtCacheSqlLimit: Int = properties.getProperty("mysql.prepStmtCacheSqlLimit").toInt
lazy val mysqlUseServerPrepStmts: Boolean = properties.getProperty("mysql.useServerPrepStmts").toBoolean
lazy val casUrl: String = properties.getProperty("cas.url")
lazy val casPort: Int = properties.getProperty("cas.port").toInt
lazy val casKeyspace: String = properties.getProperty("cas.keyspace")
lazy val hazelcastGroupName: String = properties.getProperty("hazelcast.group.name")
lazy val hazelcastGroupPassword: String = properties.getProperty("hazelcast.group.password")
lazy val hazelcastLoggingType: String = properties.getProperty("hazelcast.logging.type")
lazy val smtpUrl: String = properties.getProperty("smtp.url")
lazy val smtpPort: Int = properties.getProperty("smtp.port").toInt
lazy val smtpUserName: String = properties.getProperty("smtp.username")
lazy val smtpPassword: String = properties.getProperty("smtp.password")
lazy val smtpSslOnConnect: Boolean = properties.getProperty("smtp.sslonconnect").toBoolean
lazy val googleWebClientId: String = properties.getProperty("google.webclient.id")
lazy val googleWebClientSecret: String = properties.getProperty("google.clientweb.secret")
lazy val appEmail: String = properties.getProperty("app.email")
lazy val appName: String = properties.getProperty("app.name")

def initialize():Unit = {
  //TODO do initialization
}

def cleanup():Unit = {
  //TODO do cleanup
}

lazy val restApi = new RestApi(cassandraSession, eventBus, userApi, ownerApi, petApi, authenticationApi)
lazy val swaggerApiDocServlet = new SwaggerApiDocServlet(projectUrl, projectEmail)

override def init(context: ServletContext) {

  context.mount(restApi, "/api/*") // mount servlets
  context.mount(swaggerApiDocServlet, "/api-doc/*") // mount servlets
  initialize()
}

...