System and method to control and administer distributed object servers using first class distributed objects

• US 5,802,291 A
• Filed: 03/30/1995
• Issued: 09/01/1998
• Est. Priority Date: 03/30/1995
• Status: Expired due to Term

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: van Hoff, Arthur A., McChesney, Roderick J., Balick, Maurice
• Primary Examiner(s): Rinehart, Mark H.
• Application Number:
  US08/413,402
• Time in Patent Office: 1,251 Days
• Field of Search: 395/200.1, 395/200.03, 395/200.09, 395/200.01, 395/500, 395/650, 395/200.011, 395/200.18, 395/200.32, 395/200.33, 395/200.54, 395/683 , 395/684
• US Class Current: 709/202
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548

Abstract

A networked computer system contains a number of host computers with servers that provide various functionality to distributed clients on the network. Clients are able to access runtime information about servers on remote host computers, even where the clients have only object references to the servers through the presence of an embedded first class object within each server process. The first class object can be used to determine the process identification of the server process, counts of active objects and implementations in the server process, and to control tracing and logging functions provided by application programming interfaces utilized by the server.

Claims

1. A computer system for providing a distributed object interface to a server executing as a server process, the system comprising:

a server including at least one distributed object as machine readable and executable structures, the server executing as a server process and not separately existing as a first class object; and

at least one first class object within the server including at least one machine executable structure adapted to execute as part of the server process and provide runtime information for the server process without interrupting execution of the server process, the first class object having an interface available to objects external to the server to enable manipulation of the server as a first class object.

2. The computer system of claim 1, further comprising:

a machine executable structure adapted to determine a process identification code for the server process.

3. The computer system of claim 1, wherein each distributed object within the server is an instance of an object implementation, and is either active, idle, or inactive, further comprising:

a first machine executable structure adapted to determine a number of distinct object implementations within the server; and

,

a second machine executable structure adapted to determine for each object implementation a number of active objects of the object implementation.

4. The computer system of claim 3 further comprising:

primary storage for storing the server process;

a processing unit for executing the server as the server process in the primary storage, the server process in the primary storage including at least one object executable by the processing unit as part of the server process;

a storage structure stored in the primary storage and having a stored representation of the object implementations and object instances contained within the server;

wherein;

the processing unit executing the server process generates the process identification code;

the second machine executable structure reads the storage structure to determine the number of distinct object implementations; and

the third machine executable structure reads the storage structure to determine the number of active objects.

5. The least one first class object of claim 1, further comprising:

a machine executable structure adapted to enable and disable automatic deallocation of resources held by idle objects within the server;

a machine executable structure adapted to establish a cycle time for the automatic deallocation of idle objects; and

a machine executable structure adapted to establish an maximum time interval for which the server containing the first class object can be idle, such that the server is automatically shutdown after a time interval equal to or exceeding the maximum time interval.

6. The least one first class object of claim 1, further comprising:

a machine readable structure adapted to identify at least one facility contained within the server, the facility including a set of trace flags;

a trace enable machine executable structure adapted to selectively enable a user specifiable facility and set of trace flags within the facility; and

,

a trace disable machine executable structure adapted to selectively disable a user specifiable facility and a set of trace flags within the facility.

7. The least one first class object of claim 6, further comprising:

a machine executable structure adapted to indicate whether trace information output by the facilities within the server is incorporated into an operating system message log; and

a machine executable structure adapted to specify at least one log file for storing trace information output by facilities within the server.

8. A computer implemented method of embedding an object within a server to provide runtime information about a server process executing the server, comprising the steps of:

defining an object interface definition language file for a first class object, the file specifying;

an interface to a first attribute or operation for obtaining a process identification number for a server process not separately existing as a first class object;

an interface to a second attribute or operating for obtaining a host name for a computer executing the server process;

defining an implementation file specifying source code of the first class object for implementing the first and second attributes or operations, respectively;

compiling at least one object for performing a function of the server, the object incorporated into the server, to produce a server file;

compiling the interface definition language file of the first class object to produce a set of source code files for interfacing the interface definition language file of the first class object to the implementation file of the first class object;

compiling the source code files and implementation file of the first class object to produce a first class object file;

linking the first class object file to the compiled server file to produce an executable server file; and

executing the server file to create a server process containing an instance of a first class object.

9. A computer implemented method for determining current state information about a server executing as a server process in a distributed object environment, the server not separately existing as a first class object, the method comprising the steps of:

receiving in a first object external to the server a request from a client object to determine current state information for a server;

invoking from the first object an operation on a second object known to be embedded in the server, the operation determining the current state information of the server;

executing the operation of the second object as part of the server process without interrupting the server process to determine the current state information; and

providing the current state information to the first object.

10. The method of claim 9, further comprising, before the step of receiving, the step of:

embedding in the server at least one second object, each second object having at least one operation for determining current state information about the server.

11. The method of claim 9, wherein the operation of the second object provides a process identifier for the server.

12. The method of claim 9, wherein the operation of the second object provides a count of active objects within the server.

13. The method of claim 9, wherein the operation of the second object provides a count of object implementations within the server.

14. The method of claim 9, wherein the operation of the second object provides a list of tracing facilities within the server.

15. The method of claim 14, wherein a second operation of the second object enables at least one tracing facility within the server.

16. The method of claim 14, wherein the second operation of the second object selectively enables at least one trace flag in a tracing facility.

17. The method of claim 9, wherein the operation of the second object designates a log file for outputting trace and log information for conditions resulting from execution of the server.

18. The method of claim 17, wherein a second operation of the second object establishes a number of log files to be used on a rotating basis.

19. The method of claim 9, wherein the operation of the second object establishes a maximum time interval for which the server can be idle, further comprising the step of:

shutting down the server after a time interval equal to or exceeding the maximum time interval.

20. The method of claim 9, wherein the operation of the second object establishes a cycle time for automatic deallocation of resources held by idle objects within the server.

21. The method of claim 20, wherein a second operation of the second object enables automatic deallocation of resources held by idle objects within the server.

22. A computer readable memory for use in a computer system and for providing a distributed object interface to a server executing as a server process, the memory comprising:

a server including at least one distributed object as machine readable and executable structures, the server executable by the computer system as a server process and not separately instantiated as a first class object in the system upon execution;

at least one first class object within the server including at least one method adapted to execute as part of the server process upon execution of the server, and further adapted to provide runtime information for the server process without interrupting execution of the server process, the first class object providing an interface to objects external to the server to enable manipulation of the server as a first class object by such external objects.