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Entry Service (ES) 3.1 is a software library for Java developers. It provides centralized access to distributed data though a single hierarchy of typed objects (entries). Entries can be stored in data sources of different types (XML files, RDBMS, etc.). Every data source is to be overbuilt with one entry service; services group together into one distributed hierarchy. Every service publishes its own part of a global entry (object) tree. The whole entry tree is accessible through any service running, through one program interface, in spite of where and how the objects are stored in fact. All the services provide the same view of data transparently.
Entries have stable and unique string identifier to refer from anywhere; the identifier reveals entry nesting structure. Entry nesting and service hierarchy are independent one from another, so entries can be moved into another service without changing their identifiers. ES-Path (XQuery/XPath-like language) exists to query the entry tree.
Distributed Refreshable Objects underlies this library, which adds more flexibility and efficiency to ES: a bunch of remote calls are collected and sent as one package through network; all remote entries are cached on client side with no stale data possible; subscription on entry changes is possible. All this is done with no any messaging server (peer-to-peer communication takes place), which gives very high scalability of the entry tree and possibility to use it in global scope.
The key features are:
- Single view of typed objects covering all data sources involved of any types (RDBMS, XML, etc.).
- Stable string object identifier to refer from anywhere; back reference navigation is supported;
- XQuery/XPath-like ES-Path language to query the whole tree.
- Remote entries are cached locally; no stale data is possible.
- No central messaging server needed to notify of changes; increased scalability.
- Effective network data interchange
Tags: entry, service, application, distributed, system, data, global, object, tree, technologies, entry service, application distributed, distributed system, data distributed, global object service, global tree technologies, …

Oracle Data Access Components (ODAC) is a VCL/VCL.NET/CLX component library for fast direct access to Oracle from Delphi, C++Builder, and Kylix. ODAC is heavily performance- and stress-tested to provide the fastest available native connectivity to Oracle. ODAC features advanced local data handling and comprehensive Oracle functionality coverage, including Oracle Advanced Queuing, Oracle TAF, and distributed transaction support.

ODAC is easy to use in both new and existing applications. It is a complete replacement for standard Oracle connectivity solutions and integrates well with third-party libraries and Core Lab database development tools. Comes with full documentation and a large set of demo projects.

Key Features

- Direct access to server data. Does not require installation of other data provider layers (such as BDE and ODBC)
- In Direct mode does not require Oracle client software and works directly through TCP/IP
- Full support of the latest versions of Oracle and support for all Oracle data types
- Disconnected Model for working with data offline
- Local Failover for detecting connection loss
- Oracle Transparent Application Failover(TAF) support
- Oracle Advanced Queuing support
- Oracle alerts and pipes support
- Oracle direct path interface support
- Distributed transaction support
- Unicode and national charsets support
- Integration with OraDeveloper Tools for performing advanced database development and administration tasks
- Easy migration from BDE with Migration Wizard

Versions of ODAC are available for CodeGear Delphi 2007 for Win32, Borland Development Studio 2006, Delphi 2005, Turbo Delphi, Turbo Delphi for .NET, Turbo C++, Delphi 5,6,7,8 C++Builder 5,6, and Kylix 2,3. ODAC supports Oracle server versions 7.3 and higher.
Tags: odac, oracle, dac, vcl, clx, net, delphi, bds, core, lab, data, access, components, bde, c++builder, kylix, turbo, c++, replacement, core lab, data access components, …