@aws-sdk/client-cloudwatch-logs

Description

AWS SDK for JavaScript CloudWatchLogs Client for Node.js, Browser and React Native.

You can use Amazon CloudWatch Logs to monitor, store, and access your log files from
EC2 instances, CloudTrail, and other sources. You can then retrieve the associated
log data from CloudWatch Logs using the CloudWatch console. Alternatively, you can use
CloudWatch Logs commands in the Amazon Web Services CLI, CloudWatch Logs API, or CloudWatch
Logs SDK.

You can use CloudWatch Logs to:

• 
  

  
  Monitor logs from EC2 instances in real time: You
  can use CloudWatch Logs to monitor applications and systems using log data. For example,
  CloudWatch Logs can track the number of errors that occur in your application logs. Then,
  it can send you a notification whenever the rate of errors exceeds a threshold that you
  specify. CloudWatch Logs uses your log data for monitoring so no code changes are
  required. For example, you can monitor application logs for specific literal terms (such
  as "NullReferenceException"). You can also count the number of occurrences of a literal
  term at a particular position in log data (such as "404" status codes in an Apache access
  log). When the term you are searching for is found, CloudWatch Logs reports the data to a
  CloudWatch metric that you specify.

  
  


• 
  

  
  Monitor CloudTrail logged events: You
  can create alarms in CloudWatch and receive notifications of particular API activity as
  captured by CloudTrail. You can use the notification to perform troubleshooting.

  
  


• 
  

  
  Archive log data: You can use CloudWatch Logs to
  store your log data in highly durable storage. You can change the log retention setting so
  that any log events earlier than this setting are automatically deleted. The CloudWatch
  Logs agent helps to quickly send both rotated and non-rotated log data off of a host and
  into the log service. You can then access the raw log data when you need it.

  
  

Installing

To install this package, simply type add or install @aws-sdk/client-cloudwatch-logs
using your favorite package manager:
- npm install @aws-sdk/client-cloudwatch-logs
- yarn add @aws-sdk/client-cloudwatch-logs
- pnpm add @aws-sdk/client-cloudwatch-logs

Getting Started

$3

The AWS SDK is modulized by clients and commands.
To send a request, you only need to import the CloudWatchLogsClient and
the commands you need, for example ListAnomaliesCommand:

``js
// ES5 example
const { CloudWatchLogsClient, ListAnomaliesCommand } = require("@aws-sdk/client-cloudwatch-logs");
`

`ts
// ES6+ example
import { CloudWatchLogsClient, ListAnomaliesCommand } from "@aws-sdk/client-cloudwatch-logs";
`

$3

To send a request, you:

- Initiate client with configuration (e.g. credentials, region).
- Initiate command with input parameters.
- Call send operation on client with command object as input.
- If you are using a custom http handler, you may call destroy() to close open connections.

`js
// a client can be shared by different commands.
const client = new CloudWatchLogsClient({ region: "REGION" });

const params = { /* input parameters / };
const command = new ListAnomaliesCommand(params);
`

#### Async/await

We recommend using await
operator to wait for the promise returned by send operation as follows:

`js
// async/await.
try {
const data = await client.send(command);
// process data.
} catch (error) {
// error handling.
} finally {
// finally.
}
`

Async-await is clean, concise, intuitive, easy to debug and has better error handling
as compared to using Promise chains or callbacks.

#### Promises

You can also use Promise chaining
to execute send operation.

`js
client.send(command).then(
(data) => {
// process data.
},
(error) => {
// error handling.
}
);
`

Promises can also be called using .catch() and .finally() as follows:

`js
client
.send(command)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
})
.finally(() => {
// finally.
});
`

#### Callbacks

We do not recommend using callbacks because of callback hell,
but they are supported by the send operation.

