RabbitMQ Module

Overview

Rabbit Message Queue (RabbitMQ) is a messaging system for application-to-application communication. The RabbitMQ module adds the capability to the Decisions Messaging Service, which lets users connect to built-in Flow steps to manage a Rabbit MQ. The RabbitMQ module allows users to queue subscribers so that Flow can work and push messages to Queues using Flow steps. Users can also integrate with RabbitMQ, take in a message, and then convert the message to any type of data for processing.

To configure RabbitMQ in Decisions, users must install the RabbitMQ module. Refer to Installing Modules article.

Installing RabbitMQ

Refer to RabbitMQ's official website to Download and Install RabbitMQ.

RabbitMQ Settings

1. To establish a connection with a RabbitMQ broker, users must configure the server information in System Settings. This can be found by navigating to System > Settings > RabbitMQ Settings > Right-click and click on Edit action. 
2. Below is a breakdown of each property for the setting.
   
   

   Property	Setting
   Default Server IP or Name	The Default Server IP or name hosting the RabbitMQ broker.
   Use Default Port	When disabled, it opens a new field where the port number can be specified. Ensure the port is open and is not assigned to any other service.
   Default Virtual Host	Optional field used to identify the virtual host location. Due to RabbitMQ being a multi-tenant system, it allows for a specific tenant to be used as the connected system.
   Default User Name	Sets the default user name when establishing a connection to RabbitMQ.
   Default Password	Sets the default password for establishing a connection to Rabbit MQ.
   Use SSL	When Enabled, opens a field to enter the Server certificate name.
   Server certificate CN name	Enter the name of the server certificate CN (Common Name / Fully Qualified Domain Name).
   Verify server CN name	When enabled, this will verify the certificate (Common Name / Fully Qualified Domain Name).
   Verify server certificate chain	When enabled, this will verify the certificate chain.

These configurations will serve as global settings for all the RabbitMQ Message Queues that will be created in the next section. 

Connecting to a RabbitMQ

1. Navigate to Systems > Jobs and Events > Message Queues and select Add Rabbit Queue. 
2. On the Add Rabbit Queue dialog window, enter a Display Name and the Queue Name. Configure any other options necessary and click SAVE.
   
   

   DEFINITION
   	Display Name		Determines how the Queue's name displays.
   	Queue Name		The name of the Queue that the system references.
   	Is Durable Queue		When Decisions create the Queue, this setting keeps the Message permanent. If no one is using the Queue, this setting will reclaim the Message Queue and recreate the Message.
   	Auto Delete		Instructs the Message Server to delete the Queue when its last consumer disconnects.
   	Override Server Info		This will override the server settings configured in the RabbitMQ Settings.
   		Server IP or Name	The Server IP or name hosting the RabbitMQ.
   		Use Default Port	When disabled, opens a new field where the port number can be specified. Ensure the port is open and is not assigned to any other service.
   	Virtual Host Override Behaviour
   		Override if Specified (Otherwise use default)	This will override the virtual host configured in the RabbitMQ Setting only if specified.
   		Never Override (Always use default)	Will not allow to override virtual host.
   		Always Override	Will always override the virtual host configured in the RabbitMQ Setting.
   	Override Virtual Host		This will override the Virtual Host configured in the RabbitMQ Settings. Allows the ability to set up multiple virtual hosts allowing the user to host Decisions. The Virtual host runs to keep the actual production from interference.
   	Override Queue Credentials		This will override the credentials configured in the RabbitMQ Settings. Provides the ability to set up a username and password that can be assigned, allowing specific credentials to be required
   	Override SSL		This will override the SSL configured in the RabbitMQ Settings. Enables the use of SSL for specific Message queues.
   		Server certificate CN name	Enter the name of the server certificate CN (Common Name / Fully Qualified Domain Name).
   		Verify server CN name	When enabled, this will verify the CN (Common Name) of the entered certificate.
   		Verify server certificate chain	When enabled, this will verify the certificate chain of the entered certificate.
   QUEUE ARGUMENTS
   	Queue Type		Specifies the queue type (classic, quorum)
   	Dead Letter Exchange		The queue for undelivered or failed messages
   	Dead Letter Routing Key		Routing key for dead letter
   	Maximum Queue Length		Sets the maximum queue length
   	Message TTL (msec)		Sets the message time-to-live in milliseconds.

   These values can be found within the web portal for RabbitMQ under the Queues section. These values must match; otherwise, a new queue will be created within RabbitMQ to match the settings defined in Decisions.  

3. Navigate to System > Jobs and Events > Message Queues. Right-click on the Message Queue and select Control. Select Test Queue to verify the connection with RabbitMQ. If successful, a dialog popup screen will appear, displaying the test result.
   
   

   Configuration Options	Description
   Disable Queue	Disables the queue
   Resync Queue	Recreates the Message Queues if necessary and re-synchronizes with the Message Server
   Start Queue	Starts processing Messages on the Message Queues (if stopped)
   Stop Queue	Stops processing Messages on the Message Queues. The Message Server will hold any unprocessed messages.
   Test Queue	Reads the number of awaiting Messages on the Queue and shows a pop-up with the amount of awaiting Messages

   

   
   

Feature Changes