core/src/main/scala/org/apache/gearpump/cluster/main/Info.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.cluster.main

import org.apache.gearpump.cluster.MasterToAppMaster.AppMastersData
import org.apache.gearpump.cluster.client.ClientContext
import org.apache.gearpump.util.MasterClientCommand

/** Tool to query master info */
object Info extends MasterClientCommand with ArgumentsParser {

  override val options: Array[(String, CLIOption[Any])] = Array(
    // For document purpose only, OPTION_CONFIG option is not used here.
    // OPTION_CONFIG is parsed by parent shell command "Gear" transparently.
    Gear.OPTION_CONFIG -> CLIOption("custom configuration file", required = false,
      defaultValue = None))

  override val description = "Query the Application list"

  // scalastyle:off println
  def main(akkaConf: Config, args: Array[String]): Unit = {
    val client = ClientContext(akkaConf)

    val AppMastersData(appMasters) = client.listApps
    Console.println("== Application Information ==")
    Console.println("====================================")
    appMasters.foreach { appData =>
      Console.println(s"application: ${appData.appId}, name: ${appData.appName}, " +
        s"status: ${appData.status}, worker: ${appData.workerPath}")
    }
    client.close()
  }
  // scalastyle:on println
}