You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.
Class: Aws::QLDBSession::Client
- Inherits:
-
Seahorse::Client::Base
- Object
- Seahorse::Client::Base
- Aws::QLDBSession::Client
- Defined in:
- (unknown)
Overview
An API client for Amazon QLDB Session. To construct a client, you need to configure a :region and :credentials.
qldbsession = Aws::QLDBSession::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']andENV['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::QLDBSession::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
Constructor collapse
-
#initialize(options = {}) ⇒ Aws::QLDBSession::Client
constructor
Constructs an API client.
API Operations collapse
-
#send_command(options = {}) ⇒ Types::SendCommandResult
Sends a command to an Amazon QLDB ledger.
Instead of interacting directly with this API, we recommend that you use the Amazon QLDB Driver or the QLDB Shell to execute data transactions on a ledger.
-
If you are working with an AWS SDK, use the QLDB Driver.
-
Instance Method Summary collapse
-
#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.
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::QLDBSession::Client
Constructs an API client.
Instance Method Details
#send_command(options = {}) ⇒ Types::SendCommandResult
Sends a command to an Amazon QLDB ledger.
Instead of interacting directly with this API, we recommend that you use the Amazon QLDB Driver or the QLDB Shell to execute data transactions on a ledger. If you are working with an AWS SDK, use the QLDB Driver. The driver provides a high-level abstraction layer above this If you are working with the AWS Command Line Interface (AWS CLI), use the QLDB Shell. The shell is a command line interface that uses the QLDB Driver to interact with a ledger. For information, see Accessing Amazon QLDB using the QLDB Shell.
qldbsession data plane and manages SendCommand API calls for you. For information and a list of supported programming languages, see Getting started with the driver in the Amazon QLDB Developer Guide.
#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
#waiter_names ⇒ Array<Symbol>
Returns the list of supported waiters. The following table lists the supported waiters and the client method they call:
| Waiter Name | Client Method | Default Delay: | Default Max Attempts: |
|---|