triggers

package
v2.95.1 Latest Latest
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 Go to latest Published: Sep 9, 2023 License: Apache-2.0 Imports: 16 Imported by: 0

README

Triggers

Triggers allows you to execute code during deployments. This can be used for a variety of use cases such as:

  • Self tests: validate something after a resource/construct been provisioned
  • Data priming: add initial data to resources after they are created
  • Preconditions: check things such as account limits or external dependencies before deployment.

Usage

The TriggerFunction construct will define an AWS Lambda function which is triggered during deployment:

import triggers "github.com/aws/aws-cdk-go/awscdk"


triggers.NewTriggerFunction(this, jsii.String("MyTrigger"), &TriggerFunctionProps{
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Handler: jsii.String("index.handler"),
	Code: lambda.Code_FromAsset(jsii.String(__dirname + "/my-trigger")),
})

In the above example, the AWS Lambda function defined in MyTrigger will be invoked when the stack is deployed.

It is also possible to trigger a predefined Lambda function by using the Trigger construct:

import "github.com/aws/aws-cdk-go/awscdk"


func := lambda.NewFunction(this, jsii.String("MyFunction"), &functionProps{
	Handler: jsii.String("index.handler"),
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Code: lambda.Code_FromInline(jsii.String("foo")),
})

triggers.NewTrigger(this, jsii.String("MyTrigger"), &TriggerProps{
	Handler: func,
	Timeout: awscdk.Duration_Minutes(jsii.Number(10)),
	InvocationType: triggers.InvocationType_EVENT,
})

Addition properties can be used to fine-tune the behaviour of the trigger. The timeout property can be used to determine how long the invocation of the function should take. The invocationType property can be used to change the invocation type of the function. This might be useful in scenarios where a fire-and-forget strategy for invoking the function is sufficient.

Trigger Failures

If the trigger handler fails (e.g. an exception is raised), the CloudFormation deployment will fail, as if a resource failed to provision. This makes it easy to implement "self tests" via triggers by simply making a set of assertions on some provisioned infrastructure.

Note that this behavior is only applied when invocationType is REQUEST_RESPONSE. When invocationType is EVENT, Lambda function is invoked asynchronously. In that case, if Lambda function is invoked successfully, the trigger will success regardless of the result for the function execution.

Order of Execution

By default, a trigger will be executed by CloudFormation after the associated handler is provisioned. This means that if the handler takes an implicit dependency on other resources (e.g. via environment variables), those resources will be provisioned before the trigger is executed.

In most cases, implicit ordering should be sufficient, but you can also use executeAfter and executeBefore to control the order of execution.

The following example defines the following order: (hello, world) => myTrigger => goodbye. The resources under hello and world will be provisioned in parallel, and then the trigger myTrigger will be executed. Only then the resources under goodbye will be provisioned:

import triggers "github.com/aws/aws-cdk-go/awscdk"

var myTrigger trigger
var hello construct
var world construct
var goodbye construct


myTrigger.ExecuteAfter(hello, world)
myTrigger.ExecuteBefore(goodbye)

Note that hello and world are construct scopes. This means that they can be specific resources (such as an s3.Bucket object) or groups of resources composed together into constructs.

Re-execution of Triggers

By default, executeOnHandlerChange is enabled. This implies that the trigger is re-executed every time the handler function code or configuration changes. If this option is disabled, the trigger will be executed only once upon first deployment.

In the future we will consider adding support for additional re-execution modes:

  • executeOnEveryDeployment: boolean - re-executes every time the stack is deployed (add random "salt" during synthesis).
  • executeOnResourceChange: Construct[] - re-executes when one of the resources under the specified scopes has changed (add the hash the CloudFormation resource specs).

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewTriggerFunction_Override 

func NewTriggerFunction_Override(t TriggerFunction, scope constructs.Construct, id *string, props *TriggerFunctionProps)

func NewTrigger_Override 

func NewTrigger_Override(t Trigger, scope constructs.Construct, id *string, props *TriggerProps)

func TriggerFunction_ClassifyVersionProperty 

func TriggerFunction_ClassifyVersionProperty(propertyName *string, locked *bool)

Record whether specific properties in the `AWS::Lambda::Function` resource should also be associated to the Version resource.

See 'currentVersion' section in the module README for more details.

func TriggerFunction_FromFunctionArn 

func TriggerFunction_FromFunctionArn(scope constructs.Construct, id *string, functionArn *string) awslambda.IFunction

Import a lambda function into the CDK using its ARN.

func TriggerFunction_FromFunctionAttributes 

func TriggerFunction_FromFunctionAttributes(scope constructs.Construct, id *string, attrs *awslambda.FunctionAttributes) awslambda.IFunction

Creates a Lambda function object which represents a function not defined within this stack.

func TriggerFunction_FromFunctionName 

func TriggerFunction_FromFunctionName(scope constructs.Construct, id *string, functionName *string) awslambda.IFunction

Import a lambda function into the CDK using its name.

func TriggerFunction_IsConstruct 

func TriggerFunction_IsConstruct(x interface{}) *bool

Checks if `x` is a construct.

