Oracle International Corporation

Jiangli Zhou

Ioi Kim Lam

Karen Margaret Pearson Kinnear

Calvin C Cheung

Christopher Jordan Plummer

Dean Roy Ernest Long

Returning a runtime type loaded from an archive in a module system is disclosed. Operations include (a) identifying, by a class loader implemented in a runtime environment, an archived runtime type loaded into an archive from a module source; (b) identifying a particular package associated with the archived runtime type; (c) determining that the particular package is defined to a runtime module that is defined to (i) the class loader or (ii) any class loader in the class loader hierarchy to which the class loader delegates; and (d) returning directly or indirectly, by the class loader, a runtime type loaded based on the archived runtime type from the archive.

Returning a runtime type loaded from an archive in a module system

A class preloading mechanism that dynamically preloads classes at runtime in a virtual machine (VM) environment. Data structures representing preloaded classes may be stored in a persistent module corresponding to a classloader. A persistent module can be directly mapped or copied into a memory region at runtime so that the classes may not have to be loaded from the class file container. The preloaded classes are not fully linked and resolved. When a classloader receives a class request, the classloader looks up the preloaded class in the memory region and completes linking and resolution of the class. Persistent modules may be pre-generated and, for example, installed with an application. Alternatively, a persistent module for a class file container may be generated at runtime by preloading classes from the class file container into a memory region and storing data structures representing the classes as a persistent module.

Methods and apparatus for dynamically preloading classes

The present disclosure involves systems, methods, and/or computer-readable mediums for reducing load time of an application. The systems, methods, and/or computer-readable mediums store metadata in an archive prior to execution of an application. The metadata corresponds to a type of class loading operation used to load a class required by the application, where different types of class loading operations perform different security checks as a part of loading classes. During execution of the application, based on the metadata and based in part on a request for the class loading operation to load the class, it is determined whether the class is stored in the archive. When the class is stored in the archive, a particular type of class loading operation loads the class from the archive and the system checks that the particular type of the class loading operation matches the type of the class loading operation in the metadata.

Growing community of inventors

San Ramon, CA, United States of America

Jiangli Zhou