This paper implements Timing-Go, a distributed timed task scheduling system based on a loosely coupled architecture, which solves the problems of poor manageability, poor parallel processing capability, poor task scheduling capability and poor availability of existing timed task scheduling schemes. The system implements the automatic task registration mechanism through Java annotation technology, designs the task visualization management platform, and improves the efficiency of task management; proposes a timing task scheduling trigger scheme based on Quartz core elements, realizes the decoupling of scheduling process and execution process, and improves the performance of timing task scheduling; extends the functions of Quartz scheduling framework, introduces the workflow hierarchical processing mechanism of DAG model and the large task parallel processing mechanism based on consistency Hash algorithm, and improves the execution efficiency of timing tasks. Meanwhile, this paper also proposes a distributed synchronization control mechanism and a series of compensation mechanisms to guarantee the high availability of system operation and task execution. The Timing-Go system implemented in this paper has good performance and scalability, and its effectiveness has been verified by testing.
KEYWORDS: Clouds, Local area networks, Internet of things, Data transmission, Elasticity, Design and modelling, Web services, Portability, Data communications, Computer programming
Web service specifications of WSRF and WSN provide a new method to solve the problem of stateful middleware services. At present, cloud native technology has been widely used in the field of stateful middleware management platform. Based on stateful Web services, a middleware SOA framework for the control of physical examination population has been designed, and its stateful resource encapsulation method and state, message notification mechanism when resource changes and other key technologies have been described in detail. Finally, the middleware has been implemented through Globus Toolkit 4.0, and good application results have been achieved on the medical examination appointment platform.
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