fix(aws-elasticloadbalancingv2): listener dependency

packages/@aws-cdk/aws-elasticloadbalancingv2/lib/nlb/network-listener.ts

@@ -67,6 +67,7 @@ export class NetworkListener extends BaseListener implements INetworkListener {
  // New default target(s)
  for (const targetGroup of targetGroups) {
  this._addDefaultTargetGroup(targetGroup);
+ targetGroup.registerListener(this);
  }
  }
 

packages/@aws-cdk/aws-elasticloadbalancingv2/lib/nlb/network-target-group.ts

@@ -80,12 +80,22 @@ export class NetworkTargetGroup extends BaseTargetGroup {
  */
 // tslint:disable-next-line:no-empty-interface
 export interface INetworkTargetGroup extends ITargetGroup {
+ /**
+ * Register a listener that is load balancing to this target group.
+ *
+ * Don't call this directly. It will be called by listeners.
+ */
+ registerListener(listener: INetworkListener): void;
 }
 
 /**
  * An imported network target group
  */
 class ImportedNetworkTargetGroup extends BaseImportedTargetGroup implements INetworkTargetGroup {
+ public registerListener(_listener: INetworkListener) {
+ // Nothing to do, we know nothing of our members
+ }
+
  public listenerDependency(): cdk.IDependable {
  return new LazyDependable([]);
  }

packages/@aws-cdk/aws-elasticloadbalancingv2/test/nlb/test.listener.ts

@@ -1,4 +1,4 @@
-import { expect, haveResource } from '@aws-cdk/assert';
+import { expect, haveResource, MatchStyle } from '@aws-cdk/assert';
 import ec2 = require('@aws-cdk/aws-ec2');
 import cdk = require('@aws-cdk/cdk');
 import { Test } from 'nodeunit';
@@ -112,4 +112,34 @@ export = {
 
  test.done();
  },
+
+ 'Enable taking a dependency on an NLB target group\'s load balancer'(test: Test) {
+ // GIVEN
+ const stack = new cdk.Stack();
+ const vpc = new ec2.VpcNetwork(stack, 'Stack');
+ const lb = new elbv2.NetworkLoadBalancer(stack, 'LB', { vpc });
+ const listener = lb.addListener('Listener', { port: 443 });
+ const group = listener.addTargets('Group', {
+ port: 80,
+ targets: [new FakeSelfRegisteringTarget(stack, 'Target', vpc)]
+ });
+
+ // WHEN
+ const resource = new cdk.Resource(stack, 'MyResource', {
+ type: 'SomeResource',
+ });
+ resource.addDependency(group.listenerDependency());
+
+ // THEN
+ expect(stack).toMatch({
+ Resources: {
+ MyResource: {
+ Type: "SomeResource",
+ DependsOn: [ "LBListener49E825B4" ]
+ }
+ }
+ }, MatchStyle.SUPERSET);
+
+ test.done();
+ },
 };