AWS Lambda

Since Camel 2.20

The Lambda component supports create, get, list, delete and invoke AWS Lambda functions.

Prerequisites

You must have a valid Amazon Web Services developer account, and be signed up to use Amazon Lambda. More information are available at Amazon Lambda.

When creating a Lambda function, you need to specify a IAM role which has at least the AWSLambdaBasicExecuteRole policy attached.

Warning

Lambda is regional service. Unlike S3 bucket, Lambda function created in a given region is not available on other regions.

URI Format

aws-lambda://functionName[?options]

You can append query options to the URI in the following format, ?options=value&option2=value&…​

URI Options

The AWS Lambda component supports 5 options, which are listed below.

Name Description Default Type

configuration (advanced)

The AWS Lambda default configuration

LambdaConfiguration

accessKey (producer)

Amazon AWS Access Key

String

secretKey (producer)

Amazon AWS Secret Key

String

region (producer)

Amazon AWS Region

String

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

The AWS Lambda endpoint is configured using URI syntax:

aws-lambda:function

with the following path and query parameters:

Path Parameters (1 parameters):

Name Description Default Type

function

Required Name of the Lambda function.

String

Query Parameters (8 parameters):

Name Description Default Type

operation (producer)

Required The operation to perform. It can be listFunctions, getFunction, createFunction, deleteFunction or invokeFunction

LambdaOperations

region (producer)

Amazon AWS Region

String

awsLambdaClient (advanced)

To use a existing configured AwsLambdaClient as client

AWSLambda

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

proxyHost (proxy)

To define a proxy host when instantiating the Lambda client

String

proxyPort (proxy)

To define a proxy port when instantiating the Lambda client

Integer

accessKey (security)

Amazon AWS Access Key

String

secretKey (security)

Amazon AWS Secret Key

String

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-aws-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 13 options, which are listed below.

Name Description Default Type

camel.component.aws-lambda.access-key

Amazon AWS Access Key

String

camel.component.aws-lambda.configuration.access-key

Amazon AWS Access Key

String

camel.component.aws-lambda.configuration.aws-lambda-client

To use a existing configured AwsLambdaClient as client

AWSLambda

camel.component.aws-lambda.configuration.function

Name of the Lambda function.

String

camel.component.aws-lambda.configuration.operation

The operation to perform. It can be listFunctions, getFunction, createFunction, deleteFunction or invokeFunction

LambdaOperations

camel.component.aws-lambda.configuration.proxy-host

To define a proxy host when instantiating the Lambda client

String

camel.component.aws-lambda.configuration.proxy-port

To define a proxy port when instantiating the Lambda client

Integer

camel.component.aws-lambda.configuration.region

Amazon AWS Region

String

camel.component.aws-lambda.configuration.secret-key

Amazon AWS Secret Key

String

camel.component.aws-lambda.enabled

Whether to enable auto configuration of the aws-lambda component. This is enabled by default.

Boolean

camel.component.aws-lambda.region

Amazon AWS Region

String

camel.component.aws-lambda.resolve-property-placeholders

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

Boolean

camel.component.aws-lambda.secret-key

Amazon AWS Secret Key

String

Required Lambda component options

You have to provide the awsLambdaClient in the Registry or your accessKey and secretKey to access the Amazon Lambda service.

Usage

Message headers evaluated by the Lambda producer

Operation Header Type Description Required

All

CamelAwsLambdaOperation

String

The operation we want to perform. Override operation passed as query parameter

Yes

createFunction

CamelAwsLambdaS3Bucket

String

Amazon S3 bucket name where the .zip file containing your deployment package is stored. This bucket must reside in the same AWS region where you are creating the Lambda function.

No

createFunction

CamelAwsLambdaS3Key

String

The Amazon S3 object (the deployment package) key name you want to upload.

No

createFunction

CamelAwsLambdaS3ObjectVersion

String

The Amazon S3 object (the deployment package) version you want to upload.

No

createFunction

CamelAwsLambdaZipFile

String

The local path of the zip file (the deployment package). Content of zip file can also be put in Message body.

No

createFunction

CamelAwsLambdaRole

String

The Amazon Resource Name (ARN) of the IAM role that Lambda assumes when it executes your function to access any other Amazon Web Services (AWS) resources.

Yes

createFunction

CamelAwsLambdaRuntime

String

The runtime environment for the Lambda function you are uploading. (nodejs, nodejs4.3, nodejs6.10, java8, python2.7, python3.6, dotnetcore1.0, odejs4.3-edge)

Yes

createFunction

CamelAwsLambdaHandler

String

The function within your code that Lambda calls to begin execution. For Node.js, it is the module-name.export value in your function. For Java, it can be package.class-name::handler or package.class-name.

Yes

createFunction

CamelAwsLambdaDescription

String

The user-provided description.

No

createFunction

CamelAwsLambdaTargetArn

String

The parent object that contains the target ARN (Amazon Resource Name) of an Amazon SQS queue or Amazon SNS topic.

No

createFunction

CamelAwsLambdaMemorySize

Integer

The memory size, in MB, you configured for the function. Must be a multiple of 64 MB.

No

createFunction

CamelAwsLambdaKMSKeyArn

String

The Amazon Resource Name (ARN) of the KMS key used to encrypt your function’s environment variables. If not provided, AWS Lambda will use a default service key.

No

createFunction

CamelAwsLambdaPublish

Boolean

This boolean parameter can be used to request AWS Lambda to create the Lambda function and publish a version as an atomic operation.

No

createFunction

CamelAwsLambdaTimeout

Integer

The function execution time at which Lambda should terminate the function. The default is 3 seconds.

No

createFunction

CamelAwsLambdaTracingConfig

String

Your function’s tracing settings (Active or PassThrough).

No

createFunction

CamelAwsLambdaEnvironmentVariables

Map<String, String>

The key-value pairs that represent your environment’s configuration settings.

No

createFunction

CamelAwsLambdaEnvironmentTags

Map<String, String>

The list of tags (key-value pairs) assigned to the new function.

No

createFunction

CamelAwsLambdaSecurityGroupIds

List<String>

If your Lambda function accesses resources in a VPC, a list of one or more security groups IDs in your VPC.

No

createFunction

CamelAwsLambdaSubnetIds

List<String>

If your Lambda function accesses resources in a VPC, a list of one or more subnet IDs in your VPC.

No

List of Avalaible Operations

  • listFunctions

  • getFunction,

  • createFunction

  • deleteFunction

  • invokeFunction

  • updateFunction

  • createEventSourceMapping

  • deleteEventSourceMapping

  • listEventSourceMapping

Example

To have a full understanding of how the component works, you may have a look at this integration test

Dependencies

Maven users will need to add the following dependency to their pom.xml.

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel (2.16 or higher).

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