# Backend

Contains static factory methods to create backends.

- Source: [`aws-appmesh/lib/shared-interfaces.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-appmesh/lib/shared-interfaces.ts#L295)

## Example

```ts
declare const mesh: appmesh.Mesh;
declare const router: appmesh.VirtualRouter;
declare const service: cloudmap.Service;

const node = new appmesh.VirtualNode(this, 'node', {
  mesh,
  serviceDiscovery: appmesh.ServiceDiscovery.cloudMap(service),
  listeners: [appmesh.VirtualNodeListener.http({
    port: 8080,
    healthCheck: appmesh.HealthCheck.http({
      healthyThreshold: 3,
      interval: Duration.seconds(5),
      path: '/ping',
      timeout: Duration.seconds(2),
      unhealthyThreshold: 2,
    }),
    timeout: {
      idle: Duration.seconds(5),
    },
  })],
  accessLog: appmesh.AccessLog.fromFilePath('/dev/stdout'),
});

const virtualService = new appmesh.VirtualService(this, 'service-1', {
  virtualServiceProvider: appmesh.VirtualServiceProvider.virtualRouter(router),
  virtualServiceName: 'service1.domain.local',
});

node.addBackend(appmesh.Backend.virtualService(virtualService));
```

## Initializer

```ts
new Backend()
```

## Methods

- `bind(_scope: Construct): BackendConfig` — Return backend config.

- `virtualService(virtualService: IVirtualService, props?: VirtualServiceBackendOptions): Backend // chainable` (static) — Construct a Virtual Service backend.