Class: Aws::CloudWatch::Metric

#initialize(namespace, name, options = {}) ⇒ Metric
Parameters:
- namespace (String)
- name (String)
Options Hash (options):
- :client (Client)
#initialize(options = {}) ⇒ Metric
Options Hash (options):
- :namespace (required, String)
- :name (required, String)
- :client (Client)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 24

def initialize(*args)
  options = Hash === args.last ? args.pop.dup : {}
  @namespace = extract_namespace(args, options)
  @name = extract_name(args, options)
  @data = options.delete(:data)
  @client = options.delete(:client) || Client.new(options)
  @waiter_block_warned = false
end

Instance Method Details

#alarms(options = {}) ⇒ `Alarm::Collection`

Examples:

Request syntax with placeholder values


alarms = metric.alarms({
  statistic: "SampleCount", # accepts SampleCount, Average, Sum, Minimum, Maximum
  extended_statistic: "ExtendedStatistic",
  dimensions: [
    {
      name: "DimensionName", # required
      value: "DimensionValue", # required
    },
  ],
  period: 1,
  unit: "Seconds", # accepts Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, None
})

Parameters:

options (Hash) (defaults to: {}) —
({})

Options Hash (options):

:statistic (String) —
The statistic for the metric, other than percentiles. For percentile statistics, use ExtendedStatistics.
:extended_statistic (String) —
The percentile statistic for the metric. Specify a value between p0.0 and p100.
:dimensions (Array<Types::Dimension>) —
The dimensions associated with the metric. If the metric has any associated dimensions, you must specify them in order for the call to succeed.
:period (Integer) —
The period, in seconds, over which the statistic is applied.
:unit (String) —
The unit for the metric.

Returns:

(Alarm::Collection)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 692

def alarms(options = {})
  batches = Enumerator.new do |y|
    batch = []
    options = options.merge(
      namespace: @namespace,
      metric_name: @name
    )
    resp = @client.describe_alarms_for_metric(options)
    resp.data.metric_alarms.each do |m|
      batch << Alarm.new(
        name: m.alarm_name,
        data: m,
        client: @client
      )
    end
    y.yield(batch)
  end
  Alarm::Collection.new(batches)
end

#client ⇒ `Client`

Returns:

(Client)



55
56
57

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 55

def client
  @client
end

#data ⇒ `Types::Metric`

Returns the data for this Aws::CloudWatch::Metric. Calls Client#list_metrics if #data_loaded? is false.

Returns:

(Types::Metric) —
Returns the data for this Aws::CloudWatch::Metric. Calls Client#list_metrics if #data_loaded? is false.

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 78

def data
  load unless @data
  @data
end

#data_loaded? ⇒ `Boolean`

Returns true if this resource is loaded. Accessing attributes or #data on an unloaded resource will trigger a call to #load.

Returns:

(Boolean) —
Returns true if this resource is loaded. Accessing attributes or #data on an unloaded resource will trigger a call to #load.



86
87
88

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 86

def data_loaded?
  !!@data
end

#dimensions ⇒ `Array<Types::Dimension>`

The dimensions for the metric.

Returns:

(Array<Types::Dimension>)



48
49
50

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 48

def dimensions
  data[:dimensions]
end

#get_statistics(options = {}) ⇒ `Types::GetMetricStatisticsOutput`

Examples:

Request syntax with placeholder values


metric.get_statistics({
  dimensions: [
    {
      name: "DimensionName", # required
      value: "DimensionValue", # required
    },
  ],
  start_time: Time.now, # required
  end_time: Time.now, # required
  period: 1, # required
  statistics: ["SampleCount"], # accepts SampleCount, Average, Sum, Minimum, Maximum
  extended_statistics: ["ExtendedStatistic"],
  unit: "Seconds", # accepts Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, None
})

Parameters:

options (Hash) (defaults to: {}) —
({})

Options Hash (options):

:dimensions (Array<Types::Dimension>) —
The dimensions. If the metric contains multiple dimensions, you must include a value for each dimension. CloudWatch treats each unique combination of dimensions as a separate metric. If a specific combination of dimensions was not published, you can't retrieve statistics for it. You must specify the same dimensions that were used when the metrics were created. For an example, see Dimension Combinations in the Amazon CloudWatch User Guide. For more information about specifying dimensions, see Publishing Metrics in the Amazon CloudWatch User Guide.
:start_time (required, Time, DateTime, Date, Integer, String) —
The time stamp that determines the first data point to return. Start times are evaluated relative to the time that CloudWatch receives the request.

