feat(cloudwatch): added defaultInterval prop to cw-dashboard

packages/@aws-cdk/aws-cloudwatch/README.md

@@ -697,3 +697,18 @@ new cloudwatch.Row(widgetA, widgetB);
 
 You can add a widget after object instantiation with the method
 `addWidget()`.
+
+### Interval duration for dashboard
+
+Interval duration for metrics in dashboard. You can specify `defaultInterval` with
+the relative time(eg. 7 days) as `cdk.Duration.days(7)`.
+
+```ts
+import * as cw from '@aws-cdk/aws-cloudwatch';
+
+const dashboard = new cw.Dashboard(stack, 'Dash', {
+  defaultInterval: cdk.Duration.days(7),
+});
+```
+
+Here, the dashboard would show the metrics for the last 7 days.

packages/@aws-cdk/aws-cloudwatch/lib/dashboard.ts

@@ -1,4 +1,4 @@
-import { Lazy, Resource, Stack, Token, Annotations } from '@aws-cdk/core';
+import { Lazy, Resource, Stack, Token, Annotations, Duration } from '@aws-cdk/core';
 import { Construct } from 'constructs';
 import { CfnDashboard } from './cloudwatch.generated';
 import { Column, Row } from './layout';
@@ -31,6 +31,14 @@ export interface DashboardProps {
    */
   readonly dashboardName?: string;
 
+  /**
+   * Interval duration for metrics.
+   * You can specify defaultInterval with the relative time(eg. cdk.Duration.days(7)).
+   *
+   * @default When the dashboard loads, the defaultInterval time will be the default time range.
+   */
+  readonly defaultInterval?: Duration
+
   /**
    * The start of the time range to use for each widget on the dashboard.
    * You can specify start without specifying end to specify a relative time range that ends with the current time.
@@ -107,15 +115,19 @@ export class Dashboard extends Resource {
       }
     }
 
+    if (props.start !== undefined && props.defaultInterval !== undefined) {
+      throw ('both properties defaultInterval and start cannot be set at once');
+    }
+
     const dashboard = new CfnDashboard(this, 'Resource', {
       dashboardName: this.physicalName,
       dashboardBody: Lazy.string({
         produce: () => {
           const column = new Column(...this.rows);
           column.position(0, 0);
           return Stack.of(this).toJsonString({
-            start: props.start,
-            end: props.end,
+            start: props.defaultInterval !== undefined ? `-${props.defaultInterval?.toIsoString()}` : props.start,
+            end: props.defaultInterval !== undefined ? undefined : props.end,
             periodOverride: props.periodOverride,
             widgets: column.toJson(),
           });

packages/@aws-cdk/aws-cloudwatch/test/dashboard.test.ts

@@ -1,5 +1,5 @@
 import { Template, Annotations, Match } from '@aws-cdk/assertions';
-import { App, Stack } from '@aws-cdk/core';
+import { App, Duration, Stack } from '@aws-cdk/core';
 import { Dashboard, GraphWidget, PeriodOverride, TextWidget, MathExpression, TextWidgetBackground } from '../lib';
 
 describe('Dashboard', () => {
@@ -131,6 +131,31 @@ describe('Dashboard', () => {
 
   });
 
+  test('defaultInterval test', () => {
+    // GIVEN
+    const stack = new Stack();
+    // WHEN
+    const dashboard = new Dashboard(stack, 'Dash', {
+      defaultInterval: Duration.days(7),
+    });
+    dashboard.addWidgets(
+      new GraphWidget({ width: 1, height: 1 }), // GraphWidget has internal reference to current region
+    );
+
+    // THEN
+    Template.fromStack(stack).hasResourceProperties('AWS::CloudWatch::Dashboard', {
+      DashboardBody: {
+        'Fn::Join': ['', [
+          '{"start":"-P7D",\
+"widgets":[{"type":"metric","width":1,"height":1,"x":0,"y":0,"properties":{"view":"timeSeries","region":"',
+          { Ref: 'AWS::Region' },
+          '","yAxis":{}}}]}',
+        ]],
+      },
+    });
+
+  });
+
   test('DashboardName is set when provided', () => {
     // GIVEN
     const app = new App();

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/DashboardIntegrationTestDefaultTestDeployAssert5BE38902.assets.json

@@ -1,5 +1,5 @@
 {
-  "version": "30.0.0",
+  "version": "31.0.0",
   "files": {
     "21fbb51d7b23f6a6c262b46a9caee79d744a3ac019fd45422d988b96d44b2a22": {
       "source": {

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/DashboardIntegrationTestStack.assets.json

