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To identify concerns, you may use a viewpoint-oriented approach to requirements engineering to elicit stakeholder requirements and to identify cross-cutting quality of service and policy concerns. The transition from requirements to design can be made by identifying use cases, where each use case represents a stakeholder concern. The problems of...

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There are several standard patterns that can be observed in different types of embedded system. These include a pattern for monitoring the system’s environment for adverse events, a pattern for actuator control and a data-processing pattern. Designers of real-time systems have to do a timing analysis, which is driven by the deadlines for processin...

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The service engineering process involves identifying candidate services for implementation, defining the service interface and implementing, testing and deploying the service. Service interfaces may be defined for legacy software systems which may then be reused in other applications. Software development using services involves creating programs...

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Architectural patterns for distributed systems include master-slave architectures, two-tier and multi-tier client-server architectures, distributed component architectures and peer-to-peer architectures. Distributed component systems require middleware to handle component communications and to allow components to be added to and removed from the s...

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During the CBSE process, the processes of requirements engineering and system design are interleaved. Component composition is the process of ‘wiring’ components together to create a system. When composing reusable components, you normally have to write adaptors to reconcile different component interfaces. When choosing compositions, you have to...

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Software product lines are related applications that are developed from a common base. This generic system is adapted to meet specific requirements for functionality, target platform or operational configuration. COTS product reuse is concerned with the reuse of large-scale, off-the-shelf systems. These provide a lot of functionality and their reu...

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ejbPassivate(): When the bean is being sent into the instance pool, this method is called. Enterprise beans have a context object that identifies the bean’s environment. These context objects are accessible to the beans in order to retrieve transaction and security information.

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Safety and dependability cases collect all of the evidence that demonstrates a system is safe and dependable. Safety cases are required when an external regulator must certify the system before it is used. Safety cases are usually based on structured arguments. Structured safety arguments show that an identified hazardous condition can never occur...

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This ejb-jar.xml file has to be present in the directory called META-INF. A jar file is created in order to package the three files, namely, the remote interface, the bean class, and the home interface. To deploy the bean, the newly created .jar file has to be copied into the deploy directory on the server. If the business process requires mult...

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General security guidelines sensitize designers to security issues and serve as review checklists Configuration visualization, setting localization, and minimization of default privileges help reduce deployment errors System survivability reflects the ability of a system to deliver services whilst under attack or after part of the system has been...

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