US 5,377,350 AGranted

System for cooperative communication between local object managers to provide verification for the performance of remote calls by object messages

AssigneeInternational Business Machines Corporation

InventorHarold R. Skinner

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Abstract

Object managers on different computing platforms communicate with each other in a cooperative manner, while allowing the objects on the computing platforms to communicate with each other using a remote procedure call which preserves the object oriented characteristics of data independence and encapsulation. Preferably, each object manager indicates to the other object manager whether local objects have successfully responded to remote messages. The object manager can thereby preserve integrity of the object oriented system by committing or rolling back the system in response to completion of specific tasks or failure to complete specific tasks, even though some of the tasks occurred outside the local object oriented computing environment.

Claims22

Dependent claims

An object oriented cooperative data processing system comprising:

a first computing platform;
a first object oriented computing environment executing on said first computing platform, said first object oriented computing environment comprising:
a plurality of first objects, each including associated data and at least one method;
and
a first object manager including means for directing action messages between said plurality of first objects;
a second computing platform;
a second object oriented computing environment executing on said second computing platform, said second object oriented computing environment comprising:
a plurality of second objects, each including associated data and at least one method;
and
a second object manager including means for directing action messages between said plurality of second objects;
and
means for communicatively connecting said first computing environment and said second computing environment;
said first object manager further comprising:
means for identifying a first action message from one of said first plurality of objects which is directed to one of said second plurality of objects;
and
means, responsive to said identifying means, for transmitting said first action message to said one of said second objects via said connecting means;
said second object manager further comprising:
means for determining whether said one of said second objects successfully performed said first action message;
and
means, responsive to said determining means, for providing to said first object manager an indication of whether said one of said second objects successfully performed said first action message.

17 more elements

An object oriented cooperative data processing system comprising:

a first computing platform;
a first object oriented computing environment executing on said first computing platform, said first object oriented computing environment comprising:
a plurality of first objects;
and
first means for managing said plurality of first objects;
a second computing platform;
a second object oriented computing environment executing on said second computing platform, said second object oriented computing environment comprising:
a plurality of second objects;
and
second means for managing said plurality of second objects;
and
means for communicatively connecting said first computing environment and said second computing environment;
said first object managing means comprising:
first means for indicating to said second object managing means, whether successful performance by said first objects of messages from said second objects has occurred;
and
first means for receiving from said second object managing means, indications of whether said second objects successfully performed messages from said first objects;
said second object managing means comprising:
second means for indicating to said first object managing means, whether successful performance by said second objects of messages from said first objects has occurred;
and
second means for receiving from said first object managing means, indications of whether said first objects successfully performed messages from said second objects.

17 more elements

An object oriented cooperative data processing system comprising:

a first computing platform;
a first object oriented computing environment executing on said first computing platform, said first object oriented computing environment comprising:
a plurality of first objects, each including associated data and at least one method;
and
a first local object manager including means for directing action messages between said plurality of first objects;
a second computing platform;
a second object oriented computing environment executing on said second computing platform, said second object oriented computing environment comprising:
a plurality of second objects, each including associated data and at least one method;
and
a second local object manager including means for directing action messages between said plurality of second objects;
and
means for communicatively connecting said first computing environment and said second computing environment;
said first object oriented computing environment further comprising:
a first client stub for identifying a first action message from one of said first plurality of objects which is directed to one of said second plurality of objects;
and
a first conversation server, responsive to said first client stub, for transmitting said first action message to said one of said second objects via said connecting means;
said second object oriented computing environment further comprising a second conversation server for determining whether said one of said second objects successfully performs said first action message, and for providing to said first local object manager an indication of whether said one of said second objects successfully performed said first action message.

14 more elements

A method for providing cooperative processing in an object oriented data processing system, said object oriented data processing system comprising:

a first computing platform;
a first object oriented computing environment executing on said first computing platform, said first object oriented computing environment comprising:
a plurality of first objects, each including associated data and at least one method;
and
a first object manager including means for directing action messages between said plurality of first objects;
a second computing platform;
a second object oriented computing environment executing on said second computing platform, said second object oriented computing environment comprising:
a plurality of second objects, each including associated data and at least one method;
and
a second object manager including means for directing action messages between said plurality of second objects;
and
means for communicatively connecting said first computing environment and said second commuting environment;
said cooperative processing method comprising the following steps performed by said first object manager:
identifying a first action message from one of said first plurality of objects which is directed to one of said second plurality of objects;
and
transmitting said first action message to said one of said second objects via said connecting means;
said cooperative processing method further comprising the following steps performed by said second object manager:
determining whether said one of said second objects successfully performed said first action message;
and
providing to said first object manager an indication of whether said one of said second objects successfully performed said first action message.

17 more elements

A method for providing cooperative processing in an object oriented data processing system, said object oriented data processing system comprising:

a first computing platform;
a first object oriented computing environment executing on said first computing platform, said first object oriented computing environment comprising:
a plurality of first objects;
and
first means for managing said plurality of first objects;
a second computing platform;
a second object oriented computing environment executing on said second computing platform, said second object oriented computing environment comprising:
a plurality of second objects;
and
second means for managing said plurality of second objects;
and
means for communicatively connecting said first computing environment and said second computing environment;
said cooperative processing method comprising the following steps performed by said first object managing means:
indicating to said second object managing means, whether successful performance by said first objects of messages from said second objects has occurred;
and
receiving from said second object managing means, indications of whether said second objects successfully performed messages from said first objects;
said cooperative processing method comprising the following steps performed by said second object managing means:
indicating to said first object managing means, whether successful performance by said second objects of messages from said first objects has occurred;
and
receiving from said first object managing means, indications of whether said first objects successfully performed messages from said second objects.

17 more elements

Dependencies are inferred from the claim text.