AWS Lambda

Since Camel 3.2

Only producer is supported

The AWS2 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 is available at AWS Lambda.

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

URI Format

aws2-lambda://functionName[?options]

You can append query options to the URI in the following format:

?options=value&option2=value&…​

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

At the component level, you set general and shared configurations that are, then, inherited by the endpoints. It is the highest configuration level.

For example, a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre-configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

You can configure components using:

  • the Component DSL.

  • in a configuration file (application.properties, *.yaml files, etc).

  • directly in the Java code.

Configuring Endpoint Options

You usually spend more time setting up endpoints because they have many options. These options help you customize what you want the endpoint to do. The options are also categorized into whether the endpoint is used as a consumer (from), as a producer (to), or both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL and DataFormat DSL as a type safe way of configuring endpoints and data formats in Java.

A good practice when configuring options is to use Property Placeholders.

Property placeholders provide a few benefits:

  • They help prevent using hardcoded urls, port numbers, sensitive information, and other settings.

  • They allow externalizing the configuration from the code.

  • They help the code to become more flexible and reusable.

The following two sections list all the options, firstly for the component followed by the endpoint.

Component Options

The AWS Lambda component supports 22 options, which are listed below.

Name Description Default Type

configuration (producer)

Component configuration.

Lambda2Configuration

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

operation (producer)

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

Enum values:

  • listFunctions

  • getFunction

  • createAlias

  • deleteAlias

  • getAlias

  • listAliases

  • createFunction

  • deleteFunction

  • invokeFunction

  • updateFunction

  • createEventSourceMapping

  • deleteEventSourceMapping

  • listEventSourceMapping

  • listTags

  • tagResource

  • untagResource

  • publishVersion

  • listVersions

invokeFunction

Lambda2Operations

overrideEndpoint (producer)

Set the need for overriding the endpoint. This option needs to be used in combination with the uriEndpointOverride option.

false

boolean

pojoRequest (producer)

If we want to use a POJO request as body or not.

false

boolean

region (producer)

The region in which the Lambda client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example, ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

Enum values:

  • ap-south-2

  • ap-south-1

  • eu-south-1

  • eu-south-2

  • us-gov-east-1

  • me-central-1

  • il-central-1

  • ca-central-1

  • eu-central-1

  • us-iso-west-1

  • eu-central-2

  • eu-isoe-west-1

  • us-west-1

  • us-west-2

  • af-south-1

  • eu-north-1

  • eu-west-3

  • eu-west-2

  • eu-west-1

  • ap-northeast-3

  • ap-northeast-2

  • ap-northeast-1

  • me-south-1

  • sa-east-1

  • ap-east-1

  • cn-north-1

  • ca-west-1

  • us-gov-west-1

  • ap-southeast-1

  • ap-southeast-2

  • us-iso-east-1

  • ap-southeast-3

  • ap-southeast-4

  • us-east-1

  • us-east-2

  • cn-northwest-1

  • us-isob-east-1

  • aws-global

  • aws-cn-global

  • aws-us-gov-global

  • aws-iso-global

  • aws-iso-b-global

String

uriEndpointOverride (producer)

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

boolean

awsLambdaClient (advanced)

Autowired To use an existing configured AwsLambdaClient client.

LambdaClient

healthCheckConsumerEnabled (health)

Used for enabling or disabling all consumer based health checks from this component.

true

boolean

healthCheckProducerEnabled (health)

Used for enabling or disabling all producer based health checks from this component. Notice: Camel has by default disabled all producer based health-checks. You can turn on producer checks globally by setting camel.health.producersEnabled=true.

true

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

proxyProtocol (proxy)

To define a proxy protocol when instantiating the Lambda client.

Enum values:

  • HTTP

  • HTTPS

HTTPS

Protocol

accessKey (security)

Amazon AWS Access Key.

String

profileCredentialsName (security)

If using a profile credentials provider, this parameter will set the profile name.

String

secretKey (security)

Amazon AWS Secret Key.

String

sessionToken (security)

Amazon AWS Session Token used when the user needs to assume an IAM role.

