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Chapter 38. Azure Storage Queue Service Component

Available as of Camel version 2.19

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

Prerequisites

You must have a valid Windows Azure Storage account. More information is available at Azure Documentation Portal.

38.1. URI Format
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azure-queue://accountName/queueName[?options]
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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");
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38.2. URI Options
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The Azure Storage Queue Service component has no options.

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

azure-queue:containerAndQueueUri
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with the following path and query parameters:

38.2.1. Path Parameters (1 parameters):
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NameDescriptionDefaultType

containerAndQueueUri

Required Container Queue compact Uri

 

String

38.2.2. Query Parameters (10 parameters):
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NameDescriptionDefaultType

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 options 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

Required Azure Storage Queue Service component options

You have to provide the containerAndQueue URI and the credentials.

38.3. Usage
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38.3.4. Azure Queue Service operations
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OperationDescription

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.

38.3.5. Azure Queue Client configuration
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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);
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and refer to it in your Camel azure-queue component configuration: 

from("azure-queue:/camelazure/messageQueue?azureQueueClient=#client")
.to("mock:result");
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38.4. 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-azure</artifactId>
    <version>${camel-version}</version>
</dependency>
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where ${camel-version} must be replaced by the actual version of Camel (2.19.0 or higher).

38.5. See Also
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  • Configuring Camel
  • Component
  • Endpoint
  • Getting Started
  • Azure Component
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