The value specified is inclusive; results include data points with the specified time stamp. In a raw HTTP query, the time stamp must be in ISO 8601 UTC format (for example, 2016-10-03T23:00:00Z).

CloudWatch rounds the specified time stamp as follows:
- Start time less than 15 days ago - Round down to the nearest whole minute. For example, 12:32:34 is rounded down to 12:32:00.
- Start time between 15 and 63 days ago - Round down to the nearest 5-minute clock interval. For example, 12:32:34 is rounded down to 12:30:00.
- Start time greater than 63 days ago - Round down to the nearest 1-hour clock interval. For example, 12:32:34 is rounded down to 12:00:00.
If you set Period to 5, 10, or 30, the start time of your request is rounded down to the nearest time that corresponds to even 5-, 10-, or 30-second divisions of a minute. For example, if you make a query at (HH:mm:ss) 01:05:23 for the previous 10-second period, the start time of your request is rounded down and you receive data from 01:05:10 to 01:05:20. If you make a query at 15:07:17 for the previous 5 minutes of data, using a period of 5 seconds, you receive data timestamped between 15:02:15 and 15:07:15.
:end_time (required, Time, DateTime, Date, Integer, String) —
The time stamp that determines the last data point to return.

The value specified is exclusive; results include data points up to the specified time stamp. In a raw HTTP query, the time stamp must be in ISO 8601 UTC format (for example, 2016-10-10T23:00:00Z).
:period (required, Integer) —
The granularity, in seconds, of the returned data points. For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData call that includes a StorageResolution of 1 second.

If the StartTime parameter specifies a time stamp that is greater than 3 hours ago, you must specify the period as follows or no data points in that time range is returned:
- Start time between 3 hours and 15 days ago - Use a multiple of 60 seconds (1 minute).
- Start time between 15 and 63 days ago - Use a multiple of 300 seconds (5 minutes).
- Start time greater than 63 days ago - Use a multiple of 3600 seconds (1 hour).
:statistics (Array<String>) —
The metric statistics, other than percentile. For percentile statistics, use ExtendedStatistics. When calling GetMetricStatistics, you must specify either Statistics or ExtendedStatistics, but not both.
:extended_statistics (Array<String>) —
The percentile statistics. Specify values between p0.0 and p100. When calling GetMetricStatistics, you must specify either Statistics or ExtendedStatistics, but not both. Percentile statistics are not available for metrics when any of the metric values are negative numbers.
:unit (String) —
The unit for a given metric. If you omit Unit, all data that was collected with any unit is returned, along with the corresponding units that were specified when the data was reported to CloudWatch. If you specify a unit, the operation returns only data that was collected with that unit specified. If you specify a unit that does not match the data collected, the results of the operation are null. CloudWatch does not perform unit conversions.

Returns:

(Types::GetMetricStatisticsOutput)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 298

def get_statistics(options = {})
  options = options.merge(
    namespace: @namespace,
    metric_name: @name
  )
  resp = @client.get_metric_statistics(options)
  resp.data
end

#load ⇒ `self` Also known as: reload

Loads, or reloads #data for the current Aws::CloudWatch::Metric. Returns self making it possible to chain methods.

metric.reload.data

Returns:

(self)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 65

def load
  resp = @client.list_metrics(
    metric_name: @name,
    namespace: @namespace
  )
  @data = resp.metrics[0]
  self
end

#name ⇒ `String` Also known as: metric_name

Returns:

