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Class: Aws::CloudWatchEvents::Client

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

Overview

An API client for Amazon CloudWatch Events. To construct a client, you need to configure a :region and :credentials.

cloudwatchevents = Aws::CloudWatchEvents::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::CloudWatchEvents::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::CloudWatchEvents::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.

  • :simple_json (Boolean) — default: false

    Disables request parameter conversion, validation, and formatting. Also disable response data type conversions. This option is useful when you want to ensure the highest level of performance by avoiding overhead of walking request parameters and response data structures.

    When :simple_json is enabled, the request parameters hash must be formatted exactly as the DynamoDB API expects. See Plugins::Protocols::JsonRpc 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 Aws::ClientStubs#stub_responses. See Aws::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

#delete_rule(options = {}) ⇒ Struct

Deletes the specified rule.

You must remove all targets from a rule using RemoveTargets before you can delete the rule.

When you delete a rule, incoming events might continue to match to the deleted rule. Please allow a short period of time for changes to take effect.

Examples:

Request syntax with placeholder values


resp = client.delete_rule({
  name: "RuleName", # required
})

Options Hash (options):

  • :name (required, String)

    The name of the rule.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#describe_event_bus(options = {}) ⇒ Types::DescribeEventBusResponse

Displays the external AWS accounts that are permitted to write events to your account using your account's event bus, and the associated policy. To enable your account to receive events from other accounts, use PutPermission.

Examples:

Request syntax with placeholder values


resp = client.describe_event_bus()

Response structure


resp.name #=> String
resp.arn #=> String
resp.policy #=> String

Returns:

See Also:

#describe_rule(options = {}) ⇒ Types::DescribeRuleResponse

Describes the specified rule.

Examples:

Request syntax with placeholder values


resp = client.describe_rule({
  name: "RuleName", # required
})

Response structure


resp.name #=> String
resp.arn #=> String
resp.event_pattern #=> String
resp.schedule_expression #=> String
resp.state #=> String, one of "ENABLED", "DISABLED"
resp.description #=> String
resp.role_arn #=> String

Options Hash (options):

  • :name (required, String)

    The name of the rule.

Returns:

See Also:

#disable_rule(options = {}) ⇒ Struct

Disables the specified rule. A disabled rule won't match any events, and won't self-trigger if it has a schedule expression.

When you disable a rule, incoming events might continue to match to the disabled rule. Please allow a short period of time for changes to take effect.

Examples:

Request syntax with placeholder values


resp = client.disable_rule({
  name: "RuleName", # required
})

Options Hash (options):

  • :name (required, String)

    The name of the rule.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#enable_rule(options = {}) ⇒ Struct

Enables the specified rule. If the rule does not exist, the operation fails.

When you enable a rule, incoming events might not immediately start matching to a newly enabled rule. Please allow a short period of time for changes to take effect.

Examples:

Request syntax with placeholder values


resp = client.enable_rule({
  name: "RuleName", # required
})

Options Hash (options):

  • :name (required, String)

    The name of the rule.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#list_rule_names_by_target(options = {}) ⇒ Types::ListRuleNamesByTargetResponse

Lists the rules for the specified target. You can see which of the rules in Amazon CloudWatch Events can invoke a specific target in your account.

Examples:

Request syntax with placeholder values


resp = client.list_rule_names_by_target({
  target_arn: "TargetArn", # required
  next_token: "NextToken",
  limit: 1,
})

Response structure


resp.rule_names #=> Array
resp.rule_names[0] #=> String
resp.next_token #=> String

Options Hash (options):

  • :target_arn (required, String)

    The Amazon Resource Name (ARN) of the target resource.

  • :next_token (String)

    The token returned by a previous call to retrieve the next set of results.

  • :limit (Integer)

    The maximum number of results to return.

Returns:

See Also:

#list_rules(options = {}) ⇒ Types::ListRulesResponse

Lists your Amazon CloudWatch Events rules. You can either list all the rules or you can provide a prefix to match to the rule names.

