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Class: Aws::LambdaPreview::Client

Inherits:
Seahorse::Client::Base show all
Defined in:
(unknown)

Overview

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.

Region

You can configure a default region in the following locations:

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

Go here for a list of supported regions.

Credentials

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:

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

# load credentials from disk
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.

Instance Attribute Summary

Attributes inherited from Seahorse::Client::Base

#config, #handlers

Constructor collapse

API Operations collapse

Instance Method Summary collapse

Methods inherited from Seahorse::Client::Base

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

Methods included from Seahorse::Client::HandlerBuilder

#handle, #handle_request, #handle_response

Constructor Details

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

Constructs an API client.

Options Hash (options):

  • :access_key_id (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :convert_params (Boolean) — default: true

    When true, an attempt is made to coerce request parameters into the required types. See Plugins::ParamConverter for more details.

  • :credentials (required, Credentials)

    Your AWS credentials. The following locations will be searched in order for credentials:

    • :access_key_id, :secret_access_key, and :session_token options
    • ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
    • HOME/.aws/credentials shared credentials file
    • EC2 instance profile credentials See Plugins::RequestSigner for more details.
  • :endpoint (String)

    A default endpoint is constructed from the :region. See Plugins::RegionalEndpoint for more details.

  • :http_continue_timeout (Float) — default: 1

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_idle_timeout (Integer) — default: 5

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_open_timeout (Integer) — default: 15

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_proxy (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_read_timeout (Integer) — default: 60

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_wire_trace (Boolean) — default: false

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :log_level (Symbol) — default: :info

    The log level to send messages to the logger at. See Plugins::Logging for more details.

  • :log_formatter (Logging::LogFormatter)

    The log formatter. Defaults to Seahorse::Client::Logging::Formatter.default. See Plugins::Logging for more details.

  • :logger (Logger) — default: nil

    The Logger instance to send log messages to. If this option is not set, logging will be disabled. See Plugins::Logging for more details.

  • :profile (String)

    Used when loading credentials from the shared credentials file at HOME/.aws/credentials. When not specified, 'default' is used. See Plugins::RequestSigner for more details.

  • :raise_response_errors (Boolean) — default: true

    When true, response errors are raised. See Seahorse::Client::Plugins::RaiseResponseErrors for more details.

  • :region (required, String)

    The AWS region to connect to. The region is used to construct the client endpoint. Defaults to ENV['AWS_REGION']. Also checks AMAZON_REGION and AWS_DEFAULT_REGION. See Plugins::RegionalEndpoint for more details.

  • :retry_limit (Integer) — default: 3

    The maximum number of times to retry failed requests. Only ~ 500 level server errors and certain ~ 400 level client errors are retried. Generally, these are throttling errors, data checksum errors, networking errors, timeout errors and auth errors from expired credentials. See Plugins::RetryErrors for more details.

  • :secret_access_key (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :session_token (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :ssl_ca_bundle (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_ca_directory (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_ca_store (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_verify_peer (Boolean) — default: true

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :stub_responses (Boolean) — default: false

    Causes the client to return stubbed responses. By default fake responses are generated and returned. You can specify the response data to return or errors to raise by calling ClientStubs#stub_responses. See ClientStubs for more information.

    Please note When response stubbing is enabled, no HTTP requests are made, and retries are disabled. See Plugins::StubResponses for more details.

  • :validate_params (Boolean) — default: true

    When true, request parameters are validated before sending the request. See Plugins::ParamValidator for more details.

Instance Method Details

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

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.

