org.apache.river.phoenix

Class SystemAccessILFactory.SystemDispatcher

java.lang.Object

net.jini.jeri.BasicInvocationDispatcher

org.apache.river.phoenix.SystemAccessILFactory.SystemDispatcher

All Implemented Interfaces:

InvocationDispatcher

Enclosing class:

SystemAccessILFactory

public static class SystemAccessILFactory.SystemDispatcher
extends BasicInvocationDispatcher

A subclass of BasicInvocationDispatcher for ActivationSystem instances that optionally enforces a GroupPolicy on calls to registerGroup and setActivationGroupDesc.

Constructor Summary

Constructors

Constructor and Description

SystemDispatcher(Collection methods, Remote impl, ServerCapabilities serverCaps, MethodConstraints serverConstraints, Class permClass, GroupPolicy policy, boolean localAccessCheck, ClassLoader loader) Creates an invocation dispatcher to receive incoming remote calls for the specified methods, for a server and transport with the specified capabilities, enforcing the specified constraints, and performing preinvocation access control using the specified permission class and group policy.

Method Summary

Modifier and Type	Method and Description
protected void	checkAccess(Remote impl, Method method, InvocationConstraints constraints, Collection context) Checks that the client is calling from the local host.
protected Object	invoke(Remote impl, Method method, Object[] args, Collection context) Checks the group policy as necessary, and then calls the superclass invoke method with the same arguments, and returns the result.

Methods inherited from class net.jini.jeri.BasicInvocationDispatcher

checkClientPermission, checkPermissionClass, createMarshalInputStream, createMarshalOutputStream, dispatch, getClassLoader, marshalReturn, marshalThrow, unmarshalArguments, unmarshalMethod

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SystemDispatcher

public SystemDispatcher(Collection methods,
                        Remote impl,
                        ServerCapabilities serverCaps,
                        MethodConstraints serverConstraints,
                        Class permClass,
                        GroupPolicy policy,
                        boolean localAccessCheck,
                        ClassLoader loader)
                 throws ExportException

Creates an invocation dispatcher to receive incoming remote calls for the specified methods, for a server and transport with the specified capabilities, enforcing the specified constraints, and performing preinvocation access control using the specified permission class and group policy. The specified class loader is used by the createMarshalInputStream method.

For each combination of constraints that might need to be enforced (obtained by calling the possibleConstraints method on the specified server constraints, or using an empty constraints instance of the specified server constraints instance is null), calling the checkConstraints method of the specified capabilities object with those constraints must return true, or an ExportException is thrown.

Parameters:

methods - a collection of Method instances for the remote methods

impl - the remote object

serverCaps - the transport capabilities of the server

serverConstraints - the server constraints, or null

permClass - the permission class, or null

policy - the group policy, or null

localAccessCheck - if true, calls are only accepted from the local host

loader - the class loader, or null

Throws:

IllegalArgumentException - if impl is not an instance of ActivationSystem or if the permission class is abstract, is not a subclass of Permission, or does not have a public constructor that has either one String parameter or one Method parameter and has no declared exceptions, or if any element of methods is not a Method instance

NullPointerException - if impl, methods or serverCaps is null, or if methods contains a null element

ExportException - if any of the possible server constraints cannot be satisfied according to the specified server capabilities

Method Detail

checkAccess

protected void checkAccess(Remote impl,
                           Method method,
                           InvocationConstraints constraints,
                           Collection context)

Checks that the client is calling from the local host.

Overrides:

checkAccess in class BasicInvocationDispatcher

Parameters:

impl - the remote object

method - the remote method

constraints - the enforced constraints for the specified method, or null

context - the server context

Throws:

AccessControlException - if the client is not calling from the local host

invoke

protected Object invoke(Remote impl,
                        Method method,
                        Object[] args,
                        Collection context)
                 throws Throwable

Checks the group policy as necessary, and then calls the superclass invoke method with the same arguments, and returns the result. If the policy is not null and the specified method is ActivationSystem.registerGroup or ActivationSystem.setActivationGroupDesc, the policy is checked by calling its checkGroup method with the ActivationGroupDesc argument.

Overrides:

invoke in class BasicInvocationDispatcher

Parameters:

impl - the remote object

method - the Method instance corresponding to the interface method invoked on the remote object

args - the method arguments

context - the server context passed to the dispatch method for the remote call being processed

Returns:

the result of the method invocation on impl

Throws:

SecurityException - if the caller is not permitted to use the specified group descriptor

NullPointerException - if any argument is null

Throwable - the exception thrown from the method invocation on impl