@@ -1,15 +1,15 @@
 {
-  "version": "30.0.0",
+  "version": "31.0.0",
   "files": {
-    "53eb5ec97b9df3953bc84bdc2aee87ace7b502c665b7e5b9f7b7d14dd46cea69": {
+    "1a70f8470c838c02020b9010528363b17eebd55d55c1a53fb3e0f6760a606c98": {
       "source": {
         "path": "DashboardIntegrationTestStack.template.json",
         "packaging": "file"
       },
       "destinations": {
         "current_account-current_region": {
           "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
-          "objectKey": "53eb5ec97b9df3953bc84bdc2aee87ace7b502c665b7e5b9f7b7d14dd46cea69.json",
+          "objectKey": "1a70f8470c838c02020b9010528363b17eebd55d55c1a53fb3e0f6760a606c98.json",
           "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
         }
       }

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/DashboardIntegrationTestStack.template.json

@@ -3,7 +3,7 @@
   "DashCCD7F836": {
    "Type": "AWS::CloudWatch::Dashboard",
    "Properties": {
-    "DashboardBody": "{\"widgets\":[{\"type\":\"text\",\"width\":6,\"height\":2,\"x\":0,\"y\":0,\"properties\":{\"markdown\":\"I don't have a background\",\"background\":\"transparent\"}}]}"
+    "DashboardBody": "{\"start\":\"-P7D\",\"widgets\":[{\"type\":\"text\",\"width\":6,\"height\":2,\"x\":0,\"y\":0,\"properties\":{\"markdown\":\"I don't have a background\",\"background\":\"transparent\"}}]}"
    }
   }
  },

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/cdk.out

@@ -1 +1 @@
-{"version":"30.0.0"}
+{"version":"31.0.0"}

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/integ.json

@@ -1,5 +1,5 @@
 {
-  "version": "30.0.0",
+  "version": "31.0.0",
   "testCases": {
     "DashboardIntegrationTest/DefaultTest": {
       "stacks": [

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/manifest.json

@@ -1,5 +1,5 @@
 {
-  "version": "30.0.0",
+  "version": "31.0.0",
   "artifacts": {
     "DashboardIntegrationTestStack.assets": {
       "type": "cdk:asset-manifest",
@@ -17,7 +17,7 @@
         "validateOnSynth": false,
         "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-deploy-role-${AWS::AccountId}-${AWS::Region}",
         "cloudFormationExecutionRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-cfn-exec-role-${AWS::AccountId}-${AWS::Region}",
-        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/53eb5ec97b9df3953bc84bdc2aee87ace7b502c665b7e5b9f7b7d14dd46cea69.json",
+        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/1a70f8470c838c02020b9010528363b17eebd55d55c1a53fb3e0f6760a606c98.json",
         "requiresBootstrapStackVersion": 6,
         "bootstrapStackVersionSsmParameter": "/cdk-bootstrap/hnb659fds/version",
         "additionalDependencies": [

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.js.snapshot/tree.json

@@ -18,7 +18,7 @@
                 "attributes": {
                   "aws:cdk:cloudformation:type": "AWS::CloudWatch::Dashboard",
                   "aws:cdk:cloudformation:props": {
-                    "dashboardBody": "{\"widgets\":[{\"type\":\"text\",\"width\":6,\"height\":2,\"x\":0,\"y\":0,\"properties\":{\"markdown\":\"I don't have a background\",\"background\":\"transparent\"}}]}"
+                    "dashboardBody": "{\"start\":\"-P7D\",\"widgets\":[{\"type\":\"text\",\"width\":6,\"height\":2,\"x\":0,\"y\":0,\"properties\":{\"markdown\":\"I don't have a background\",\"background\":\"transparent\"}}]}"
                   }
                 },
                 "constructInfo": {
@@ -75,7 +75,7 @@
                 "path": "DashboardIntegrationTest/DefaultTest/Default",
                 "constructInfo": {
                   "fqn": "constructs.Construct",
-                  "version": "10.1.252"
+                  "version": "10.1.270"
                 }
               },
               "DeployAssert": {
@@ -121,7 +121,7 @@
         "path": "Tree",
         "constructInfo": {
           "fqn": "constructs.Construct",
-          "version": "10.1.252"
+          "version": "10.1.270"
         }
       }
     },

packages/@aws-cdk/aws-cloudwatch/test/integ.dashboard.ts

@@ -7,7 +7,9 @@ const app = new cdk.App();
 
 const stack = new cdk.Stack(app, 'DashboardIntegrationTestStack');
 
-const dashboard = new cloudwatch.Dashboard(stack, 'Dash');
+const dashboard = new cloudwatch.Dashboard(stack, 'Dash', {
+  defaultInterval: cdk.Duration.days(7),
+});
 
 dashboard.addWidgets(new cloudwatch.TextWidget({
   markdown: 'I don\'t have a background',