DYNAMIC REST SERVICES ORCHESTRATION USING THE KNOWLEDGE BASE

2019 ◽  
Author(s):  
Kostyantyn Kharchenko
Keyword(s):  
Knowledge Base ◽  
Service Oriented Architecture ◽  
Main Idea ◽  
The Real ◽  
Server Side ◽  
Service Oriented ◽  
Services Orchestration ◽  
Client Side ◽  
Abstract Operation ◽  
Microservice Architecture

The approach to organizing the automated calculations’ execution process using the web services (in particular, REST-services) is reviewed. The given solution will simplify the procedure of introduction of the new functionality in applied systems built according to the service-oriented architecture and microservice architecture principles. The main idea of the proposed solution is in maximum division of the server-side logic development and the client-side logic, when clients are used to set the abstract computation goals without any dependencies to existing applied services. It is proposed to rely on the centralized scheme to organize the computations (named as orchestration) and to put to the knowledge base the set of rules used to build (in multiple steps) the concrete computational scenario from the abstract goal. It is proposed to include the computing task’s execution subsystem to the software architecture of the applied system. This subsystem is composed of the service which is processing the incoming requests for execution, the service registry and the orchestration service. The clients send requests to the execution subsystem without any references to the real-world services to be called. The service registry searches the knowledge base for the corresponding input request template, then the abstract operation description search for the request template is performed. Each abstract operation may already have its implementation in the form of workflow composed of invocations of the real applied services’ operations. In case of absence of the corresponding workflow in the database, this workflow implementation could be synthesized dynamically according to the input and output data and the functionality description of the abstract operation and registered applied services. The workflows are executed by the orchestrator service. Thus, adding some new functions to the client side can be possible without any changes at the server side. And vice versa, adding new services can impact the execution of the calculations without updating the clients.

Patterns for Migration of SOA Based Applications to Microservices Architecture

2021 ◽  
Author(s):  
Vinay Raj ◽  
Ravichandra Sadam
Keyword(s):  
Programming Languages ◽  
Service Oriented Architecture ◽  
Legacy Systems ◽  
Loose Coupling ◽  
Enterprise Service Bus ◽  
Web Based ◽  
Enterprise Applications ◽  
Service Oriented ◽  
Key Features ◽  
Microservice Architecture

Service oriented architecture (SOA) has been widely used in the design of enterprise applications over the last two decades. Though SOA has become popular in the integration of multiple applications using the enterprise service bus, there are few challenges related to delivery, deployment, governance, and interoperability of services. To overcome the design and maintenance challenges in SOA, a new architecture of microservices has emerged with loose coupling, independent deployment, and scalability as its key features. With the advent of microservices, software architects have started to migrate legacy systems to microservice architecture. However, many challenges arise during the migration of SOA to microservices, including the decomposition of SOA to microservice, the testing of microservices designed using different programming languages, and the monitoring the microservices. In this paper, we aim to provide patterns for the most recurring problems highlighted in the literature i.e, the decomposition of SOA services, the size of each microservice, and the detection of anomalies in microservices. The suggested patterns are combined with our experience in the migration of SOA-based applications to the microservices architecture, and we have also used these patterns in the migration of other SOA applications. We evaluated these patterns with the help of a standard web-based application.

Web Service Enabled Online Laboratory

2010 ◽  
pp. 1236-1252
Author(s):  
Yuhong Yan ◽  
Yong Liang ◽  
Abhijeet Roy ◽  
Xinge Du
Keyword(s):  
Web Services ◽  
Virtual Instrument ◽  
Structural Engineering ◽  
Chemical Engineering ◽  
Service Oriented Architecture ◽  
Instrument Panel ◽  
System A ◽  
Online Laboratory ◽  
Service Oriented ◽  
Client Side

Online experimentation allows students from anywhere to operate remote instruments at any time. The current techniques constrain users to bind to products from one company and install client side software. We use Web services and Service Oriented Architecture to improve the interoperability and usability of the remote instruments. Under a service oriented architecture for online experiment system, a generic methodology to wrap commercial instruments using IVI and VISA standard as Web services is developed. We enhance the instrument Web services into stateful services so that they can manage user booking and persist experiment results. We also benchmark the performance of this system when SOAP is used as the wire format for communication and propose solutions to optimize performance. In order to avoid any installation at the client side, the authors develop Web 2.0 based techniques to display the virtual instrument panel and real time signals with just a standard Web browser. The technique developed in this article can be widely used for different real laboratories, such as microelectronics, chemical engineering, polymer crystallization, structural engineering, and signal processing.

