尽管在组装阶段使用RAD是一种很常见的做法，但很多IT企业仅在使用遗留系统方面非常专业。
Although using RAD during the assembly phase is a fairly common practice, many IT businesses are very specialized with only legacy systems.
用户经常对遗留系统有很好的观察。
遗留系统和应用程序适配器。
该公司希望着手进行遗留系统转换活动。
The company wants to embark on a legacy transformation initiative.
遗留系统和应用程序分析。
了解遗留系统的技术限制。
企业无法承受这些遗留系统发生任何中断。
An enterprise cannot afford any disruption in these legacy systems.
其使用的方法经过定制，适合使用遗留系统。
一个客户有多条需要访问遗留系统的业务线。
A customer had several lines of businesses that required access to legacy systems.
一些组织在端到端流程中利用各种遗留系统。
Some organizations work to harness various legacy systems in end-to-end processes.
为新系统和遗留系统的集成采用了什么机制？
What mechanisms have been adopted for the integration of new and legacy systems?
确定应该将哪些遗留系统包括到SOA中来。
Identify which legacy systems you should incorporate into an soa.
第二，用例帮助我们构建遗留系统的假设架构。
Second, the use cases help us build a hypothetical architecture of the legacy system.
服务操作继承了遗留系统的晦涩的组件方法名。
The Web service operations inherited the cryptic legacy component method names.
此方法提供了用于逐步淘汰遗留系统的可行选择。
Such an approach provides a viable option for a phased sunsetting of the legacy system.
遗留系统可以通过Web服务接口来封装和访问。
Legacy systems can be encapsulated and accessed via web service interfaces.
这让数据的每个消费者都和遗留系统发生了紧耦合。
This tightly couples the legacy system with every consumer of the data.
对于已经在生产中的遗留系统，测试确实更加重要。
Indeed tests are even more important for legacy systems already in production.
参与者可以是用户，用户组，服务以及遗留系统等。
Participants stand for users, groups of users, services, legacy systems, etc.
本章提供的一些模式可以有效地从遗留系统实现服务。
The chapter provides several patterns which can be used to efficiently implement services from legacy systems.
当包装遗留系统时，通常由适配器负责提供此类关联信息。
When wrapping legacy systems the responsibility for the provision of such correlation information often lies with the adapter.
因此您在技术变更方面的业务战略应该将遗留系统包括进来。
So your business strategy for change in technology should incorporate legacy systems.
图1中的示例显示了三个再工程为服务提供者的遗留系统。
The example in Figure 1 shows that three legacy systems have been engineered to be service providers.
它支持较新的系统和仅支持批处理接口的遗留系统之间的交互。
It supports interactions between newer systems and legacy systems which support only batch interfaces.
当利用现有的基础架构或集成遗留系统时，必须考虑到这些约束。
These constraints must be taken into consideration when leveraging existing infrastructure or integrating legacy systems.
例如，设想一个合并项目，其中几个遗留系统被迁移到一个环境中。
For example, imagine a consolidation project where several legacy systems are being migrated to a single environment.
次要的目标是，为外部的业务合作伙伴提供同一遗留系统的访问权。
A secondary goal was to position the customer to provide its external business partners access to the same legacy systems.
使用遗留系统或应用程序直接提供的SOAP 或EAI功能。
Use SOAP or EAI capability directly provided by legacy systems or applications.
但很明显，您现有的遗留系统可以继续供您的企业用于改进现有流程。
But it's clear that your legacy systems form the base from which your enterprise can continue to improve upon existing processes.
如果遗留系统是一个好的系统，您的大多数测试还是很有希望通过的。
Hopefully, if the legacy system is a good one, most of your tests will pass.
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