feat(scheduler-targets-alpha): SnsPublish scheduler target (aws#27838)

Closes aws#27459 

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-scheduler-targets-alpha/README.md

@@ -28,6 +28,7 @@ The following targets are supported:
 2. `targets.StepFunctionsStartExecution`: [Start an AWS Step Function](#start-an-aws-step-function)
 3. `targets.CodeBuildStartBuild`: [Start a CodeBuild job](#start-a-codebuild-job)
 4. `targets.SqsSendMessage`: [Send a Message to an Amazon SQS Queue](#send-a-message-to-sqs-queue)
+5. `targets.SnsPublish`: [Publish messages to an Amazon SNS topic](#publish-messages-to-an-amazon-sns-topic)
 
 ## Invoke a Lambda function
 
@@ -151,3 +152,29 @@ new Schedule(this, 'Schedule', {
     target
 });
 ```
+
+## Publish messages to an Amazon SNS topic
+
+Use the `SnsPublish` target to publish messages to an Amazon SNS topic.
+
+The code snippets below create create an event rule with a Amazon SNS topic as a target.
+It's called every hour by Amazon Event Bridge Scheduler with custom payload.
+
+```ts
+import * as sns from 'aws-cdk-lib/aws-sns';
+
+const topic = new sns.Topic(this, 'Topic');
+
+const payload = {
+  message: 'Hello scheduler!',
+};
+
+const target = new targets.SnsPublish(topic, {
+  input: ScheduleTargetInput.fromObject(payload),
+});
+
+new Schedule(this, 'Schedule', {
+  schedule: ScheduleExpression.rate(Duration.hours(1)),
+  target,
+});
+```

packages/@aws-cdk/aws-scheduler-targets-alpha/lib/index.ts

@@ -1,5 +1,6 @@
-export * from './target';
-export * from './lambda-invoke';
-export * from './stepfunctions-start-execution';
 export * from './codebuild-start-build';
+export * from './lambda-invoke';
+export * from './sns-publish';
 export * from './sqs-send-message';
+export * from './stepfunctions-start-execution';
+export * from './target';

packages/@aws-cdk/aws-scheduler-targets-alpha/lib/sns-publish.ts

@@ -0,0 +1,37 @@
+import { ISchedule, IScheduleTarget } from '@aws-cdk/aws-scheduler-alpha';
+import { Names } from 'aws-cdk-lib';
+import { IRole } from 'aws-cdk-lib/aws-iam';
+import * as sns from 'aws-cdk-lib/aws-sns';
+import { ScheduleTargetBase, ScheduleTargetBaseProps } from './target';
+import { sameEnvDimension } from './util';
+
+/**
+ * Use an Amazon SNS topic as a target for AWS EventBridge Scheduler.
+ */
+export class SnsPublish extends ScheduleTargetBase implements IScheduleTarget {
+  constructor(
+    private readonly topic: sns.ITopic,
+    private readonly props: ScheduleTargetBaseProps = {},
+  ) {
+    super(props, topic.topicArn);
+  }
+
+  protected addTargetActionToRole(schedule: ISchedule, role: IRole): void {
+    // Check if target and schedule are in the region
+    if (!sameEnvDimension(this.topic.env.region, schedule.env.region)) {
+      throw new Error(`Cannot assign topic in region ${this.topic.env.region} to the schedule ${Names.nodeUniqueId(schedule.node)} in region ${schedule.env.region}. Both the schedule and the topic must be in the same region.`);
+    }
+
+    // Check if target and schedule are in the same account
+    if (!sameEnvDimension(this.topic.env.account, schedule.env.account)) {
+      throw new Error(`Cannot assign topic in account ${this.topic.env.account} to the schedule ${Names.nodeUniqueId(schedule.node)} in account ${role.env.account}. Both the schedule and the topic must be in the same account.`);
+    }
+
+    // Check if target and role are in the same account
+    if (this.props.role && !sameEnvDimension(this.props.role.env.account, this.topic.env.account)) {
