Demonstrations

Velare Technologies, Inc. will demonstrate ATCT (Asynchronous Transfer of Control Threading) – a Java framework for asynchronous method invocation. ATCT facilitates development of asynchronous long-running processes in Java, using well-known OOP techniques and design patterns. Traditionally when an application interacts asynchronously with an external environment, event-driven programming is used. However, this approach makes it difficult to develop processes with complex flow logic. Moreover, programming of sophisticated workflow patterns becomes almost impossible. ATCT allows transforming the event-driven programming style into a well-known sequential programming style, enabling the use of OOP for asynchronous process development. In addition, it is possible to develop a variety of new types of applications that require manipulation of execution context. ATCT introduces a new approach for execution context reification in Virtual Machine based runtime environments. ATCT uses a secondary bytecode interpreter to execute specially marked methods in a special mode, which allows to access execution context as first class object. The secondary interpreter is written in the Java programming language allowing use of ATCT on any JVM. ATCT’s functionality and capabilities will be presented by using slides and code samples. After introducing the concept using simple examples, we will show the possibilities for complex distributed architectures by showing prototypes of frameworks for messaging and web applications. Our demonstration is targeted to people who are interested in the use of VM-oriented mainstream OO languages such as Java or C#, for new types of applications. The demonstration should also be interesting for designers of Virtual Machines and new languages.