Use this method instead of `instanceof` to properly detect `Construct` instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the `constructs` library on disk are seen as independent, completely different libraries. As a consequence, the class `Construct` in each copy of the `constructs` library is seen as a different class, and an instance of one class will not test as `instanceof` the other class. `npm install` will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the `constructs` library can be accidentally installed, and `instanceof` will behave unpredictably. It is safest to avoid using `instanceof`, and using this type-testing method instead.

Returns: true if `x` is an object created from a class which extends `Construct`.

func TriggerFunction_IsOwnedResource added in v2.32.0 

func TriggerFunction_IsOwnedResource(construct constructs.IConstruct) *bool

Returns true if the construct was created by CDK, and false otherwise.

func TriggerFunction_IsResource 

func TriggerFunction_IsResource(construct constructs.IConstruct) *bool

Check whether the given construct is a Resource.

func TriggerFunction_MetricAll 

func TriggerFunction_MetricAll(metricName *string, props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Return the given named metric for this Lambda.

func TriggerFunction_MetricAllConcurrentExecutions 

func TriggerFunction_MetricAllConcurrentExecutions(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of concurrent executions across all Lambdas. Default: max over 5 minutes.

func TriggerFunction_MetricAllDuration 

func TriggerFunction_MetricAllDuration(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the Duration executing all Lambdas. Default: average over 5 minutes.

func TriggerFunction_MetricAllErrors 

func TriggerFunction_MetricAllErrors(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of Errors executing all Lambdas. Default: sum over 5 minutes.

func TriggerFunction_MetricAllInvocations 

func TriggerFunction_MetricAllInvocations(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of invocations of all Lambdas. Default: sum over 5 minutes.

func TriggerFunction_MetricAllThrottles 

func TriggerFunction_MetricAllThrottles(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of throttled invocations of all Lambdas. Default: sum over 5 minutes.

func TriggerFunction_MetricAllUnreservedConcurrentExecutions 

func TriggerFunction_MetricAllUnreservedConcurrentExecutions(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of unreserved concurrent executions across all Lambdas. Default: max over 5 minutes.

func Trigger_IsConstruct 

func Trigger_IsConstruct(x interface{}) *bool

Checks if `x` is a construct.

Use this method instead of `instanceof` to properly detect `Construct` instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the `constructs` library on disk are seen as independent, completely different libraries. As a consequence, the class `Construct` in each copy of the `constructs` library is seen as a different class, and an instance of one class will not test as `instanceof` the other class. `npm install` will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the `constructs` library can be accidentally installed, and `instanceof` will behave unpredictably. It is safest to avoid using `instanceof`, and using this type-testing method instead.

Returns: true if `x` is an object created from a class which extends `Construct`.

Types

type ITrigger 

type ITrigger interface {
	constructs.IConstruct
	// Adds trigger dependencies.
	//
	// Execute this trigger only after these construct
	// scopes have been provisioned.
	ExecuteAfter(scopes ...constructs.Construct)
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	ExecuteBefore(scopes ...constructs.Construct)
}

Interface for triggers.

type InvocationType added in v2.56.0 

type InvocationType string

The invocation type to apply to a trigger.

This determines whether the trigger function should await the result of the to be triggered function or not.

Example: 

import "github.com/aws/aws-cdk-go/awscdk"

func := lambda.NewFunction(this, jsii.String("MyFunction"), &functionProps{
	Handler: jsii.String("index.handler"),
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Code: lambda.Code_FromInline(jsii.String("foo")),
})

triggers.NewTrigger(this, jsii.String("MyTrigger"), &TriggerProps{
	Handler: func,
	Timeout: awscdk.Duration_Minutes(jsii.Number(10)),
	InvocationType: triggers.InvocationType_EVENT,
})

const (
	// Invoke the function asynchronously.
	//
	// Send events that fail multiple times to the function's dead-letter queue (if one is configured).
	// The API response only includes a status code.
	InvocationType_EVENT InvocationType = "EVENT"
	// Invoke the function synchronously.
	//
	// Keep the connection open until the function returns a response or times out.
	// The API response includes the function response and additional data.
	InvocationType_REQUEST_RESPONSE InvocationType = "REQUEST_RESPONSE"
	// Validate parameter values and verify that the user or role has permission to invoke the function.
	InvocationType_DRY_RUN InvocationType = "DRY_RUN"
)

type Trigger 

type Trigger interface {
	constructs.Construct
	ITrigger
	// The tree node.
	Node() constructs.Node
	// Adds trigger dependencies.
	//
	// Execute this trigger only after these construct
	// scopes have been provisioned.
	ExecuteAfter(scopes ...constructs.Construct)
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	ExecuteBefore(scopes ...constructs.Construct)
	// Returns a string representation of this construct.
	ToString() *string
}

Triggers an AWS Lambda function during deployment.

