Introduction

Message Brokers represent the most flexible type of inter-application communication architecture today:
they simplify the logical connections among multiple application systems.

A message broker is a value-added, application-to-application middleware service,
composed of one or more software facilities, and capable of one-to-many, many-to-one and many-to-many message distribution.

A message broker is an architectural concept, a way of using middleware, rather than an off-the-shelf product.

Message brokers are logical entities, distinct from senders and receivers, that coordinate message distribution. By formalizing and making inter-application links explicit, message brokers provide a logical place to implement a variety of value-added services such as message transformation (a type of translation).

Compared to a more traditional synchronous approach, such as Client/Server software solutions, OpenMOM offers unique features :

Transparent communication across operating systems and languages.

Dynamic definition of your correspondents.

Flexible approach : you move your application across systems with no interruption.

Ease of use : An application can send a message regardless of the receiver's availability or of a session's initialization.

Asynchronous messaging facility (no locked-up client).

Optional synchronous facility ( fast RPC mechanism)

Seamless communication between objects.

Performance : Parallel servers and services with dynamic load balancing.

Multiplexing of server and network communication requests.

Automatic message queuing facility for ad-hoc requests.

Fast transfer of important volumes of messages.

Small software footprint.

Stability : The server guarantees the delivery and integrity of messages ,independently of the system or network availability.

Openness : Supports the major network protocols and development languages.

Straightforward implementation : OpenMOM requires little training, programming and administration.