commonTest.com.fraktalio.fmodel.application.examples.numbers.NumberEventSourcedAggregate.kt Maven / Gradle / Ivy

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/*
 * Copyright (c) 2021 Fraktalio D.O.O. All rights reserved.
 *
 * 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.fraktalio.fmodel.application.examples.numbers

import com.fraktalio.fmodel.application.EventRepository
import com.fraktalio.fmodel.application.eventSourcingOrchestratingAggregate
import com.fraktalio.fmodel.domain.Decider
import com.fraktalio.fmodel.domain.Saga
import com.fraktalio.fmodel.domain.combine
import com.fraktalio.fmodel.domain.examples.numbers.api.EvenNumberState
import com.fraktalio.fmodel.domain.examples.numbers.api.NumberCommand
import com.fraktalio.fmodel.domain.examples.numbers.api.NumberCommand.EvenNumberCommand
import com.fraktalio.fmodel.domain.examples.numbers.api.NumberCommand.OddNumberCommand
import com.fraktalio.fmodel.domain.examples.numbers.api.NumberEvent
import com.fraktalio.fmodel.domain.examples.numbers.api.NumberEvent.OddNumberEvent
import com.fraktalio.fmodel.domain.examples.numbers.api.OddNumberState


/**
 * Number aggregate
 *
 * It combines two already existing deciders into one that can handle ALL numbers (Even and Odd)
 *
 * @param evenNumberDecider the core domain logic algorithm for even numbers - pure declaration of our program logic
 * @param oddNumberDecider the core domain logic algorithm for odd numbers   - pure declaration of our program logic
 * @param repository the event-sourcing repository for all (even and odd) numbers
 * @return the event-sourcing aggregate instance for all (even and odd) numbers
 */
fun numberAggregate(
    evenNumberDecider: Decider,
    oddNumberDecider: Decider,
    evenNumberSaga: Saga,
    oddNumberSaga: Saga,
    repository: EventRepository
) =

    eventSourcingOrchestratingAggregate(
        decider = evenNumberDecider.combine(oddNumberDecider),
        eventRepository = repository,
        saga = evenNumberSaga.combine(oddNumberSaga)
    )