EAI represents Enterprise Application Integration. It supports an integrated method to connecting the several components of the IT framework- people, applications, platforms, and databases to allow secure, intra and inter-enterprise collaboration.
EAI solutions enable an organization to integrate business processes internally and externally with business partners to generate dynamic environments that provide current and evolving business requirements, thus creating a world organization.
EAI architecture reduces the various interfaces and supports a standard methodology for software integration. The black box EAI solution applies an array of middleware consisting of message broker, transaction processing integration, Database Remote Procedure Calls, Screen scrapers, Java applets, Active X Controls, etc.
The EAI architecture also offers services including application development tools, repository administration, routing, publish/subscribe services, data stream, data conversion, security services, recoverability, and workload balancing.
Hub and spoke architecture is the most common. All applications are linked to the main hub, which is linked to several application spokes. The hub supports centralized services while connectors or adapters offer the services for each spoke or integration point. Adapters support integration with the centralized hub for a definite resource like a relational database or a java application, allowing data or invocation of a process against a definite resource.
The EAI solutions can be classified as a three-layer solution based on the level of integration and functionality. There are three specific layers to EAI solution are as follows −
Communications − The communications layer consists of tools that help in accessing data sources, inter-process communications, network transports, and the description of messages that pass among applications. It contains the facilities for distributing processing over a network and contains the following technologies including TCP/IP, publishes and subscribe, database server protocols and middleware, multicast IP, asynchronous messaging, remote procedure calls, etc.
Routing and Brokering − The function of this layer is to aggregate, broker, transform, filter, and format records so they can be learned by the other systems that are linked by the EAI solution.
Business Intelligence − The Business Intelligence layer plays an essential role in achieving the virtual software. This layer supports an environment that acknowledges messages from the routing and brokering layer. It can use a set of declarative rules to create intelligent business decisions based on organization goals.
This layer is linked to rules analyzers and online analytical processing (OLAP) services to help in the decision-making process. Companies needs to construct this layer for a more proactive and competitive method to conduct business.