EarlGray: A Component-Based Java Virtual Machine for Embedded Systems

EarlGray is a component-based Java virtual machine (JVM) that can be configured to satisfy various kinds of require-ments for building future information appliances and em-bedded systems. While the modification and extension on an existing JVM tend to be done in an ad-hoc manner, Earl-Gray allows developers to customize the JVM in a system-atic manner by decomposing it into components and the explicit descriptions of the relationship between the com-ponents. We also examine three case studies on the cus-tomization of the EarlGray: exchanging a scheduler, mem-ory management, and class file verifier components. These case studies shows the benefits and drawbacks of the current component-based technologies. 1