AWS CloudWatch

Since Camel 2.11

The CW component allows messages to be sent to an Amazon CloudWatch metrics. The implementation of the Amazon API is provided by the http://aws.amazon.com/sdkforjava/[AWS SDK].

Prerequisites

You must have a valid Amazon Web Services developer account, and be signed up to use Amazon CloudWatch. More information are available at Amazon CloudWatch.

URI Format

aws-cw://namespace[?options]

The metrics will be created if they don’t already exists.

 You can append query options to the URI in the following format,
`?options=value&option2=value&...`

URI Options

The AWS CloudWatch component supports 5 options, which are listed below.

Name Description Default Type

configuration (advanced)

The AWS CW default configuration

CwConfiguration

accessKey (producer)

Amazon AWS Access Key

String

secretKey (producer)

Amazon AWS Secret Key

String

region (producer)

The region in which CW client needs to work

String

resolveProperty Placeholders (advanced)

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

boolean

The AWS CloudWatch endpoint is configured using URI syntax:

aws-cw:namespace

with the following path and query parameters:

Path Parameters (1 parameters):

Name Description Default Type

namespace

Required The metric namespace

String

Query Parameters (11 parameters):

Name Description Default Type

amazonCwClient (producer)

To use the AmazonCloudWatch as the client

AmazonCloudWatch

name (producer)

The metric name

String

proxyHost (producer)

To define a proxy host when instantiating the CW client

String

proxyPort (producer)

To define a proxy port when instantiating the CW client

Integer

region (producer)

The region in which CW client needs to work

String

timestamp (producer)

The metric timestamp

Date

unit (producer)

The metric unit

String

value (producer)

The metric value

Double

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

accessKey (security)

Amazon AWS Access Key

String

secretKey (security)

Amazon AWS Secret Key

String

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-aws-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 16 options, which are listed below.

Name Description Default Type

camel.component.aws-cw.access-key

Amazon AWS Access Key

String

camel.component.aws-cw.configuration.access-key

Amazon AWS Access Key

String

camel.component.aws-cw.configuration.amazon-cw-client

To use the AmazonCloudWatch as the client

AmazonCloudWatch

camel.component.aws-cw.configuration.name

The metric name

String

camel.component.aws-cw.configuration.namespace

The metric namespace

String

camel.component.aws-cw.configuration.proxy-host

To define a proxy host when instantiating the CW client

String

camel.component.aws-cw.configuration.proxy-port

To define a proxy port when instantiating the CW client

Integer

camel.component.aws-cw.configuration.region

The region in which CW client needs to work

String

camel.component.aws-cw.configuration.secret-key

Amazon AWS Secret Key

String

camel.component.aws-cw.configuration.timestamp

The metric timestamp

Date

camel.component.aws-cw.configuration.unit

The metric unit

String

camel.component.aws-cw.configuration.value

The metric value

Double

camel.component.aws-cw.enabled

Enable aws-cw component

true

Boolean

camel.component.aws-cw.region

The region in which CW client needs to work

String

camel.component.aws-cw.resolve-property-placeholders

Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders.

true

Boolean

camel.component.aws-cw.secret-key

Amazon AWS Secret Key

String

Required CW component options

You have to provide the amazonCwClient in the Registry or your accessKey and secretKey to access the Amazon’s CloudWatch.

Usage

Message headers evaluated by the CW producer

Header Type Description

CamelAwsCwMetricName

String

The Amazon CW metric name.

CamelAwsCwMetricValue

Double

The Amazon CW metric value.

CamelAwsCwMetricUnit

String

The Amazon CW metric unit.

CamelAwsCwMetricNamespace

String

The Amazon CW metric namespace.

CamelAwsCwMetricTimestamp

Date

The Amazon CW metric timestamp.

CamelAwsCwMetricDimensionName

String

Camel 2.12: The Amazon CW metric dimension name.

CamelAwsCwMetricDimensionValue

String

Camel 2.12: The Amazon CW metric dimension value.

CamelAwsCwMetricDimensions

Map<String, String>

Camel 2.12: A map of dimension names and dimension values.

Advanced AmazonCloudWatch configuration

If you need more control over the AmazonCloudWatch instance configuration you can create your own instance and refer to it from the URI:

from("direct:start")
.to("aws-cw://namepsace?amazonCwClient=#client");

The #client refers to a AmazonCloudWatch in the Registry.

For example if your Camel Application is running behind a firewall:

AWSCredentials awsCredentials = new BasicAWSCredentials("myAccessKey", "mySecretKey");
ClientConfiguration clientConfiguration = new ClientConfiguration();
clientConfiguration.setProxyHost("http://myProxyHost");
clientConfiguration.setProxyPort(8080);

AmazonCloudWatch client = new AmazonCloudWatchClient(awsCredentials, clientConfiguration);

registry.bind("client", client);

Dependencies

Maven users will need to add the following dependency to their pom.xml.

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel (2.10 or higher).

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