package io.ktor.server.engine

import java.util.concurrent.*

/**
 * Engine which runs an application
 */
interface ApplicationEngine {

    /**
     * Configuration for the [ApplicationEngine]
     */
    open class Configuration {
        /**
         * Provides currently available parallelism, e.g. number of available processors
         */
        val parallelism: Int = Runtime.getRuntime().availableProcessors()

        /**
         * Specifies size of the event group for accepting connections
         */
        var connectionGroupSize = parallelism / 2 + 1

        /**
         * Specifies size of the event group for processing connections, parsing messages and doing engine's internal work
         */
        var workerGroupSize = parallelism / 2 + 1

        /**
         * Specifies size of the event group for running application code
         */
        var callGroupSize = parallelism
    }

    /**
     * Environment with which this engine is running
     */
    val environment: ApplicationEngineEnvironment

    /**
     * Starts this [ApplicationEngine]
     *
     * @param wait if true, this function does not exit until application engine stops and exits
     * @return returns this instance
     */
    fun start(wait: Boolean = false): ApplicationEngine

    /**
     * Stops this [ApplicationEngine]
     *
     * @param gracePeriod the maximum amount of time in milliseconds to allow for activity to cool down
     * @param timeout the maximum amount of time to wait until server stops gracefully
     * @param timeUnit the [TimeUnit] for [timeout]
     */
    fun stop(gracePeriod: Long, timeout: Long, timeUnit: TimeUnit)
}


package io.ktor.server.engine

import java.util.concurrent.*

/**
 * Engine which runs an application
 */
interface ApplicationEngine {

    /**
     * Configuration for the [ApplicationEngine]
     */
    open class Configuration {
        /**
         * Provides currently available parallelism, e.g. number of available processors
         */
        val parallelism: Int = Runtime.getRuntime().availableProcessors()

        /**
         * Specifies size of the event group for accepting connections
         */
        var connectionGroupSize = parallelism / 2 + 1

        /**
         * Specifies size of the event group for processing connections, parsing messages and doing engine's internal work
         */
        var workerGroupSize = parallelism / 2 + 1

        /**
         * Specifies size of the event group for running application code
         */
        var callGroupSize = parallelism
    }

    /**
     * Environment with which this engine is running
     */
    val environment: ApplicationEngineEnvironment

    /**
     * Starts this [ApplicationEngine]
     *
     * @param wait if true, this function does not exit until application engine stops and exits
     * @return returns this instance
     */
    fun start(wait: Boolean = false): ApplicationEngine

    /**
     * Stops this [ApplicationEngine]
     *
     * @param gracePeriod the maximum amount of time for activity to cool down
     * @param timeout the maximum amount of time to wait until server stops gracefully
     * @param timeUnit the [TimeUnit] for [gracePeriod] and [timeout]
     */
    fun stop(gracePeriod: Long, timeout: Long, timeUnit: TimeUnit)
}


Fix documentation inaccuracy in stop()
Fix documentation inaccuracy in stop()

Fix error in documentation which wrongly claims that the gradePeriod is in millis. In reality both the gradeperiod and the timeout is applied to the timeUnit specified as the third argument.
If one specifies `stop(1_000, 20, TimeUnit.SECONDS)`an `java.lang.IllegalArgumentException: timeout: 20 (expected >= quietPeriod (1000))` is thrown.
ktorio/ktor,ktorio/ktor,ktorio/ktor,ktorio/ktor