(String)



41
42
43

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 41

def name
  @name
end

#namespace ⇒ `String`

Returns:

(String)



36
37
38

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 36

def namespace
  @namespace
end

#put_alarm(options = {}) ⇒ `Alarm`

Examples:

Request syntax with placeholder values


alarm = metric.put_alarm({
  alarm_name: "AlarmName", # required
  alarm_description: "AlarmDescription",
  actions_enabled: false,
  ok_actions: ["ResourceName"],
  alarm_actions: ["ResourceName"],
  insufficient_data_actions: ["ResourceName"],
  statistic: "SampleCount", # accepts SampleCount, Average, Sum, Minimum, Maximum
  extended_statistic: "ExtendedStatistic",
  dimensions: [
    {
      name: "DimensionName", # required
      value: "DimensionValue", # required
    },
  ],
  period: 1,
  unit: "Seconds", # accepts Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, None
  evaluation_periods: 1, # required
  datapoints_to_alarm: 1,
  threshold: 1.0,
  comparison_operator: "GreaterThanOrEqualToThreshold", # required, accepts GreaterThanOrEqualToThreshold, GreaterThanThreshold, LessThanThreshold, LessThanOrEqualToThreshold, LessThanLowerOrGreaterThanUpperThreshold, LessThanLowerThreshold, GreaterThanUpperThreshold
  treat_missing_data: "TreatMissingData",
  evaluate_low_sample_count_percentile: "EvaluateLowSampleCountPercentile",
  metrics: [
    {
      id: "MetricId", # required
      metric_stat: {
        metric: { # required
          namespace: "Namespace",
          metric_name: "MetricName",
          dimensions: [
            {
              name: "DimensionName", # required
              value: "DimensionValue", # required
            },
          ],
        },
        period: 1, # required
        stat: "Stat", # required
        unit: "Seconds", # accepts Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, None
      },
      expression: "MetricExpression",
      label: "MetricLabel",
      return_data: false,
      period: 1,
      account_id: "AccountId",
    },
  ],
  tags: [
    {
      key: "TagKey", # required
      value: "TagValue", # required
    },
  ],
  threshold_metric_id: "MetricId",
})

Parameters:

options (Hash) (defaults to: {}) —
({})

Options Hash (options):

:alarm_name (required, String) —
The name for the alarm. This name must be unique within the Region.
:alarm_description (String) —
The description for the alarm.
:actions_enabled (Boolean) —
Indicates whether actions should be executed during any changes to the alarm state. The default is TRUE.
:ok_actions (Array<String>) —
The actions to execute when this alarm transitions to an OK state from any other state. Each action is specified as an Amazon Resource Name (ARN).

Valid Values: arn:aws:automate:region:ec2:stop | arn:aws:automate:region:ec2:terminate | arn:aws:automate:region:ec2:recover | arn:aws:automate:region:ec2:reboot | arn:aws:sns:region:account-id:sns-topic-name | arn:aws:autoscaling:region:account-id:scalingPolicy:policy-id:autoScalingGroupName/group-friendly-name:policyName/policy-friendly-name

Valid Values (for use with IAM roles): arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Reboot/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Recover/1.0
:alarm_actions (Array<String>) —
The actions to execute when this alarm transitions to the ALARM state from any other state. Each action is specified as an Amazon Resource Name (ARN).

Valid Values: arn:aws:automate:region:ec2:stop | arn:aws:automate:region:ec2:terminate | arn:aws:automate:region:ec2:recover | arn:aws:automate:region:ec2:reboot | arn:aws:sns:region:account-id:sns-topic-name | arn:aws:autoscaling:region:account-id:scalingPolicy:policy-id:autoScalingGroupName/group-friendly-name:policyName/policy-friendly-name | arn:aws:ssm:region:account-id:opsitem:severity | arn:aws:ssm-incidents::account-id:response-plan:response-plan-name

Valid Values (for use with IAM roles): arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Reboot/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Recover/1.0
:insufficient_data_actions (Array<String>) —
The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state. Each action is specified as an Amazon Resource Name (ARN).

