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Showing content from https://docs.aws.amazon.com/sdkforruby/api/Aws/LambdaPreview/Client.html below:

Client — AWS SDK for Ruby V2

You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

An API client for AWS Lambda. To construct a client, you need to configure a :region and :credentials.

lambdapreview = Aws::LambdaPreview::Client.new(
  region: region_name,
  credentials: credentials,
  )

See #initialize for a full list of supported configuration options.

You can configure a default region in the following locations:

• ENV['AWS_REGION']
• Aws.config[:region]

Go here for a list of supported regions.

Default credentials are loaded automatically from the following locations:

• ENV['AWS_ACCESS_KEY_ID'] and ENV['AWS_SECRET_ACCESS_KEY']
• Aws.config[:credentials]
• The shared credentials ini file at ~/.aws/credentials (more information)
• From an instance profile when running on EC2

You can also construct a credentials object from one of the following classes:

• Credentials
• SharedCredentials
• InstanceProfileCredentials
• AssumeRoleCredentials

Alternatively, you configure credentials with :access_key_id and :secret_access_key:

creds = YAML.load(File.read('/path/to/secrets'))

Aws::LambdaPreview::Client.new(
  access_key_id: creds['access_key_id'],
  secret_access_key: creds['secret_access_key']
)

Always load your credentials from outside your application. Avoid configuring credentials statically and never commit them to source control.

#config, #handlers

• #initialize(options = {}) ⇒ Aws::LambdaPreview::Client constructor

  Constructs an API client.

• #add_event_source(options = {}) ⇒ Types::EventSourceConfiguration

  Identifies a stream as an event source for an AWS Lambda function.

• #delete_function(options = {}) ⇒ Struct

  Deletes the specified Lambda function code and configuration.

  This operation requires permission for the lambda:DeleteFunction action.

  .

• #get_event_source(options = {}) ⇒ Types::EventSourceConfiguration

  Returns configuration information for the specified event source mapping (see AddEventSource).

  This operation requires permission for the lambda:GetEventSource action.

  .

• #get_function(options = {}) ⇒ Types::GetFunctionResponse

  Returns the configuration information of the Lambda function and a presigned URL link to the .zip file you uploaded with UploadFunction so you can download the .zip file.

• #get_function_configuration(options = {}) ⇒ Types::FunctionConfiguration

  Returns the configuration information of the Lambda function.

• #invoke_async(options = {}) ⇒ Types::InvokeAsyncResponse

  Submits an invocation request to AWS Lambda.

• #list_event_sources(options = {}) ⇒ Types::ListEventSourcesResponse

  Returns a list of event source mappings you created using the AddEventSource (see AddEventSource), where you identify a stream as event source.

• #list_functions(options = {}) ⇒ Types::ListFunctionsResponse

  Returns a list of your Lambda functions.

• #remove_event_source(options = {}) ⇒ Struct

  Removes an event source mapping.

• #update_function_configuration(options = {}) ⇒ Types::FunctionConfiguration

  Updates the configuration parameters for the specified Lambda function by using the values provided in the request.

• #upload_function(options = {}) ⇒ Types::FunctionConfiguration

  Creates a new Lambda function or updates an existing function.

• #wait_until(waiter_name, params = {}) {|waiter| ... } ⇒ Boolean

  Waiters polls an API operation until a resource enters a desired state.

• #waiter_names ⇒ Array<Symbol>

  Returns the list of supported waiters.

add_plugin, api, #build_request, clear_plugins, define, new, #operation, #operation_names, plugins, remove_plugin, set_api, set_plugins

#handle, #handle_request, #handle_response

Identifies a stream as an event source for an AWS Lambda function. It can be either an Amazon Kinesis stream or a Amazon DynamoDB stream. AWS Lambda invokes the specified function when records are posted to the stream.

This is the pull model, where AWS Lambda invokes the function. For more information, go to AWS Lambda: How it Works in the AWS Lambda Developer Guide.