`js
// callbacks.
client.send(command, (err, data) => {
// process err and data.
});
`

#### v2 compatible style

The client can also send requests using v2 compatible style.
However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post
on modular packages in AWS SDK for JavaScript

`ts
import * as AWS from "@aws-sdk/client-cloudwatch-logs";
const client = new AWS.CloudWatchLogs({ region: "REGION" });

// async/await.
try {
const data = await client.listAnomalies(params);
// process data.
} catch (error) {
// error handling.
}

// Promises.
client
.listAnomalies(params)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
});

// callbacks.
client.listAnomalies(params, (err, data) => {
// process err and data.
});
`

$3

When the service returns an exception, the error will include the exception information,
as well as response metadata (e.g. request id).

`js
try {
const data = await client.send(command);
// process data.
} catch (error) {
const { requestId, cfId, extendedRequestId } = error.$metadata;
console.log({ requestId, cfId, extendedRequestId });
/**
* The keys within exceptions are also parsed.
* You can access them by specifying exception names:
* if (error.name === 'SomeServiceException') {
* const value = error.specialKeyInException;
* }
*/
}
`

Getting Help

Please use these community resources for getting help.
We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.

- Visit Developer Guide
or API Reference.
- Check out the blog posts tagged with aws-sdk-js
on AWS Developer Blog.
- Ask a question on StackOverflow and tag it with aws-sdk-js.
- Join the AWS JavaScript community on gitter.
- If it turns out that you may have found a bug, please open an issue.

To test your universal JavaScript code in Node.js, browser and react-native environments,
visit our code samples repo.

Contributing

This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-cloudwatch-logs` package is updated.
To contribute to client you can check our generate clients scripts.

License

This SDK is distributed under the
Apache License, Version 2.0,
see LICENSE for more information.

Client Commands (Operations List)