Example: 

import "github.com/aws/aws-cdk-go/awscdk"

func := lambda.NewFunction(this, jsii.String("MyFunction"), &functionProps{
	Handler: jsii.String("index.handler"),
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Code: lambda.Code_FromInline(jsii.String("foo")),
})

triggers.NewTrigger(this, jsii.String("MyTrigger"), &TriggerProps{
	Handler: func,
	Timeout: awscdk.Duration_Minutes(jsii.Number(10)),
	InvocationType: triggers.InvocationType_EVENT,
})

func NewTrigger 

func NewTrigger(scope constructs.Construct, id *string, props *TriggerProps) Trigger

type TriggerFunction 

type TriggerFunction interface {
	awslambda.Function
	ITrigger
	// The architecture of this Lambda Function (this is an optional attribute and defaults to X86_64).
	Architecture() awslambda.Architecture
	// Whether the addPermission() call adds any permissions.
	//
	// True for new Lambdas, false for version $LATEST and imported Lambdas
	// from different accounts.
	CanCreatePermissions() *bool
	// Access the Connections object.
	//
	// Will fail if not a VPC-enabled Lambda Function.
	Connections() awsec2.Connections
	// Returns a `lambda.Version` which represents the current version of this Lambda function. A new version will be created every time the function's configuration changes.
	//
	// You can specify options for this version using the `currentVersionOptions`
	// prop when initializing the `lambda.Function`.
	CurrentVersion() awslambda.Version
	// The DLQ (as queue) associated with this Lambda Function (this is an optional attribute).
	DeadLetterQueue() awssqs.IQueue
	// The DLQ (as topic) associated with this Lambda Function (this is an optional attribute).
	DeadLetterTopic() awssns.ITopic
	// The environment this resource belongs to.
	//
	// For resources that are created and managed by the CDK
	// (generally, those created by creating new class instances like Role, Bucket, etc.),
	// this is always the same as the environment of the stack they belong to;
	// however, for imported resources
	// (those obtained from static methods like fromRoleArn, fromBucketName, etc.),
	// that might be different than the stack they were imported into.
	Env() *awscdk.ResourceEnvironment
	// ARN of this function.
	FunctionArn() *string
	// Name of this function.
	FunctionName() *string
	// The principal this Lambda Function is running as.
	GrantPrincipal() awsiam.IPrincipal
	// Whether or not this Lambda function was bound to a VPC.
	//
	// If this is is `false`, trying to access the `connections` object will fail.
	IsBoundToVpc() *bool
	// The `$LATEST` version of this function.
	//
	// Note that this is reference to a non-specific AWS Lambda version, which
	// means the function this version refers to can return different results in
	// different invocations.
	//
	// To obtain a reference to an explicit version which references the current
	// function configuration, use `lambdaFunction.currentVersion` instead.
	LatestVersion() awslambda.IVersion
	// The LogGroup where the Lambda function's logs are made available.
	//
	// If either `logRetention` is set or this property is called, a CloudFormation custom resource is added to the stack that
	// pre-creates the log group as part of the stack deployment, if it already doesn't exist, and sets the correct log retention
	// period (never expire, by default).
	//
	// Further, if the log group already exists and the `logRetention` is not set, the custom resource will reset the log retention
	// to never expire even if it was configured with a different value.
	LogGroup() awslogs.ILogGroup
	// The tree node.
	Node() constructs.Node
	// The construct node where permissions are attached.
	PermissionsNode() constructs.Node
	// Returns a string-encoded token that resolves to the physical name that should be passed to the CloudFormation resource.
	//
	// This value will resolve to one of the following:
	// - a concrete value (e.g. `"my-awesome-bucket"`)
	// - `undefined`, when a name should be generated by CloudFormation
	// - a concrete name generated automatically during synthesis, in
	//   cross-environment scenarios.
	PhysicalName() *string
	// The ARN(s) to put into the resource field of the generated IAM policy for grantInvoke().
	ResourceArnsForGrantInvoke() *[]*string
	// Execution role associated with this function.
	Role() awsiam.IRole
	// The runtime configured for this lambda.
	Runtime() awslambda.Runtime
	// The stack in which this resource is defined.
	Stack() awscdk.Stack
	// The timeout configured for this lambda.
	Timeout() awscdk.Duration
	// The underlying trigger resource.
	Trigger() Trigger
	// Defines an alias for this function.
	//
	// The alias will automatically be updated to point to the latest version of
	// the function as it is being updated during a deployment.
	//
	// “`ts
	// declare const fn: lambda.Function;
	//
	// fn.addAlias('Live');
	//
	// // Is equivalent to
	//
	// new lambda.Alias(this, 'AliasLive', {
	//   aliasName: 'Live',
	//   version: fn.currentVersion,
	// });
	// “`.
	AddAlias(aliasName *string, options *awslambda.AliasOptions) awslambda.Alias