String

trustAllCertificates (security)

If we want to trust all certificates in case of overriding the endpoint.

false

boolean

useDefaultCredentialsProvider (security)

Set whether the Lambda client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

false

boolean

useProfileCredentialsProvider (security)

Set whether the Lambda client should expect to load credentials through a profile credentials provider.

false

boolean

useSessionCredentials (security)

Set whether the Lambda client should expect to use Session Credentials. This is useful in a situation in which the user needs to assume an IAM role for doing operations in Lambda.

false

boolean

Endpoint Options

The AWS Lambda endpoint is configured using URI syntax:

aws2-lambda:function

With the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

function (producer)

Required Name of the Lambda function.

String

Query Parameters (18 parameters)

Name Description Default Type

operation (producer)

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

Enum values:

  • listFunctions

  • getFunction

  • createAlias

  • deleteAlias

  • getAlias

  • listAliases

  • createFunction

  • deleteFunction

  • invokeFunction

  • updateFunction

  • createEventSourceMapping

  • deleteEventSourceMapping

  • listEventSourceMapping

  • listTags

  • tagResource

  • untagResource

  • publishVersion

  • listVersions

invokeFunction

Lambda2Operations

overrideEndpoint (producer)

Set the need for overriding the endpoint. This option needs to be used in combination with the uriEndpointOverride option.

false

boolean

pojoRequest (producer)

If we want to use a POJO request as body or not.

false

boolean

region (producer)

The region in which the Lambda client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example, ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

Enum values:

  • ap-south-2

  • ap-south-1

  • eu-south-1

  • eu-south-2

  • us-gov-east-1

  • me-central-1

  • il-central-1

  • ca-central-1

  • eu-central-1

  • us-iso-west-1

  • eu-central-2

  • eu-isoe-west-1

  • us-west-1

  • us-west-2

  • af-south-1

  • eu-north-1

  • eu-west-3

  • eu-west-2

  • eu-west-1

  • ap-northeast-3

  • ap-northeast-2

  • ap-northeast-1

  • me-south-1

  • sa-east-1

  • ap-east-1

  • cn-north-1

  • ca-west-1

  • us-gov-west-1

  • ap-southeast-1

  • ap-southeast-2

  • us-iso-east-1

  • ap-southeast-3

  • ap-southeast-4

  • us-east-1

  • us-east-2

  • cn-northwest-1

  • us-isob-east-1

  • aws-global

  • aws-cn-global

  • aws-us-gov-global

  • aws-iso-global

  • aws-iso-b-global

String

uriEndpointOverride (producer)

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

lazyStartProducer (producer (advanced))

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

awsLambdaClient (advanced)

Autowired To use an existing configured AwsLambdaClient client.

LambdaClient

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

proxyProtocol (proxy)

To define a proxy protocol when instantiating the Lambda client.

Enum values:

  • HTTP

  • HTTPS

HTTPS

Protocol

accessKey (security)

Amazon AWS Access Key.

String

profileCredentialsName (security)

If using a profile credentials provider, this parameter will set the profile name.

String

secretKey (security)

Amazon AWS Secret Key.

String

sessionToken (security)

Amazon AWS Session Token used when the user needs to assume an IAM role.

String

trustAllCertificates (security)

If we want to trust all certificates in case of overriding the endpoint.

false

boolean

useDefaultCredentialsProvider (security)

Set whether the Lambda client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

false

boolean

useProfileCredentialsProvider (security)

Set whether the Lambda client should expect to load credentials through a profile credentials provider.

false

boolean

useSessionCredentials (security)

Set whether the Lambda client should expect to use Session Credentials. This is useful in a situation in which the user needs to assume an IAM role for doing operations in Lambda.

false

boolean

Required Lambda component options

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

Message Headers

The AWS Lambda component supports 30 message header(s), which is/are listed below:

Name Description Default Type

CamelAwsLambdaOperation (all)

Constant: OPERATION

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

String

CamelAwsLambdaS3Bucket (createFunction)

Constant: S3_BUCKET

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.

String

CamelAwsLambdaS3Key (createFunction)

Constant: S3_KEY

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

String

CamelAwsLambdaS3ObjectVersion (createFunction)

Constant: S3_OBJECT_VERSION

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

String

CamelAwsLambdaZipFile (createFunction)

Constant: ZIP_FILE

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

String

CamelAwsLambdaDescription (createFunction)

Constant: DESCRIPTION

The user-provided description.

String

CamelAwsLambdaRole (createFunction)

Constant: ROLE

Required 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.

String

CamelAwsLambdaRuntime (createFunction)

Constant: RUNTIME

Required 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).

String

CamelAwsLambdaHandler (createFunction)

Constant: HANDLER

Required 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.

