Patent Publication Number: US-10789111-B2

Title: Message oriented middleware with integrated rules engine

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of U.S. application Ser. No. 13/173,052, filed Jun. 30, 2011, the entirety of which is incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to message passing and more particularly to message passing in message oriented middleware. 
     Description of the Related Art 
     Message oriented middleware refers to a programmatic infrastructure that supports the exchange of messages between distributed computing systems. In this regard, the message brokering operability of message oriented middleware allows application modules to be distributed over heterogeneous platforms while communicating through message queues managed by a messaging component and reduces the complexity of developing applications that span multiple operating systems and network protocols. In this regard, the message oriented middleware creates a distributed communications layer that insulates the application developer from the details of the various operating system and network interfaces. 
     Typically, in the simplest form, administration of message oriented middleware takes the form of embedded commands provided by the message oriented middleware that allows a system administrator to create and modify properties of the messaging component. With access to a set of embedded commands, the system administrator then can decide which properties of the messaging component to modify and when. With this type of setup, the administrator needs only a basic understanding of the messaging component of the message oriented middleware. Further, this type of administration generally works on a small scale. However, it is widely understood that message oriented middleware administration through embedded commands scales poorly in a multi-message component deployment. 
     The deployment of a management infrastructure tool such as a rules engine seeks to address the lack of scalability in the above-mentioned approach. A rules engine interacts with message oriented middleware through interprocess communications in order to retrieve operational characteristics of the middleware including message puts and gets, and provides operational directives through interprocess communications to the middleware in response to the application of rules to the retrieved operational characteristics. The use of a rules engine to manage the operation of message oriented middleware, however, it not without limitation. 
     In particular, as the rules engine is typically removed from the message oriented middleware, data exchanged between the two using interprocess communications is slow, since a network round trip is required. Therefore, there is usually an incentive to minimize the amount of data passed, to the control station, thus, effectively limiting the amount of information available to the control station. In the alternative, a rules engine accessing an application programming interface (API) to the message oriented middleware addresses some of the concerns in respect to slow data exchanges. However, to the extent that the rules engine and message oriented middleware are separate, with the rules engine being maintained by a completely separate group of developers from the developers maintaining the messaging oriented middleware, there are practical difficulties to making the rules engine work effectively with the messaging component and delays in upgrading the rules engine to account for new features in the messaging oriented middleware often arise. 
     BRIEF SUMMARY OF THE INVENTION 
     Embodiments of the present invention address deficiencies of the art in respect to the management of message oriented middleware and provide a novel and non-obvious method, system and computer program product for the integration of a rules engine with message oriented middleware. In an embodiment of the invention, a method for managing a messaging component in message oriented middleware has been provided. The method includes creating shared memory in the memory of a computer and adding or deleting tokens in the shared memory corresponding to objects such as messages and message queues, created in and removed from, respectively, in a messaging component of message oriented middleware, or topics or subscriptions or log file space for messages queues in the messaging component. The method additionally includes applying rules in a rules engine to the tokens in the shared memory. Finally, the method includes directing management operations in the messaging component responsive to the applied rules by the rules engine. 
     Additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The aspects of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. The embodiments illustrated herein are presently preferred, it being understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown, wherein: 
         FIG. 1  is a pictorial illustration of a process for managing a messaging component in message oriented middleware; 
         FIG. 2  is a schematic illustration of a message processing system configured with an integrated rules engine for managing a messaging component in message oriented middleware; and, 
         FIG. 3  is a flow chart illustrating a process for managing a messaging component in message oriented middleware. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Embodiments of the invention provide for a message processing system configured with an integrated rules engine for managing a messaging component in message oriented middleware. In accordance with an embodiment of the invention, a rules engine can be coupled to a messaging component within message oriented middleware. A working memory of the rules engine can be established in shared memory of the message oriented middleware and tokens can be created and removed in the working memory by the messaging component to correspond to the creation and removal of objects such as message queues, messages in message queues, topics, subscriptions or log file space for message queues in the messaging component. The rules engine in turn can apply management rules to the tokens in the working memory in order to direct management actions in the messaging component. 
     As a result of the tight coupling of the rules engine to the messaging component using the working memory in the shared memory, the rules engine can provide an alternative view of messaging data allowing for more flexibility in the management of the message oriented middleware. Further, as the rules engine through a sharing of the working memory with the messaging component becomes part of the message oriented middleware, the rules engine has open access to the data known to the messaging system. Of import, based upon the tight coupling of the rules engine with the messaging component, the rules engine is not limited by communications latencies in detecting conditions in the messaging component. 
