This paper presents a portable framework to profile memory allocation in standard Java Virtual Machines. We extended our exact profiler JP, which generates a method call tree (MCT) for each thread in the system, in order to store information concerning object allocation in the MCT. Our primary design goals were to use platform-independent metrics for memory allocation and to minimize the extra ...

This paper describes an algorithm optimizing the discovery process for composed semantic web services. The algorithm can be used to improve discovery of appropriate component services at invocation time. It performs semantic matchmaking of goals of a composed service to appropriate component services at publishing time. The semantic discovery problem at invocation time is therefore reduced to a...

This paper presents COMET, a Common Object Management EnvironmenT, that investigates basic problems associated with distributed computing in an internet environment with mobile objects. COMET offers a uniform invocation model, based on dialogues, that integrates both communication and execution aspects. On the communication side, dialogues support asynchronous invocation with preservation of ca...

We present a generalization of Java’s Remote Method Invocation model (RMI) providing an efficient group communication mechanism for parallel programming. Our Group Method Invocation model (GMI) allows methods to be invoked either on a single object or on a group of objects, the latter possibly with personalized parameters. Likewise, result values and exceptions can be returned normally (as with...

Remote Method Invocation (RMI), a mechanism to access remote objects in Java-based distributed applications, uses network communication for each method invocation. Consequently, using RMI in a wide-area environment can cause poor application performance. One solution to improve performance is to cache the objects such that network communication is not necessary for each method invocation. In th...

Recent service management needs, e.g., in the cloud, require services to be managed dynamically. Services might need to be selected or replaced at runtime. For services with similar functionality, one approach is to identify the most suitable services for a user based on an evaluation of the quality (QoS) of these services. In environments like the cloud, further personalisation is also paramou...

Application-level message passing is supported by many concurrent programming languages. Such languages allow messages to be generated by invoking an entry. Messages are removed from an entry by an invocation selection mechanism. Such mechanisms may allow selection from a set of entries (multi-way receive). Many concurrent languages provide support for multi-way receives, but they are limited i...