Abstract:
The dynamic workflow documentation system is a computer implemented process comprising the following steps: The dynamic workflow documentation system starts a workflow manager program, a class loader program in a computer memory and creates an instance of a workflow program in the computer memory. The dynamic workflow documentation system extracts metadata properties from the workflow program and records the metadata properties in the memory. The dynamic workflow documentation system notifies the workflow manager that a new instance of the workflow program has been created and repeats the steps of creating an instance of a workflow component program, extracting metadata properties, recording the metadata properties and notifying the workflow manager for all workflow components associated with the workflow program. Security and auditing functions of the dynamic workflow documentation system ensure that workflow programs execute according to the workflow requirements.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of and claims the benefit of priority to U.S. patent application No. 11/388,003, filed on Mar. 23, 2006 and entitled “Dynamic Workflow Documentation System”, issued as U.S. Pat. No. 7,752,614 on Jul. 6,2010. The present invention is related to the subject matter of U.S. patent application No. 11/225,678, filed on Sep. 13, 2005 and entitled “Workflow Application having Linked Workflow Components”, issued as U.S. Pat. No. 7,415,485 on Aug. 19, 2008 incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention comprises subject matter directed to organizing and relating workflow components in an operational workflow process to facilitate the reporting and display of workflow status information. 
     BACKGROUND OF THE INVENTION 
     A “workflow” is a familiar concept to many people. Generally, a “workflow” is any series of steps or activities necessary for completing a particular task. A “workflow component” is any convenient set of related activities that the workflow treats as a single unit of activity. For example, the activities required to process an airline passenger before boarding an airplane could be described as a workflow. In such a scenario, the carrier generally verifies a passenger&#39;s identity, confirms the passenger&#39;s reservation, allocates a seat on the airplane, and prints a boarding pass. The carrier also may process a credit card transaction to pay for the ticket if the passenger has not yet paid. If the passenger has baggage, the carrier also may print a baggage tag. These activities likely are distributed among a number of employees throughout the organization. From the airline&#39;s perspective, then, the workflow is comprised of components executed by various employees. Thus, the workflow components of a “check-in” workflow could be described as: (1) get identification; (2) read passenger&#39;s credit card; (3) identify passenger&#39;s reservation; (4) get passenger&#39;s baggage; (5) allocate passenger&#39;s seat; (6) print passenger&#39;s boarding pass; (7) print passenger&#39;s baggage tag; and so forth. Some, all, or none, of these workflow components may be automated. 
     A “workflow application” is any computer program designed to coordinate or manage a workflow, particularly in an enterprise setting. Thus, in the above example, a workflow application could coordinate the workflow components among the various employees that are involved in the transaction. 
     Workflow applications are common in the enterprise context. Many workflow applications are highly specialized for a specific industry, such as the medical application disclosed in U.S. Pat. No. 6,697,783 (issued Feb. 24, 2004). Other such systems, though, have been designed to accommodate more generalized needs, including the system disclosed in U.S. Pat. No. 6,567,783 (issued May 20, 2003). 
     Many workflow applications also track the status of workflows and provide a console or other means for displaying status information to a user. In practice, a single enterprise often uses a variety of workflow applications to coordinate and manage its everyday operations. But conventional workflow applications are stand-alone applications that are incapable of interacting with other workflow applications in a heterogeneous business system. An enterprise that uses a variety of workflow applications may require many consoles to monitor all of its workflows. 
     Thus, there is a need in the art for a system that organizes and relates workflow components in an operational workflow process to facilitate the reporting and display of workflow status information. 
     SUMMARY OF THE INVENTION 
     The dynamic workflow documentation system meets the need identified above. The dynamic workflow documentation system is a computer implemented process comprising the following steps: The dynamic workflow documentation system starts a workflow manager program, a class loader program in a computer memory and creates an instance of a workflow program in the computer memory. The dynamic workflow documentation system extracts metadata properties from the workflow program and records the metadata properties in the memory. The dynamic workflow documentation system notifies the workflow manager that a new instance of the workflow program has been created and repeats the steps of creating an instance of a workflow component program, extracting metadata properties, recording the metadata properties and notifying the workflow manager for all workflow components associated with the workflow program. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will be understood best by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein: 
         FIG. 1  illustrates an exemplary network of hardware devices in which the present invention can be practiced; 
         FIG. 2  is a schematic of a memory having components of the present invention stored therein; and 
         FIG. 3  is a flowchart of an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The principles of the present invention are applicable to a variety of computer hardware and software configurations. The term “computer hardware” or “hardware,” as used herein, refers to any machine or apparatus that is capable of accepting, performing logic operations on, storing, or displaying data, and includes without limitation processors and memory; the term “computer software” or “software,” refers to any set of instructions operable to cause computer hardware to perform an operation. A “computer,” as that term is used herein, includes without limitation any useful combination of hardware and software, and a “computer program” or “program” includes without limitation any software operable to cause computer hardware to accept, perform logic operations on, store, or display data. A computer program may, and often is, comprised of a plurality of smaller programming units, including without limitation subroutines, modules, functions, methods, and procedures. Thus, the functions of the present invention may be distributed among a plurality of computers and computer programs. The invention is described best, though, as a single program that configures and enables one or more general-purpose computers to implement the novel aspects of the invention. For illustrative purposes, the inventive computer program will be referred to as the “workflow program.” 
