measure/src/main/scala/org/apache/griffin/measure/sink/SinkTaskRunner.scala

/*
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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.griffin.measure.sink

import java.util.Date
import java.util.concurrent.TimeUnit

import scala.concurrent._
import scala.concurrent.duration._
import scala.util.{Failure, Success}

import org.apache.griffin.measure.Loggable


/**
  * sink task runner, to sink metrics in block or non-block mode
  */
object SinkTaskRunner extends Loggable {

  import scala.concurrent.ExecutionContext.Implicits.global

  val MAX_RETRY = 100

  def addNonBlockTask(func: () => (Long, Future[_]), retry: Int): Unit = {
    val r = validRetryNum(retry)
    nonBlockExecute(func, r)
  }

  def addBlockTask(func: () => (Long, Future[_]), retry: Int, wait: Long): Unit = {
    val r = validRetryNum(retry)
    val duration = if (wait >= 0) Duration(wait, TimeUnit.MILLISECONDS) else Duration.Inf
    blockExecute(func, r, duration)
  }

  private def nonBlockExecute(func: () => (Long, Future[_]), retry: Int): Unit = {
    val nextRetry = nextRetryCount(retry)
    val st = new Date().getTime
    val (t, res) = func()
    res.onComplete {
      case Success(value) =>
        val et = new Date().getTime
        info(s"task ${t} success with (${value}) [ using time ${et - st} ms ]")

      case Failure(e) =>
        val et = new Date().getTime
        warn(s"task ${t} fails [ using time ${et - st} ms ] : ${e.getMessage}")
        if (nextRetry >= 0) {
          info(s"task ${t} retry [ rest retry count: ${nextRetry} ]")
          nonBlockExecute(func, nextRetry)
        } else {
          error(s"task fails: task ${t} retry ends but fails", e)
        }
    }
  }

  private def blockExecute(func: () => (Long, Future[_]),
                           retry: Int, waitDuration: Duration): Unit = {
    val nextRetry = nextRetryCount(retry)
    val st = new Date().getTime
    val (t, res) = func()
    try {
      val value = Await.result(res, waitDuration)
      val et = new Date().getTime
      info(s"task ${t} success with (${value}) [ using time ${et - st} ms ]")
    } catch {
      case e: Throwable =>
        val et = new Date().getTime
        warn(s"task ${t} fails [ using time ${et - st} ms ] : ${e.getMessage}")
        if (nextRetry >= 0) {
          info(s"task ${t} retry [ rest retry count: ${nextRetry} ]")
          blockExecute(func, nextRetry, waitDuration)
        } else {
          error(s"task fails: task ${t} retry ends but fails", e)
        }
    }
  }

  private def validRetryNum(retry: Int): Int = {
    if (retry > MAX_RETRY) MAX_RETRY else retry
  }
  private def nextRetryCount(retry: Int): Int = {
    if (retry >= 0) retry - 1 else -1
  }

}