Examples:

Request syntax with placeholder values


resp = client.list_rules({
  name_prefix: "RuleName",
  next_token: "NextToken",
  limit: 1,
})

Response structure


resp.rules #=> Array
resp.rules[0].name #=> String
resp.rules[0].arn #=> String
resp.rules[0].event_pattern #=> String
resp.rules[0].state #=> String, one of "ENABLED", "DISABLED"
resp.rules[0].description #=> String
resp.rules[0].schedule_expression #=> String
resp.rules[0].role_arn #=> String
resp.next_token #=> String

Options Hash (options):

  • :name_prefix (String)

    The prefix matching the rule name.

  • :next_token (String)

    The token returned by a previous call to retrieve the next set of results.

  • :limit (Integer)

    The maximum number of results to return.

Returns:

See Also:

#list_targets_by_rule(options = {}) ⇒ Types::ListTargetsByRuleResponse

Lists the targets assigned to the specified rule.

Examples:

Request syntax with placeholder values


resp = client.list_targets_by_rule({
  rule: "RuleName", # required
  next_token: "NextToken",
  limit: 1,
})

Response structure


resp.targets #=> Array
resp.targets[0].id #=> String
resp.targets[0].arn #=> String
resp.targets[0].role_arn #=> String
resp.targets[0].input #=> String
resp.targets[0].input_path #=> String
resp.targets[0].input_transformer.input_paths_map #=> Hash
resp.targets[0].input_transformer.input_paths_map["InputTransformerPathKey"] #=> String
resp.targets[0].input_transformer.input_template #=> String
resp.targets[0].kinesis_parameters.partition_key_path #=> String
resp.targets[0].run_command_parameters.run_command_targets #=> Array
resp.targets[0].run_command_parameters.run_command_targets[0].key #=> String
resp.targets[0].run_command_parameters.run_command_targets[0].values #=> Array
resp.targets[0].run_command_parameters.run_command_targets[0].values[0] #=> String
resp.targets[0].ecs_parameters.task_definition_arn #=> String
resp.targets[0].ecs_parameters.task_count #=> Integer
resp.next_token #=> String

Options Hash (options):

  • :rule (required, String)

    The name of the rule.

  • :next_token (String)

    The token returned by a previous call to retrieve the next set of results.

  • :limit (Integer)

    The maximum number of results to return.

Returns:

See Also:

#put_events(options = {}) ⇒ Types::PutEventsResponse

Sends custom events to Amazon CloudWatch Events so that they can be matched to rules.

Examples:

Request syntax with placeholder values


resp = client.put_events({
  entries: [ # required
    {
      time: Time.now,
      source: "String",
      resources: ["EventResource"],
      detail_type: "String",
      detail: "String",
    },
  ],
})

Response structure


resp.failed_entry_count #=> Integer
resp.entries #=> Array
resp.entries[0].event_id #=> String
resp.entries[0].error_code #=> String
resp.entries[0].error_message #=> String

Options Hash (options):

  • :entries (required, Array<Types::PutEventsRequestEntry>)

    The entry that defines an event in your system. You can specify several parameters for the entry such as the source and type of the event, resources associated with the event, and so on.

Returns:

See Also:

#put_permission(options = {}) ⇒ Struct

Running PutPermission permits the specified AWS account to put events to your account's default event bus. CloudWatch Events rules in your account are triggered by these events arriving to your default event bus.

For another account to send events to your account, that external account must have a CloudWatch Events rule with your account's default event bus as a target.

To enable multiple AWS accounts to put events to your default event bus, run PutPermission once for each of these accounts.

The permission policy on the default event bus cannot exceed 10KB in size.

Examples:

Request syntax with placeholder values


resp = client.put_permission({
  action: "Action", # required
  principal: "Principal", # required
  statement_id: "StatementId", # required
})

Options Hash (options):

  • :action (required, String)

    The action that you are enabling the other account to perform. Currently, this must be events:PutEvents.

  • :principal (required, String)

    The 12-digit AWS account ID that you are permitting to put events to your default event bus. Specify \"*\" to permit any account to put events to your default event bus.

    If you specify \"*\", avoid creating rules that may match undesirable events. To create more secure rules, make sure that the event pattern for each rule contains an account field with a specific account ID from which to receive events. Rules with an account field do not match any events sent from other accounts.

  • :statement_id (required, String)

    An identifier string for the external account that you are granting permissions to. If you later want to revoke the permission for this external account, specify this StatementId when you run RemovePermission.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#put_rule(options = {}) ⇒ Types::PutRuleResponse

Creates or updates the specified rule. Rules are enabled by default, or based on value of the state. You can disable a rule using DisableRule.

