一 .SOA定义
The main driver for SOA is to define an architectural approach that assists in the
flexible integration of IT systems. Organizations spend a considerable amount of
time and money trying to achieve rapid, flexible integration of IT systems across
all elements of the business cycle. The drivers behind this objective include:
SOA主要驱动是为了定义一个体系方法以此来增加在IT系统整合的伸缩性.通过业务周期的所有元素,可以花费一定量的时间和金钱迅速提升体系,IT系统整合的伸缩性.
为此驱动包括:
1> Increasing the speed at which businesses can implement new products and
processes, can change existing ones, or can recombine them in new ways
加速业务实现新产品或者新流程,或改变现有,甚至能以新的方式组合它们.
2> Reducing implementation and ownership costs of IT systems and the
integration between them
减少IT系统实现以及所有权的花费,减少系统之间整合.
3> Enabling flexible pricing models by outsourcing more fine-grained elements of
the business than were previously possible or by moving from fixed to
variable pricing, based on transaction volumes
通过外部采购可伸缩性价值模型比以前更细粒度业务元素,甚至可以基于事务量从固定移动到可变价值
4> Simplifying the integration work that is required by mergers and acquisitions
合并与需求需要简化整合工作.
5> Achieving better IT utilization and return on investment
完成更好IT利用及其投资回报.
6> Achieving implementation of business processes at a level that is
independent from the applications and platforms that are used to support the
processes
在某个级别上对业务流程实现,并从应用和平台中独立来支持流程.
SOA prescribes a set of design principles and an architectural approach to
achieve this rapid, flexible integration.
为了实现快速,可伸缩性整合,SOA 规定了一系列设计原理和一个结构体系方法
二 .SOA体系方法
SOA is an integration architecture approach based on the concept of a service.
The business and infrastructure functions that are required to build distributed
systems are provided as services that collectively, or individually, deliver
application functionality to end-user applications or other services.
SOA specifies that within any given architecture, there should be a consistent
mechanism for services to communicate. That mechanism should be loosely
coupled and support the use of explicit interfaces.
SOA brings the benefits of loose coupling and encapsulation to integration at an
enterprise level. It applies successful concepts proved by Object Oriented
SOA是基于service概念整合体系方法.业务和基本结构运行需要创建分布式系统作为service,并提供共同或私有发布功能性的应用给
终端用户或其他service.SOA仅在任何给定体系指定,可能是从商业到通讯一致的service.商业可能是松散耦合,支持使用外部接口.
SOA提供松耦合行为和在企业级别封装整合.
三 .