	// Adds an environment variable to this Lambda function.
	//
	// If this is a ref to a Lambda function, this operation results in a no-op.
	AddEnvironment(key *string, value *string, options *awslambda.EnvironmentOptions) awslambda.Function
	// Adds an event source to this function.
	//
	// Event sources are implemented in the aws-cdk-lib/aws-lambda-event-sources module.
	//
	// The following example adds an SQS Queue as an event source:
	// “`
	// import { SqsEventSource } from 'aws-cdk-lib/aws-lambda-event-sources';
	// myFunction.addEventSource(new SqsEventSource(myQueue));
	// “`.
	AddEventSource(source awslambda.IEventSource)
	// Adds an event source that maps to this AWS Lambda function.
	AddEventSourceMapping(id *string, options *awslambda.EventSourceMappingOptions) awslambda.EventSourceMapping
	// Adds a url to this lambda function.
	AddFunctionUrl(options *awslambda.FunctionUrlOptions) awslambda.FunctionUrl
	// Adds one or more Lambda Layers to this Lambda function.
	AddLayers(layers ...awslambda.ILayerVersion)
	// Adds a permission to the Lambda resource policy.
	// See: Permission for details.
	//
	AddPermission(id *string, permission *awslambda.Permission)
	// Adds a statement to the IAM role assumed by the instance.
	AddToRolePolicy(statement awsiam.PolicyStatement)
	// 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`).
	ApplyRemovalPolicy(policy awscdk.RemovalPolicy)
	// Configures options for asynchronous invocation.
	ConfigureAsyncInvoke(options *awslambda.EventInvokeConfigOptions)
	// A warning will be added to functions under the following conditions: - permissions that include `lambda:InvokeFunction` are added to the unqualified function.
	//
	// - function.currentVersion is invoked before or after the permission is created.
	//
	// This applies only to permissions on Lambda functions, not versions or aliases.
	// This function is overridden as a noOp for QualifiedFunctionBase.
	ConsiderWarningOnInvokeFunctionPermissions(scope constructs.Construct, action *string)
	// Adds trigger dependencies.
	//
	// Execute this trigger only after these construct
	// scopes have been provisioned.
	ExecuteAfter(scopes ...constructs.Construct)
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	ExecuteBefore(scopes ...constructs.Construct)
	GeneratePhysicalName() *string
	// Returns an environment-sensitive token that should be used for the resource's "ARN" attribute (e.g. `bucket.bucketArn`).
	//
	// Normally, this token will resolve to `arnAttr`, but if the resource is
	// referenced across environments, `arnComponents` will be used to synthesize
	// a concrete ARN with the resource's physical name. Make sure to reference
	// `this.physicalName` in `arnComponents`.
	GetResourceArnAttribute(arnAttr *string, arnComponents *awscdk.ArnComponents) *string
	// Returns an environment-sensitive token that should be used for the resource's "name" attribute (e.g. `bucket.bucketName`).
	//
	// Normally, this token will resolve to `nameAttr`, but if the resource is
	// referenced across environments, it will be resolved to `this.physicalName`,
	// which will be a concrete name.
	GetResourceNameAttribute(nameAttr *string) *string
	// Grant the given identity permissions to invoke this Lambda.
	GrantInvoke(grantee awsiam.IGrantable) awsiam.Grant
	// Grant the given identity permissions to invoke this Lambda Function URL.
	GrantInvokeUrl(grantee awsiam.IGrantable) awsiam.Grant
	// Mix additional information into the hash of the Version object.
	//
	// The Lambda Function construct does its best to automatically create a new
	// Version when anything about the Function changes (its code, its layers,
	// any of the other properties).
	//
	// However, you can sometimes source information from places that the CDK cannot
	// look into, like the deploy-time values of SSM parameters. In those cases,
	// the CDK would not force the creation of a new Version object when it actually
	// should.
	//
	// This method can be used to invalidate the current Version object. Pass in
	// any string into this method, and make sure the string changes when you know
	// a new Version needs to be created.
	//
	// This method may be called more than once.
	InvalidateVersionBasedOn(x *string)
	// Return the given named metric for this Function.
	Metric(metricName *string, props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How long execution of this Lambda takes.
	//
	// Average over 5 minutes.
	MetricDuration(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How many invocations of this Lambda fail.
	//
	// Sum over 5 minutes.
	MetricErrors(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How often this Lambda is invoked.
	//
	// Sum over 5 minutes.
	MetricInvocations(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How often this Lambda is throttled.
	//
	// Sum over 5 minutes.
	MetricThrottles(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// Returns a string representation of this construct.
	ToString() *string
	WarnInvokeFunctionPermissions(scope constructs.Construct)
}

Invokes an AWS Lambda function during deployment.