Examples:

Request syntax with placeholder values


resp = client.add_event_source({
  event_source: "String", # required
  function_name: "FunctionName", # required
  role: "RoleArn", # required
  batch_size: 1,
  parameters: {
    "String" => "String",
  },
})

Response structure


resp.uuid #=> String
resp.batch_size #=> Integer
resp.event_source #=> String
resp.function_name #=> String
resp.parameters #=> Hash
resp.parameters["String"] #=> String
resp.role #=> String
resp.last_modified #=> Time
resp.is_active #=> true/false
resp.status #=> String

Options Hash (options):

  • :event_source (required, String)

    The Amazon Resource Name (ARN) of the Amazon Kinesis stream that is the event source. Any record added to this stream causes AWS Lambda to invoke your Lambda function. AWS Lambda POSTs the Amazon Kinesis event, containing records, to your Lambda function as JSON.

  • :function_name (required, String)

    The Lambda function to invoke when AWS Lambda detects an event on the stream.

  • :role (required, String)

    The ARN of the IAM role (invocation role) that AWS Lambda can assume to read from the stream and invoke the function.

  • :batch_size (Integer)

    The largest number of records that AWS Lambda will give to your function in a single event. The default is 100 records.

  • :parameters (Hash<String,String>)

    A map (key-value pairs) defining the configuration for AWS Lambda to use when reading the event source. Currently, AWS Lambda supports only the InitialPositionInStream key. The valid values are: \"TRIM_HORIZON\" and \"LATEST\". The default value is \"TRIM_HORIZON\". For more information, go to ShardIteratorType in the Amazon Kinesis Service API Reference.

Returns:

See Also:

#delete_function(options = {}) ⇒ Struct

Deletes the specified Lambda function code and configuration.

This operation requires permission for the lambda:DeleteFunction action.

Examples:

Request syntax with placeholder values


resp = client.delete_function({
  function_name: "FunctionName", # required
})

Options Hash (options):

  • :function_name (required, String)

    The Lambda function to delete.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#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.

Examples:

Request syntax with placeholder values


resp = client.get_event_source({
  uuid: "String", # required
})

Response structure


resp.uuid #=> String
resp.batch_size #=> Integer
resp.event_source #=> String
resp.function_name #=> String
resp.parameters #=> Hash
resp.parameters["String"] #=> String
resp.role #=> String
resp.last_modified #=> Time
resp.is_active #=> true/false
resp.status #=> String

Options Hash (options):

  • :uuid (required, String)

    The AWS Lambda assigned ID of the event source mapping.

Returns:

See Also:

#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. 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.

Examples:

Request syntax with placeholder values


resp = client.get_function({
  function_name: "FunctionName", # required
})

Response structure


resp.configuration.function_name #=> String
resp.configuration.function_arn #=> String
resp.configuration.configuration_id #=> String
resp.configuration.runtime #=> String, one of "nodejs"
resp.configuration.role #=> String
resp.configuration.handler #=> String
resp.configuration.mode #=> String, one of "event"
resp.configuration.code_size #=> Integer
resp.configuration.description #=> String
resp.configuration.timeout #=> Integer
resp.configuration.memory_size #=> Integer
resp.configuration.last_modified #=> Time
resp.code.repository_type #=> String
resp.code.location #=> String

Options Hash (options):

  • :function_name (required, String)

    The Lambda function name.

Returns:

See Also:

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

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.

Examples:

Request syntax with placeholder values


resp = client.get_function_configuration({
  function_name: "FunctionName", # required
})

Response structure


resp.function_name #=> String
resp.function_arn #=> String
resp.configuration_id #=> String
resp.runtime #=> String, one of "nodejs"
resp.role #=> String
resp.handler #=> String
resp.mode #=> String, one of "event"
resp.code_size #=> Integer
resp.description #=> String
resp.timeout #=> Integer
resp.memory_size #=> Integer
resp.last_modified #=> Time

Options Hash (options):

  • :function_name (required, String)

    The name of the Lambda function for which you want to retrieve the configuration information.

Returns:

See Also:

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

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.

Examples:

Request syntax with placeholder values


resp = client.invoke_async({
  function_name: "FunctionName", # required
  invoke_args: source_file, # file/IO object, or string data, required
})

Response structure


resp.status #=> Integer

Options Hash (options):

  • :function_name (required, String)

    The Lambda function name.

