International Business Machines Corporation

Marc Gregory Smith

George Prentice Copeland

Michael Haden Conner

David Yu Chang

Erin Elizabeth Shepler

Frank Richard Campagnoni

Richard Dale Hoffman

Ambuj Goyal

Scott Harrison Danforth

Raghu Vishwanath Hudli

Timothy R Malkemus

Venu P Banda

Kevin J Greene

Dawn E Bezviner

A certain number of agents and tokens are created. A first agent that is assigned a request must obtain a token to process the request. The number of agents which may concurrently process requests are limited by preventing an agent from processing a request unless the agent has an assigned token. An additional agent is created after assigning the token to the first agent, provided that an existing agent is not available to wait for a request, and an unassigned token is available for the additional agent. A certain minimum number of agents is defined and an agent is automatically eliminated when the agent completes a request, provided that the number of agents that are assigned tokens exceeds the minimum number of agents.

System for allocating resources among agent processes

A method for a first process in a first address space to communicate with an object in a second address space including the steps of determining, during runtime of the first process, that a communication link is needed between the first process and a target object in the second address space, generating a proxy object in the first address space corresponding to the target object, and establishing the communication link between the first process and the target object through the proxy object. In addition, an apparatus for a first process in a first address space to communicate with an object in a second address space including apparatus for determining, during runtime of the first process, that a communication link is needed between the first process and a target object in the second address space, apparatus for generating a proxy object in the first address space corresponding to the target object, and apparatus for establishing the communication link between the first process and the target object through the proxy object.

Method and apparatus for utilizing proxy objects to communicate with target objects

A mechanism for passing a request from a calling object in a first address space to a target object in a second address space. First, the request is passed from the calling object to an object request broker (more general term&quest;) to which the calling object is written which normally handles requests to remote objects for the calling object. Responsive to a determination that the target object is foreign to the object request broker, a foreign object request broker to which the target object is written is located. A proxy object is generated according to the protocol of the foreign object request broker and stored in the first address space. A pointer is returned to calling object so that communication from the calling object to the target object may be established through the proxy object.

Universal object request broker encapsulater

Data processing application requests are processed in a computer system configured as a plurality of nodes with a plurality of interacting processes. Data is requested by an application request originating on a first node. The request data includes data located on a plurality of the nodes. A portion of computer memory on the nodes is established as agent message queues ('AMQ's'). A first process, acting as a coordinating agent, receives an application request on the first node. The coordinating agent generates a plurality of internal requests for the application request. The coordinating agent communicates the internal requests to a fast communication manager process ('FCM') on the first node. The first FCM, sends the internal requests to FCM's on the nodes having the request data ('request data nodes'), for storage in selected AMQ's on the request data nodes. The internal requests are retrieved from the selected AMQ's by processes acting as subordinate agents on the request data nodes. The subordinate agents may currently process the internal requests.

System for communicating messages among agent processes

A method for activating and executing objects containing data and procedures including the steps of relaying, by a first object in a first address space, a communication from a process in a second address space to a second object in the first address space, activating, by the second object, a third object containing data and procedures in response to the relayed communication, and executing, by the activated third object, an operation in response to the relayed communication. In addition, an apparatus for activating and executing remote objects containing data and procedures including a first object in a first address space for relaying a communication from a process in a second address space to a second object in the first address space, apparatus for activating, in the second object, a third object containing data and procedures in response to the relayed communication, and apparatus for executing, in the activated third object, an operation in response to the relayed communication.

Method and apparatus for activating and executing remote objects

A method, system and process for providing an improved database blocking technique for updatable and scrollable cursors is disclosed. The invention is facilitated by the operation of a process in the memory of a processor. The processor, under the control of the process, builds a reserved area in the memory of the computer. The reserved area in the memory contains an image of a portion of the information residing on disk in the database. When an application opens a cursor to a database, the type of blocking is specified for that cursor. The application issues a fetch request, and if the row is not in the block in the reserved area in the memory, then a remote procedure call is performed to get the required next block of rows and return the block containing the rows back to the application. Various lock data structures are employed to manage and control the processing.

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Austin, TX, United States of America

Marc Gregory Smith