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feat(location): support RouteCalculator #30682

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Aug 30, 2024
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25 changes: 25 additions & 0 deletions packages/@aws-cdk/aws-location-alpha/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -49,3 +49,28 @@ declare const role: iam.Role;
const placeIndex = new location.PlaceIndex(this, 'PlaceIndex');
placeIndex.grantSearch(role);
```

## Route Calculator

Route calculator resources allow you to find routes and estimate travel time based on up-to-date road network and live traffic information from your chosen data provider.

For more information, see [Routes](https://docs.aws.amazon.com/location/latest/developerguide/route-concepts.html).

To create a route calculator, define a `RouteCalculator`:

```ts
new location.RouteCalculator(this, 'RouteCalculator', {
routeCalculatorName: 'MyRouteCalculator', // optional, defaults to a generated name
dataSource: location.DataSource.HERE, // optional, defaults to Esri
});
```

Use the `grant()` or `grantRead()` method to grant the given identity permissions to perform actions
on the route calculator:

```ts
declare const role: iam.Role;

const routeCalculator = new location.RouteCalculator(this, 'RouteCalculator');
routeCalculator.grantRead(role);
```
1 change: 1 addition & 0 deletions packages/@aws-cdk/aws-location-alpha/lib/index.ts
Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
export * from './place-index';
export * from './route-calculator';

// AWS::Location CloudFormation Resources:
7 changes: 7 additions & 0 deletions packages/@aws-cdk/aws-location-alpha/lib/place-index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,13 @@ export enum DataSource {
*/
ESRI = 'Esri',

/**
* Grab provides routing functionality for Southeast Asia.
*
* @see https://docs.aws.amazon.com/location/latest/developerguide/grab.html
*/
GRAB = 'Grab',

/**
* HERE
*
Expand Down
166 changes: 166 additions & 0 deletions packages/@aws-cdk/aws-location-alpha/lib/route-calculator.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,166 @@
import * as iam from 'aws-cdk-lib/aws-iam';
import { ArnFormat, IResource, Lazy, Resource, Stack, Token } from 'aws-cdk-lib/core';
import { Construct } from 'constructs';
import { CfnRouteCalculator } from 'aws-cdk-lib/aws-location';
import { DataSource } from './place-index';
import { generateUniqueId } from './util';

/**
* A Route Calculator
*/
export interface IRouteCalculator extends IResource {
/**
* The name of the route calculator
*
* @attribute
*/
readonly routeCalculatorName: string;

/**
* The Amazon Resource Name (ARN) of the route calculator resource
*
* @attribute Arn,CalculatorArn
*/
readonly routeCalculatorArn: string;
}

/**
* Properties for a route calculator
*/
export interface RouteCalculatorProps {
/**
* A name for the route calculator
*
* Must be between 1 and 100 characters and contain only alphanumeric characters,
* hyphens, periods and underscores.
*
* @default - A name is automatically generated
*/
readonly routeCalculatorName?: string;

/**
* Data source for the route calculator
*
* @default DataSource.ESRI
*/
readonly dataSource?: DataSource;
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@mazyu36 mazyu36 Jun 27, 2024

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Currently, the DataSource for PlaceIndex and RouteCalculator are identical.
Therefore, I decided to reference the DataSource of PlaceIndex.
However, if there's a better approach, please share your opinion.

Ref:

I also considered defining a completely separate Enum like RouteDataSource, but decided against it as I thought it would be redundant.
I also thought about moving PlaceIndex's DataSource to a separate file, but I think it would result in breaking changes...

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Agree. Let's see if the core team has a different opinion.

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I see in another PR of yours that you added a util file. I think it would be nice to move PlaceIndex's DataSource to somewhere more generic. Based on the CFN documentation, https://docs.aws.amazon.com/location/latest/developerguide/what-is-data-provider.html, it seems that all these three resources should re-use the DataSource prop.

but I think it would result in breaking changes
I don't see why this would be a breaking change. Can you explain that to me please?

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Sorry, I misunderstood the breaking change. Although I needed to fix unit test within the package, it doesn't actually affect the usage of the package.

I've moved the DataSource to the util module.


/**
* A description for the route calculator
*
* @default - no description
*/
readonly description?: string;
}

abstract class RouteCalculatorBase extends Resource implements IRouteCalculator {
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Same comment to another PR, don't think Base construct class is needed.

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@mazyu36 mazyu36 Aug 29, 2024

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Thanks. I've removed base class.

public abstract readonly routeCalculatorName: string;
public abstract readonly routeCalculatorArn: string;

/**
* Grant the given principal identity permissions to perform the actions on this route calculator.
*/
public grant(grantee: iam.IGrantable, ...actions: string[]): iam.Grant {
