GLADE: a framework for building large object-oriented real-time distributed systems

Pautet, Laurent; Tardieu, Samuel

doi:10.1109/isorc.2000.839536

Cited by 21 publications

(18 citation statements)

References 12 publications

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“…This kind of connectors are suitable for connections with real-time requirements. An alternate implementation with no prioritized messages has been made using GLADE [9], an implementation of the Ada Distributed Systems Annex (DSA).…”

Section: Component Architecturementioning

confidence: 99%

Ada-CCM: Component-Based Technology for Distributed Real-Time Systems

Martínez

Drake

Pacheco

et al. 2008

Component-Based Software Engineering

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This paper proposes a technology for the development of distributed real-time component-based applications, which takes advantage of the features that Ada offers for the development of applications with predictable temporal behaviour, and which can be executed in embedded platforms with limited resources. The technology uses the Deployment and Configuration of Component-based Distributed Applications Specification of the OMG for describing the components, the execution platforms and the applications. The framework defined in the Lightweight CCM standard of the OMG is taken as the basis of the internal architecture of the components and the applications. It has been extended with a number of features to make the temporal behaviour of the applications predictable. Among these extensions, the usage of CORBA has been replaced by special distributed components, called connectors, which implement the interaction between components by means of predictable and customizable communication services. Besides, special mechanisms have been introduced in the environment to make the threading characteristics of the components configurable. The technology fixes the responsibilities and the knowledge required by each actor involved in the component-based development process, and for each of them it defines the input and output artifacts that they have to manage.

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Section: Component Architecturementioning

confidence: 99%

Ada-CCM: Component-Based Technology for Distributed Real-Time Systems

Martínez

Drake

Pacheco

et al. 2008

Component-Based Software Engineering

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“…To allow a flexible use of the transactional model we proposed in [5] a modification of the GLADE [11] implementation of Ada's DSA, called RT-GLADE, in which the application developer was able to assign all the priorities involved in an RPC: the priority of the client task, the priorities of the query and reply messages, and the priority of the RPC handler in the server side. As it can be seen in Fig.…”

Section: Fig 1 Model Of a Transactionmentioning

confidence: 99%

Interchangeable Scheduling Policies in Real-Time Middleware for Distribution

Campos

Gutiérrez

Harbour

2006

Reliable Software Technologies – Ada-Europe 2006

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Abstract. When a middleware layer is designed for providing semi-transparent distribution facilities to real-time applications, a trade-off must be made between the expressiveness and control capabilities of the real-time parameters used, and the simplicity of usage. Middleware specifications such as RT-CORBA or Ada's Distributed Systems Annex (DSA) rely on the use of priorities to map the timing requirements of the application, thus restricting the possible scheduling policies. This paper presents a generic technique to express complex scheduling and timing parameters of distributed transactions, allowing real-time middleware implementations to change their scheduling policies for both the processing nodes and the networks. The technique has been tested in an implementation of Ada's DSA, providing two interchangeable policies: a fixed-priority scheduler, and a complex contract-based flexible scheduler.

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“…The construction of the connectors for the communication between remote components, was made using the native Ada Distributed System Annex (DSA), Annex E of the Ada specification. The implementation of DSA used was GLADE [21]. Distributed test applications were developed and executed successfully.…”

Section: Practical Experiencementioning

confidence: 99%

An Ada 2005 Technology for Distributed and Real-Time Component-Based Applications

Martínez

Drake

Pacheco

et al.

Reliable Software Technologies – Ada-Europe 2008

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Abstract:The concept of interface in Ada 2005 significantly facilitates its usage as the basis for a software components technology. This technology, taking benefit of the resources that Ada offers for real-time systems development, would be suitable for component-based real-time applications that run on embedded platforms with limited resources. This paper proposes a model based technology for the implementation of distributed real-time component-based applications with Ada 2005. The proposed technology uses the specification of components and the framework defined in the LwCCM standard, modifying it with some key features that make the temporal behaviour of the applications executed on it, predictable, and analysable with schedulability analysis tools. Among these features, the dependency on CORBA is replaced by specialized communication components called connectors, the threads required by the components are created and managed by the environment, and interception mechanisms are placed to control their scheduling parameters in a per-transaction basis. This effort aims to lead to a new IDL to Ada mapping, a prospective standard of the OMG.

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GLADE: a framework for building large object-oriented real-time distributed systems

Cited by 21 publications

References 12 publications

Ada-CCM: Component-Based Technology for Distributed Real-Time Systems

Ada-CCM: Component-Based Technology for Distributed Real-Time Systems

Interchangeable Scheduling Policies in Real-Time Middleware for Distribution

An Ada 2005 Technology for Distributed and Real-Time Component-Based Applications

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