  • :invoke_args (required, IO, String)

    JSON that you want to provide to your Lambda function as input.

Returns:

See Also:

#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. 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.

Examples:

Request syntax with placeholder values


resp = client.list_event_sources({
  event_source_arn: "String",
  function_name: "FunctionName",
  marker: "String",
  max_items: 1,
})

Response structure


resp.next_marker #=> String
resp.event_sources #=> Array
resp.event_sources[0].uuid #=> String
resp.event_sources[0].batch_size #=> Integer
resp.event_sources[0].event_source #=> String
resp.event_sources[0].function_name #=> String
resp.event_sources[0].parameters #=> Hash
resp.event_sources[0].parameters["String"] #=> String
resp.event_sources[0].role #=> String
resp.event_sources[0].last_modified #=> Time
resp.event_sources[0].is_active #=> true/false
resp.event_sources[0].status #=> String

Options Hash (options):

  • :event_source_arn (String)

    The Amazon Resource Name (ARN) of the Amazon Kinesis stream.

  • :function_name (String)

    The name of the AWS Lambda function.

  • :marker (String)

    Optional string. An opaque pagination token returned from a previous ListEventSources operation. If present, specifies to continue the list from where the returning call left off.

  • :max_items (Integer)

    Optional integer. Specifies the maximum number of event sources to return in response. This value must be greater than 0.

Returns:

See Also:

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

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.

Examples:

Request syntax with placeholder values


resp = client.list_functions({
  marker: "String",
  max_items: 1,
})

Response structure


resp.next_marker #=> String
resp.functions #=> Array
resp.functions[0].function_name #=> String
resp.functions[0].function_arn #=> String
resp.functions[0].configuration_id #=> String
resp.functions[0].runtime #=> String, one of "nodejs"
resp.functions[0].role #=> String
resp.functions[0].handler #=> String
resp.functions[0].mode #=> String, one of "event"
resp.functions[0].code_size #=> Integer
resp.functions[0].description #=> String
resp.functions[0].timeout #=> Integer
resp.functions[0].memory_size #=> Integer
resp.functions[0].last_modified #=> Time

Options Hash (options):

  • :marker (String)

    Optional string. An opaque pagination token returned from a previous ListFunctions operation. If present, indicates where to continue the listing.

  • :max_items (Integer)

    Optional integer. Specifies the maximum number of AWS Lambda functions to return in response. This parameter value must be greater than 0.

Returns:

See Also:

#remove_event_source(options = {}) ⇒ Struct

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.

Examples:

Request syntax with placeholder values


resp = client.remove_event_source({
  uuid: "String", # required
})

Options Hash (options):

  • :uuid (required, String)

    The event source mapping ID.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

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

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.

Examples:

Request syntax with placeholder values


resp = client.update_function_configuration({
  function_name: "FunctionName", # required
  role: "RoleArn",
  handler: "Handler",
  description: "Description",
  timeout: 1,
  memory_size: 1,
})

Response structure


resp.function_name #=> String
resp.function_arn #=> String
resp.configuration_id #=> String
resp.runtime #=> String, one of "nodejs"
resp.role #=> String
resp.handler #=> String
resp.mode #=> String, one of "event"
resp.code_size #=> Integer
resp.description #=> String
resp.timeout #=> Integer
resp.memory_size #=> Integer
resp.last_modified #=> Time

Options Hash (options):

  • :function_name (required, String)

    The name of the Lambda function.

  • :role (String)

    The Amazon Resource Name (ARN) of the IAM role that Lambda will assume when it executes your function.

  • :handler (String)

    The function that Lambda calls to begin executing your function. For Node.js, it is the module-name.export value in your function.

  • :description (String)

    A short user-defined function description. Lambda does not use this value. Assign a meaningful description as you see fit.

