From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII X-Google-Thread: 103376,5a034c59539ea9d3,start X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-11-26 08:43:15 PST Path: archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed.stueberl.de!teaser.fr!enst.fr!not-for-mail From: Laurent Pautet Newsgroups: comp.lang.ada Subject: [ANNOUNCE] Release of PolyORB 1.0p Date: 26 Nov 2003 17:41:18 +0100 Organization: ENST, France Sender: pautet@antigone.enst.fr Message-ID: NNTP-Posting-Host: antigone.enst.fr Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: avanie.enst.fr 1069864880 3272 137.194.162.28 (26 Nov 2003 16:41:20 GMT) X-Complaints-To: usenet@enst.fr NNTP-Posting-Date: Wed, 26 Nov 2003 16:41:20 +0000 (UTC) User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Cuyahoga Valley) Xref: archiver1.google.com comp.lang.ada:2967 Date: 2003-11-26T17:41:18+01:00 List-Id: Announcing the release of PolyORB 1.0p ====================================== Ada Core Technologies, ACT Europe, and the PolyORB team are proud to announce the first public release of PolyORB: PolyORB 1.0p (http://libre.act-europe.fr/polyorb/). This release contains a CORBA-compliant instantiation of the PolyORB generic middleware. It includes: * an IDL to Ada 95 compiler, * implementations of the Portable Object Adapter (POA), Dynamic Skeleton Interface (DSI), Dynamic Invocation Interface (DII), and Interface Repository (IR), * implementations of the COS Naming, COS Event and COS Time services, * implementations of GIOP 1.0, 1.1, and 1.2. This CORBA implementation can be configured for full tasking, Ravenscar tasking or no tasking runtime, depending on the level of desired functionality for the application, and on the resource constraints for the target. This release should be considered as a stable implementation of CORBA middleware over PolyORB. Other instanciations of PolyORB are available in the public PolyORB CVS repository for testing purposes. They will be included in future releases. PolyORB is primarily developed by J�r�me Hugues, Thomas Vergnaud, and Laurent Pautet (T�l�com Paris), and Thomas Quinot (ACT Europe). Fabrice Kordon (LIP6) also participates in the project. ---------------------------------------------------------------------- POLYORB Distributed applications and middleware --------------------------------------- PolyORB aims at providing a uniform solution to build distributed applications; relying either on industrial-strength middleware standards such as CORBA, the Distributed System Annex of Ada 95, distribution programming paradigms such as Web Services, Message Oriented Middleware (MOM), or to implement application-specific middleware. Middleware provides a framework that hides the complex issues of distribution, and offers the programmer high-level abstractions that allow easy and transparent construction of distributed applications. A number of different standards exist for creating object-oriented distributed applications. These standards define two subsystems that enable interaction between application partitions: * the API seen by the developer's applicative objects; * the protocol used by the middleware environment to interact with other nodes in the distributed application. Middleware implementations also offer programming guidelines as well as development tools to ease the construction of large heterogeneous distributed systems. Many issues typical to distributed programming may still arise: application architectural choice, configuration or deployment. Since there is no "one size fits all" architecture, choosing the adequate distribution middleware in its most appropriate configuration is a key design point that dramatically impacts the design and performance of an application. Consequently, applications need to rapidly tailor middleware to the specific distribution model they require. A distribution model is defined by the combination of distribution mechanisms made available to the application. Common examples of such mechanisms are Remote Procedure Call (RPC), Distributed Objects or Message Passing. A distribution infrastructure or middleware refers to software that supports one (or several) distribution model, e.g.: OMG CORBA, Java Remote Method Invocation (RMI), the Distributed System Annex of Ada 95, Java Message Service (MOM). PolyORB: a generic middleware with an instance per distribution model --------------------------------------------------------------------- Typical middleware implementations for one platform support only one set of such interfaces, pre-defined configuration capabilities and cannot interoperate with other platforms. In addition to traditional middleware implementations, PolyORB proposes an original architecture to enable support for multiple interoperating distribution models in a uniform canvas. PolyORB is a polymorphic, reusable infrastructure for building or prototyping new middleware adapted to specific application needs. It provides a set of components on top of which various instances can be elaborated. These instances (or personalities) are views on PolyORB facilities that are compliant to existing standards, either at the API level (application personality) or at the protocol level (protocol personality). These personalities are mutually exclusive views of the same architecture. The decoupling of application and protocol personalities, and the support for multiple simultaneous personalities within the same running middleware, are key features required for the construction of interoperable distributed applications. This allows PolyORB to communicate with middleware that implement different distribution standards: PolyORB provides middleware-to-middleware interoperability (M2M). PolyORB's modularity allows for easy extension and replacement of its core and personality components, in order to meet specific requirements. In this way, standard or application-specific personalities can be created in a streamlined process, from early stage prototyping to full-featured implementation. The PolyORB architecture also allows the automatic, just-in-time creation of proxies between incompatible environments. PolyORB currently supports the following personalities (in the main development branch, available through CVS access): * application personalities: CORBA, Distributed System Annex of Ada 95 (DSA), MOMA - MOM for Ada. Interaction between CORBA and DSA partitions has been successfully tested; * protocol personalities: SOAP, GIOP (CORBA generic protocol layer) and the folowing instanciations: IIOP (over TCP/IP), DIOP (over UDP/IP for oneway requests), and MIOP/UIPMC (group communication over multicast/IP) * under development: Web Services personality, an adaptation of the AWS API to PolyORB. Note: PolyORB is the project formerly known as DROOPI, a Distributed Reusable Object-Oriented Polymorphic Infrastructure. -- -- Laurent