Rio: a dynamic self-healing services architecture using Jini~(TM) networking technology

摘要

Current mainstream distributed Java~(TM) architectures offer great capabilities embracing conventional enterprise architecture patterns and designs. These traditional systems provide robust transaction oriented environments that are in large part focused on data and host processors. Typically, these implementations require that an entire application be deployed on every machine that will be used as a compute resource. In order for this to happen, the application is usually taken down, installed and started with all systems in-sync and knowing about each other. Static environments such as these present an extremely difficult environment to setup, deploy and administer. Next generation distributed systems must be based on more dynamic capabilities such as: 1. Dynamic provisioning of software components at runtime. 2. Become more network centric, harnessing the capabilities of compute resource assets dynamically. 3. Dynamically adapt to the addition and removal of compute resources. 4. Ensure a Quality of Service (QoS) through dependency specifications of software components based on qualitative and quantitative Quality of Service attributes, 5. Support a wide range of compute resources from small J2ME~(TM) enabled devices to massively parallel super computers. These capabilities are directly obtainable by basing next generation, distributed systems on Jini~(TM) Networking Technology. The Jini architecture provides infrastructure elements required to federate and discover other services offering desirable functionality. Also, Jini technology provides a programming model in tune to the dynamics of distributed systems where partial failure is a reality. Ultimately, Jini technology provides the capability to build, maintain, and alter a network of devices, software, and users. Jini networking technology provides the tools for building robust distributed systems, however, to realize a full featured dynamic system architecture you need an additional technology that allows you to dynamically deploy and maintain service components through the network. Intrinsic to this architecture are a set of dynamic capabilities and reliance on a Quality of Service guarantee that improves upon traditional capabilities. This paper will detail a simple and flexible approach for a dynamic service delivery architecture based on the capability to provision services through the network using qualitative and quantitative Quality of Service attributes, and addresses fundamental issues for the development of a dynamic self-healing services environment.