Valid Values: arn:aws:automate:region:ec2:stop | arn:aws:automate:region:ec2:terminate | arn:aws:automate:region:ec2:recover | arn:aws:automate:region:ec2:reboot | arn:aws:sns:region:account-id:sns-topic-name | arn:aws:autoscaling:region:account-id:scalingPolicy:policy-id:autoScalingGroupName/group-friendly-name:policyName/policy-friendly-name

Valid Values (for use with IAM roles): >arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:region:account-id:action/actions/AWS_EC2.InstanceId.Reboot/1.0
:statistic (String) —
The statistic for the metric specified in MetricName, other than percentile. For percentile statistics, use ExtendedStatistic. When you call PutMetricAlarm and specify a MetricName, you must specify either Statistic or ExtendedStatistic, but not both.
:extended_statistic (String) —
The percentile statistic for the metric specified in MetricName. Specify a value between p0.0 and p100. When you call PutMetricAlarm and specify a MetricName, you must specify either Statistic or ExtendedStatistic, but not both.
:dimensions (Array<Types::Dimension>) —
The dimensions for the metric specified in MetricName.
:period (Integer) —
The length, in seconds, used each time the metric specified in MetricName is evaluated. Valid values are 10, 30, and any multiple of 60.

Period is required for alarms based on static thresholds. If you are creating an alarm based on a metric math expression, you specify the period for each metric within the objects in the Metrics array.

Be sure to specify 10 or 30 only for metrics that are stored by a PutMetricData call with a StorageResolution of 1. If you specify a period of 10 or 30 for a metric that does not have sub-minute resolution, the alarm still attempts to gather data at the period rate that you specify. In this case, it does not receive data for the attempts that do not correspond to a one-minute data resolution, and the alarm might often lapse into INSUFFICENT_DATA status. Specifying 10 or 30 also sets this alarm as a high-resolution alarm, which has a higher charge than other alarms. For more information about pricing, see Amazon CloudWatch Pricing.

An alarm's total current evaluation period can be no longer than one day, so Period multiplied by EvaluationPeriods cannot be more than 86,400 seconds.
:unit (String) —
The unit of measure for the statistic. For example, the units for the Amazon EC2 NetworkIn metric are Bytes because NetworkIn tracks the number of bytes that an instance receives on all network interfaces. You can also specify a unit when you create a custom metric. Units help provide conceptual meaning to your data. Metric data points that specify a unit of measure, such as Percent, are aggregated separately.

If you don't specify Unit, CloudWatch retrieves all unit types that have been published for the metric and attempts to evaluate the alarm. Usually, metrics are published with only one unit, so the alarm works as intended.

However, if the metric is published with multiple types of units and you don't specify a unit, the alarm's behavior is not defined and it behaves predictably.

We recommend omitting Unit so that you don't inadvertently specify an incorrect unit that is not published for this metric. Doing so causes the alarm to be stuck in the INSUFFICIENT DATA state.
:evaluation_periods (required, Integer) —
The number of periods over which data is compared to the specified threshold. If you are setting an alarm that requires that a number of consecutive data points be breaching to trigger the alarm, this value specifies that number. If you are setting an "M out of N" alarm, this value is the N.

An alarm's total current evaluation period can be no longer than one day, so this number multiplied by Period cannot be more than 86,400 seconds.
:datapoints_to_alarm (Integer) —
The number of data points that must be breaching to trigger the alarm. This is used only if you are setting an "M out of N" alarm. In that case, this value is the M. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide.
:threshold (Float) —
The value against which the specified statistic is compared.

This parameter is required for alarms based on static thresholds, but should not be used for alarms based on anomaly detection models.
:comparison_operator (required, String) —
The arithmetic operation to use when comparing the specified statistic and threshold. The specified statistic value is used as the first operand.