Web Service Enabled Online Laboratory

2013 ◽  
pp. 363-381
Author(s):  
Yuhong Yan ◽  
Yong Liang ◽  
Abhijeet Roy ◽  
Xinge Du
Keyword(s):  
Web Services ◽  
Virtual Instrument ◽  
Structural Engineering ◽  
Chemical Engineering ◽  
Service Oriented Architecture ◽  
Instrument Panel ◽  
System A ◽  
Online Laboratory ◽  
Service Oriented ◽  
Client Side

Online experimentation allows students from anywhere to operate remote instruments at any time. The current techniques constrain users to bind to products from one company and install client side software. We use Web services and Service Oriented Architecture to improve the interoperability and usability of the remote instruments. Under a service oriented architecture for online experiment system, a generic methodology to wrap commercial instruments using IVI and VISA standard as Web services is developed. We enhance the instrument Web services into stateful services so that they can manage user booking and persist experiment results. We also benchmark the performance of this system when SOAP is used as the wire format for communication and propose solutions to optimize performance. In order to avoid any installation at the client side, the authors develop Web 2.0 based techniques to display the virtual instrument panel and real time signals with just a standard Web browser. The technique developed in this article can be widely used for different real laboratories, such as microelectronics, chemical engineering, polymer crystallization, structural engineering, and signal processing.

Security Evaluation of Service-Oriented Systems Using the SiSOA Method

2011 ◽  
Vol 2 (4) ◽  
pp. 19-33 ◽  
Author(s):  
Christian Jung ◽  
Manuel Rudolph ◽  
Reinhard Schwarz
Keyword(s):  
Knowledge Base ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
General Structure ◽  
Security Analysis ◽  
Complex Problem ◽  
Security Evaluation ◽  
Structural Level ◽  
Service Oriented ◽  
Automated Support

The Service-Oriented Architecture paradigm (SOA) is commonly applied for the implementation of complex, distributed business processes. The service-oriented approach promises higher flexibility, interoperability and reusability of the IT infrastructure. However, evaluating the quality attribute security of such complex SOA configurations is not sufficiently mastered yet. To tackle this complex problem, the authors developed a method for evaluating the security of existing service-oriented systems on the architectural level. The method is based on recovering security-relevant facts about the system by using reverse engineering techniques and subsequently providing automated support for further interactive security analysis at the structural level. By using generic, system-independent indicators and a knowledge base, the method is not limited to a specific programming language or technology. Therefore, the method can be applied to various systems and adapt it to specific evaluation needs. The paper describes the general structure of the method, the knowledge base, and presents an instantiation aligned to the Service Component Architecture (SCA) specification.

APPLYING ORCHESTRATION AND CHOREOGRAPHY OF WEB SERVICES ON DYNAMIC VIRTUAL MARKETPLACES

2006 ◽  
Vol 15 (01) ◽  
pp. 57-85 ◽  
Author(s):  
IVO JOSÉ GARCIA DOS SANTOS ◽  
EDMUNDO ROBERTO MAURO MADEIRA
Keyword(s):  
Web Services ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
Heterogeneous Systems ◽  
The Internet ◽  
Virtual Enterprises ◽  
Great Chance ◽  
Dynamic Composition ◽  
Service Oriented ◽  
Services Orchestration

The Service-Oriented Architecture promises to be an affordable solution for the integration of heterogeneous systems through the Internet. In the e-Business field, this promise represents a great chance for companies to increase competitiveness and to enable the enactment of new collaborative e-Business processes. In this paper, we present a Virtual Marketplace infrastructure, the VM-Flow, which uses Dynamic Composition of Web Services (Orchestration and Choreography) as a fundamental technique to enable interorganizational business interactions in the context of Dynamic Virtual Enterprises. The VM-Flow platform is workflow-based and also introduces a series of interaction policies to deal with aspects like autonomy and privacy. A platform model is presented together with details on the infrastructure prototype and on an application built over it.

