wvlet.airframe.lifecycle.LifeCycleHook.scala Maven / Gradle / Ivy
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Dependency injection library tailored to Scala
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/*
* 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 wvlet.airframe.lifecycle
import wvlet.airframe.surface.Surface
import wvlet.log.LogSupport
class Injectee(val surface: Surface, val injectee: Any) {
def canEqual(other: Any): Boolean = other.isInstanceOf[Injectee]
override def equals(other: Any): Boolean =
other match {
case that: Injectee =>
(that canEqual this) &&
surface == that.surface &&
injectee == that.injectee
case _ => false
}
override def hashCode(): Int = {
val h = 31 * surface.hashCode() + (if (injectee != null) injectee.hashCode() else 0)
h
}
}
trait LifeCycleHook {
def surface: Surface = injectee.surface
def execute: Unit
def injectee: Injectee
}
object EventHookHolder {
def apply[A](surface: Surface, injectee: A, hook: A => Any): EventHookHolder[A] = {
EventHookHolder(new Injectee(surface, injectee), hook)
}
}
case class EventHookHolder[A](injectee: Injectee, hook: A => Any) extends LifeCycleHook with LogSupport {
override def toString: String = s"hook for [$surface]"
def execute: Unit = {
hook(injectee.injectee.asInstanceOf[A])
}
}
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