600 results about "Java virtual machine" patented technology

Interactive electronic book operating systems and methods for displaying and allowing customization of content of scientific, engineering and other technical and professional digital books. The systems and methods allow for a single screen for displaying digital books covering scientific and technical topics having a classical look and feel on operating platforms(such as portable laptops, desktops, and small handheld displays) that are capable of running the Java Virtual Machine. The display screen can include icon toolbars about the screen and/or directly on the screen to manipulate the pages and content of the digital book. The icons can allow for forward and backward page turning, generating of dynamic indexing and tables of contents, bookmarking, color themes, floating pages, highlighting, adding sticky notes, hiding selected content on the pages, quizzing the reader, lecturing the reader, tutoring the reader, showing the reader additional designs and practical relevance, and allowing the instructor to generate uniform seed numbers for problems and designs and/or allowing the instructor to generate random seed values for problems and designs.

The invention provides improved methods and apparatus for control using field and control devices that provide a virtual machine environment and that communicate via an IP network. By way of non-limiting example, such field device can be an “intelligent” transmitter or actuator that includes a low power processor, along with a random access memory, a read-only memory, FlashRAM, and a sensor interface. The processor can execute a real-time operating system, as well as a Java virtual machine (JVM). Java byte code executes in the JVM to configure the field device to perform typical process control functions, e.g., for proportional integral derivative (PID) control and signal conditioning. Control networks can include a plurality of such field and control devices interconnected by an IP network, such as an Ethernet.

The invention relates to an M2M (machine-to-machine) module and to a method of configuring parameters of an M2M module, the method comprising establishing a connection between the M2M module and a server. The method comprises: downloading, to the M2M module, an application having an application programming interface (API) for configuring the M2M module, the application being configured to run on a Java virtual machine (JVM); communicating with the server by the application for receiving configuration parameters; and setting the parameters of the M2M module by the application based on the received configuration parameters.

A digital rights management system for controlling the distribution of digital content to player applications. The system comprises a verification system, a trusted content handler, and a user interface control. The verification system is provided to validate the integrity of the player applications; and the trusted content handler is used to decrypt content and to transmit the decrypted content to the player applications, and to enforce usage rights associated with the content. The user interface control module is provided to ensure that users of the player applications are not exposed to actions that violate the usage rights. The preferred embodiment of the present invention provides a system that enables existing content viewers, such as Web browsers, document viewers, and Java Virtual Machines running content-viewing applications, with digital rights management capabilities, in a manner that is transparent to the viewer. Extending content viewers with such capabilities enables and facilitates the free exchange of digital content over open networks, such as the Internet, while protecting the rights of content owners, authors, and distributors. This protection is achieved by controlling access to the content and constraining it according to the rights and privileges granted to the user during the content acquisition phase.

A computer-implemented method in which report program language is converted to object-oriented source code, such as Java, using the report program language compiler. The object-oriented source code emulates the behaviour of the report program language, such as VARPG. Applications written in RPG are converted to Java and therefore can run on every platform for which a Java virtual machine exists. RPG programmers now have the ability to write internet applications. Java applications and applets can be written in RPG and existing RPG applications can be converted to Java applets.

This invention describes a method and several variants for compiling programs or components of programs in a mixed static and dynamic environment, so as to reduce the amount of time and memory spent in run-time compilation, or to exercise greater control over testing of the executable code for the program, or both. The invention involves generating persistent code images prior to program execution based on static compilation or dynamic compilation from a previous run, and then, adapting those images during program execution. We describe a method for generating auxiliary information in addition to the executable code that is recorded in the persistent code image. Further, we describe a method for checking the validity of those code images, adapting those images to the new execution context, and generating new executable code to respond to dynamic events, during program execution. Our method allows global interprocedural optimizations to be performed on the program, even if the programming language supports, or requires, dynamic binding. Variants of the method show how one or several of the features of the method may be performed. The invention is particularly useful in the context of implementing Java Virtual Machines, although it can also be used in implementing other programming languages.

Invention manages underlying application objects that support implemented business functions. A performance manager accesses and interprets application metadata and execution environment metadata, using a hierarchical entity to model complex relationships between application abstractions, components and resources. The performance manager encodes common behavioral and architecture information in models resulting from analysis of component architecture standards, vendor application servers, development tools and administration tools. The performance manager conducts inter-component dependency and control flow analysis, for example by generating control flow graphs from application metadata and performing byte code analysis without access to application source code. The performance manager collects metrics from standardized and vendor-specific sources, instruments interpreters (such as the Java Virtual Machine), and collects and utilizes resource metrics, code performance metrics, configuration parameters, and transaction, failure and lifecycle events.

A system and method to monitor worker threads within a Java virtual machine. At least one program is executed on the Java virtual machine to perform a task. A worker thread of the Java virtual machine is assigned to perform the task. Status information for the worker thread is generated and reported into memory external to the Java virtual machine to enable monitoring of the worker thread from external to the Java virtual machine.

