This article analyses two most commonly used distributed models in Java: Web services and RMI (Remote Method Invocation). The paper focuses on regular (unsecured) as well as on secured variants, WS-Security and RMI–SSL. The most important functional differences are identified and the performance on two operating systems (Windows and Linux) is compared. Sources of performance differences related...

CentiJ is a software synthesis system that, until recently, used synchronous, semiautomatic static proxy delegation to help in the automation of the creation of distributed Java programs on NOWS (Networks of Workstations). This paper reports our recent extension to CentiJ so that invocations are asynchronous. Further, we have achieved transparency with respect to local vs. non-local asynchronou...

When developing applications using distributed objects, Java developers have to make the choice which distributed object model to use. They can choose among the Remote Method Invocation (RMI) bounded with Java from version 1.1, or, they can use one of the several CORBA implementations. In version 2 Java has been supplemented with a native CORBA implementation known as Java IDL. Lately, even the...

Remote method invocation (RMI), which is an action of invoking a method on a remote object, is widely accepted abstraction for communicating and sharing objects among distributed sites. Ideally, the parameter-passing semantics of RMI should be as close as possible to that of local method invocation. However, in distributed environments, adherence to local parameter-passing model prevents contro...

This paper describes an implementation of Java's Remote Method Invocation (RMI) that is designed to run on top of the Globus high performance computing protocol. The primary contribution of this work is to illustrate how the object serialization mechanism used by RMI can be extended so that it becomes more con gurable. This allows the implementation of object serialization protocols that are mo...

We further increase the efficiency of Java RMI programs. Where other optimizing re-implementations of RMI use pre-processors to create stubs and skeletons and to create class specific serializers and deserializers, this paper demonstrates that with transformations based on compile time analysis an additional 18% performance gain can be achieved over class specific serializers alone for a simple...

Ocular inflammation was induced in 36 dogs by performing an anterior capsulotomy with a Nd:YAG laser. All dogs were pretreated with topical atropine. Dogs were then divided into three groups: (1) control, with no other pretreatment; (2) pretreatment with the topical dual cyclooxygenase/lipoxygenase inhibitor RMI-1068; and (3) pretreatment with topical prednisolone acetate. Dogs were studied 1-3...

Most Public Private Partnership (PPP) infrastructure projects especially in emerging markets carry a high amount of economic foreign exchange (FX) exposure. Risk mitigation instruments (RMI) are frequently implemented by governments to compensate FX loss in the Special Purpose Company (SPC). The experience of many investors is an underestimation of the risk that governments would refuse to read...

Accurate, efficient and predictable performance assessment of distributed object models is necessary to make a founded decision about which model to use in a given application domain. This article presents a performance assessment framework for distributed object models. It presents two contributions to the study of distributed object performances: it defines the performance criteria for all im...

This paper is focused on the performance analysis, comparison and optimization of distributed object middleware for Java 2: RMI (Remote Method Invocation), CORBA IDL (Interface Definition Language) and RMI-IIOP (Remote Method Invocation on Internet Inter-ORB Protocol). The paper presents the following contributions to the research on distributed object performance. First, a detailed performance...