Example: 

import triggers "github.com/aws/aws-cdk-go/awscdk"

triggers.NewTriggerFunction(this, jsii.String("MyTrigger"), &TriggerFunctionProps{
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Handler: jsii.String("index.handler"),
	Code: lambda.Code_FromAsset(jsii.String(__dirname + "/my-trigger")),
})

func NewTriggerFunction 

func NewTriggerFunction(scope constructs.Construct, id *string, props *TriggerFunctionProps) TriggerFunction

type TriggerFunctionProps 

type TriggerFunctionProps struct {
	// The maximum age of a request that Lambda sends to a function for processing.
	//
	// Minimum: 60 seconds
	// Maximum: 6 hours.
	// Default: Duration.hours(6)
	//
	MaxEventAge awscdk.Duration `field:"optional" json:"maxEventAge" yaml:"maxEventAge"`
	// The destination for failed invocations.
	// Default: - no destination.
	//
	OnFailure awslambda.IDestination `field:"optional" json:"onFailure" yaml:"onFailure"`
	// The destination for successful invocations.
	// Default: - no destination.
	//
	OnSuccess awslambda.IDestination `field:"optional" json:"onSuccess" yaml:"onSuccess"`
	// The maximum number of times to retry when the function returns an error.
	//
	// Minimum: 0
	// Maximum: 2.
	// Default: 2.
	//
	RetryAttempts *float64 `field:"optional" json:"retryAttempts" yaml:"retryAttempts"`
	// Specify the configuration of AWS Distro for OpenTelemetry (ADOT) instrumentation.
	// See: https://aws-otel.github.io/docs/getting-started/lambda
	//
	// Default: - No ADOT instrumentation.
	//
	AdotInstrumentation *awslambda.AdotInstrumentationConfig `field:"optional" json:"adotInstrumentation" yaml:"adotInstrumentation"`
	// Whether to allow the Lambda to send all network traffic.
	//
	// If set to false, you must individually add traffic rules to allow the
	// Lambda to connect to network targets.
	// Default: true.
	//
	AllowAllOutbound *bool `field:"optional" json:"allowAllOutbound" yaml:"allowAllOutbound"`
	// Lambda Functions in a public subnet can NOT access the internet.
	//
	// Use this property to acknowledge this limitation and still place the function in a public subnet.
	// See: https://stackoverflow.com/questions/52992085/why-cant-an-aws-lambda-function-inside-a-public-subnet-in-a-vpc-connect-to-the/52994841#52994841
	//
	// Default: false.
	//
	AllowPublicSubnet *bool `field:"optional" json:"allowPublicSubnet" yaml:"allowPublicSubnet"`
	// The system architectures compatible with this lambda function.
	// Default: Architecture.X86_64
	//
	Architecture awslambda.Architecture `field:"optional" json:"architecture" yaml:"architecture"`
	// Code signing config associated with this function.
	// Default: - Not Sign the Code.
	//
	CodeSigningConfig awslambda.ICodeSigningConfig `field:"optional" json:"codeSigningConfig" yaml:"codeSigningConfig"`
	// Options for the `lambda.Version` resource automatically created by the `fn.currentVersion` method.
	// Default: - default options as described in `VersionOptions`.
	//
	CurrentVersionOptions *awslambda.VersionOptions `field:"optional" json:"currentVersionOptions" yaml:"currentVersionOptions"`
	// The SQS queue to use if DLQ is enabled.
	//
	// If SNS topic is desired, specify `deadLetterTopic` property instead.
	// Default: - SQS queue with 14 day retention period if `deadLetterQueueEnabled` is `true`.
	//
	DeadLetterQueue awssqs.IQueue `field:"optional" json:"deadLetterQueue" yaml:"deadLetterQueue"`
	// Enabled DLQ.
	//
	// If `deadLetterQueue` is undefined,
	// an SQS queue with default options will be defined for your Function.
	// Default: - false unless `deadLetterQueue` is set, which implies DLQ is enabled.
	//
	DeadLetterQueueEnabled *bool `field:"optional" json:"deadLetterQueueEnabled" yaml:"deadLetterQueueEnabled"`
	// The SNS topic to use as a DLQ.
	//
	// Note that if `deadLetterQueueEnabled` is set to `true`, an SQS queue will be created
	// rather than an SNS topic. Using an SNS topic as a DLQ requires this property to be set explicitly.
	// Default: - no SNS topic.
	//
	DeadLetterTopic awssns.ITopic `field:"optional" json:"deadLetterTopic" yaml:"deadLetterTopic"`
	// A description of the function.
	// Default: - No description.
	//
	Description *string `field:"optional" json:"description" yaml:"description"`
	// Key-value pairs that Lambda caches and makes available for your Lambda functions.
	//
	// Use environment variables to apply configuration changes, such
	// as test and production environment configurations, without changing your
	// Lambda function source code.
	// Default: - No environment variables.
	//
	Environment *map[string]*string `field:"optional" json:"environment" yaml:"environment"`
	// The AWS KMS key that's used to encrypt your function's environment variables.
	// Default: - AWS Lambda creates and uses an AWS managed customer master key (CMK).
	//
