US 2003/0131099 A1 · Method and system for property notification

Abstract

A method system for tracking the state of an entity (e.g., an object) on behalf of a client (e.g., an application program). The states of an entity include up and down. The tracking system of the present invention receives a request from a client to track the state of an entity. The tracking system then watches the state of the entity to detect when the entity enters the up state. When the entity enters the up state, the tracking system performs a behavior that is specified by the client to be performed when the entity enters the up state. When the entity, is in the up state, the tracking system monitors the state of the entity to detect when the entity enters the down state. When the entity enters the down state, the tracking system performs a behavior that is specified by the client to be performed when the entity enters the down state. When the tracking system receives a request from the client for a pointer to the entity, the tracking system determines the current state of the entity and either provides a pointer to the entity or indicates that a pointer is not being provided.

Claims35

Dependent claims

In a system for a distributed computing environment, wherein the system includes a communications bus, a bus manager having at least one bus management component, at least one server node and at least one client node, wherein said at least one server node, said at least one client node and said at least one bus management component are interconnected via said communications bus, and wherein each of said at least one client node includes a property watching component and at least one client resource that may request watching, aided by the property watching component, of at least one property of at least one server resource of said at least one server node, a method for communicating between a server resource and a client resource when the client resource is watching a property of the server resource, comprising:

first registering by the client resource to track a property of a server resource;
after the server resource enters the up state, second registering by the client resource to watch a property of the server resource;
and
after the property of the server resource is set, invoking by the server resource a property set function of the client resource.

1 more element

In a system for a distributed computing environment, wherein the system includes a communications bus, a bus manager having at least one bus management component, at least one server node and at least one client node, wherein said at least one server node, said at least one client node and said at least one bus management component are interconnected via said communications bus, and wherein each of said at least one client node includes at least one client resource for requesting watching of at least one property of at least one server resource of said at least one server node, a method for registering to watch a property of the server resource by the client resource, comprising:

invoking a register watch function of a client resource, wherein the register watch function is passed an identification of the server resource to be watched, an identification of a property of the server resource to be watched, and an identification of the client resource that will be watching the server resource;
determining whether the client resource is already watching the property;
and
if the client resource is not already watching the property according to said determining, generating a unique context for the client resource and the property.

1 more element

Dependencies are inferred from the claim text.

Method and system for property notification

Life of this patent

Method and system for property notification

Life of this patent

Abstract

Claims35