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https://github.com/Ahoo-Wang/Wow
Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing | 基于 DDD & EventSourcing 的现代响应式 CQRS 架构微服务开发框架
https://github.com/Ahoo-Wang/Wow
architecture axon cqrs ddd domain-driven-design elasticsearch event-driven event-sourcing high-performance java kafka kotlin microservice mongodb opentelemetry reactive-programming spring spring-boot webflux
Last synced: about 1 month ago
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Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing | 基于 DDD & EventSourcing 的现代响应式 CQRS 架构微服务开发框架
- Host: GitHub
- URL: https://github.com/Ahoo-Wang/Wow
- Owner: Ahoo-Wang
- License: apache-2.0
- Created: 2023-04-15T05:28:03.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-10-29T12:49:19.000Z (about 1 month ago)
- Last Synced: 2024-10-29T14:51:24.305Z (about 1 month ago)
- Topics: architecture, axon, cqrs, ddd, domain-driven-design, elasticsearch, event-driven, event-sourcing, high-performance, java, kafka, kotlin, microservice, mongodb, opentelemetry, reactive-programming, spring, spring-boot, webflux
- Language: Kotlin
- Homepage: https://wow.ahoo.me/
- Size: 19.3 MB
- Stars: 190
- Watchers: 7
- Forks: 23
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-kotlin - Wow - A Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing. (Libraries)
README
# Wow : Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing
> [中文文档](https://wow.ahoo.me/)
[](https://github.com/Ahoo-Wang/Wow/blob/mvp/LICENSE)
[](https://github.com/Ahoo-Wang/Wow/releases)
[](https://maven-badges.herokuapp.com/maven-central/me.ahoo.wow/wow-core)
[](https://app.codacy.com/gh/Ahoo-Wang/Wow/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
[](https://codecov.io/gh/Ahoo-Wang/Wow)
[](https://github.com/Ahoo-Wang/Wow)
[](https://github.com/KotlinBy/awesome-kotlin)
**Domain-Driven** | **Event-Driven** | **Test-Driven** | **Declarative-Design** | **Reactive Programming** | **Command Query Responsibility Segregation** | **Event Sourcing**
## Quick Start
Use [Wow Project Template](https://github.com/Ahoo-Wang/wow-project-template) to quickly create a DDD project based on the Wow framework.
## Features Overview
## Architecture
## Performance Test (Example)
- Test Code: [Example](./example)
- Test Case: Add To Shopping Cart / Create Order
- Command `WaitStrategy`: `SENT`、`PROCESSED`
### Deployment
- [Redis](deploy/example/perf/redis.yaml)
- [MongoDB](deploy/example/perf/mongo.yaml)
- [Kafka](deploy/example/perf/kafka.yaml)
- [Application-Config](deploy/example/perf/config/mongo_kafka_redis.yaml)
- [Application-Deployment](deploy/example/perf/deployment.yaml)
### Test Report
#### Add To Shopping Cart
- [Request](deploy/example/request/AddCartItem.http)
- [Detailed Report(PDF)-SENT](./document/example/perf/[email protected])
- [Detailed Report(PDF)-PROCESSED](./document/example/perf/[email protected])
> `WaitStrategy`:`SENT` Mode, The `AddCartItem` command write request API After 2 minutes of stress testing, the average TPS was *59625*, the peak was *82312*, and the average response time was *29* ms.
> `WaitStrategy`:`PROCESSED` Mode, The `AddCartItem` command write request API After 2 minutes of stress testing, the average TPS was *18696*, the peak was *24141*, and the average response time was *239* ms.
#### Create Order
- [Request](deploy/example/request/CreateOrder.http)
- [Detailed Report(PDF)-SENT](./document/example/perf/[email protected])
- [Detailed Report(PDF)-PROCESSED](./document/example/perf/[email protected])
> `WaitStrategy`:`SENT` Mode, The `CreateOrder` command write request API After 2 minutes of stress testing, the average TPS was *47838*, the peak was *86200*, and the average response time was *217* ms.
> `WaitStrategy`:`PROCESSED` Mode, The `CreateOrder` command write request API After 2 minutes of stress testing, the average TPS was *18230*, the peak was *25506*, and the average response time was *268* ms.
## Event Sourcing
## Observability
## OpenAPI (Spring WebFlux Integration)
> Automatically register the `Command` routing processing function (`HandlerFunction`), and developers only need to
> write the domain model to complete the service development.
## Test suite: 80%+ test coverage is very easy
> Given -> When -> Expect .
## Preconditions
- Understanding **Domain Driven Design**：《Implementing Domain-Driven Design》,《Domain-Driven Design: Tackling Complexity
in the Heart of Software》
- Understanding **Command Query Responsibility Segregation**(CQRS)
- Understanding **EventSourcing**
- Understanding **Reactive Programming**
### Order Service（Kotlin）
[Example-Order](./example)
### Transfer（JAVA）
[Example-Transfer](./example/transfer)
## Unit Test Suite
### 80%+ test coverage is very easy.
> Given -> When -> Expect .