	EnvironmentEncryption awskms.IKey `field:"optional" json:"environmentEncryption" yaml:"environmentEncryption"`
	// The size of the function’s /tmp directory in MiB.
	// Default: 512 MiB.
	//
	EphemeralStorageSize awscdk.Size `field:"optional" json:"ephemeralStorageSize" yaml:"ephemeralStorageSize"`
	// Event sources for this function.
	//
	// You can also add event sources using `addEventSource`.
	// Default: - No event sources.
	//
	Events *[]awslambda.IEventSource `field:"optional" json:"events" yaml:"events"`
	// The filesystem configuration for the lambda function.
	// Default: - will not mount any filesystem.
	//
	Filesystem awslambda.FileSystem `field:"optional" json:"filesystem" yaml:"filesystem"`
	// A name for the function.
	// Default: - AWS CloudFormation generates a unique physical ID and uses that
	// ID for the function's name. For more information, see Name Type.
	//
	FunctionName *string `field:"optional" json:"functionName" yaml:"functionName"`
	// Initial policy statements to add to the created Lambda Role.
	//
	// You can call `addToRolePolicy` to the created lambda to add statements post creation.
	// Default: - No policy statements are added to the created Lambda role.
	//
	InitialPolicy *[]awsiam.PolicyStatement `field:"optional" json:"initialPolicy" yaml:"initialPolicy"`
	// Specify the version of CloudWatch Lambda insights to use for monitoring.
	// See: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Lambda-Insights-Getting-Started-docker.html
	//
	// Default: - No Lambda Insights.
	//
	InsightsVersion awslambda.LambdaInsightsVersion `field:"optional" json:"insightsVersion" yaml:"insightsVersion"`
	// A list of layers to add to the function's execution environment.
	//
	// You can configure your Lambda function to pull in
	// additional code during initialization in the form of layers. Layers are packages of libraries or other dependencies
	// that can be used by multiple functions.
	// Default: - No layers.
	//
	Layers *[]awslambda.ILayerVersion `field:"optional" json:"layers" yaml:"layers"`
	// The number of days log events are kept in CloudWatch Logs.
	//
	// When updating
	// this property, unsetting it doesn't remove the log retention policy. To
	// remove the retention policy, set the value to `INFINITE`.
	// Default: logs.RetentionDays.INFINITE
	//
	LogRetention awslogs.RetentionDays `field:"optional" json:"logRetention" yaml:"logRetention"`
	// When log retention is specified, a custom resource attempts to create the CloudWatch log group.
	//
	// These options control the retry policy when interacting with CloudWatch APIs.
	// Default: - Default AWS SDK retry options.
	//
	LogRetentionRetryOptions *awslambda.LogRetentionRetryOptions `field:"optional" json:"logRetentionRetryOptions" yaml:"logRetentionRetryOptions"`
	// The IAM role for the Lambda function associated with the custom resource that sets the retention policy.
	// Default: - A new role is created.
	//
	LogRetentionRole awsiam.IRole `field:"optional" json:"logRetentionRole" yaml:"logRetentionRole"`
	// The amount of memory, in MB, that is allocated to your Lambda function.
	//
	// Lambda uses this value to proportionally allocate the amount of CPU
	// power. For more information, see Resource Model in the AWS Lambda
	// Developer Guide.
	// Default: 128.
	//
	MemorySize *float64 `field:"optional" json:"memorySize" yaml:"memorySize"`
	// Specify the configuration of Parameters and Secrets Extension.
	// See: https://docs.aws.amazon.com/systems-manager/latest/userguide/ps-integration-lambda-extensions.html
	//
	// Default: - No Parameters and Secrets Extension.
	//
	ParamsAndSecrets awslambda.ParamsAndSecretsLayerVersion `field:"optional" json:"paramsAndSecrets" yaml:"paramsAndSecrets"`
	// Enable profiling.
	// See: https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html
	//
	// Default: - No profiling.
	//
	Profiling *bool `field:"optional" json:"profiling" yaml:"profiling"`
	// Profiling Group.
	// See: https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html
	//
	// Default: - A new profiling group will be created if `profiling` is set.
	//
	ProfilingGroup awscodeguruprofiler.IProfilingGroup `field:"optional" json:"profilingGroup" yaml:"profilingGroup"`
	// The maximum of concurrent executions you want to reserve for the function.
	// See: https://docs.aws.amazon.com/lambda/latest/dg/concurrent-executions.html
	//
	// Default: - No specific limit - account limit.
	//
	ReservedConcurrentExecutions *float64 `field:"optional" json:"reservedConcurrentExecutions" yaml:"reservedConcurrentExecutions"`
	// Lambda execution role.
	//
	// This is the role that will be assumed by the function upon execution.
	// It controls the permissions that the function will have. The Role must
	// be assumable by the 'lambda.amazonaws.com' service principal.
	//