This association between an Amazon Kinesis stream and an AWS Lambda function is called the event source mapping. You provide the configuration information (for example, which stream to read from and which AWS Lambda function to invoke) for the event source mapping in the request body.

Each event source, such as a Kinesis stream, can only be associated with one AWS Lambda function. If you call AddEventSource for an event source that is already mapped to another AWS Lambda function, the existing mapping is updated to call the new function instead of the old one.

This operation requires permission for the iam:PassRole action for the IAM role. It also requires permission for the lambda:AddEventSource action.

Deletes the specified Lambda function code and configuration.

This operation requires permission for the lambda:DeleteFunction action.

Returns configuration information for the specified event source mapping (see AddEventSource).

This operation requires permission for the lambda:GetEventSource action.

Returns the configuration information of the Lambda function and a presigned URL link to the .zip file you uploaded with UploadFunction so you can download the .zip file. Note that the URL is valid for up to 10 minutes. The configuration information is the same information you provided as parameters when uploading the function.

This operation requires permission for the lambda:GetFunction action.

Returns the configuration information of the Lambda function. This the same information you provided as parameters when uploading the function by using UploadFunction.

This operation requires permission for the lambda:GetFunctionConfiguration operation.

Submits an invocation request to AWS Lambda. Upon receiving the request, Lambda executes the specified function asynchronously. To see the logs generated by the Lambda function execution, see the CloudWatch logs console.

This operation requires permission for the lambda:InvokeFunction action.

Returns a list of event source mappings you created using the AddEventSource (see AddEventSource), where you identify a stream as event source. This list does not include Amazon S3 event sources.

For each mapping, the API returns configuration information. You can optionally specify filters to retrieve specific event source mappings.

This operation requires permission for the lambda:ListEventSources action.

Returns a list of your Lambda functions. For each function, the response includes the function configuration information. You must use GetFunction to retrieve the code for your function.

This operation requires permission for the lambda:ListFunctions action.

Removes an event source mapping. This means AWS Lambda will no longer invoke the function for events in the associated source.

This operation requires permission for the lambda:RemoveEventSource action.

Updates the configuration parameters for the specified Lambda function by using the values provided in the request. You provide only the parameters you want to change. This operation must only be used on an existing Lambda function and cannot be used to update the function's code.

This operation requires permission for the lambda:UpdateFunctionConfiguration action.

Creates a new Lambda function or updates an existing function. The function metadata is created from the request parameters, and the code for the function is provided by a .zip file in the request body. If the function name already exists, the existing Lambda function is updated with the new code and metadata.

This operation requires permission for the lambda:UploadFunction action.

Waiters polls an API operation until a resource enters a desired state.

Waiters will poll until they are succesful, they fail by entering a terminal state, or until a maximum number of attempts are made.

# polls in a loop, sleeping between attempts client.waiter_until(waiter_name, params)

You can configure the maximum number of polling attempts, and the delay (in seconds) between each polling attempt. You configure waiters by passing a block to #wait_until:

# poll for ~25 seconds
client.wait_until(...) do |w|
  w.max_attempts = 5
  w.delay = 5
end

You can be notified before each polling attempt and before each delay. If you throw :success or :failure from these callbacks, it will terminate the waiter.

started_at = Time.now
client.wait_until(...) do |w|

  # disable max attempts
  w.max_attempts = nil

  # poll for 1 hour, instead of a number of attempts
  w.before_wait do |attempts, response|
    throw :failure if Time.now - started_at > 3600
  end

end

When a waiter is successful, it returns true. When a waiter fails, it raises an error. All errors raised extend from Waiters::Errors::WaiterFailed.

begin
  client.wait_until(...)
rescue Aws::Waiters::Errors::WaiterFailed
  # resource did not enter the desired state in time
end

Returns the list of supported waiters. The following table lists the supported waiters and the client method they call:

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