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Chapter 21. AWS CloudWatch Component

Available as of Camel version 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 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.

21.1. URI Format
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aws-cw://namespace[?options]
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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&…​

21.2. URI Options
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The AWS CloudWatch component supports 5 options which are listed below.

Expand
NameDescriptionDefaultType

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
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with the following path and query parameters:

21.2.1. Path Parameters (1 parameters):
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Expand
NameDescriptionDefaultType

namespace

Required The metric namespace

 

String

21.2.2. Query Parameters (11 parameters):
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Expand
NameDescriptionDefaultType

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

Required CW component options

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

21.3. Usage
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21.3.1. Message headers evaluated by the CW producer
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Expand
HeaderTypeDescription

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.

21.3.2. Advanced AmazonCloudWatch configuration
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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");
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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);
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21.4. Dependencies
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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>
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where ${camel-version} must be replaced by the actual version of Camel (2.10 or higher).

21.5. See Also
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  • Configuring Camel
  • Component
  • Endpoint
  • Getting Started
  • AWS Component
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