	// The default Role automatically has permissions granted for Lambda execution. If you
	// provide a Role, you must add the relevant AWS managed policies yourself.
	//
	// The relevant managed policies are "service-role/AWSLambdaBasicExecutionRole" and
	// "service-role/AWSLambdaVPCAccessExecutionRole".
	// Default: - A unique role will be generated for this lambda function.
	// Both supplied and generated roles can always be changed by calling `addToRolePolicy`.
	//
	Role awsiam.IRole `field:"optional" json:"role" yaml:"role"`
	// Sets the runtime management configuration for a function's version.
	// Default: Auto.
	//
	RuntimeManagementMode awslambda.RuntimeManagementMode `field:"optional" json:"runtimeManagementMode" yaml:"runtimeManagementMode"`
	// The list of security groups to associate with the Lambda's network interfaces.
	//
	// Only used if 'vpc' is supplied.
	// Default: - If the function is placed within a VPC and a security group is
	// not specified, either by this or securityGroup prop, a dedicated security
	// group will be created for this function.
	//
	SecurityGroups *[]awsec2.ISecurityGroup `field:"optional" json:"securityGroups" yaml:"securityGroups"`
	// Enable SnapStart for Lambda Function.
	//
	// SnapStart is currently supported only for Java 11, 17 runtime.
	// Default: - No snapstart.
	//
	SnapStart awslambda.SnapStartConf `field:"optional" json:"snapStart" yaml:"snapStart"`
	// The function execution time (in seconds) after which Lambda terminates the function.
	//
	// Because the execution time affects cost, set this value
	// based on the function's expected execution time.
	// Default: Duration.seconds(3)
	//
	Timeout awscdk.Duration `field:"optional" json:"timeout" yaml:"timeout"`
	// Enable AWS X-Ray Tracing for Lambda Function.
	// Default: Tracing.Disabled
	//
	Tracing awslambda.Tracing `field:"optional" json:"tracing" yaml:"tracing"`
	// VPC network to place Lambda network interfaces.
	//
	// Specify this if the Lambda function needs to access resources in a VPC.
	// This is required when `vpcSubnets` is specified.
	// Default: - Function is not placed within a VPC.
	//
	Vpc awsec2.IVpc `field:"optional" json:"vpc" yaml:"vpc"`
	// Where to place the network interfaces within the VPC.
	//
	// This requires `vpc` to be specified in order for interfaces to actually be
	// placed in the subnets. If `vpc` is not specify, this will raise an error.
	//
	// Note: Internet access for Lambda Functions requires a NAT Gateway, so picking
	// public subnets is not allowed (unless `allowPublicSubnet` is set to `true`).
	// Default: - the Vpc default strategy if not specified.
	//
	VpcSubnets *awsec2.SubnetSelection `field:"optional" json:"vpcSubnets" yaml:"vpcSubnets"`
	// The source code of your Lambda function.
	//
	// You can point to a file in an
	// Amazon Simple Storage Service (Amazon S3) bucket or specify your source
	// code as inline text.
	Code awslambda.Code `field:"required" json:"code" yaml:"code"`
	// The name of the method within your code that Lambda calls to execute your function.
	//
	// The format includes the file name. It can also include
	// namespaces and other qualifiers, depending on the runtime.
	// For more information, see https://docs.aws.amazon.com/lambda/latest/dg/foundation-progmodel.html.
	//
	// Use `Handler.FROM_IMAGE` when defining a function from a Docker image.
	//
	// NOTE: If you specify your source code as inline text by specifying the
	// ZipFile property within the Code property, specify index.function_name as
	// the handler.
	Handler *string `field:"required" json:"handler" yaml:"handler"`
	// The runtime environment for the Lambda function that you are uploading.
	//
	// For valid values, see the Runtime property in the AWS Lambda Developer
	// Guide.
	//
	// Use `Runtime.FROM_IMAGE` when defining a function from a Docker image.
	Runtime awslambda.Runtime `field:"required" json:"runtime" yaml:"runtime"`
	// Adds trigger dependencies. Execute this trigger only after these construct scopes have been provisioned.
	//
	// You can also use `trigger.executeAfter()` to add additional dependencies.
	// Default: [].
	//
	ExecuteAfter *[]constructs.Construct `field:"optional" json:"executeAfter" yaml:"executeAfter"`
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	//
	// You can also use `trigger.executeBefore()` to add additional dependants.
	// Default: [].
	//
	ExecuteBefore *[]constructs.Construct `field:"optional" json:"executeBefore" yaml:"executeBefore"`
	// Re-executes the trigger every time the handler changes.
	//
	// This implies that the trigger is associated with the `currentVersion` of
	// the handler, which gets recreated every time the handler or its
	// configuration is updated.
	// Default: true.
	//
	ExecuteOnHandlerChange *bool `field:"optional" json:"executeOnHandlerChange" yaml:"executeOnHandlerChange"`
}