     In further illustration,  FIG. 1  is a pictorial illustration of a process for managing a messaging component in message oriented middleware. As shown in  FIG. 1 , message oriented middleware  100  can include both a messaging component  150  and a rules engine  130  coupled to the messaging component  150  by way of shared memory  140 . Messaging component  150  can manage different objects  160  subsisting in the message oriented middleware  160 , for example message queues, messages in message queues, topics or subscriptions or log file space for message queues and the like. Messaging component  150  further can create in the shared memory  140 , tokens  120  each token corresponding to one of the objects  160 . The rules engine  130 , in turn, can monitor the shared memory  140  and can apply rules  110  to the tokens  120  in the shared memory  140 . In this way, the rules  110  of the rules engine  130  can be applied without delay to changes in the objects  160  reflected by corresponding changes in the tokens  120 . 
     The process described in connection with  FIG. 1  can be implemented within a message data processing system. In yet further illustration,  FIG. 2  schematically shows a message data processing system configured with an integrated rules engine for managing a messaging component in message oriented middleware. The system can include a host server  200  configured for communicative coupling to different client computers  205  over computer communications network  215 . The host server  200  can include at least one processor  220  and memory  230  supporting the execution of operating system  240 . The operating system  240  in turn can host the operation of message oriented middleware  250  that includes at least one messaging component  260  managing message exchanges in one or more message queues (not shown). 
     As shown in  FIG. 2 , rules engine  270  can be coupled to the messaging component  260  and can apply one or more messaging component management rules (not shown) to tokens in working memory  270  in order to direct management operations in the messaging component  260 . Of note, a rules engine integration module  300  can be coupled to the messaging component  260 . The module  300  can include program code enabled to monitor the creation, deletion and modification of objects in the messaging component  260  such as message queues or messages within message queues, or topics or subscriptions or log file space for message queues, and to maintain corresponding tokens in the working memory  270 . In this way, the rules engine  270  can apply the rules to the tokens when changes occur in the tokens which contemporaneously relate to objects in the messaging component  260 . 
     In yet further illustration of the operation of the rules engine integration module  300 ,  FIG. 3  is a flow chart illustrating a process for managing a messaging component in message oriented middleware. As shown in  FIG. 3 , the messaging component and rules engine can act asynchronously to contemporaneously communicate object changes in the messaging component through the use tokens of shared memory so that the rules engine can respond to changes in the tokens with the application of one or more management rules to the tokens to direct management operations in the messaging component. Beginning in block  310 , a change can be detected in an object in the messaging component. In block  320 , it can be determined if the change is the addition of a new component. If so, in block  330  a corresponding token can be created in shared memory. Otherwise, the process can continue through block  340 . 
     In block  340 , a token corresponding to the changed object can be selected in the shared memory. Thereafter, in decision block  350 , it can be determined whether or not the change to the object in the messaging component is the removal of the object. If so, in block  360  the selected token can be removed from shared memory. Otherwise, in decision block  370  it can be determined whether or not the change to the object is a modification of the characteristics of the object. If so, in block  380  a corresponding indication of the modification of the characteristics can be applied to the selected token in shared memory. 
     Concurrently with the operation of the messaging component, in block  390  the rules engine can monitor changes to tokens in the shared memory. In decision block  400 , it can be determined whether or not a token in shared memory has changed. If so, in block  410 , one or more rules can be applied to the token to determine a course of action to be directed in the messaging component by the rules engine. 
     As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or computer program product. Accordingly, aspects of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system,” Furthermore, aspects of the present invention may take the form of a computer program product embodied in one or more computer readable medium(s) having computer readable program code embodied thereon. 
     Any combination of one or more computer readable medium(s) may be utilized. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. 
     A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. 
     Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radiofrequency, and the like, or any suitable combination of the foregoing. Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language and conventional procedural programming languages. The program code may execute entirely on the user&#39;s computer, partly on the user&#39;s computer, as a stand-alone software package, partly on the user&#39;s computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user&#39;s computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider). 
     Aspects of the present invention have been described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. In this regard, the flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. For instance, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. 
     It also will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
     These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks. The computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
     Finally, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the invention. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.