Azure Storage Queue Service

Since Camel 2.19

The Azure Queue component supports storing and retrieving the messages to/from Azure Storage Queue service.

Prerequisites

You must have a valid Microsoft Azure account. More information is available at Azure Portal.

URI Format

azure-queue://accountName/queueName[?options]

The queue will be created if it does not already exist.

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

For example in order to get a message content from the queue messageQueue in the camelazure storage account and, use the following snippet:

from("azure-queue:/camelazure/messageQueue").
to("file://queuedirectory");

URI Options

The Azure Storage Queue Service component has no options.

The Azure Storage Queue Service endpoint is configured using URI syntax:

azure-queue:containerAndQueueUri

with the following path and query parameters:

Path Parameters (1 parameters):

Name Description Default Type

containerAndQueueUri

Required Container Queue compact Uri

String

Query Parameters (10 parameters):

Name Description Default Type

azureQueueClient (common)

The queue service client

CloudQueue

credentials (common)

Set the storage credentials, required in most cases

StorageCredentials

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

messageTimeToLive (producer)

Message Time To Live in seconds

int

messageVisibilityDelay (producer)

Message Visibility Delay in seconds

int

operation (producer)

Queue service operation hint to the producer

listQueues

QueueServiceOperations

queuePrefix (producer)

Set a prefix which can be used for listing the queues

String

synchronous (advanced)

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

false

boolean

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-azure-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 2 options, which are listed below.

Name Description Default Type

camel.component.azure-queue.enabled

Enable azure-queue component

true

Boolean

camel.component.azure-queue.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

Required Azure Storage Queue Service component options

You have to provide the containerAndQueue URI and the credentials.

Usage

Message headers evaluated by the Azure Storage Queue Service producer

Header Type Description

Message headers set by the Azure Storage Queue Service producer

Header Type Description

Message headers set by the Azure Storage Queue Service producer consumer

Header Type Description

Azure Queue Service operations

Operation Description

listQueues

List the queues.

createQueue

Create the queue.

deleteQueue

Delete the queue.

addMessage

Add a message to the queue.

retrieveMessage

Retrieve a message from the queue.

peekMessage

View the message inside the queue, for example, to determine whether the message arrived at the correct queue.

updateMessage

Update the message in the queue.

deleteMessage

Delete the message in the queue.

Azure Queue Client configuration

If your Camel Application is running behind a firewall or if you need to have more control over the Azure Queue Client configuration, you can create your own instance:

StorageCredentials credentials = new StorageCredentialsAccountAndKey("camelazure", "thekey");

CloudQueue client = new CloudQueue("camelazure", credentials);

registry.bind("azureQueueClient", client);

and refer to it in your Camel azure-queue component configuration:

from("azure-queue:/camelazure/messageQueue?azureQueueClient=#client")
.to("mock:result");

Dependencies

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

pom.xml

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

where ${camel-version} must be replaced by the actual version of Camel (2.19.0 or higher).

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