scala source code of LocalStackReadyLogWaitStrategy

/*
 * Copyright 2018 Matthias Lüneberg
 *
 * Licensed 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 com.github.matsluni.akkahttpspi.testcontainers

import java.util.concurrent.{TimeUnit, TimeoutException}
import java.util.function.Predicate

import org.testcontainers.DockerClientFactory
import org.testcontainers.containers.ContainerLaunchException
import org.testcontainers.containers.output.{OutputFrame, WaitingConsumer}
import org.testcontainers.containers.wait.strategy.AbstractWaitStrategy
import org.testcontainers.utility.LogUtils

import scala.compat.java8.FunctionConverters._
/**
  * This strategy is based on the container log "Ready." from Localstack.
  * Once it's printed out, the container is good to go.
  */
object LocalStackReadyLogWaitStrategy extends AbstractWaitStrategy {
  override def waitUntilReady(): Unit = {
    val waitingConsumer = new WaitingConsumer
    LogUtils.followOutput(DockerClientFactory.instance.client, waitStrategyTarget.getContainerId, waitingConsumer)

    val waitPredicate: Predicate[OutputFrame] = ((outputFrame: OutputFrame) => outputFrame.getUtf8String.contains("Ready.")).asJava

    try
      waitingConsumer.waitUntil(waitPredicate, startupTimeout.getSeconds, TimeUnit.SECONDS, 1)
    catch {
      case e: TimeoutException =>
        throw new ContainerLaunchException("Timed out waiting for localstack")
    }
  }
}