Distributed pluggable middleware services

• US 8,276,167 B2
• Filed: 03/21/2007
• Issued: 09/25/2012
• Est. Priority Date: 03/21/2007
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Challenger, James R., Degenaro, Louis R., Giles, James R., Wagle, Rohit
• Primary Examiner(s): Truong, Lechi
• Assistant Examiner(s): Kraft, Shih-Wei
• Application Number:
  US11/689,010
• Publication Number:
  US 20080235710A1
• Time in Patent Office: 2,015 Days
• Field of Search: None
• US Class Current: 719/331
• CPC Class Codes: G06F 9/5027 the resource being a machine, e.g. CPUs, Servers, Terminals

Abstract

Plug-in configurable middleware is provided for managing distributed applications. The middleware includes at least one core runtime engine configured as a plurality of concurrent instantiations on one or more hosts within a distributed architecture. These hosts can represent separate nodes or a single node within the architecture. Each core runtime engine instance provides the minimum amount of functionality required to support the instantiation of one or more plug-ins within that core runtime engine instance. Each core runtime engine instance is in communication with other concurrent core runtime engine instances and can share the functionality of plug-in instances with the other core runtime engine instances, for example through the use of proxies. A plurality of personalities representing pre-defined functions is defined and one of more of these personalities is associated with each core runtime engine instance. A plurality of pre-defined plug-ins are defined and associated with the personalities.

Claims

1. A runtime architecture for distributed plug-in configurable middleware for managing distributed applications, the architecture comprising:

a plurality of hosts, each host comprising a computer hardware platform;

at least one core runtime engine;

a plurality of personalities, each personality comprising a definition of a function;

a plurality of pre-defined plug-ins, each plug-in associated with one or more of the plurality of personalities and comprising runtime code that provides at least a portion of the function of each personality to which the plug-in is associated and the plurality of plug-ins comprising functional dependencies among the plug-ins, the dependencies comprising relationships among the plug-ins for communicating, cooperating and sharing resources among core runtime engine instances running on the plurality of hosts to achieve the distributed middleware;

a plurality of concurrent instantiations of the core runtime engine on the plurality of hosts, each core runtime engine instance comprising sufficient functionality to support plug-in architecture of the pre-defined plug-ins and modified by the pre-defined plug-ins to have personalities associated with those plug-ins, each core runtime instance in communicating, cooperating and sharing resources with other concurrent core runtime engine instances as provided by its associated plug-ins to contribute the functions associated with the personalities associated with the plug-ins used to modify that core runtime instance and to provide the dependencies among the plug-ins in order to establish the distributed middleware within a distributed computing system;

wherein each plug-in is utilized by each core runtime engine instance having an associated personality to which the plug-in is associated;

at least one configuration manager in communication with each one of the plurality of core runtime engine instances, the configuration manager capable of determining an architecture for the distributed middleware and of distributing plug-ins to the core runtime engine instances;

at least one persistent storage device in communication with the configuration manager and comprising the plurality of plug-ins;

wherein the host comprises an interface mechanism in communication with the configuration manager to facilitate instantiations of the core runtime engine on the host in accordance with the determined architecture; and

wherein each plug-in comprises a core definition comprising instructions for loading and starting the plug-in, a properties section comprising a set of plug-in properties specific to that plug-in and a dependencies section comprising a description of the dependencies comprising the relationships between that plug-in and another plug-in.

2. The runtime architecture of claim 1, further comprising a schema comprising parameters for validating each pre-defined plug-in.

3. The runtime architecture of claim 2, wherein each plug-in comprises an extensible mark-up language document and the schema comprises an extensible mark-up language schema.

4. The runtime architecture of claim 1, wherein the plurality of hosts further comprises virtual machines.

5. The runtime architecture of claim 1, further comprising a plug-in instance management application program interface to facilitate dynamic runtime management of each plug-in.

6. The runtime architecture of claim 5, wherein the dynamic runtime management comprises creating plug-ins, retrieving plug-ins from a persistent storage location, updating plug-ins, deleting plug-ins, loading plug-ins, unloading plug-ins, reloading plug-ins or combinations thereof.

7. The runtime architecture of claim 1, wherein execution of one of the plurality of plug-ins is dependent upon execution of another one of the plurality of plug-ins.

8. The runtime architecture of claim 1, further comprising a proxy associated with a first core runtime engine instance, the proxy associated with a plug-in instance resident on a second core runtime instance and facilitating utilization of the plug-in instance by the first core runtime engine instance.