     Additionally, the workflow program is described below with reference to an exemplary network of hardware devices, as depicted in  FIG. 1 . A “network” comprises any number of hardware devices coupled to and in communication with each other through a communications medium, such as the Internet. A “communications medium” includes without limitation any physical, optical, electromagnetic, or other medium through which hardware or software can transmit data. For descriptive purposes, exemplary network  100  has only a limited number of nodes, including workstation computer  105 , workstation computer  110 , server computer  115 , and persistent storage  120 . Network connection  125  comprises all hardware, software, and communications media necessary to enable communication between network nodes  105 - 120 . Unless otherwise indicated in context below, all network nodes use publicly available protocols or messaging services to communicate with each other through network connection  125 . 
     Workflow program  200  and its components, including workflow components  205  and class loader  210  typically are stored in a memory, represented schematically as memory  220  in  FIG. 2 . The term “memory,” as used herein, includes without limitation any volatile or persistent medium, such as an electrical circuit, magnetic disk, or optical disk, in which a computer can store data or software for any duration. A single memory may encompass and be distributed across a plurality of media and network nodes. Workflow program  200  and its components may reside in any single network node, such as network nodes  105 - 120 , or may be distributed across several network nodes. Thus,  FIG. 2  is included merely as a descriptive expedient and does not necessarily reflect any particular physical embodiment of memory  220 . As depicted in  FIG. 2 , though, memory  220  may include additional data and programs. Of particular import to workflow program  200 , memory  220  may include workflow manager  215 , with which workflow program  200  interacts. 
     Workflow program  200  is described herein as an object-oriented program, and more particularly as an object-oriented JAVA application. JAVA provides many tools and resources that facilitate the development of distributed, modular applications, including an introspection mechanism and a vast library of classes distributed by the vendor. The significance of these tools will become apparent in the description that follows. Notwithstanding the advantages of JAVA, though, those skilled in the art will recognize that the principles and functions described below may be implemented in a variety of programming languages using a variety of programming models. 
     Workflow program  200  comprises an assembly of workflow components  205 , each of which represents any programming unit designed to coordinate or manage a convenient set of related activities that can be treated as a single unit of activity. In the embodiment described here, each workflow component  205  is implemented as an object, which is defined by a specific class, and is stored in a workflow library. Once assembled, workflow program  200  also may be stored in the workflow library, along with other workflow programs. Like workflow components  205 , workflow programs stored in the library can then be combined to produce new workflow programs. The workflow library is depicted as workflow library  225  in  FIG. 2 . 
     Each workflow component class includes properties and methods that support the operational functions of the workflow component, but also include metadata properties that provide information about the workflow component itself. These classes also may include metadata methods that provide indirect access to these metadata properties. Examples of metadata properties include, without limitation, unique identifiers, descriptors, approval flags, and checksum values. The significance of these types of metadata properties are discussed below in more detail. 
     As described herein, workflow program  200  includes class loader  210 , but those skilled in the art will appreciate that class loaders commonly are invoked from other software elements. Particularly in the JAVA environment, class loaders typically are invoked by the JAVA virtual machine. Basic class loaders merely create instances of particular classes (i.e. “objects”) at run-time, but class loaders can be customized to provide additional functions. Here, class loader  210  is a custom class loader that creates an instance of workflow component  205  as needed at run-time, and also introspects workflow component  205  to extract its metadata properties. Class loader  210  then can store the metadata properties in a memory, such as memory  220 . Class loader  210  also can track the number and type of each workflow component that it creates, and store that information in memory. 
     Finally, workflow program  200  interacts with workflow manager  215 . Workflow manager  215  analyzes the metadata properties and other data collected by class loader  210 , and provides requested status information to other programs or to an end-user. 
