Package edu.utah.janosvm.resources

Resources managed by the JanosVM on a per-team basis.

See:
Description

Class Summary

ClassPathResource	Provides access methods to the current team's class path.
ClassPathSpec	Specification for the class path resource.
ConfigSpec
CPUResource	Provides java level access to the current team's CPU resource.
CPUSpec	Base resource specification for CPU resources.
DescriptorIOSpec	Resource specification for file descriptors.
FileSystemResource	Provides java level access to a team's file system resource.
FileSystemSpec	Specification for the file system resource.
GCPolicy	Base class for objects that implement a specific policy for the GC.
IOResource	Provides java level access to the current team's IO resource.
IOSpec	Base resource specification for IO resources.
LogResource	Provides java level access to the current team's log resource.
LogSpec	Resource specification for the log file.
MemoryResource	Provides java level access to the current team's memory resource.
MemorySpec	Specification for memory resources.
NameSpaceGroup	Helper class for NameSpaceSpec that specifies which class groups to import from a team.
NameSpaceResource	Provides access methods to the current team's root name space.
NameSpaceSpec	Resource specification for the root name space of a team.
NativeSpec	Specification for the native library resource.
ResourceSpec	Base class for resource specifications.
StdioSpec	Resource specification for the standard I/O channels for a Team.
StrideCPUSpec	Specification for a stride scheduled CPU.

Exception Summary

ClassGroupNotFoundException	Exception indicating that the class group couldn't be found in the config file.
DuplicateResourceSpecException	Exception indicating that there was a duplicate resource spec in the array of ResourceSpec's passed to Team.create().
InvalidClassGroupException	Exception indicating that the class group being exported is malformed.
ResourceSpecException	Exception indicating that the system couldn't satisfy a resource specification.
ViewGroupNotFoundException	Exception indicating that the view group couldn't be found in the config file.

Package edu.utah.janosvm.resources Description

Resources managed by the JanosVM on a per-team basis. Managed resources are:

Classpath - The parts of the global class path that a team is able to access.

Memory - The amount of memory available to the team and the policy for the GC.

Namespace - The namespace for the java code running in the team. This works similarly to a standard VM, class loaders have their own name spaces that are separate from each other and classes loaded into the team can't be seen by other teams. However, in order for teams to communicate they'll need to be able to share classes, so the name space resource allows teams to export groups of classes from their name space so that other teams can import these classes into their root name space.

Stdio - The source/sink for the System.in, System.out, and System.err I/O streams. When running the VM on unix these can just piggy back the stdio values for the VM, or they can be redirected to their own files.

For each resource a specification and a client object exist. The specification is the object that communicates what is required from the resource when creating a new team. For example, creating a team with the spec, new MemorySpec(8 * 1024 * 1024), would give the new team an eight megabyte memory limit. The client object is the object held by the team that gives it access to the resource. In the case of global resources like memory, the client object is manipulated through static methods in the corresponding resource class, for example, MemoryResource.