/
virtual-router.ts
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/
virtual-router.ts
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import * as cdk from '@aws-cdk/core';
import { CfnVirtualRouter } from './appmesh.generated';
import { IMesh, Mesh } from './mesh';
import { Route, RouteBaseProps } from './route';
import { PortMapping, Protocol } from './shared-interfaces';
/**
* Interface which all VirtualRouter based classes MUST implement
*/
export interface IVirtualRouter extends cdk.IResource {
/**
* The name of the VirtualRouter
*
* @attribute
*/
readonly virtualRouterName: string;
/**
* The Amazon Resource Name (ARN) for the VirtualRouter
*
* @attribute
*/
readonly virtualRouterArn: string;
/**
* The service mesh that the virtual router resides in
*/
readonly mesh: IMesh;
/**
* Add a single route to the router
*/
addRoute(id: string, props: RouteBaseProps): Route;
}
/**
* Interface with base properties all routers willl inherit
*/
export interface VirtualRouterBaseProps {
/**
* Listener specification for the virtual router
*
* @default - A listener on HTTP port 8080
*/
readonly listener?: Listener;
/**
* The name of the VirtualRouter
*
* @default - A name is automatically determined
*/
readonly virtualRouterName?: string;
}
/**
* A single listener for
*/
export interface Listener {
/**
* Listener port for the virtual router
*/
readonly portMapping: PortMapping;
}
abstract class VirtualRouterBase extends cdk.Resource implements IVirtualRouter {
/**
* The name of the VirtualRouter
*/
public abstract readonly virtualRouterName: string;
/**
* The Amazon Resource Name (ARN) for the VirtualRouter
*/
public abstract readonly virtualRouterArn: string;
/**
* The AppMesh mesh the VirtualRouter belongs to
*/
public abstract readonly mesh: IMesh;
/**
* Add a single route to the router
*/
public addRoute(id: string, props: RouteBaseProps): Route {
const route = new Route(this, id, {
...props,
routeName: id,
mesh: this.mesh,
virtualRouter: this,
});
return route;
}
}
/**
* The properties used when creating a new VritualRouter
*/
export interface VirtualRouterProps extends VirtualRouterBaseProps {
/**
* The AppMesh mesh the VirtualRouter belongs to
*/
readonly mesh: IMesh;
}
export class VirtualRouter extends VirtualRouterBase {
/**
* Import an existing VirtualRouter given an ARN
*/
public static fromVirtualRouterArn(scope: cdk.Construct, id: string, virtualRouterArn: string): IVirtualRouter {
return new ImportedVirtualRouter(scope, id, { virtualRouterArn });
}
/**
* Import an existing VirtualRouter given names
*/
public static fromVirtualRouterName(scope: cdk.Construct, id: string, meshName: string, virtualRouterName: string): IVirtualRouter {
return new ImportedVirtualRouter(scope, id, { meshName, virtualRouterName });
}
/**
* Import an existing virtual router given attributes
*/
public static fromVirtualRouterAttributes(scope: cdk.Construct, id: string, attrs: VirtualRouterAttributes): IVirtualRouter {
return new ImportedVirtualRouter(scope, id, attrs);
}
/**
* The name of the VirtualRouter
*/
public readonly virtualRouterName: string;
/**
* The Amazon Resource Name (ARN) for the VirtualRouter
*/
public readonly virtualRouterArn: string;
/**
* The AppMesh mesh the VirtualRouter belongs to
*/
public readonly mesh: IMesh;
private readonly listeners = new Array<CfnVirtualRouter.VirtualRouterListenerProperty>();
constructor(scope: cdk.Construct, id: string, props: VirtualRouterProps) {
super(scope, id, {
physicalName: props.virtualRouterName || cdk.Lazy.stringValue({ produce: () => this.node.uniqueId }),
});
this.mesh = props.mesh;
this.addListener(props.listener || { portMapping: { port: 8080, protocol: Protocol.HTTP }});
const router = new CfnVirtualRouter(this, 'Resource', {
virtualRouterName: this.physicalName,
meshName: this.mesh.meshName,
spec: {
listeners: this.listeners,
},
});
this.virtualRouterName = this.getResourceNameAttribute(router.attrVirtualRouterName);
this.virtualRouterArn = this.getResourceArnAttribute(router.ref, {
service: 'appmesh',
resource: `mesh/${props.mesh.meshName}/virtualRouter`,
resourceName: this.physicalName,
});
}
/**
* Add port mappings to the router
*/
private addListener(listener: Listener) {
this.listeners.push({
portMapping: listener.portMapping,
});
}
}
/**
* Interface with properties ncecessary to import a reusable VirtualRouter
*/
export interface VirtualRouterAttributes {
/**
* The name of the VirtualRouter
*/
readonly virtualRouterName?: string;
/**
* The Amazon Resource Name (ARN) for the VirtualRouter
*/
readonly virtualRouterArn?: string;
/**
* The AppMesh mesh the VirtualRouter belongs to
*/
readonly mesh?: IMesh;
/**
* The name of the AppMesh mesh the VirtualRouter belongs to
*/
readonly meshName?: string;
}
/**
* Used to import a VirtualRouter and perform actions or read properties from
*/
class ImportedVirtualRouter extends VirtualRouterBase {
/**
* The name of the VirtualRouter
*/
public readonly virtualRouterName: string;
/**
* The Amazon Resource Name (ARN) for the VirtualRouter
*/
public readonly virtualRouterArn: string;
private _mesh?: IMesh;
constructor(scope: cdk.Construct, id: string, props: VirtualRouterAttributes) {
super(scope, id);
if (props.mesh) {
this._mesh = props.mesh;
}
if (props.meshName) {
if (props.mesh) {
throw new Error('Supply either \'mesh\' or \'meshName\', but not both');
}
this._mesh = Mesh.fromMeshName(this, 'Mesh', props.meshName);
}
if (props.virtualRouterArn) {
this.virtualRouterArn = props.virtualRouterArn;
this.virtualRouterName = cdk.Fn.select(2, cdk.Fn.split('/', cdk.Stack.of(scope).parseArn(props.virtualRouterArn).resourceName!));
} else if (props.virtualRouterName && props.meshName) {
this.virtualRouterName = props.virtualRouterName;
this.virtualRouterArn = cdk.Stack.of(this).formatArn({
service: 'appmesh',
resource: `mesh/${props.meshName}/virtualRouter`,
resourceName: this.virtualRouterName,
});
} else {
throw new Error('Need either arn or both names');
}
}
/**
* The AppMesh mesh the VirtualRouter belongs to
*/
public get mesh(): IMesh {
if (!this._mesh) {
throw new Error('Please supply either \'mesh\' or \'meshName\' when calling \'fromVirtualRouterAttributes\'');
}
return this._mesh;
}
}