     The operation of workflow program  200  is illustrated in  FIG. 3  using a simple airline check-in workflow as an example. Of course, those skilled in the art will appreciate the general applicability of the principles described herein to any workflow. In this example, though, the operational workflow embodied in workflow program  200  comprises workflow components  302 - 314 , which are assembled by a workflow developer at design-time in an order that facilitates the check-in activities. For example, workflow component  302  prompts an operator to collect proper identification and enter identification data, such as the passenger&#39;s name. Workflow component  304  prompts an operator to collect and enter a credit card number from the passenger. Workflow component  306  then prompts the operator to collect reservation information from the passenger and queries the reservation database to identify the passenger&#39;s reservation. Workflow component  308  prompts an operator to collect the passenger&#39;s baggage and enter baggage data, such as the number of bags. Workflow component  310  then allocates a seat to the passenger. Workflow component  312  prints the passenger&#39;s boarding pass. Finally, workflow component  314  prints the passenger&#39;s baggage claim ticket. Each of workflow components  302 - 314  include metadata properties that describe the component&#39;s class, identify the author of the workflow component, indicate the approval status of the workflow component, and provide a checksum value for the workflow component. In the embodiment described here, workflow program  200  also includes these metadata properties. 
     An operator invokes workflow program  200  when a passenger arrives at the ticket counter or gate and requests to check-in. Many contemporary hardware and software platforms, including JAVA, support distributed processing architectures. Thus, those skilled in the art will appreciate that an operator may invoke workflow program  200  remotely over a network, such as exemplary network  100 , or locally on any workstation within the network. As  FIG. 3  illustrates, class loader  210  first creates an instance of workflow program  200  ( 316 ) and introspects workflow program  200  to extract its metadata properties ( 318 ). Optionally, class loader  210  may check the approval flag ( 320 ) to verify that workflow program  200  has been approved for enterprise use, and may validate the checksum value ( 322 ) to confirm that workflow program  200  has not been altered or tampered with since receiving approval. Class loader  210  then records the metadata properties ( 324 ) in a memory and notifies workflow manager  215  that a new instance of workflow program  200  has been created ( 326 ). Alternatively, workflow manager  215  periodically polls the memory to retrieve updated metadata properties then stops ( 328 ). Class loader  210  next creates an instance of workflow component  302  ( 330 ), and introspects this component to extract its metadata properties ( 332 ). Optionally, class loader  210  again verifies the integrity of workflow component  302  by checking its approval flag ( 334 ) and checksum value ( 336 ). And again, class loader  210  records the metadata properties ( 338 ) in memory and notifies workflow manager  215  that a new instance of workflow component  302  has been created ( 340 ), or alternatively, workflow manager  215  periodically polls the memory to retrieve updated information. Workflow component  302  then executes its check-in functions ( 342 ), which are described above then stops ( 344 ). As  FIG. 3  illustrates, workflow program  200  then invokes workflow components  304 - 314  to execute their respective check-in functions in the sequence prescribed by the workflow developer, while class loader  210  creates an instance of each workflow component, introspects each workflow component, and records each workflow component&#39;s metadata properties, as just described. 
     As class loader  210  extracts and records metadata properties, workflow manager  215  analyzes the metadata properties and produces requested workflow status information. The workflow status information can be determined and requested by an end user, or by a console program. Given certain metadata properties, such as those identified above, workflow manager  215  can identify each workflow component and enforce security policies. Much like class loader  210 , workflow manager  215  can check approval flags and checksum values to add another layer of security to workflow applications. The security enforcement responses of workflow manager  215  may include lock down of the workflow component if checksum values or approval flags do not match. Auditing and security functions of workflow manager  215  ensure congruence between the code of each workflow component as written by the programmers and the workflow metadata. Essentially, the security and auditing functions of workflow manager  215  guarantee that workflow programs execute according to the workflow requirements. 
     Metadata properties also may be used to generate documentation for the workflow components, similar to JAVADOC. The JAVADOC system, though, is used to provide documentation for programmers and generally has no relationship to documentation for operational activities. Essentially, JAVADOC or a similar program extracts information from metadata of each component and publishes the information without the end-users explicitly requesting the information directly from workflow manager  215 . JAVADOC or similar programs generate documentation independently from the code of particular workflow components, which allows for interaction to occur between multiple workflow components. For example, an audit process reviewing the airline check-in workflow mentioned above can identify that passenger John Doe currently at the ticket counter has a membership in the airline&#39;s reward program. The audit process can then initiate a workflow component offering an option to upgrade to first class for free and issue an approval flag allowing for the free upgrade. In this example, the documented metadata allowed an interaction between two separate workflow components. 
     A preferred form of the invention has been shown in the drawings and described above, but variations in the preferred form will be apparent to those skilled in the art. The preceding description is for illustration purposes only, and the invention should not be construed as limited to the specific form shown and described. The scope of the invention should be limited only by the language of the following claims.