What is Application Integration in Java

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What is Application Integration
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Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications. Web applications Web applications constitute a particular form of transactional application and therefore retain similar characteristics: Pace: events are processed as and when they occur in production. Availability and ergonomy remain key characteristics. Format: the processed data structures are complex (for example, XML). Volume: since access is performed via the Internet, the potential number of connected users cannot be controlled and can be extremely large. Simultaneity remains critical. Connectivity: more recent, these applications are often much better able to communicate than traditional applications. In addition to databases, they can communicate using Internet technologies (HTTP, SMTP) in particular. Real-time applications These applications made their appearance at the end of the 1990s with the emergence of technologies in inter-application messaging (MOM MessageOriented Middleware see section They function according to logics that can operate in both batch and transactional modes. As a result, their characteristics are hybrid: Pace: these applications handle events in real time, at the same rhythm as their production. Format: the processed data structures can be complex. Volume: as with batch applications, they are designed to support significant volumes, though with lesser performance.12 Connectivity: these applications communicate essentially through APIs (Application Programming Interfaces) relying on MOM queues. Software packages Depending on their destination, commercial software packages exhibit characteristics of one type or another, and for Enterprise Resource Planning (ERP), which by definition covers numerous functions in business IT, practically the sum of these characteristics. At the same time, connectivity long a weak point in software packages has become for most of them a differentiating factor. This is why it is now possible to
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12 Because the integrity constraints at the event/message level are more fine-grained than at
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the level of batch processing.
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Application Integration: EAI, B2B, BPM and SOA
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exchange with these software packages through multiple access points: files, queues, databases, APIs, HTTP, Web-Services, etc. This constitutes an important point concerning the capacity to connect these software packages to the rest of the system. 2.5. EAI: integrating enterprise applications (A2A) The term EAI first appeared in the USA around 1996-1997 with the publication of articles or research notes by large analyst firms, including studies from Roy Schulte (then) of Gartner Group [SCH 97] or those of Mike Gilpin of Giga Group [GIL 99]. These studies analyzed the approaches encountered at a certain number of large enterprises to explain the emergence of a range of problems in integration, which they predicted would become one of the most important problems of the next ten years. However, if the term EAI was invented, conceptualized, and brought to market by North Americans, the precursors in this matter were French. 2.5.1. Accounting interpretation: EAI precursor The concepts and the first operational implementations appeared from 1975, driven by regulatory accounting reforms in banking establishments in France. The pioneers were Jacques Sassoon [SAS 98] and Jean-Paul Leydier. While working on an accounting interpreter based on events and rules, they solidified the principles of event-based transformation of information between operational systems and the accounting system of the Banque de Paris et des Pays-Bas .13 This first implementation opened the way in France to the development of software packages for accounting interpretation (no longer commercially available) such as STEGEC from the St ria corporation and ROCADE from Arthur Andersen. Only the software package R gles du Jeu (RDJ)14 from Sopra Group/Axway, worthy successor to that 1975 accounting interpreter, is still going strong today, with several hundred references in the banking and financial world.
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13 Now part of the banking group BNP Paribas translator s note. 14 Now marketed under the name Synchrony AccountingIntegrator , and for which one of
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the authors of the current work ensured the design and implementation.
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What is Application Integration
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2.5.2. EAI today Today, from reading the articles appearing in specialized journals or viewing the publications from consulting firms, it seems that defining EAI is anything but simple, so different are the various positions staked out by different players in this domain. Still, we would put forward the following definition, which seems to us to accurately reflect various facets of the question: EAI is a collection of methods, tools, and services that work together to bring heterogenous applications into communication, as part of the traditional, distributed or extended enterprise. In other words, the essential problem to resolve is the exchange of information between the applications in the information system, and more specifically, to respond to the question: how can we make sure that heterogenous applications, designed at different periods, by different teams and using different technologies, can communicate, without needing to know each other, or take account of their respective constraints To us, it also seems necessary to insist on what is not in the domain of EAI, because confusion often arises: EAI is in no way concerned with communication inside an application. The problem of communication between the components of one client/server application does not fall in the domain of EAI. That is a problem of application architecture. However, the way in which that client/server application communicates with other applications in the information system constitutes a genuine EAI problem. Moreover, EAI concerns communication between heterogenous applications. Applications that share common repositories and use common semantics and identical technologies do not pose a problem of integration with each other. In other words, homogenous applications are already integrated. Deploying the methods and development tools for creating these integrated applications (for example: application objects integrated around CORBA) does not fall within the domain of EAI. An EAI approach results in applications coexisting with other applications that were built around different technologies, and which are therefore incapable of communicating naturally with each other. EAI therefore deals with the oldest domain in integration: the domain of business applications Application to Application (often shortened to AtoA or A2A ). This is typically the domain of ERP integration, or the integration of front-office applications with the back-office applications, or the integration of software for Customer Relationship Management (CRM), Supply Chain Management (SCM), etc.
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