When you create or update a rule, incoming events might not immediately start matching to new or updated rules. Please allow a short period of time for changes to take effect.

A rule must contain at least an EventPattern or ScheduleExpression. Rules with EventPatterns are triggered when a matching event is observed. Rules with ScheduleExpressions self-trigger based on the given schedule. A rule can have both an EventPattern and a ScheduleExpression, in which case the rule triggers on matching events as well as on a schedule.

Most services in AWS treat : or / as the same character in Amazon Resource Names (ARNs). However, CloudWatch Events uses an exact match in event patterns and rules. Be sure to use the correct ARN characters when creating event patterns so that they match the ARN syntax in the event you want to match.

Examples:

Request syntax with placeholder values


resp = client.put_rule({
  name: "RuleName", # required
  schedule_expression: "ScheduleExpression",
  event_pattern: "EventPattern",
  state: "ENABLED", # accepts ENABLED, DISABLED
  description: "RuleDescription",
  role_arn: "RoleArn",
})

Response structure


resp.rule_arn #=> String

Options Hash (options):

  • :name (required, String)

    The name of the rule that you are creating or updating.

  • :schedule_expression (String)

    The scheduling expression. For example, \"cron(0 20 * * ? *)\" or \"rate(5 minutes)\".

  • :event_pattern (String)

    The event pattern. For more information, see Events and Event Patterns in the Amazon CloudWatch Events User Guide.

  • :state (String)

    Indicates whether the rule is enabled or disabled.

  • :description (String)

    A description of the rule.

  • :role_arn (String)

    The Amazon Resource Name (ARN) of the IAM role associated with the rule.

Returns:

See Also:

#put_targets(options = {}) ⇒ Types::PutTargetsResponse

Adds the specified targets to the specified rule, or updates the targets if they are already associated with the rule.

Targets are the resources that are invoked when a rule is triggered.

You can configure the following as targets for CloudWatch Events:

  • EC2 instances

  • AWS Lambda functions

  • Streams in Amazon Kinesis Streams

  • Delivery streams in Amazon Kinesis Firehose

  • Amazon ECS tasks

  • AWS Step Functions state machines

  • Pipelines in Amazon Code Pipeline

  • Amazon Inspector assessment templates

  • Amazon SNS topics

  • Amazon SQS queues

  • The default event bus of another AWS account

Note that creating rules with built-in targets is supported only in the AWS Management Console.

For some target types, PutTargets provides target-specific parameters. If the target is an Amazon Kinesis stream, you can optionally specify which shard the event goes to by using the KinesisParameters argument. To invoke a command on multiple EC2 instances with one rule, you can use the RunCommandParameters field.

To be able to make API calls against the resources that you own, Amazon CloudWatch Events needs the appropriate permissions. For AWS Lambda and Amazon SNS resources, CloudWatch Events relies on resource-based policies. For EC2 instances, Amazon Kinesis streams, and AWS Step Functions state machines, CloudWatch Events relies on IAM roles that you specify in the RoleARN argument in PutTargets. For more information, see Authentication and Access Control in the Amazon CloudWatch Events User Guide.

If another AWS account is in the same region and has granted you permission (using PutPermission), you can send events to that account by setting that account's event bus as a target of the rules in your account. To send the matched events to the other account, specify that account's event bus as the Arn when you run PutTargets. If your account sends events to another account, your account is charged for each sent event. Each event sent to antoher account is charged as a custom event. The account receiving the event is not charged. For more information on pricing, see Amazon CloudWatch Pricing.

For more information about enabling cross-account events, see PutPermission.

Input, InputPath and InputTransformer are mutually exclusive and optional parameters of a target. When a rule is triggered due to a matched event:

  • If none of the following arguments are specified for a target, then the entire event is passed to the target in JSON form (unless the target is Amazon EC2 Run Command or Amazon ECS task, in which case nothing from the event is passed to the target).

  • If Input is specified in the form of valid JSON, then the matched event is overridden with this constant.

  • If InputPath is specified in the form of JSONPath (for example, $.detail), then only the part of the event specified in the path is passed to the target (for example, only the detail part of the event is passed).

