Abstract: A system assures quality of service provided by a distributed network having at least one object. The system creates a contract that stores levels of quality of service offered by the network, determines a quality of service required by the object, and evaluates the contract to select a level of quality of service that corresponds to a current quality of service provided by the network. The system then compares the current quality of service to the required quality of service, and adjusts the current quality of service to obtain the required quality of service when the current quality of service fails to satisfy the required quality of service.

Abstract: A delegate assures quality of service in a distributed system while performing a remote object invocation. The delegate receives a request for the remote object invocation from a client object, identifies a current quality of service provided by the distributed system, and determines whether the current quality of service is acceptable. The delegate then performs the requested remote object invocation when the current quality of service is acceptable.

Abstract: A distributed system provides a quality of service by generating at least one system condition object storing a value, monitoring at least one resource in real time using the system condition object, and setting the value of the system condition object in response to the monitoring of the resource. The system determines a current quality of service based on the value stored in the system condition object. The system then regulates activity within the distributed system based on the determined quality of service.