Web Service Enabled Online Laboratory

2009 ◽  
Vol 6 (4) ◽  
pp. 75-93 ◽  
Author(s):  
Yuhong Yan ◽  
Yong Liang ◽  
Abhijeet Roy ◽  
Xinge Du
Keyword(s):  
Web Services ◽  
Virtual Instrument ◽  
Structural Engineering ◽  
Chemical Engineering ◽  
Service Oriented Architecture ◽  
Instrument Panel ◽  
System A ◽  
Online Laboratory ◽  
Service Oriented ◽  
Client Side

Online experimentation allows students from anywhere to operate remote instruments at any time. The current techniques constrain users to bind to products from one company and install client side software. We use Web services and Service Oriented Architecture to improve the interoperability and usability of the remote instruments. Under a service oriented architecture for online experiment system, a generic methodology to wrap commercial instruments using IVI and VISA standard as Web services is developed. We enhance the instrument Web services into stateful services so that they can manage user booking and persist experiment results. We also benchmark the performance of this system when SOAP is used as the wire format for communication and propose solutions to optimize performance. In order to avoid any installation at the client side, the authors develop Web 2.0 based techniques to display the virtual instrument panel and real time signals with just a standard Web browser. The technique developed in this article can be widely used for different real laboratories, such as microelectronics, chemical engineering, polymer crystallization, structural engineering, and signal processing.

Security Evaluation of Service-Oriented Systems Using the SiSOA Method

2012 ◽  
pp. 20-35
Author(s):  
Christian Jung ◽  
Manuel Rudolph ◽  
Reinhard Schwarz
Keyword(s):  
Knowledge Base ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
General Structure ◽  
Security Analysis ◽  
Complex Problem ◽  
Security Evaluation ◽  
Structural Level ◽  
Service Oriented ◽  
Automated Support

The Service-Oriented Architecture paradigm (SOA) is commonly applied for the implementation of complex, distributed business processes. The service-oriented approach promises higher flexibility, interoperability and reusability of the IT infrastructure. However, evaluating the quality attribute security of such complex SOA configurations is not sufficiently mastered yet. To tackle this complex problem, the authors developed a method for evaluating the security of existing service-oriented systems on the architectural level. The method is based on recovering security-relevant facts about the system by using reverse engineering techniques and subsequently providing automated support for further interactive security analysis at the structural level. By using generic, system-independent indicators and a knowledge base, the method is not limited to a specific programming language or technology. Therefore, the method can be applied to various systems and adapt it to specific evaluation needs. The paper describes the general structure of the method, the knowledge base, and presents an instantiation aligned to the Service Component Architecture (SCA) specification.

PROFESSIONALS FOR INTELLECTUAL SERVICE-ORIENTED DISTRIBUTED COMPUTING ENVIRONMENTS

2019 ◽  
Author(s):  
Anatoly Petrenko
Keyword(s):  
Distributed Computing ◽  
Programming Languages ◽  
Business Processes ◽  
Service Oriented Architecture ◽  
Special Software ◽  
Service Oriented ◽  
Business Functions ◽  
Subject Areas ◽  
Computing Environments ◽  
Microservice Architecture

A new programming paradigm is considered, not related to objects, but to business processes and their components — business functions, when the layout of applications is carried out by identifying and calling services (special software components with unified interfaces), available on the network to perform the necessary task. This approach is independent of specific programming languages ​​and operating systems, and involves the use of a service-oriented architecture (SOA) of applications built on formalized business processes whose functions are presented as reusable services with transparently described interfaces. The fundamentals of the educational program for the training of specialists are considered who are able to meet the need for effective implementation of new paradigms of distributed computing (on the example of cloud computing, microservice architecture, semantic technologies); for creating an online toolkit that allows end users to dynamically compile application workflows according to their scripts in different subject areas; for filling and merging repositories of web services that can run on different cloud sites in distributed computing environments.

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