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 a 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

The component level is the highest level which holds general and common configurations that are inherited by the endpoints. 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.

Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.

Configuring Endpoint Options

Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.

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

A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.

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

Component Options

The AWS Lambda component supports 16 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.

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 overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option.

boolean

pojoRequest (producer)

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

boolean

region (producer)

The region in which 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

trustAllCertificates (producer)

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

boolean

uriEndpointOverride (producer)

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

String

useDefaultCredentialsProvider (producer)

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

boolean

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 a existing configured AwsLambdaClient as 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

secretKey (security)

Amazon AWS Secret Key.

String

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 (14 parameters)

Name Description Default Type

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.

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 overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option.

boolean

pojoRequest (producer)

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

boolean

region (producer)

The region in which 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

trustAllCertificates (producer)

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

boolean

uriEndpointOverride (producer)

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

String

useDefaultCredentialsProvider (producer)

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

boolean

awsLambdaClient (advanced)

Autowired To use a existing configured AwsLambdaClient as 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

secretKey (security)

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

Static credentials vs Default Credential Provider

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

  • 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.

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

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

createAlias

CamelAwsLambdaFunctionVersion

String

The function version to set in the alias

Yes

createAlias

CamelAwsLambdaAliasFunctionName

String

The function name to set in the alias

Yes

createAlias

CamelAwsLambdaAliasFunctionDescription

String

The function description to set in the alias

No

deleteAlias

CamelAwsLambdaAliasFunctionName

String

The function name of the alias

Yes

getAlias

CamelAwsLambdaAliasFunctionName

String

The function name of the alias

Yes

listAliases

CamelAwsLambdaFunctionVersion

String

The function version to set in the alias

No

List of Avalaible 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 build an AWS Request can be complex, because of multiple options. We introduce the possibility to use a POJO as 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 17 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 a existing configured AwsLambdaClient as 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.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 overidding the endpoint. This option needs to be used in combination with 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.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 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.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
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