Props for `InvokeFunction`.

Example: 

import triggers "github.com/aws/aws-cdk-go/awscdk"

triggers.NewTriggerFunction(this, jsii.String("MyTrigger"), &TriggerFunctionProps{
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Handler: jsii.String("index.handler"),
	Code: lambda.Code_FromAsset(jsii.String(__dirname + "/my-trigger")),
})

type TriggerInvalidation 

type TriggerInvalidation string

Determines. 

const (
	// The trigger will be executed every time the handler (or its configuration) changes.
	//
	// This is implemented by associated the trigger with the `currentVersion`
	// of the AWS Lambda function, which gets recreated every time the handler changes.
	TriggerInvalidation_HANDLER_CHANGE TriggerInvalidation = "HANDLER_CHANGE"
)

type TriggerOptions 

type TriggerOptions struct {
	// Adds trigger dependencies. Execute this trigger only after these construct scopes have been provisioned.
	//
	// You can also use `trigger.executeAfter()` to add additional dependencies.
	// Default: [].
	//
	ExecuteAfter *[]constructs.Construct `field:"optional" json:"executeAfter" yaml:"executeAfter"`
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	//
	// You can also use `trigger.executeBefore()` to add additional dependants.
	// Default: [].
	//
	ExecuteBefore *[]constructs.Construct `field:"optional" json:"executeBefore" yaml:"executeBefore"`
	// Re-executes the trigger every time the handler changes.
	//
	// This implies that the trigger is associated with the `currentVersion` of
	// the handler, which gets recreated every time the handler or its
	// configuration is updated.
	// Default: true.
	//
	ExecuteOnHandlerChange *bool `field:"optional" json:"executeOnHandlerChange" yaml:"executeOnHandlerChange"`
}

Options for `Trigger`.

Example: 

// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import "github.com/aws/aws-cdk-go/awscdk"
import constructs "github.com/aws/constructs-go/constructs"

var construct construct

triggerOptions := &TriggerOptions{
	ExecuteAfter: []*construct{
		construct,
	},
	ExecuteBefore: []*construct{
		construct,
	},
	ExecuteOnHandlerChange: jsii.Boolean(false),
}

type TriggerProps 

type TriggerProps struct {
	// Adds trigger dependencies. Execute this trigger only after these construct scopes have been provisioned.
	//
	// You can also use `trigger.executeAfter()` to add additional dependencies.
	// Default: [].
	//
	ExecuteAfter *[]constructs.Construct `field:"optional" json:"executeAfter" yaml:"executeAfter"`
	// Adds this trigger as a dependency on other constructs.
	//
	// This means that this
	// trigger will get executed *before* the given construct(s).
	//
	// You can also use `trigger.executeBefore()` to add additional dependants.
	// Default: [].
	//
	ExecuteBefore *[]constructs.Construct `field:"optional" json:"executeBefore" yaml:"executeBefore"`
	// Re-executes the trigger every time the handler changes.
	//
	// This implies that the trigger is associated with the `currentVersion` of
	// the handler, which gets recreated every time the handler or its
	// configuration is updated.
	// Default: true.
	//
	ExecuteOnHandlerChange *bool `field:"optional" json:"executeOnHandlerChange" yaml:"executeOnHandlerChange"`
	// The AWS Lambda function of the handler to execute.
	Handler awslambda.Function `field:"required" json:"handler" yaml:"handler"`
	// The invocation type to invoke the Lambda function with.
	// Default: RequestResponse.
	//
	InvocationType InvocationType `field:"optional" json:"invocationType" yaml:"invocationType"`
	// The timeout of the invocation call of the Lambda function to be triggered.
	// Default: Duration.minutes(2)
	//
	Timeout awscdk.Duration `field:"optional" json:"timeout" yaml:"timeout"`
}

Props for `Trigger`.

Example: 

import "github.com/aws/aws-cdk-go/awscdk"

func := lambda.NewFunction(this, jsii.String("MyFunction"), &functionProps{
	Handler: jsii.String("index.handler"),
	Runtime: lambda.Runtime_NODEJS_18_X(),
	Code: lambda.Code_FromInline(jsii.String("foo")),
})

triggers.NewTrigger(this, jsii.String("MyTrigger"), &TriggerProps{
	Handler: func,
	Timeout: awscdk.Duration_Minutes(jsii.Number(10)),
	InvocationType: triggers.InvocationType_EVENT,
})

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