  • If InputTransformer is specified, then one or more specified JSONPaths are extracted from the event and used as values in a template that you specify as the input to the target.

When you specify Input, InputPath, or InputTransformer, you must use JSON dot notation, not bracket notation.

When you add targets to a rule and the associated rule triggers soon after, new or updated targets might not be immediately invoked. Please allow a short period of time for changes to take effect.

This action can partially fail if too many requests are made at the same time. If that happens, FailedEntryCount is non-zero in the response and each entry in FailedEntries provides the ID of the failed target and the error code.

Examples:

Request syntax with placeholder values


resp = client.put_targets({
  rule: "RuleName", # required
  targets: [ # required
    {
      id: "TargetId", # required
      arn: "TargetArn", # required
      role_arn: "RoleArn",
      input: "TargetInput",
      input_path: "TargetInputPath",
      input_transformer: {
        input_paths_map: {
          "InputTransformerPathKey" => "TargetInputPath",
        },
        input_template: "TransformerInput", # required
      },
      kinesis_parameters: {
        partition_key_path: "TargetPartitionKeyPath", # required
      },
      run_command_parameters: {
        run_command_targets: [ # required
          {
            key: "RunCommandTargetKey", # required
            values: ["RunCommandTargetValue"], # required
          },
        ],
      },
      ecs_parameters: {
        task_definition_arn: "Arn", # required
        task_count: 1,
      },
    },
  ],
})

Response structure


resp.failed_entry_count #=> Integer
resp.failed_entries #=> Array
resp.failed_entries[0].target_id #=> String
resp.failed_entries[0].error_code #=> String
resp.failed_entries[0].error_message #=> String

Options Hash (options):

  • :rule (required, String)

    The name of the rule.

  • :targets (required, Array<Types::Target>)

    The targets to update or add to the rule.

Returns:

See Also:

#remove_permission(options = {}) ⇒ Struct

Revokes the permission of another AWS account to be able to put events to your default event bus. Specify the account to revoke by the StatementId value that you associated with the account when you granted it permission with PutPermission. You can find the StatementId by using DescribeEventBus.

Examples:

Request syntax with placeholder values


resp = client.remove_permission({
  statement_id: "StatementId", # required
})

Options Hash (options):

  • :statement_id (required, String)

    The statement ID corresponding to the account that is no longer allowed to put events to the default event bus.

Returns:

  • (Struct)

    Returns an empty response.

See Also:

#remove_targets(options = {}) ⇒ Types::RemoveTargetsResponse

Removes the specified targets from the specified rule. When the rule is triggered, those targets are no longer be invoked.

When you remove a target, when the associated rule triggers, removed targets might continue to be invoked. Please allow a short period of time for changes to take effect.

This action can partially fail if too many requests are made at the same time. If that happens, FailedEntryCount is non-zero in the response and each entry in FailedEntries provides the ID of the failed target and the error code.

Examples:

Request syntax with placeholder values


resp = client.remove_targets({
  rule: "RuleName", # required
  ids: ["TargetId"], # required
})

Response structure


resp.failed_entry_count #=> Integer
resp.failed_entries #=> Array
resp.failed_entries[0].target_id #=> String
resp.failed_entries[0].error_code #=> String
resp.failed_entries[0].error_message #=> String

Options Hash (options):

  • :rule (required, String)

    The name of the rule.

  • :ids (required, Array<String>)

    The IDs of the targets to remove from the rule.

Returns:

See Also:

#test_event_pattern(options = {}) ⇒ Types::TestEventPatternResponse

Tests whether the specified event pattern matches the provided event.

Most services in AWS treat : or / as the same character in Amazon Resource Names (ARNs). However, CloudWatch Events uses an exact match in event patterns and rules. Be sure to use the correct ARN characters when creating event patterns so that they match the ARN syntax in the event you want to match.

Examples:

Request syntax with placeholder values


resp = client.test_event_pattern({
  event_pattern: "EventPattern", # required
  event: "String", # required
})

Response structure


resp.result #=> true/false

Options Hash (options):

  • :event_pattern (required, String)

    The event pattern. For more information, see Events and Event Patterns in the Amazon CloudWatch Events User Guide.

  • :event (required, String)

    The event, in JSON format, to test against the event pattern.

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.