9. The runtime architecture of claim 8, further comprising a proxy management application program interface to facilitate dynamic runtime management of the proxy.

10. The runtime architecture of claim 9, wherein the dynamic runtime management comprises finding plug-ins, finding proxies, creating a plug-in for a proxy, destroying a proxy for a plug-in, static proxy routing, dynamic proxy routing or combinations thereof.

11. A method for managing a computer application within a distributed environment, the method comprising:

defining a plurality of personalities, each personality comprising a pre-defined function;

associating at least one plug-in with each personality, each plug-in comprising runtime code that provides at least a portion of the function of the personality to which the plug-in is associated and a function dependency with other plug-ins, this dependency comprising relationships between that plug-in and the other plug-ins for communicating, cooperating and sharing resources among core runtime engine instances running on a plurality of hosts to achieve the computer application within the distributed environment;

instantiating a core runtime engine on each one of the plurality of hosts within the distributed environment, each core runtime engine instance comprising sufficient functionality to support plug-in architecture and each core runtime instance in communication with other concurrent core runtime engine instances, and each host comprising a computer hardware platform;

associating at least one of the plurality of personalities with each one of the plurality of core runtime engine instances, each personality providing the pre-defined functionality associated with that personality to the core runtime engine instance to which that personality is associated;

instantiating plug-ins on the core runtime engine instances in accordance with the associations between the personalities and the core runtime engine instances to modify the core runtime engine instances to have associated personalities, the plurality of core runtime engine instances working together in accordance with their associated dependencies to contribute their associated functionalities and to establish a distributed computing system;

utilizing each plug-in by each core runtime engine instance having an associated personality to which the plug-in is associated;

using a configuration manager in communication with each core runtime engine instance to determine an architecture for the distributed environment and to instantiate plug-ins on the appropriate core runtime engine instances;

using an interface mechanism in communication with the configuration manager to facilitate instantiations of the core runtime engine on each host in accordance with the determined architecture; and

providing a description for each plug-in comprising a core definition comprising instructions for loading and starting each the plug-in, a properties section comprising a set of plug-in properties specific to that plug-in dependencies section comprising a description of the dependencies comprising the relationships between that plug-in and another plug-in.

12. The method of claim 11, further comprising using a schema comprising parameters to validate each plug-in.

13. The method of claim 12, further comprising:

expressing each plug-in in extensible mark-up language; and

expressing the schema in extensible mark-up language.

14. The method of claim 11, further comprising designating each plug-in as either a non-shared plug-in for sharing a given instance of that plug-in with only one additional plug-in or a shared plug-in for sharing the given plug-in instance with two or more additional plug-ins.

15. The method of claim 11, further comprising using a plug-in instance management application program interface to facilitate dynamic runtime management of each plug-in.

16. The method of claim 15, wherein the dynamic runtime management comprises plug-in definition creation, plug-in definition retrieval, plug-in definition updating, plug-in definition deletion, plug-in instance loading, plug-in instance unloading, plug-in instance reloading or combinations thereof.

17. The method of claim 11, further comprising determining dependencies among the plurality of plug-ins and instantiating plug-ins in accordance with the dependencies.

18. The method of claim 11, further comprising:

deploying a proxy on a first core runtime engine instance;

associating the proxy a plug-in instance on a second core runtime instance; and

using the proxy to facilitate utilization of the plug-in instance by the first core runtime instance.

19. The method of claim 18, further comprising using a proxy application program interface to facilitate dynamic runtime management of the proxy.

20. The method of claim 19, wherein the dynamic runtime management comprises finding plug-ins, finding proxies, creating a plug-in for a proxy, destroying a proxy for a plug-in, static proxy routing, dynamic proxy routing or combinations thereof.

21. The method of claim 11, wherein the plurality of personalities collectively comprise a job control system and the pre-defined functions comprise a dispatcher, a submit agent, a node controller, an optimizer, a dispatcher shadow, a resource manager or combinations thereof.