The values LessThanLowerOrGreaterThanUpperThreshold, LessThanLowerThreshold, and GreaterThanUpperThreshold are used only for alarms based on anomaly detection models.
:treat_missing_data (String) —
Sets how this alarm is to handle missing data points. If TreatMissingData is omitted, the default behavior of missing is used. For more information, see Configuring How CloudWatch Alarms Treats Missing Data.

Valid Values: breaching | notBreaching | ignore | missing

Alarms that evaluate metrics in the AWS/DynamoDB namespace always ignore missing data even if you choose a different option for TreatMissingData. When an AWS/DynamoDB metric has missing data, alarms that evaluate that metric remain in their current state.
:evaluate_low_sample_count_percentile (String) —
Used only for alarms based on percentiles. If you specify ignore, the alarm state does not change during periods with too few data points to be statistically significant. If you specify evaluate or omit this parameter, the alarm is always evaluated and possibly changes state no matter how many data points are available. For more information, see Percentile-Based CloudWatch Alarms and Low Data Samples.

Valid Values: evaluate | ignore
:metrics (Array<Types::MetricDataQuery>) —
An array of MetricDataQuery structures that enable you to create an alarm based on the result of a metric math expression. For each PutMetricAlarm operation, you must specify either MetricName or a Metrics array.

Each item in the Metrics array either retrieves a metric or performs a math expression.

One item in the Metrics array is the expression that the alarm watches. You designate this expression by setting ReturnData to true for this object in the array. For more information, see MetricDataQuery.

If you use the Metrics parameter, you cannot include the MetricName, Dimensions, Period, Namespace, Statistic, or ExtendedStatistic parameters of PutMetricAlarm in the same operation. Instead, you retrieve the metrics you are using in your math expression as part of the Metrics array.
:tags (Array<Types::Tag>) —
A list of key-value pairs to associate with the alarm. You can associate as many as 50 tags with an alarm.

Tags can help you organize and categorize your resources. You can also use them to scope user permissions by granting a user permission to access or change only resources with certain tag values.

If you are using this operation to update an existing alarm, any tags you specify in this parameter are ignored. To change the tags of an existing alarm, use TagResource or UntagResource.
:threshold_metric_id (String) —
If this is an alarm based on an anomaly detection model, make this value match the ID of the ANOMALY_DETECTION_BAND function.

For an example of how to use this parameter, see the Anomaly Detection Model Alarm example on this page.

If your alarm uses this parameter, it cannot have Auto Scaling actions.

Returns:

(Alarm)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 607

def put_alarm(options = {})
  options = options.merge(
    namespace: @namespace,
    metric_name: @name
  )
  @client.put_metric_alarm(options)
  Alarm.new(
    name: options[:alarm_name],
    client: @client
  )
end

#put_data(options = {}) ⇒ `EmptyStructure`

Examples:

Request syntax with placeholder values


metric.put_data({
  metric_data: [ # required
    {
      metric_name: "MetricName", # required
      dimensions: [
        {
          name: "DimensionName", # required
          value: "DimensionValue", # required
        },
      ],
      timestamp: Time.now,
      value: 1.0,
      statistic_values: {
        sample_count: 1.0, # required
        sum: 1.0, # required
        minimum: 1.0, # required
        maximum: 1.0, # required
      },
      values: [1.0],
      counts: [1.0],
      unit: "Seconds", # accepts Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, None
      storage_resolution: 1,
    },
  ],
})

Parameters:

options (Hash) (defaults to: {}) —
({})

Options Hash (options):

:metric_data (required, Array<Types::MetricDatum>) —
The data for the metric. The array can include no more than 20 metrics per call.

Returns:

(EmptyStructure)

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 651

def put_data(options = {})
  options = Aws::Util.deep_merge(options,
    namespace: @namespace,
    metric_data: [{ metric_name: @name }]
  )
  resp = @client.put_metric_data(options)
  resp.data
end

#wait_until(options = {}) {|resource| ... } ⇒ `Resource`

Deprecated.