String

CamelAwsLambdaTargetArn (createFunction)

Constant: TARGET_ARN

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

String

CamelAwsLambdaMemorySize (createFunction)

Constant: MEMORY_SIZE

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

Integer

CamelAwsLambdaKMSKeyArn (createFunction)

Constant: KMS_KEY_ARN

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.

String

CamelAwsLambdaEnvironmentVariables (createFunction)

Constant: ENVIRONMENT_VARIABLES

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

Map

CamelAwsLambdaPublish (createFunction updateFunction)

Constant: PUBLISH

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

Boolean

CamelAwsLambdaTimeout (createFunction)

Constant: TIMEOUT

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

Integer

CamelAwsLambdaTags (createFunction)

Constant: TAGS

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

Map

CamelAwsLambdaTracingConfig (createFunction)

Constant: TRACING_CONFIG

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

String

CamelAwsLambdaSecurityGroupIds (createFunction)

Constant: SECURITY_GROUP_IDS

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

List

CamelAwsLambdaSubnetIds (createFunction)

Constant: SUBNET_IDS

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

List

CamelAwsLambdaEventSourceArn (createEventSourceMapping)

Constant: EVENT_SOURCE_ARN

The Amazon Resource Name (ARN) of the event source.

String

CamelAwsLambdaEventSourceBatchSize (createEventSourceMapping)

Constant: EVENT_SOURCE_BATCH_SIZE

The maximum number of records in each batch that Lambda pulls from your stream or queue and sends to your function.

Integer

CamelAwsLambdaEventSourceUuid (deleteEventSourceMapping)

Constant: EVENT_SOURCE_UUID

The identifier of the event source mapping.

String

CamelAwsLambdaResourceArn (listTags tagResource untagResource)

Constant: RESOURCE_ARN

The function’s Amazon Resource Name (ARN).

String

CamelAwsLambdaResourceTags (tagResource)

Constant: RESOURCE_TAGS

A list of tags to apply to the function.

Map

CamelAwsLambdaResourceTagKeys (untagResource)

Constant: RESOURCE_TAG_KEYS

A list of tag keys to remove from the function.

List

CamelAwsLambdaVersionDescription (publishVersion)

Constant: VERSION_DESCRIPTION

A description for the version to override the description in the function configuration.

String

CamelAwsLambdaVersionRevisionId (publishVersion)

Constant: VERSION_REVISION_ID

Only update the function if the revision ID matches the ID that’s specified.

String

CamelAwsLambdaFunctionVersion (createAlias listAliases)

Constant: FUNCTION_VERSION

The function version to set in the alias.

String

CamelAwsLambdaAliasFunctionName (createAlias deleteAlias getAlias)

Constant: FUNCTION_ALIAS_NAME

Required The function name of the alias.

String

CamelAwsLambdaAliasFunctionDescription (createAlias)

Constant: FUNCTION_ALIAS_DESCRIPTION

The function description to set in the alias.

String

Usage

Static credentials, Default Credential Provider and Profile Credentials Provider

You have the possibility of avoiding the usage of explicit static credentials by specifying the useDefaultCredentialsProvider option and set it to true.

The order of evaluation for Default Credentials Provider is the following:

  • Java system properties - aws.accessKeyId and aws.secretKey.

  • Environment variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.

  • Web Identity Token from AWS STS.

  • The shared credentials and config files.

  • Amazon ECS container credentials - loaded from the Amazon ECS if the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI is set.

  • Amazon EC2 Instance profile credentials.

You have also the possibility of using Profile Credentials Provider, by specifying the useProfileCredentialsProvider option to true and profileCredentialsName to the profile name.

Only one of static, default and profile credentials could be used at the same time.

For more information about this you can look at AWS credentials documentation

List of Available Operations

  • listFunctions

  • getFunction

  • createFunction

  • deleteFunction

  • invokeFunction

  • updateFunction

  • createEventSourceMapping

  • deleteEventSourceMapping

  • listEventSourceMapping

  • listTags

  • tagResource

  • untagResource

  • publishVersion

  • listVersions

  • createAlias

  • deleteAlias

  • getAlias

  • listAliases

Examples

Producer Example

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

Producer Examples

  • CreateFunction: this operation will create a function for you in AWS Lambda

  from("direct:createFunction").to("aws2-lambda://GetHelloWithName?operation=createFunction").to("mock:result");

and by sending

        template.send("direct:createFunction", ExchangePattern.InOut, new Processor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                exchange.getIn().setHeader(Lambda2Constants.RUNTIME, "nodejs6.10");
                exchange.getIn().setHeader(Lambda2Constants.HANDLER, "GetHelloWithName.handler");
                exchange.getIn().setHeader(Lambda2Constants.DESCRIPTION, "Hello with node.js on Lambda");
                exchange.getIn().setHeader(Lambda2Constants.ROLE,
                        "arn:aws:iam::643534317684:role/lambda-execution-role");