return iam.Grant.addToPrincipal({
grantee: grantee,
actions: actions,
resourceArns: [this.routeCalculatorArn],
});
}

/**
* Grant the given identity permissions to access to a route calculator resource to calculate a route.
*
* @see https://docs.aws.amazon.com/location/latest/developerguide/security_iam_id-based-policy-examples.html#security_iam_id-based-policy-examples-calculate-route
*/
public grantRead(grantee: iam.IGrantable): iam.Grant {
return this.grant(grantee,
'geo:CalculateRoute',
);
}
}

/**
* A Route Calculator
*
* @see https://docs.aws.amazon.com/location/latest/developerguide/places-concepts.html
*/
export class RouteCalculator extends RouteCalculatorBase {
/**
* Use an existing route calculator by name
*/
public static fromRouteCalculatorName(scope: Construct, id: string, routeCalculatorName: string): IRouteCalculator {
const routeCalculatorArn = Stack.of(scope).formatArn({
service: 'geo',
resource: 'route-calculator',
resourceName: routeCalculatorName,
});

return RouteCalculator.fromRouteCalculatorArn(scope, id, routeCalculatorArn);
}

/**
* Use an existing route calculator by ARN
*/
public static fromRouteCalculatorArn(scope: Construct, id: string, routeCalculatorArn: string): IRouteCalculator {
const parsedArn = Stack.of(scope).splitArn(routeCalculatorArn, ArnFormat.SLASH_RESOURCE_NAME);

if (!parsedArn.resourceName) {
throw new Error(`Route Calculator Arn ${routeCalculatorArn} does not have a resource name.`);
}

class Import extends RouteCalculatorBase {
public readonly routeCalculatorName = parsedArn.resourceName!;
public readonly routeCalculatorArn = routeCalculatorArn;
}

return new Import(scope, id, {
account: parsedArn.account,
region: parsedArn.region,
});
}

public readonly routeCalculatorName: string;

public readonly routeCalculatorArn: string;

/**
* The timestamp for when the route calculator resource was created in ISO 8601 format
*
* @attribute
*/
public readonly routeCalculatorCreateTime: string;

/**
* The timestamp for when the route calculator resource was last updated in ISO 8601 format
*
* @attribute
*/
public readonly routeCalculatorUpdateTime: string;

constructor(scope: Construct, id: string, props: RouteCalculatorProps = {}) {

if (props.description && !Token.isUnresolved(props.description) && props.description.length > 1000) {
throw new Error(`\`description\` must be between 0 and 1000 characters. Received: ${props.description.length} characters`);
}

if (props.routeCalculatorName && !Token.isUnresolved(props.routeCalculatorName) && !/^[-.\w]{1,100}$/.test(props.routeCalculatorName)) {
throw new Error(`Invalid route calculator name. The route calculator name must be between 1 and 100 characters and contain only alphanumeric characters, hyphens, periods and underscores. Received: ${props.routeCalculatorName}`);
}

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super(scope, id, {
physicalName: props.routeCalculatorName ?? Lazy.string({ produce: () => generateUniqueId(this) }),
});

const routeCalculator = new CfnRouteCalculator(this, 'Resource', {
calculatorName: this.physicalName,
dataSource: props.dataSource ?? DataSource.ESRI,
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I think CFN doc didn't specify a default value. I'm not familiar with this service/resource, can you briefly explain the reasoning of choosing ESRI as the default behaviour?

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@mazyu36 mazyu36 Aug 29, 2024

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I aligned it with the already implemented PlaceIndex class.
https://github.com/aws/aws-cdk/blob/main/packages/%40aws-cdk/aws-location-alpha/lib/place-index.ts#L42

However, since it's listed as a required item in the CFn documentation, I've adjusted it to match that.

I think the DataSource for PlaceIndex should also be required, but I haven't made that change this time.

description: props.description,
});

this.routeCalculatorName = routeCalculator.ref;
this.routeCalculatorArn = routeCalculator.attrArn;
this.routeCalculatorCreateTime = routeCalculator.attrCreateTime;
this.routeCalculatorUpdateTime = routeCalculator.attrUpdateTime;
}
}
10 changes: 10 additions & 0 deletions packages/@aws-cdk/aws-location-alpha/lib/util.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
import { Names } from 'aws-cdk-lib/core';
import { IConstruct } from 'constructs';

export function generateUniqueId(context: IConstruct): string {
const name = Names.uniqueId(context);
if (name.length > 100) {
return name.substring(0, 50) + name.substring(name.length - 50);
}
return name;
}

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Original file line number Diff line number Diff line change
@@ -0,0 +1,45 @@
{
"Resources": {
"RouteCalculator0F2D109D": {
"Type": "AWS::Location::RouteCalculator",
"Properties": {
"CalculatorName": "cdkinteglocationroutecalculatorRouteCalculator916939B5",
"DataSource": "Esri"
}
}
},
"Parameters": {
"BootstrapVersion": {
"Type": "AWS::SSM::Parameter::Value<String>",
"Default": "/cdk-bootstrap/hnb659fds/version",
"Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
}
},
"Rules": {
"CheckBootstrapVersion": {
"Assertions": [
{
"Assert": {
"Fn::Not": [
{
"Fn::Contains": [
[
"1",
"2",
"3",
"4",
"5"
],
{
"Ref": "BootstrapVersion"
}
]
}
]
},
"AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
}
]
}
}
}

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

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