Use [Aws::CloudWatch::Client] #wait_until instead

Note:

The waiting operation is performed on a copy. The original resource remains unchanged.

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

Basic Usage

Waiter will polls until it is successful, it fails by entering a terminal state, or until a maximum number of attempts are made.

# polls in a loop until condition is true
resource.wait_until(options) {|resource| condition}

Example

instance.wait_until(max_attempts:10, delay:5) do |instance|
  instance.state.name == 'running'
end

Configuration

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

# poll for ~25 seconds
resource.wait_until(max_attempts:5,delay:5) {|resource|...}

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

  # disable max attempts
instance.wait_until(before_wait:proc, max_attempts:nil) {...}

Handling Errors

When a waiter is successful, it returns the Resource. When a waiter fails, it raises an error.

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

attempts attempt in seconds invoked before each attempt invoked before each wait

Parameters:

options (Hash) (defaults to: {}) —
a customizable set of options

Options Hash (options):

:max_attempts (Integer) — default: 10 —
Maximum number of
:delay (Integer) — default: 10 —
Delay between each
:before_attempt (Proc) — default: nil —
Callback
:before_wait (Proc) — default: nil —
Callback

Yield Parameters:

resource (Resource) —
to be used in the waiting condition.

Returns:

(Resource) —
if the waiter was successful

Raises:

(Aws::Waiters::Errors::FailureStateError) —
Raised when the waiter terminates because the waiter has entered a state that it will not transition out of, preventing success.

yet successful.
(Aws::Waiters::Errors::UnexpectedError) —
Raised when an error is encountered while polling for a resource that is not expected.
(NotImplementedError) —
Raised when the resource does not

# File 'gems/aws-sdk-cloudwatch/lib/aws-sdk-cloudwatch/metric.rb', line 170

def wait_until(options = {}, &block)
  self_copy = self.dup
  attempts = 0
  options[:max_attempts] = 10 unless options.key?(:max_attempts)
  options[:delay] ||= 10
  options[:poller] = Proc.new do
    attempts += 1
    if block.call(self_copy)
      [:success, self_copy]
    else
      self_copy.reload unless attempts == options[:max_attempts]
      :retry
    end
  end
  Aws::Waiters::Waiter.new(options).wait({})
end

Class: Aws::CloudWatch::Metric

Defined Under Namespace

Read-Only Attributes collapse

Actions collapse

Associations collapse

Instance Method Summary collapse

Constructor Details

#initialize(namespace, name, options = {}) ⇒ Metric #initialize(options = {}) ⇒ Metric

Instance Method Details

#alarms(options = {}) ⇒ Alarm::Collection

#client ⇒ Client

#data ⇒ Types::Metric

#data_loaded? ⇒ Boolean

#dimensions ⇒ Array<Types::Dimension>

#get_statistics(options = {}) ⇒ Types::GetMetricStatisticsOutput

#load ⇒ self Also known as: reload

#name ⇒ String Also known as: metric_name

#namespace ⇒ String

#put_alarm(options = {}) ⇒ Alarm

#put_data(options = {}) ⇒ EmptyStructure

#wait_until(options = {}) {|resource| ... } ⇒ Resource

Basic Usage

Example

Configuration

Callbacks

Handling Errors

#initialize(namespace, name, options = {}) ⇒ `Metric` #initialize(options = {}) ⇒ `Metric`

#alarms(options = {}) ⇒ `Alarm::Collection`

#client ⇒ `Client`

#data ⇒ `Types::Metric`

#data_loaded? ⇒ `Boolean`

#dimensions ⇒ `Array<Types::Dimension>`

#get_statistics(options = {}) ⇒ `Types::GetMetricStatisticsOutput`

#load ⇒ `self` Also known as: reload

#name ⇒ `String` Also known as: metric_name

#namespace ⇒ `String`

#put_alarm(options = {}) ⇒ `Alarm`

#put_data(options = {}) ⇒ `EmptyStructure`

#wait_until(options = {}) {|resource| ... } ⇒ `Resource`