Package software.amazon.awssdk.services.cloudwatch

Interface CloudWatchAsyncClient

All Superinterfaces:

AutoCloseable

@Generated("software.amazon.awssdk:codegen")
public interface CloudWatchAsyncClient
extends AutoCloseable

Service client for accessing CloudWatch asynchronously. This can be created using the static builder() method.

Amazon CloudWatch monitors your Amazon Web Services (AWS) resources and the applications you run on AWS in real-time. You can use CloudWatch to collect and track metrics, which are the variables you want to measure for your resources and applications.

CloudWatch alarms send notifications or automatically make changes to the resources you are monitoring based on rules that you define. For example, you can monitor the CPU usage and disk reads and writes of your Amazon Elastic Compute Cloud (Amazon EC2) instances and then use this data to determine whether you should launch additional instances to handle increased load. You can also use this data to stop under-used instances to save money.

In addition to monitoring the built-in metrics that come with AWS, you can monitor your own custom metrics. With CloudWatch, you gain system-wide visibility into resource utilization, application performance, and operational health.

Method Summary

Modifier and Type	Method	Description
static CloudWatchAsyncClientBuilder	builder()	Create a builder that can be used to configure and create a CloudWatchAsyncClient.
static CloudWatchAsyncClient	create()	Create a CloudWatchAsyncClient with the region loaded from the DefaultAwsRegionProviderChain and credentials loaded from the DefaultCredentialsProvider.
default CompletableFuture<DeleteAlarmsResponse>	deleteAlarms(DeleteAlarmsRequest deleteAlarmsRequest)	Deletes the specified alarms.
default CompletableFuture<DescribeAlarmHistoryResponse>	describeAlarmHistory(DescribeAlarmHistoryRequest describeAlarmHistoryRequest)	Retrieves the history for the specified alarm.
default CompletableFuture<DescribeAlarmsResponse>	describeAlarms(DescribeAlarmsRequest describeAlarmsRequest)	Retrieves the specified alarms.
default CompletableFuture<DescribeAlarmsForMetricResponse>	describeAlarmsForMetric(DescribeAlarmsForMetricRequest describeAlarmsForMetricRequest)	Retrieves the alarms for the specified metric.
default CompletableFuture<DisableAlarmActionsResponse>	disableAlarmActions(DisableAlarmActionsRequest disableAlarmActionsRequest)	Disables the actions for the specified alarms.
default CompletableFuture<EnableAlarmActionsResponse>	enableAlarmActions(EnableAlarmActionsRequest enableAlarmActionsRequest)	Enables the actions for the specified alarms.
default CompletableFuture<GetMetricStatisticsResponse>	getMetricStatistics(GetMetricStatisticsRequest getMetricStatisticsRequest)	Gets statistics for the specified metric.
default CompletableFuture<ListMetricsResponse>	listMetrics(ListMetricsRequest listMetricsRequest)	List the specified metrics.
default CompletableFuture<PutMetricAlarmResponse>	putMetricAlarm(PutMetricAlarmRequest putMetricAlarmRequest)	Creates or updates an alarm and associates it with the specified metric.
default CompletableFuture<PutMetricDataResponse>	putMetricData(PutMetricDataRequest putMetricDataRequest)	Publishes metric data points to Amazon CloudWatch.
default CompletableFuture<SetAlarmStateResponse>	setAlarmState(SetAlarmStateRequest setAlarmStateRequest)	Temporarily sets the state of an alarm for testing purposes.

Methods inherited from interface java.lang.AutoCloseable

close

Method Detail

create

static CloudWatchAsyncClient create()

Create a CloudWatchAsyncClient with the region loaded from the DefaultAwsRegionProviderChain and credentials loaded from the DefaultCredentialsProvider.

builder

static CloudWatchAsyncClientBuilder builder()

Create a builder that can be used to configure and create a CloudWatchAsyncClient.

deleteAlarms

default CompletableFuture<DeleteAlarmsResponse> deleteAlarms(DeleteAlarmsRequest deleteAlarmsRequest)

Deletes the specified alarms. In the event of an error, no alarms are deleted.

Parameters:

deleteAlarmsRequest -

Returns:

A Java Future containing the result of the DeleteAlarms operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• ResourceNotFoundException The named resource does not exist.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

describeAlarmHistory

default CompletableFuture<DescribeAlarmHistoryResponse> describeAlarmHistory(DescribeAlarmHistoryRequest describeAlarmHistoryRequest)

Retrieves the history for the specified alarm. You can filter the results by date range or item type. If an alarm name is not specified, the histories for all alarms are returned.

Note that Amazon CloudWatch retains the history of an alarm even if you delete the alarm.

