Early Experiences with Persistent

This paper reports on initial experiences with an orthogonally persistent variant of the Java platform, called Persistent Java (PJava). We review and reflect on the design of PJava and discuss compatibility with Java. The features and limitations of an initial prototype are discussed. The experiences gained in running four distinct applications on PJava are described in detail. 1 Introduction Persistent Java (PJava) [1], [2] is an experimental persistent programming environment for the Java programming language. PJava provides orthogonal persistence [3], an approach that provides equal rights to persistence for all data types with the absolute minimum of additional programming effort. PJava attempts to support a wide range of applications, ranging from simple, almost completely transparent, uses of persistence to sophisticated applications that require extensible transaction models. A major goal of PJava is for arbitrary Java code to participate unchanged in PJava applications. We rep..