The paper presents an extension for the JavaBeans component model that enables creating composed components dynamically, at runtime, without code generation. The composed components created can be used immediately for instantiation having their instances used for execution or for further components composition. The dynamic abilities are supported by extended type implementation based on additional superstructure provided with its Java API implementation and corresponding JavaBeans components. Using the component model and base components it provides, the new component composition is performed by building the composed prototype object that can be dynamically transformed into the new composed instantiable type. The component model can be used when implementing user defined types in declarative languages for event-driven models description.
This chapter explores the nature of the 2008 crisis and the channels through which it affected the performance of Russian firms. Based on the findings of manufacturing industry survey, the evidence suggests that all manufacturing firms were affected by the crisis and there is no single and dominant transmission channel. Crisis reactions were significantly related to participation in international markets, although participation in trade, external borrowing or FDI can not explain recession by themselves. The reversal of growth was mainly caused by demand shock, and following that, by financial constraints. Thus hypothesis that blames overheating of internal demand in the years prior to the crisis seems to receive statistical backing. Globalised companies, thogh hit by external shocks, were better prepared to pay the cost and balance the consequences of the crisis.
We introduce the active XML database architecture to build very large, scalable, loosely structured distributed data storage. Traditionally data is regarded as passive records operated by DBMS software. Our idea is that every data unit is active, capable of communication with other data units and database clients. Combined with the special overlay structure incrementally formed by data units (Metrized Small World Graph) this provides for effective distribution of data units among database servers and unbounded scalability of the resulting storage ensuring logarithmic search and append complexity. Each active data unit is represented as an XML document addressable by a unique URL having a locally stored extendable set of XLink links to other data units, and a software module driving the communication with other data units and clients. Search in this structure is performed by sequential and/or parallel crawling following the links in the list obtained on each step. The active data units communicate by sending XML messages over a transport protocol such as HTTP. The communication includes the retrieval of XML content and link lists, addition of new links, calculating query relevance and work delegation (so that every unit can actively propagate the process initiated or mediated by another unit). Since there are no central controlling nodes in the structure, multiple processes of adding new data units and searching for existing data can be performed independently and simultaneously, and begin with any existing data unit. Moreover, because the data units are active, these processes may propagate on they own without being fully dictated by originator. This allows the distribution of data processing along with the distribution of data itself. We have built a prototype implementation of the architecture. The analysis of the small world overlay structure properties confirmed the possibility of building efficient XML data storages which contain hundreds of petabytes of data.