  • :timeout (Integer)

    The function execution time at which Lambda should terminate the function. Because the execution time has cost implications, we recommend you set this value based on your expected execution time. The default is 3 seconds.

  • :memory_size (Integer)

    The amount of memory, in MB, your Lambda function is given. Lambda uses this memory size to infer the amount of CPU allocated to your function. Your function use-case determines your CPU and memory requirements. For example, a database operation might need less memory compared to an image processing function. The default value is 128 MB. The value must be a multiple of 64 MB.

Returns:

See Also:

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

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.

Examples:

Request syntax with placeholder values


resp = client.upload_function({
  function_name: "FunctionName", # required
  function_zip: source_file, # file/IO object, or string data, required
  runtime: "nodejs", # required, accepts nodejs
  role: "RoleArn", # required
  handler: "Handler", # required
  mode: "event", # required, accepts event
  description: "Description",
  timeout: 1,
  memory_size: 1,
})

Response structure


resp.function_name #=> String
resp.function_arn #=> String
resp.configuration_id #=> String
resp.runtime #=> String, one of "nodejs"
resp.role #=> String
resp.handler #=> String
resp.mode #=> String, one of "event"
resp.code_size #=> Integer
resp.description #=> String
resp.timeout #=> Integer
resp.memory_size #=> Integer
resp.last_modified #=> Time

Options Hash (options):

  • :function_name (required, String)

    The name you want to assign to the function you are uploading. The function names appear in the console and are returned in the ListFunctions API. Function names are used to specify functions to other AWS Lambda APIs, such as InvokeAsync.

  • :function_zip (required, IO, String)

    A .zip file containing your packaged source code. For more information about creating a .zip file, go to AWS LambdaL How it Works in the AWS Lambda Developer Guide.

  • :runtime (required, String)

    The runtime environment for the Lambda function you are uploading. Currently, Lambda supports only \"nodejs\" as the runtime.

  • :role (required, 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.

  • :handler (required, String)

    The function that Lambda calls to begin execution. For Node.js, it is the module-name.export value in your function.

  • :mode (required, String)

    How the Lambda function will be invoked. Lambda supports only the \"event\" mode.

  • :description (String)

    A short, user-defined function description. Lambda does not use this value. Assign a meaningful description as you see fit.

  • :timeout (Integer)

    The function execution time at which Lambda should terminate the function. Because the execution time has cost implications, we recommend you set this value based on your expected execution time. The default is 3 seconds.

  • :memory_size (Integer)

    The amount of memory, in MB, your Lambda function is given. Lambda uses this memory size to infer the amount of CPU allocated to your function. Your function use-case determines your CPU and memory requirements. For example, database operation might need less memory compared to image processing function. The default value is 128 MB. The value must be a multiple of 64 MB.

Returns:

See Also:

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

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

Basic Usage

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)

Configuration

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

Callbacks

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

Handling Errors

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

Parameters:

  • waiter_name (Symbol)

    The name of the waiter. See #waiter_names for a full list of supported waiters.

  • params (Hash) (defaults to: {})

    Additional request parameters. See the #waiter_names for a list of supported waiters and what request they call. The called request determines the list of accepted parameters.

Yield Parameters:

Returns:

  • (Boolean)

    Returns true if the waiter was successful.

Raises:

  • (Errors::FailureStateError)

    Raised when the waiter terminates because the waiter has entered a state that it will not transition out of, preventing success.

  • (Errors::TooManyAttemptsError)

    Raised when the configured maximum number of attempts have been made, and the waiter is not yet successful.

  • (Errors::UnexpectedError)

    Raised when an error is encounted while polling for a resource that is not expected.

  • (Errors::NoSuchWaiterError)

    Raised when you request to wait for an unknown state.

#waiter_namesArray<Symbol>

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

Waiter NameClient MethodDefault Delay:Default Max Attempts:

Returns:

  • (Array<Symbol>)

    the list of supported waiters.