core/src/main/scala/org/apache/gearpump/util/AkkaApp.scala

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.gearpump.util

import scala.util.Try

import org.apache.gearpump.cluster.ClusterConfig

/**
 * A Main class helper to load Akka configuration automatically.
 */
trait AkkaApp {

  type Config = com.typesafe.config.Config

  def main(akkaConf: Config, args: Array[String]): Unit

  def help(): Unit

  protected def akkaConfig: Config = {
    ClusterConfig.default()
  }

  def main(args: Array[String]): Unit = {
    Try {
      main(akkaConfig, args)
    }.failed.foreach { ex => help(); throw ex }
  }
}