Messaging Protocols. Messaging Servers. RabbitMQ - AMQP 0-9-1 Model Explained. Overview This guide provides an overview of the AMQP 0-9-1 protocol, one of the protocols supported by RabbitMQ. High-level Overview of AMQP 0-9-1 and the AMQP Model What is AMQP 0-9-1? AMQP 0-9-1 (Advanced Message Queuing Protocol) is a messaging protocol that enables conforming client applications to communicate with conforming messaging middleware brokers.
Brokers and Their Role Messaging brokers receive messages from publishers (applications that publish them, also known as producers) and route them to consumers (applications that process them). Since it is a network protocol, the publishers, consumers and the broker can all reside on different machines. AMQP 0-9-1 Model in Brief The AMQP 0-9-1 Model has the following view of the world: messages are published to exchanges, which are often compared to post offices or mailboxes. When publishing a message, publishers may specify various message attributes (message meta-data). AMQP 0-9-1 is a Programmable Protocol Exchanges and Exchange Types. Introduction to the Microsoft ESB Guidance. Event-Driven SOA. By Jürgen Kress, Berthold Maier, Hajo Normann, Danilo Schmeidel, Guido Schmutz, Bernd Trops, Clemens Utschig-Utschig, Torsten Winterberg Part of the Industrial SOA article series December 2013 Abstract: If we consider real companies and their business transactions, we see that the real world is not really service-driven at all, but much more event-driven.
A new customer is created in the system, a new car reservation is made, a vehicle is returned or needs to be taken to the shop. All of these "functions" can be supported by services, but often also by precisely defined process chains. However, complex business processes can rarely be automated "in one piece," as the real exceptions and dependencies of diverse business processes are highly dynamic. Dealing with Business Events Most companies now collect business-relevant information by aggregating available data. What is an Event? The term "event" generally has two meanings.
What does that mean exactly? Figure 1: Event and event notification. Advanced Pub/Sub: Why Do We Need It? By Daniel Amadei Exploring the advanced publish and subscribe features in Oracle Weblogic Server. Published August 2012 Download Oracle WebLogic Server Advanced publish and subscribe (pub/sub) is a relatively new set of features among the many features that are already provided by Oracle WebLogic Server for Java Message Service (JMS) messaging. Advanced pub/sub features go beyond the JMS specification and add more robustness to messaging in Java. The new features bring parallelism to the pub/sub world, providing an implementation of the Competing Consumers integration pattern, which is already present in point-to-point (queues). "Competing Consumers are multiple consumers that are all created to receive messages from a single Point-to-Point Channel.
Oracle WebLogic Server goes a bit further and makes the pattern available also to the pub/sub area, leveraging performance, scalability, and high availability. The Past The original distributed topic architecture was called "replicated. " The Code. Enterprise Service Bus. By Jürgen Kress, Berthold Maier, Hajo Normann, Danilo Schmeidel, Guido Schmutz, Bernd Trops, Clemens Utschig-Utschig, Torsten Winterberg Answers to some of the most important questions surrounding the term "enterprise service bus" using concrete examples, so that the areas of application that can be deemed "correct" for ESBs can be clarified.
Part of the Industrial SOA article series July 2013 Introduction Everyone seems to need to use an enterprise service bus (ESB) nowadays, but there is much confusion about its actual benefit and the various concepts this term entails. This uncertainty is revealed in statements like, "Help! What exactly is the definition of an ESB? Defining the ESB An accepted definition for this term has yet to be firmly established that is most likely caused by a lack of industry standards, whereas standards like BPEL and BPMN 2.0 exist for process engines and other components.
Figure 1: The ESB architecture pattern is divided into these main system architectures.