22. A non-transitory computer-readable medium containing a computer-readable code that when read by a computer causes the computer to perform a method for managing a computer application within a distributed environment, the method comprising:

defining a plurality of personalities, each personality comprising a pre-defined function;

associating at least one plug-in with each personality, each plug-in comprising runtime code that provides at least a portion of the function of the personality to which the plug-in is associated and a function dependency with other plug-ins, this dependency comprising relationships between that plug-in and the other plug-ins for communicating, cooperating and sharing resources among core runtime engine instances running on a plurality of hosts to achieve the computer application within the distributed environment;

instantiating a core runtime engine on each one of the plurality of hosts within the distributed environment, each core runtime engine instance comprising sufficient functionality to support plug-in architecture and each core runtime instance in communication with other concurrent core runtime engine instances, and each host comprising a computer hardware platform;

associating at least one of the plurality of personalities with each one of the plurality of core runtime engine instances, each personality providing the pre-defined functionality associated with that personality to the core runtime engine instance to which that personality is associated;

instantiating plug-ins on the core runtime engine instances in accordance with the associations between the personalities and the core runtime engine instances to modify the core runtime engine instances to have associated personalities, the plurality of core runtime engine instances working together in accordance with their associated dependencies to contribute their associated functionalities and to establish a distributed computing system;

utilizing each plug-in by each core runtime engine instance having an associated personality to which the plug-in is associated;

using a configuration manager in communication with each core runtime engine instance to determine an architecture for the distributed environment and to instantiate plug-ins on the appropriate core runtime engine instances;

using an interface mechanism in communication with the configuration manager to facilitate instantiations of the core runtime engine on each host in accordance with the determined architecture; and

providing a description for each plug-in comprising a core definition comprising instructions for loading and starting each the plug-in, a properties section comprising a set of plug-in properties specific to that plug-in and a dependencies section comprising a description of relationships between that plug-in and another other plug-in.

23. The non-transitory computer-readable medium of claim 22, wherein the method further comprises designating each plug-in as either a non-shared plug-in for sharing a given instance of that plug-in with only one additional plug-in or a shared plug-in for sharing the given plug-in instance with two or more additional plug-ins.

24. The non-transitory computer-readable medium of claim 22, wherein the method further comprises determining dependencies among the plurality of plug-ins and instantiating plug-ins in accordance with the dependencies.

25. The non-transitory computer-readable medium of claim 22, wherein the method further comprises:

deploying a proxy on a first core runtime engine instance;

associating the proxy a plug-in instance on a second core runtime instance; and

using the proxy to facilitate utilization of the plug-in instance by the first core runtime instance.

26. The non-transitory computer-readable medium of claim 25, wherein the method further comprises using a proxy application program interface to facilitate dynamic runtime management of the proxy, the dynamic runtime management comprising finding plug-ins, finding proxies, creating a plug-in for a proxy, destroying a proxy for a plug-in, static proxy routing, dynamic proxy routing or combinations thereof.

27. A computing system comprising:

a plurality of hosts, each host comprising a computer hardware platform within the computing system, the computing system executing a plug-in configurable middleware for managing distributed applications, the middleware comprising;

a plurality of concurrent instantiations of a core runtime engine on at least one host, each core runtime time engine instance configured to support plug-in architecture and each core runtime engine instance in communication with other concurrent core runtime engine instances;

a plurality of pre-defined plug-ins, one or more of the plurality of plug-ins associated with one or more of the plurality of concurrent core runtime engine instances and each plug-in comprising runtime code that provides at least a portion of an additional function to the core runtime engine to which that plug-in is associated and the plurality of plug-ins comprising functional dependencies among the plug-ins, the dependencies comprising relationships among the plug-ins for communicating, cooperating and sharing resources among core runtime engine instances running on the hosts to achieve the middleware;

wherein each core runtime engine instance is modified by one of the pre-defined plug-ins to have the personality associated with that plug-in, contributes a function associated with that personality, communicates, cooperates and shares resources with other concurrent core runtime engine instances as provided by its associated plug-ins and provides the dependencies among the plug-ins in order to establish the middleware within a distributed computing system;

wherein each plug-in is utilized by each core runtime engine instance having an associated personality to which the plug-in is associated;

at least one configuration manager in communication with each one of the plurality of core runtime engine instances, the configuration manager capable of determining an architecture for the distributed middleware and of distributing plug-ins to the core runtime engine instances;

at least one persistent storage device in communication with the configuration manager and comprising the plurality of plug-ins;

wherein the host comprises an interface mechanism in communication with the configuration manager to facilitate instantiations of the core runtime engine on the host in accordance with the determined architecture; and

wherein each plug-in comprises a core definition comprising instructions for loading and starting the plug-in, a properties section comprising a set of plug-in properties specific to that plug-in and a dependencies section comprising a description of the dependencies comprising the relationships between that plug-in and another plug-in.