Parameters:

describeAlarmHistoryRequest -

Returns:

A Java Future containing the result of the DescribeAlarmHistory operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• InvalidNextTokenException The next token specified is invalid.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

describeAlarms

default CompletableFuture<DescribeAlarmsResponse> describeAlarms(DescribeAlarmsRequest describeAlarmsRequest)

Retrieves the specified alarms. If no alarms are specified, all alarms are returned. Alarms can be retrieved by using only a prefix for the alarm name, the alarm state, or a prefix for any action.

Parameters:

describeAlarmsRequest -

Returns:

A Java Future containing the result of the DescribeAlarms operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• InvalidNextTokenException The next token specified is invalid.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

describeAlarmsForMetric

default CompletableFuture<DescribeAlarmsForMetricResponse> describeAlarmsForMetric(DescribeAlarmsForMetricRequest describeAlarmsForMetricRequest)

Retrieves the alarms for the specified metric. Specify a statistic, period, or unit to filter the results.

Parameters:

describeAlarmsForMetricRequest -

Returns:

A Java Future containing the result of the DescribeAlarmsForMetric operation returned by the service.

See Also:

AWS API Documentation

disableAlarmActions

default CompletableFuture<DisableAlarmActionsResponse> disableAlarmActions(DisableAlarmActionsRequest disableAlarmActionsRequest)

Disables the actions for the specified alarms. When an alarm's actions are disabled, the alarm actions do not execute when the alarm state changes.

Parameters:

disableAlarmActionsRequest -

Returns:

A Java Future containing the result of the DisableAlarmActions operation returned by the service.

See Also:

AWS API Documentation

enableAlarmActions

default CompletableFuture<EnableAlarmActionsResponse> enableAlarmActions(EnableAlarmActionsRequest enableAlarmActionsRequest)

Enables the actions for the specified alarms.

Parameters:

enableAlarmActionsRequest -

Returns:

A Java Future containing the result of the EnableAlarmActions operation returned by the service.

See Also:

AWS API Documentation

getMetricStatistics

default CompletableFuture<GetMetricStatisticsResponse> getMetricStatistics(GetMetricStatisticsRequest getMetricStatisticsRequest)

Gets statistics for the specified metric.

Amazon CloudWatch retains metric data as follows:

• Data points with a period of 60 seconds (1 minute) are available for 15 days

• Data points with a period of 300 seconds (5 minute) are available for 63 days

• Data points with a period of 3600 seconds (1 hour) are available for 455 days (15 months)

Note that CloudWatch started retaining 5-minute and 1-hour metric data as of 9 July 2016.

The maximum number of data points returned from a single call is 1,440. If you request more than 1,440 data points, Amazon CloudWatch returns an error. To reduce the number of data points, you can narrow the specified time range and make multiple requests across adjacent time ranges, or you can increase the specified period. A period can be as short as one minute (60 seconds). Note that data points are not returned in chronological order.

Amazon CloudWatch aggregates data points based on the length of the period that you specify. For example, if you request statistics with a one-hour period, Amazon CloudWatch aggregates all data points with time stamps that fall within each one-hour period. Therefore, the number of values aggregated by CloudWatch is larger than the number of data points returned.

CloudWatch needs raw data points to calculate percentile statistics. If you publish data using a statistic set instead, you cannot retrieve percentile statistics for this data unless one of the following conditions is true:

• The SampleCount of the statistic set is 1

• The Min and the Max of the statistic set are equal

For a list of metrics and dimensions supported by AWS services, see the Amazon CloudWatch Metrics and Dimensions Reference in the Amazon CloudWatch User Guide.

Parameters:

getMetricStatisticsRequest -

Returns:

A Java Future containing the result of the GetMetricStatistics operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• InvalidParameterValueException The value of an input parameter is bad or out-of-range.
• MissingRequiredParameterException An input parameter that is required is missing.
• InvalidParameterCombinationException Parameters that cannot be used together were used together.
• InternalServiceException Request processing has failed due to some unknown error, exception, or failure.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

listMetrics

default CompletableFuture<ListMetricsResponse> listMetrics(ListMetricsRequest listMetricsRequest)

List the specified metrics. You can use the returned metrics with GetMetricStatistics to obtain statistical data.

Up to 500 results are returned for any one call. To retrieve additional results, use the returned token with subsequent calls.

After you create a metric, allow up to fifteen minutes before the metric appears. Statistics about the metric, however, are available sooner using GetMetricStatistics.

Parameters:

listMetricsRequest -

Returns:

A Java Future containing the result of the ListMetrics operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• InternalServiceException Request processing has failed due to some unknown error, exception, or failure.
• InvalidParameterValueException The value of an input parameter is bad or out-of-range.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

putMetricAlarm

default CompletableFuture<PutMetricAlarmResponse> putMetricAlarm(PutMetricAlarmRequest putMetricAlarmRequest)

Creates or updates an alarm and associates it with the specified metric. Optionally, this operation can associate one or more Amazon SNS resources with the alarm.