### Aggregate Unit Test (`AggregateVerifier`)
[Aggregate Test](./example/example-domain/src/test/kotlin/me/ahoo/wow/example/domain/order/OrderTest.kt)
```kotlin
internal class OrderTest {
@Test
private fun createOrder() {
val tenantId = GlobalIdGenerator.generateAsString()
val customerId = GlobalIdGenerator.generateAsString()
val orderItem = OrderItem(
GlobalIdGenerator.generateAsString(),
GlobalIdGenerator.generateAsString(),
BigDecimal.valueOf(10),
10,
)
val orderItems = listOf(orderItem)
val inventoryService = object : InventoryService {
override fun getInventory(productId: String): Mono {
return orderItems.filter { it.productId == productId }.map { it.quantity }.first().toMono()
}
}
val pricingService = object : PricingService {
override fun getProductPrice(productId: String): Mono {
return orderItems.filter { it.productId == productId }.map { it.price }.first().toMono()
}
}
aggregateVerifier(tenantId = tenantId)
.inject(DefaultCreateOrderSpec(inventoryService, pricingService))
.given()
.`when`(CreateOrder(customerId, orderItems, SHIPPING_ADDRESS, false))
.expectEventCount(1)
.expectEventType(OrderCreated::class.java)
.expectStateAggregate {
assertThat(it.aggregateId.tenantId, equalTo(tenantId))
}
.expectState {
assertThat(it.id, notNullValue())
assertThat(it.customerId, equalTo(customerId))
assertThat(it.address, equalTo(SHIPPING_ADDRESS))
assertThat(it.items, equalTo(orderItems))
assertThat(it.status, equalTo(OrderStatus.CREATED))
}
.verify()
}
@Test
fun createOrderGivenEmptyItems() {
val customerId = GlobalIdGenerator.generateAsString()
aggregateVerifier()
.inject(mockk(), "createOrderSpec")
.given()
.`when`(CreateOrder(customerId, listOf(), SHIPPING_ADDRESS, false))
.expectErrorType(IllegalArgumentException::class.java)
.expectStateAggregate {
/*
* 该聚合对象处于未初始化状态，即该聚合未创建成功.
*/
assertThat(it.initialized, equalTo(false))
}.verify()
}
/**
* 创建订单-库存不足
*/
@Test
fun createOrderWhenInventoryShortage() {
val customerId = GlobalIdGenerator.generateAsString()
val orderItem = OrderItem(
GlobalIdGenerator.generateAsString(),
GlobalIdGenerator.generateAsString(),
BigDecimal.valueOf(10),
10,
)
val orderItems = listOf(orderItem)
val inventoryService = object : InventoryService {
override fun getInventory(productId: String): Mono {
return orderItems.filter { it.productId == productId }
/*
* 模拟库存不足
*/
.map { it.quantity - 1 }.first().toMono()
}
}
val pricingService = object : PricingService {
override fun getProductPrice(productId: String): Mono {
return orderItems.filter { it.productId == productId }.map { it.price }.first().toMono()
}
}
aggregateVerifier()
.inject(DefaultCreateOrderSpec(inventoryService, pricingService))
.given()
.`when`(CreateOrder(customerId, orderItems, SHIPPING_ADDRESS, false))
/*
* 期望：库存不足异常.
*/
.expectErrorType(InventoryShortageException::class.java)
.expectStateAggregate {
/*
* 该聚合对象处于未初始化状态，即该聚合未创建成功.
*/
assertThat(it.initialized, equalTo(false))
}.verify()
}
}
```
### Saga Unit Test (`SagaVerifier`)
[Saga Test](./example/example-domain/src/test/kotlin/me/ahoo/wow/example/domain/cart/CartSagaTest.kt)
```kotlin
class CartSagaTest {
@Test
fun onOrderCreated() {
val orderItem = OrderItem(
GlobalIdGenerator.generateAsString(),
GlobalIdGenerator.generateAsString(),
BigDecimal.valueOf(10),
10,
)
sagaVerifier()
.`when`(
mockk {
every {
customerId
} returns "customerId"
every {
items
} returns listOf(orderItem)
every {
fromCart
} returns true
},
)
.expectCommandBody {
assertThat(it.id, equalTo("customerId"))
assertThat(it.productIds, hasSize(1))
assertThat(it.productIds.first(), equalTo(orderItem.productId))
}
.verify()
}
}
```
## Design
### Modeling
| **Single Class** | **Inheritance Pattern** | **Aggregation Pattern** |
|----------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------|:--------------------------------------------------------------------------------------------|
|  |  |  |
### Load Aggregate
### Aggregate State Flow
### Send Command
### Command And Event Flow
## Event Compensation
### Use Case
### Execution Sequence Diagram
### Dashboard
