Question

To achieve the key goal of messaging for enterprise computing, there are other Java technologies, list and describe 2 of these technologies.

Answer 1

Enterprise Messaging System (EMS) -

Enterprise messaging system (EMS) is a messaging system permitting software applications and systems to communicate semantically with each other. The semantics can be applied by sending precise messages to and from throughout the enterprise systems. The messages are in form of asynchronous data i.e. – “messages not sent or processed in real time”, sent by one application or system to another and stored in the queue of the receiving program until they are processed. The system is not dependent on a specific operating system or any programming language.

One of the example of an application programming interface (API) is Java Message Service implementing Enterprise messaging system (EMS).

Two Other Technologies are described below :

1. Advanced Message Queueing Protocol (AMQP)

After JMS became popular and people started using it frequently, Microsoft launched NMS (.Net Messaging Service) to back their various platform and programming languages though it was working fine but then mistakenly developers forgotten the problem of interoperability i.e. How two programs written in any two different programming languages can be able to communicate with each other over asynchronous messaging. As a result requirement to define a common standard for asynchronous messaging arise. At that time there was no IT standard wire level protocol neither with JMS nor with NMS that will manage to run on any wire level protocol but the API was bound with the programming language. AMQP solved this issue and managed to come up with a standard wire level protocols with some advanced features useful for interoperability including rich messaging needs for the modern applications integrated into that.

Some Key Features of AMQP are as follows:

• Platform independent wire level messaging protocol
• Consumer determined messaging
• Interoperable across various programming languages and platforms
• It is a type of wire level protocol
• It has five exchange types they are - Direct, Fanout, Topic, Headers & system
• Can achieve high performance
• Supports long lived messaging
• Uses SASL and TLS for security purpose

1. Message Queueing Telemetry Transport (MQTT)

As JMS is for Java based enterprise applications and AMQP is suitable for all other application needs. But devices with less computing capability cannot able to support complexities of AMQP as these types of devices require a simplified but interoperable way to communicate. Solution to this problem was come up with MQTT for example MQTT is one of the main components of Internet Of Things (IOT) platform.

Some Key Features of MQTT are as follows:

• Low memory consumption
• Designed to be used for small devices that are able to send small messages over low bandwidth networks
• Does not allow split messages
• Supports publish-subscribe for topics
• No transactional support (only basic acknowledgements)
• Messaging is effectively short-lived
• No connection security maintained