Application Integration: EAI, B2B, BPM and SOA in Java

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Application Integration: EAI, B2B, BPM and SOA
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the provision of an exchange platform favors the distribution and the functional coherence of repositories in the application network and corresponds to the application of rules of membership and data properties. The integration solution will not only handle applying the rules of urbanization proper to exchange management between applications, but it will also have a consequent effect on the rules of urbanization proper to the intra-application construction. 8.4. Limits of integration solutions without IT urbanization It is entirely technically possible to implement integration solutions without applying the particular rules of urbanization. It is true that, over time, these solutions have integrated certain functionalities precisely to make it possible not to be overly concerned with certain rules of urbanization: the provision of technical connectors that can navigate in the databases, in order to reconstruct a business event; the possibility of creating, inside integrations , rules that are so complex that they would tend to be substituted for certain application processes, to the detriment of maintainability and performance. The implementation of integration solutions without relying on all or some of the rules of urbanization can lead back to a purely technical enterprise, with the risk of recreating precisely the complexity of exchanges inside the solution that we had sought to simplify by applying the solution. 8.5. How does IT urbanization support integration solutions In fact the application of the urbanization rules facilitates the more general use of integration solutions, notably on the following points: rapid implementation of SOAs and orchestration of processes via the eventbased approach and the rules of asynchronism; maximal use of the flow managers via the event-based approach, asynchronism rules, and data ownership; readability and ease of maintenance of parameter settings for integration engines via the event-based approach.
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Integration and IT Urbanization
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8.6. The need to correlate integration solutions and urbanization There remains therefore a methodological project that aims to correlate the two approaches: in governance terms, by seeking to group both urbanization and the integration solution inside the same organization of cells or departments; in coherence terms, by coupling and aligning models of urbanization on the one hand, and design and execution of the integration solutions on the other hand. finally, in human terms, by helping staff with predominantly research and methodology profiles collaborate and not simply cohabitate with the operational teams in development and parameter definition, as well as with teams that use the data.
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Choosing an Application Integration Solution
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9.1. General approach Application integration is an approach which both imposes and helps to produce structure, an approach that commits the enterprise for many years. These justify an organized approach to finding the solution and the partner that assist in implementation. The present chapter does not have the ambition of treating in detail the approach to choosing a software solution for enterprises. We will focus only on the elements related to application integration. Figure 9.1 illustrates the global approach to this choice. 9.2. Methodology for calculating return on investment (ROI) 9.2.1. Introduction to the method When it comes to application integration, calculations of return on investment (ROI) are not simple to determine. In the absence of credibility, a number of approaches to choosing a solution do not incorporate such calculations. Such calculations can, however, be useful, because they objectify the perceptions and intuitions of decision-makers, and lead the approach to choosing the solution. They may also help convince decision-makers to free up the necessary budgets.
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Application Integration: EAI, B2B, BPM and SOA
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ROI can be represented by the following equation: ROI = where: GAINS (n) is the sum of the benefits of integration for year n; LOAD (n) is the sum of the workload in integration for year n;
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1 to N 1 to N
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(GAINS LOAD) n
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the algebraic sum of the delta (Gains Load) in each year.
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Figure 9.1. Application integration: choice of solution
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In general, there are no particular difficulties in measuring work and other loads.24 Nothing important should be omitted. Here we find the following costs: initial usage rights for the solution (license of the software packages); annual usage rights including maintenance/evolution and support of the solution (maintenance); charges for training users on the solution; charges for designing and setting parameters of the solution; charges for implementing the solution: - purchasing and hosting of hardware and basic software; - technical operation; - training the operators; - adapting operating procedures; - industrializing solution deployment; change management, organizational adaptation: - management, operational coordination; - alignment of the integration service with the projects that use it. On the other hand, the benefits of the application integration solution are not easy to measure. They are expressed either in terms of load reduction, or in terms of benefit in revenues. It is usual to look for the benefits of productivity in the workstation where the parameters for the integration engine ensure functions for checking, enriching and transforming the dataflows. Numerous providers of application integration solutions announce average benefits of the order of 40% with respect to classic development solutions.25 The fact that many application integration solutions in fact utilize thirdgeneration languages such as Java does not make it easy to achieve the advertised
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24 For the budgetary allocation of charges, see section 10.4. 25 We will see that this value is in fact situated in the upper range of possible benefits with
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