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Chapter 27. AWS Lambda Component
Available as of Camel version 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.
27.1. URI Format
aws-lambda://functionName[?options]
You can append query options to the URI in the following format, ?options=value&option2=value&…
27.2. 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:
27.2.1. Path Parameters (1 parameters):
Name | Description | Default | Type |
---|---|---|---|
function | Required Name of the Lambda function. | String |
27.2.2. 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 |
Required Lambda component options
You have to provide the awsLambdaClient in the Registry or your accessKey and secretKey to access the Amazon Lambda service.
27.3. Usage
27.3.1. Message headers evaluated by the Lambda producer
Operation | Header | Type | Description | Required |
---|---|---|---|---|
All |
|
| The operation we want to perform. Override operation passed as query parameter | Yes |
createFunction |
|
| 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 |
|
| The Amazon S3 object (the deployment package) key name you want to upload. | No |
createFunction |
| String | The Amazon S3 object (the deployment package) version you want to upload. | No |
createFunction |
|
| The local path of the zip file (the deployment package). Content of zip file can also be put in Message body. | No |
createFunction |
|
| 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 |
| 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 |
|
| 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 |
|
| The user-provided description. | No |
createFunction |
|
| The parent object that contains the target ARN (Amazon Resource Name) of an Amazon SQS queue or Amazon SNS topic. | No |
createFunction |
|
| The memory size, in MB, you configured for the function. Must be a multiple of 64 MB. | No |
createFunction |
|
| 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 |
|
| 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 |
|
| The function execution time at which Lambda should terminate the function. The default is 3 seconds. | No |
createFunction |
|
| Your function’s tracing settings (Active or PassThrough). | No |
createFunction |
|
| The key-value pairs that represent your environment’s configuration settings. | No |
createFunction |
|
| The list of tags (key-value pairs) assigned to the new function. | No |
createFunction |
|
| If your Lambda function accesses resources in a VPC, a list of one or more security groups IDs in your VPC. | No |
createFunction |
|
| If your Lambda function accesses resources in a VPC, a list of one or more subnet IDs in your VPC. | No |
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).
27.4. See Also
- Configuring Camel
- Component
- Endpoint
- Getting Started
- AWS Component