> **Experimental**
>
> `@aws-cdk/aws-gamelift-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# IMatchmakingRuleSet

Represents a Gamelift matchmaking ruleset.

Extends: IMatchmakingRuleSet
Extends: IResource
Implemented by: MatchmakingRuleSet, MatchmakingRuleSetBase

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/matchmaking-ruleset.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-gamelift-alpha/lib/matchmaking-ruleset.ts#L13)

## Properties

- `env`: [ResourceEnvironment](/cdk/api/v2/docs/aws-cdk-lib.interfaces.ResourceEnvironment.html) — The environment this resource belongs to.

  For resources that are created and managed in a Stack (those created by
  creating new class instances like `new Role()`, `new Bucket()`, etc.), this
  is always the same as the environment of the stack they belong to.

  For referenced resources (those obtained from referencing methods like
  `Role.fromRoleArn()`, `Bucket.fromBucketName()`, etc.), they might be
  different than the stack they were imported into.

- `matchmakingRuleSetArn`: string — The ARN of the ruleSet.

- `matchmakingRuleSetName`: string — The unique name of the ruleSet.

- `node`: [Node](/cdk/api/v2/docs/constructs.Node.html) — The tree node.

- `stack`: [Stack](/cdk/api/v2/docs/aws-cdk-lib.Stack.html) — The stack in which this resource is defined.

## Methods

- `applyRemovalPolicy(policy: RemovalPolicy): void` — Apply the given removal policy to this resource.

  The Removal Policy controls what happens to this resource when it stops
  being managed by CloudFormation, either because you've removed it from the
  CDK application or because you've made a change that requires the resource
  to be replaced.

  The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
  account for data recovery and cleanup later (`RemovalPolicy.RETAIN`).

- `metric(metricName: string, props?: MetricOptions): Metric` — Return the given named metric for this matchmaking ruleSet.

- `metricRuleEvaluationsFailed(props?: MetricOptions): Metric` — Rule evaluations during matchmaking that failed since the last report.

  This metric is limited to the top 50 rules.

- `metricRuleEvaluationsPassed(props?: MetricOptions): Metric` — Rule evaluations during the matchmaking process that passed since the last report.

  This metric is limited to the top 50 rules.

- `with(...mixins: IMixin[]): IConstruct` — Applies one or more mixins to this construct.

  Mixins are applied in order. The list of constructs is captured at the
  start of the call, so constructs added by a mixin will not be visited.

  **Parameters**

  - `mixins` — The mixins to apply.

  **Returns:** This construct for chaining