When this operation creates an alarm, the alarm state is immediately set to INSUFFICIENT_DATA. The alarm is evaluated and its state is set appropriately. Any actions associated with the state are then executed.

When you update an existing alarm, its state is left unchanged, but the update completely overwrites the previous configuration of the alarm.

If you are an AWS Identity and Access Management (IAM) user, you must have Amazon EC2 permissions for some operations:

• ec2:DescribeInstanceStatus and ec2:DescribeInstances for all alarms on EC2 instance status metrics

• ec2:StopInstances for alarms with stop actions

• ec2:TerminateInstances for alarms with terminate actions

• ec2:DescribeInstanceRecoveryAttribute and ec2:RecoverInstances for alarms with recover actions

If you have read/write permissions for Amazon CloudWatch but not for Amazon EC2, you can still create an alarm, but the stop or terminate actions won't be performed. However, if you are later granted the required permissions, the alarm actions that you created earlier will be performed.

If you are using an IAM role (for example, an Amazon EC2 instance profile), you cannot stop or terminate the instance using alarm actions. However, you can still see the alarm state and perform any other actions such as Amazon SNS notifications or Auto Scaling policies.

If you are using temporary security credentials granted using the AWS Security Token Service (AWS STS), you cannot stop or terminate an Amazon EC2 instance using alarm actions.

Note that you must create at least one stop, terminate, or reboot alarm using the Amazon EC2 or CloudWatch console to create the EC2ActionsAccess IAM role. After this IAM role is created, you can create stop, terminate, or reboot alarms using a command-line interface or an API.

Parameters:

putMetricAlarmRequest -

Returns:

A Java Future containing the result of the PutMetricAlarm operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• LimitExceededException The quota for alarms for this customer has already been reached.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

putMetricData

default CompletableFuture<PutMetricDataResponse> putMetricData(PutMetricDataRequest putMetricDataRequest)

Publishes metric data points to Amazon CloudWatch. Amazon CloudWatch associates the data points with the specified metric. If the specified metric does not exist, Amazon CloudWatch creates the metric. When Amazon CloudWatch creates a metric, it can take up to fifteen minutes for the metric to appear in calls to ListMetrics.

Each PutMetricData request is limited to 40 KB in size for HTTP POST requests.

Although the Value parameter accepts numbers of type Double, Amazon CloudWatch rejects values that are either too small or too large. Values must be in the range of 8.515920e-109 to 1.174271e+108 (Base 10) or 2e-360 to 2e360 (Base 2). In addition, special values (e.g., NaN, +Infinity, -Infinity) are not supported.

You can use up to 10 dimensions per metric to further clarify what data the metric collects. For more information on specifying dimensions, see Publishing Metrics in the Amazon CloudWatch User Guide.

Data points with time stamps from 24 hours ago or longer can take at least 48 hours to become available for GetMetricStatistics from the time they are submitted.

CloudWatch needs raw data points to calculate percentile statistics. If you publish data using a statistic set instead, you cannot retrieve percentile statistics for this data unless one of the following conditions is true:

• The SampleCount of the statistic set is 1

• The Min and the Max of the statistic set are equal

Parameters:

putMetricDataRequest -

Returns:

A Java Future containing the result of the PutMetricData operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• InvalidParameterValueException The value of an input parameter is bad or out-of-range.
• MissingRequiredParameterException An input parameter that is required is missing.
• InvalidParameterCombinationException Parameters that cannot be used together were used together.
• InternalServiceException Request processing has failed due to some unknown error, exception, or failure.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation

setAlarmState

default CompletableFuture<SetAlarmStateResponse> setAlarmState(SetAlarmStateRequest setAlarmStateRequest)

Temporarily sets the state of an alarm for testing purposes. When the updated state differs from the previous value, the action configured for the appropriate state is invoked. For example, if your alarm is configured to send an Amazon SNS message when an alarm is triggered, temporarily changing the alarm state to ALARM sends an Amazon SNS message. The alarm returns to its actual state (often within seconds). Because the alarm state change happens very quickly, it is typically only visible in the alarm's History tab in the Amazon CloudWatch console or through DescribeAlarmHistory.

Parameters:

setAlarmStateRequest -

Returns:

A Java Future containing the result of the SetAlarmState operation returned by the service.
The CompletableFuture returned by this method can be completed exceptionally with the following exceptions.

• ResourceNotFoundException The named resource does not exist.
• InvalidFormatException Data was not syntactically valid JSON.
• SdkBaseException Base class for all exceptions that can be thrown by the SDK (both service and client). Can be used for catch all scenarios.
• SdkClientException If any client side error occurs such as an IO related failure, failure to get credentials, etc
• CloudWatchException Base class for all service exceptions. Unknown exceptions will be thrown as an instance of this

See Also:

AWS API Documentation