AssociateKmsKey

Command API Reference / Input / Output

AssociateSourceToS3TableIntegration

Command API Reference / Input / Output

CancelExportTask

Command API Reference / Input / Output

CancelImportTask

Command API Reference / Input / Output

CreateDelivery

Command API Reference / Input / Output

CreateExportTask

Command API Reference / Input / Output

CreateImportTask

Command API Reference / Input / Output

CreateLogAnomalyDetector

Command API Reference / Input / Output

CreateLogGroup

Command API Reference / Input / Output

CreateLogStream

Command API Reference / Input / Output

CreateScheduledQuery

Command API Reference / Input / Output

DeleteAccountPolicy

Command API Reference / Input / Output

DeleteDataProtectionPolicy

Command API Reference / Input / Output

DeleteDelivery

Command API Reference / Input / Output

DeleteDeliveryDestination

Command API Reference / Input / Output

DeleteDeliveryDestinationPolicy

Command API Reference / Input / Output

DeleteDeliverySource

Command API Reference / Input / Output

DeleteDestination

Command API Reference / Input / Output

DeleteIndexPolicy

Command API Reference / Input / Output

DeleteIntegration

Command API Reference / Input / Output

DeleteLogAnomalyDetector

Command API Reference / Input / Output

DeleteLogGroup

Command API Reference / Input / Output

DeleteLogStream

Command API Reference / Input / Output

DeleteMetricFilter

Command API Reference / Input / Output

DeleteQueryDefinition

Command API Reference / Input / Output

DeleteResourcePolicy

Command API Reference / Input / Output

DeleteRetentionPolicy

Command API Reference / Input / Output

DeleteScheduledQuery

Command API Reference / Input / Output

DeleteSubscriptionFilter

Command API Reference / Input / Output

DeleteTransformer

Command API Reference / Input / Output

DescribeAccountPolicies

Command API Reference / Input / Output

DescribeConfigurationTemplates

Command API Reference / Input / Output

DescribeDeliveries

Command API Reference / Input / Output

DescribeDeliveryDestinations

Command API Reference / Input / Output

DescribeDeliverySources

Command API Reference / Input / Output

DescribeDestinations

Command API Reference / Input / Output

DescribeExportTasks

Command API Reference / Input / Output

DescribeFieldIndexes

Command API Reference / Input / Output

DescribeImportTaskBatches

Command API Reference / Input / Output

DescribeImportTasks

Command API Reference / Input / Output

DescribeIndexPolicies

Command API Reference / Input / Output

DescribeLogGroups

Command API Reference / Input / Output

DescribeLogStreams

Command API Reference / Input / Output

DescribeMetricFilters

Command API Reference / Input / Output

DescribeQueries

Command API Reference / Input / Output

DescribeQueryDefinitions

Command API Reference / Input / Output

DescribeResourcePolicies

Command API Reference / Input / Output

DescribeSubscriptionFilters

Command API Reference / Input / Output

DisassociateKmsKey

Command API Reference / Input / Output

DisassociateSourceFromS3TableIntegration

Command API Reference / Input / Output

FilterLogEvents

Command API Reference / Input / Output

GetDataProtectionPolicy

Command API Reference / Input / Output

GetDelivery

Command API Reference / Input / Output

GetDeliveryDestination

Command API Reference / Input / Output

GetDeliveryDestinationPolicy

Command API Reference / Input / Output

GetDeliverySource

Command API Reference / Input / Output

GetIntegration

Command API Reference / Input / Output

GetLogAnomalyDetector

Command API Reference / Input / Output

GetLogEvents

Command API Reference / Input / Output

GetLogFields

Command API Reference / Input / Output

GetLogGroupFields

Command API Reference / Input / Output

GetLogObject

Command API Reference / Input / Output

GetLogRecord

Command API Reference / Input / Output

GetQueryResults

Command API Reference / Input / Output

GetScheduledQuery

Command API Reference / Input / Output

GetScheduledQueryHistory

Command API Reference / Input / Output

GetTransformer

Command API Reference / Input / Output

ListAggregateLogGroupSummaries

Command API Reference / Input / Output

ListAnomalies

Command API Reference / Input / Output

ListIntegrations

Command API Reference / Input / Output

ListLogAnomalyDetectors

Command API Reference / Input / Output

ListLogGroups

Command API Reference / Input / Output

ListLogGroupsForQuery

Command API Reference / Input / Output

ListScheduledQueries

Command API Reference / Input / Output

ListSourcesForS3TableIntegration

Command API Reference / Input / Output

ListTagsForResource

Command API Reference / Input / Output

ListTagsLogGroup

Command API Reference / Input / Output

PutAccountPolicy

Command API Reference / Input / Output

PutDataProtectionPolicy

Command API Reference / Input / Output

PutDeliveryDestination

Command API Reference / Input / Output

PutDeliveryDestinationPolicy

Command API Reference / Input / Output

PutDeliverySource

Command API Reference / Input / Output

PutDestination

Command API Reference / Input / Output

PutDestinationPolicy

Command API Reference / Input / Output

PutIndexPolicy

Command API Reference / Input / Output

PutIntegration

Command API Reference / Input / Output

PutLogEvents

Command API Reference / Input / Output

PutLogGroupDeletionProtection

Command API Reference / Input / Output

PutMetricFilter

Command API Reference / Input / Output

PutQueryDefinition

Command API Reference / Input / Output

PutResourcePolicy

Command API Reference / Input / Output

PutRetentionPolicy

Command API Reference / Input / Output

PutSubscriptionFilter

Command API Reference / Input / Output

PutTransformer

Command API Reference / Input / Output

StartLiveTail

Command API Reference / Input / Output

StartQuery

Command API Reference / Input / Output

StopQuery

Command API Reference / Input / Output

TagLogGroup

Command API Reference / Input / Output

TagResource

Command API Reference / Input / Output

TestMetricFilter

Command API Reference / Input / Output

TestTransformer

Command API Reference / Input / Output

UntagLogGroup

Command API Reference / Input / Output

UntagResource

Command API Reference / Input / Output

UpdateAnomaly

Command API Reference / Input / Output

UpdateDeliveryConfiguration

Command API Reference / Input / Output

UpdateLogAnomalyDetector

Command API Reference / Input / Output

UpdateScheduledQuery

Command API Reference / Input / Output