The notion of “programming to interfaces rather than implementation” only existed in the programming models such as Java and C++, but was never part of the architectural style until the advent of SOA and services. But it requires huge initial investment and change in mindset to adapt to new technology. During design time, information such as metadata about service contracts gets stored in the Service Repository ABB in the Governance Layer and policy associated with services are defined using the Policy Manager ABB in the Governance Layer. These ABBs include but are not limited to the Data Validator, Data Aggregator, Content Manager, Data Repository, and Data Federation. In turn, these ABBs in the process layer implement ABBs from other layers, like the Business Rules Manager, where business rules are defined, in the Governance Layer. SOA is an approach for distributed systems architecture that employs loosely coupled services, standard interfaces and protocols, to deliver seamless cross-platform integration. Management services are a category of services that represent the set of management tools used to monitor service flows, the health of the underlying system, the utilization of resources, the identification of outages and bottlenecks, the attainment of service goals, the enforcement of administrative policies, and recovery from failures. This layer can be thought of as containing the service descriptions for business capabilities and services as well as their IT manifestation during design time, as well as service contract and descriptions that will be used at runtime. Infrastructure services implement or use implementations of the Solution Component, Implementation Controller, as well as Hardware and Virtualized Infrastructure ABBs. Information services are a category of services that contain the data logic of business design. For instance, a Service Container may be contained within a J2EE environment or a .NET environment. This ABB is one of the core functional ABBs in SOA RA. Interactions with the external world are not limited to just interactions with humans; interaction logic orchestrates the interface to all kinds of devices and control systems, including vehicles, sensors, and RFID devices. It provides functionalities for the composition of a single service offered by the networked objects to build specific applications. It aims at providing middleware that serves third-party value-added services and applications at a higher application layer. A Service-Oriented Architecture (SOA) is defined by the set of functional and Non-Functional Requirements (NFRs) that constrain it. Let’s highlight some of the key aspects of these soa principles here: SOA Layer or Framework consist of two-layer: horizontal layers and vertical layers. Middleware Architecture & SOA Technology. The model consists of Object layer, Component layer, Service layer, process layer and Enterprise layer. Within the Service Container are ABBs which enable it to invoke and execute service components, and support the integration with the cross-cutting layers – the Quality of Service Layer, Integration Layer, and Governance Layer. Service layer is the middle layer between presentation and data store. See Service Registry ABB in the Governance Layer. Interaction services are most closely aligned with the Consumer Layer. These services include the policies and constraints that other businesses must conform with to work within the business. A Service-Oriented Architecture(SOA) is a loosely-coupled, reusable software component, which encapsulates different functionalities which are distributed and. 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