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https://github.com/blackglory/estore

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https://github.com/blackglory/estore

docker-image esm microservice nodejs typescript

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# EStore
提供以WebSocket为通讯协议的Event Store服务.

## Quickstart
```sh
docker run \
--detach \
--publish 8080:8080 \
blackglory/estore
```

## Install
### 从源代码运行
```sh
git clone https://github.com/BlackGlory/estore
cd estore
yarn install
yarn build
yarn bundle
yarn --silent start
```

### 从源代码构建
```sh
git clone https://github.com/BlackGlory/estore
cd estore
yarn install
yarn docker:build
```

### Recipes
#### docker-compose.yml
```yaml
version: '3.8'

services:
estore:
image: 'blackglory/estore'
restart: always
volumes:
- 'estore-data:/data'
ports:
- '8080:8080'

volumes:
estore-data:
```

## API
```ts
interface INamespaceStats {
items: number
}

interface IAPI {
getAllNamespaces(): string[]
getAllItemIds(namespace: string): string[]
getAllEvents(namespace: string, itemId: string): JSONValue[]

getNamespaceStats(namespace: string): INamespaceStats

clearItemsByNamespace(namespace: string): null

removeItem(namespace: string, itemId: string): null

/**
* 获得指定项目内包含的事件数量, 该值等同于下一个事件插入时的索引号.
* 对于不存在的项目, 它会返回0.
*/
getItemSize(namespace: string, itemId: string): number

/**
* @param nextEventIndex 如果指定, 则会在eventIndex不等于下一个index时抛出EventIndexConflict错误.
* @throws {EventIndexConflict}
*/
appendEvent(
namespace: string
, itemId: string
, event: JSONValue
, nextEventIndex?: number
): null

getEvent(
namespace: string
, itemId: string
, eventIndex: number
): JSONValue | null
}

class EventIndexConflict extends CustomError {}
```

## 环境变量
### `ESTORE_HOST`, `ESTORE_PORT`
通过环境变量`ESTORE_HOST`和`ESTORE_PORT`决定服务器监听的地址和端口,
默认值为`localhost`和`8080`.

### `ESTORE_WS_HEARTBEAT_INTERVAL`
通过环境变量`ESTORE_WS_HEARTBEAT_INTERVAL`可以设置WS心跳包(ping帧)的发送间隔, 单位为毫秒.
在默认情况下, 服务不会发送心跳包,
半开连接的检测依赖于服务端和客户端的运行平台的TCP Keepalive配置.

当`ESTORE_WS_HEARTBEAT_INTERVAL`大于零时,
服务会通过WS的ping帧按间隔发送心跳包.

## 客户端
- JavaScript/TypeScript(Node.js, Browser):