Overview

FioranoMQ introduces the concept of a 'Durable Connection'. A Durable Connection remains connected to the FioranoMQ Server at all time. Applications using durable connections do not have to store, re-connect and then forward stored messages to the server. This frees up the application from the complex task of building a 'store and forward' mechanism in application code.
The reliability of the underlying JMS transport is improved by durable connections. If the connection is lost and the application fails to transfer data, Durable Connections try to restore the connection automatically. This ensures that data is not lost in transit and is sent as soon as the connection is re-established. These activities are not visible to the application and are performed automatically by Fiorano's runtime library when it detects a connection failure. This makes the system reliable and robust even in the presence of network failures.
For example, consider a computer monitoring a steel mill. Real time steel production information is sent every second to a main hub. The main hub uses this information to generate the desired results. If the connection between the Process computer and the Hub breaks, the 'send' mechanism will fail and an exception is thrown. Since this data is generated only once, the application stores this data on encountering the exception and then applies its resources to connect back to the server. This process adds a considerable load to the application.
In such cases, a Durable Connection comes to the rescue as it does all the hard work on behalf of the application. It automatically tries to re-establish the connection, stores the data in transit and sends it to the server as soon as the connection is restored.
Note: Durable Connections are a proprietary feature of FioranoMQ. Durable Subscriptions are a part of JMS specifications.