By Jörg Kienzle
This publication investigates how transactions might be built-in with concurrent object-oriented programming, and the way transactions will be made to be had to an program programmer on the programming language point.
The booklet offers an in depth evaluation of present transaction versions, and analyzes their suitability for concurrent programming languages. a brand new transaction version named "Open Multithreaded Transactions" is gifted. It presents beneficial properties for controlling and structuring not just entry to things, as ordinary in transaction structures, but additionally threads enjoying transactions. Integration with exception dealing with makes open multithreaded transactions excellent construction blocks for fault-tolerant purposes.
The publication additionally describes the layout of an object-oriented framework offering the required run-time aid for open multithreaded transactions. Procedural, object-oriented and aspect-oriented interfaces for the applying programmer are offered. Programming examples contain code in Ada, Java and AspectJ.
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Additional resources for Open Multithreaded Transactions: A Transaction Model for Concurrent Object-Oriented Programming
Loading and saving of values does not alter their semantics, and the process is Fundamental Concepts 25 transparent to the application program . Whether or not data should be made persistent is often determined using a technique called persistence by reachability. The persistence support designates an object as a persistent root and provides applications with a built-in function for locating it. Any object that is "reachable" from the persistent root, for instance by following pointers, is automatically made persistent.
3 Direct Communication An active object can communicate with another active object by direct1y invoking its interface methods. This interaction is viewed as a dient / server 14 Open Multithreaded Transactions model relationship. 2. I Client Object I IServer Object I ! Client Object I IServer Object I Operation .. 2 Synchronous vs. Asynchronous Communication When using synchronous communication, the client waits for the method invocation on the server side to complete before continuing its execution.
The semantics of the message will remain the same across many similar c1asses. In object-oriented programming languages, polymorphism is reftected in the ability of variables to dynamically denote objects belonging to different c1asses of a given hierarchy. 9 Interactions Object-oriented programming is a method of implementation in which programs are organized as cooperating collections of objects. To achieve this collaboration, objects may invoke operations on other objects. The result are so-called dient / server relationships.
Open Multithreaded Transactions: A Transaction Model for Concurrent Object-Oriented Programming by Jörg Kienzle