                ClassLoader classLoader = getClass().getClassLoader();
                File file = new File(
                        classLoader
                                .getResource("org/apache/camel/component/aws2/lambda/function/node/GetHelloWithName.zip")
                                .getFile());
                FileInputStream inputStream = new FileInputStream(file);
                exchange.getIn().setBody(inputStream);
            }
        });

Using a POJO as body

Sometimes building an AWS Request can be complex because of multiple options. We introduce the possibility to use a POJO as the body. In AWS Lambda there are multiple operations you can submit, as an example for Get Function request, you can do something like:

from("direct:getFunction")
     .setBody(GetFunctionRequest.builder().functionName("test").build())
     .to("aws2-lambda://GetHelloWithName?awsLambdaClient=#awsLambdaClient&operation=getFunction&pojoRequest=true")

In this way, you’ll pass the request directly without the need of passing headers and options specifically related to this operation.

Dependencies

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

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws2-lambda</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel.

Spring Boot Auto-Configuration

When using aws2-lambda with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-aws2-lambda-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 23 options, which are listed below.

Name Description Default Type

camel.component.aws2-lambda.access-key

Amazon AWS Access Key.

String

camel.component.aws2-lambda.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.aws2-lambda.aws-lambda-client

To use an existing configured AwsLambdaClient client. The option is a software.amazon.awssdk.services.lambda.LambdaClient type.

LambdaClient

camel.component.aws2-lambda.configuration

Component configuration. The option is a org.apache.camel.component.aws2.lambda.Lambda2Configuration type.

Lambda2Configuration

camel.component.aws2-lambda.enabled

Whether to enable auto configuration of the aws2-lambda component. This is enabled by default.

Boolean

camel.component.aws2-lambda.health-check-consumer-enabled

Used for enabling or disabling all consumer based health checks from this component.

true

Boolean

camel.component.aws2-lambda.health-check-producer-enabled

Used for enabling or disabling all producer based health checks from this component. Notice: Camel has by default disabled all producer based health-checks. You can turn on producer checks globally by setting camel.health.producersEnabled=true.

true

Boolean

camel.component.aws2-lambda.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean

camel.component.aws2-lambda.operation

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

Lambda2Operations

camel.component.aws2-lambda.override-endpoint

Set the need for overriding the endpoint. This option needs to be used in combination with the uriEndpointOverride option.

false

Boolean

camel.component.aws2-lambda.pojo-request

If we want to use a POJO request as body or not.

false

Boolean

camel.component.aws2-lambda.profile-credentials-name

If using a profile credentials provider, this parameter will set the profile name.

String

camel.component.aws2-lambda.proxy-host

To define a proxy host when instantiating the Lambda client.

String

camel.component.aws2-lambda.proxy-port

To define a proxy port when instantiating the Lambda client.

Integer

camel.component.aws2-lambda.proxy-protocol

To define a proxy protocol when instantiating the Lambda client.

Protocol

camel.component.aws2-lambda.region

The region in which the Lambda client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example, ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

String

camel.component.aws2-lambda.secret-key

Amazon AWS Secret Key.

String

camel.component.aws2-lambda.session-token

Amazon AWS Session Token used when the user needs to assume an IAM role.

String

camel.component.aws2-lambda.trust-all-certificates

If we want to trust all certificates in case of overriding the endpoint.

false

Boolean

camel.component.aws2-lambda.uri-endpoint-override

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

camel.component.aws2-lambda.use-default-credentials-provider

Set whether the Lambda client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

false

Boolean

camel.component.aws2-lambda.use-profile-credentials-provider

Set whether the Lambda client should expect to load credentials through a profile credentials provider.

false

Boolean

camel.component.aws2-lambda.use-session-credentials

Set whether the Lambda client should expect to use Session Credentials. This is useful in a situation in which the user needs to assume an IAM role for doing operations in Lambda.

false

Boolean
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