A digital rights management (DRM) system and methodology for a Java client implementing a Java Runtime Environment (JRE). The JRE comprises a Java Virtual Machine (JVM) and Java runtime libraries components and is capable of executing a player application for presenting content that can be presented through a Java program (e.g., a Java application, applet, servlet, bean, etc.) and downloaded from a content server to the client. The DRM system includes an acquisition component for receiving downloaded protected contents; and a dynamic rights management layer located between the JRE and player application for receiving requests to view or play downloaded protected contents from the player, and, in response to each request, determining the rights associated with protected content and enabling viewing or playing of the protected contents via the player application if permitted according to the rights. By providing a Ad DRM-enabled Java runtime, which does not affect the way non-DRM-related programs work, DRM content providers will not require the installation of customized players. By securing the runtime, every Java™ player automatically and transparently becomes a DRM-enabled player.

A system is provided which comprises multiple Java virtual machines (VMs). Each VM is capable of running a plurality of threads. The system includes at least one object which is shared between the VMs so that it is accessible from two or more VMs, and at least one non-shared object which is accessible only from a single VM. In order to perform a lock operation on a shared object, it is first detecting that an object is a shared object. In a preferred embodiment, this is accomplished by locating a predefined value in a particular lock data word in the object. In response to the detection, a monitor is used to control local access to the shared object for the thread that is requesting the object. The monitor is on the same VM as the requesting thread. In addition, a data structure, which may be a proxy object, is updated in order to associate the monitor with the shared object.

A system and method for use with a virtual machine, including an adaptive, automated memory management process that takes decisions regarding which garbage collector technique should be used, based on information extracted from the currently active applications. Reinforcement learning is used to decide under which circumstances to invoke the garbage collecting processing. The learning task is specified by rewards and penalties that indirectly tell the RLS agent what it is supposed to do instead of telling it how to accomplish the task. The decision is based on information about the memory allocation behavior of currently running applications. Embodiments of the system can be applied to the task of intelligent memory management in virtual machines, such as the Java Virtual Machine (JVM).

The present invention teaches a variety of systems, platforms, applications, and methods, and relates to mobile platforms, embedded native applications, Java virtual machines, user interfaces, and the like. The present invention discloses a mobile platform which unifies the worlds of the Java virtual machine and native applications to provide a unified and consistent environment for multitasking both Java and native applications within a mobile device.

A method and system for monitoring performance of a program using global metric variables to provide the support in an symmetric multiprocessor (SMP) system. A Java virtual machine (Jvm) either calls the profiler whenever bytes are allocated or provides an interface to allow the profiler to determine the value of the change in the metric for the current thread. The profiler then applies the changes to a metric for the current thread. Alternatively, per processor data areas are maintained for storing per processor metric values. Whenever a thread switch occurs or there is a request for the metric on a specified thread, an operating system kernel updates the thread level metric values with changes in the values per processor metrics.

A trusted Java virtual machine provides a method for supporting tamper-resistant applications, ensuring the integrity of an application and its secrets such as keys. The trusted Java virtual machine verifies the integrity of the Java application, prevents debugging of the Java application, and allows the Java application to securely store and retrieve secrets. The trusted Java virtual machine environment comprises a TrustedDictionary, a TrustedBundle, an optional encryption method for encrypting and decrypting byte codes, and an underlying trusted Java virtual machine. The encrypted TrustedDictionary protects data while the TrustedBundle protects programming code, allowing applications to store secret data and secure counters. The application designer can restrict TrustedBundle access to only those interfaces that the application designer explicitly exports. The open source code may optionally be encrypted. Secrets required by the open source programming code of the application are encrypted in TrustedDictionary.

Techniques for analyzing software in which un-instrumented components can be discovered and conditionally instrumented during a runtime of the software. Initially, software such as an application can be configured with a baseline set of instrumented components such as methods. As the application runs, performance data gathered from the instrumentation may indicate that the performance of some methods is below expectations. To analyze this, any methods which are callable from a method at issue are discovered, such as by inspecting the byte code of loaded classes in a JAVA Virtual Machine (JVM). To limit and focus the diagnosis, the instrumentation which is added to the discovered components can be conditional, so that the instrumentation is executed only in a specified context. The context can involve, e.g., a specified sequence of components in which a discovered component is called, and/or transaction data in which a discovered component is called.

The present invention allows construction of a secure, real-time operating system from a portable language such as Java that appears to be a Java virtual machine from a top perspective but provides a secure operating system from a bottom perspective. This allows portable languages, such as Java, to be used for secure embedded multiprocessor environments.

A visual editor is automatically generated from an eXtensible Markup Language (XML) schema and then used to edit the data contained in corresponding XML documents. The entities within an XML schema are mapped to components of the visual editor, such as forms, widgets, etc., that are generated as class specifications. These class specifications can be customized through the use of a customization specification file, as desired. The class specifications are then instantiated as objects in a Java Virtual Machine to perform the functions of the visual editor.

Measurement/analysis unit in a Java virtual machine has the function of measuring data when an event of garbage collection occurs, and the function of periodically measuring data. The measurement/analysis unit analyzes the measured data and predicts a danger of a memory shortage, and predicts a danger using an algorithm depending on the type of garbage collection used by the Java virtual machine. An application server is notified of a warning of the predicted danger of a memory shortage by an analysis result notification means by an inter-process communication, or the like. The measurement/analysis unit calculates a memory capacity required to avoid the predicted danger of a memory shortage, and the calculated memory capacity is transmitted to the application server by the analysis result notification means by an inter-process communication, or the like in the same way as the warning.