+      throw new Error(`Cannot grant permission to execution role in account ${this.props.role.env.account} to publish to target ${Names.nodeUniqueId(this.topic.node)} in account ${this.topic.env.account}. Both the target and the execution role must be in the same account.`);
+    }
+
+    this.topic.grantPublish(role);
+  }
+}

packages/@aws-cdk/aws-scheduler-targets-alpha/test/integ.sns-publish.js.snapshot/AwsSchedulerTargetsSnsPublish.template.json

@@ -0,0 +1,184 @@
+{
+ "Resources": {
+  "TopicBFC7AF6E": {
+   "Type": "AWS::SNS::Topic"
+  },
+  "Queue4A7E3555": {
+   "Type": "AWS::SQS::Queue",
+   "UpdateReplacePolicy": "Delete",
+   "DeletionPolicy": "Delete"
+  },
+  "QueuePolicy25439813": {
+   "Type": "AWS::SQS::QueuePolicy",
+   "Properties": {
+    "PolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sqs:SendMessage",
+       "Condition": {
+        "ArnEquals": {
+         "aws:SourceArn": {
+          "Ref": "TopicBFC7AF6E"
+         }
+        }
+       },
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "sns.amazonaws.com"
+       },
+       "Resource": {
+        "Fn::GetAtt": [
+         "Queue4A7E3555",
+         "Arn"
+        ]
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "Queues": [
+     {
+      "Ref": "Queue4A7E3555"
+     }
+    ]
+   }
+  },
+  "QueueAwsSchedulerTargetsSnsPublishTopicCB9BF6E1C346AD60": {
+   "Type": "AWS::SNS::Subscription",
+   "Properties": {
+    "Endpoint": {
+     "Fn::GetAtt": [
+      "Queue4A7E3555",
+      "Arn"
+     ]
+    },
+    "Protocol": "sqs",
+    "RawMessageDelivery": true,
+    "TopicArn": {
+     "Ref": "TopicBFC7AF6E"
+    }
+   },
+   "DependsOn": [
+    "QueuePolicy25439813"
+   ]
+  },
+  "Schedule83A77FD1": {
+   "Type": "AWS::Scheduler::Schedule",
+   "Properties": {
+    "FlexibleTimeWindow": {
+     "Mode": "OFF"
+    },
+    "ScheduleExpression": "rate(1 minute)",
+    "ScheduleExpressionTimezone": "Etc/UTC",
+    "State": "ENABLED",
+    "Target": {
+     "Arn": {
+      "Ref": "TopicBFC7AF6E"
+     },
+     "Input": "\"Hello, Scheduler!\"",
+     "RetryPolicy": {
+      "MaximumEventAgeInSeconds": 86400,
+      "MaximumRetryAttempts": 185
+     },
+     "RoleArn": {
+      "Fn::GetAtt": [
+       "SchedulerRoleForTarget1441a743A31888",
+       "Arn"
+      ]
+     }
+    }
+   }
+  },
+  "SchedulerRoleForTarget1441a743A31888": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Condition": {
+        "StringEquals": {
+         "aws:SourceAccount": {
+          "Ref": "AWS::AccountId"
+         }
+        }
+       },
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "scheduler.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    }
+   }
+  },
+  "SchedulerRoleForTarget1441a7DefaultPolicy885B6BFD": {
+   "Type": "AWS::IAM::Policy",
+   "Properties": {
+    "PolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sns:Publish",
+       "Effect": "Allow",
+       "Resource": {
+        "Ref": "TopicBFC7AF6E"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "PolicyName": "SchedulerRoleForTarget1441a7DefaultPolicy885B6BFD",
+    "Roles": [
+     {
+      "Ref": "SchedulerRoleForTarget1441a743A31888"
+     }
+    ]
+   }
+  }
+ },
+ "Outputs": {
+  "ExportsOutputRefQueue4A7E3555425E8BD3": {
+   "Value": {
+    "Ref": "Queue4A7E3555"
+   },
+   "Export": {
+    "Name": "AwsSchedulerTargetsSnsPublish:ExportsOutputRefQueue4A7E3555425E8BD3"
+   }
+  }
+ },
+ "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."
+    }
+   ]
+  }
+ }
+}