JBoss Recipe of the Day. The first transition represents the otherwise branch. Refer to the Developer Guide for advanced, yet unsupported, email settings. Custom action example 4. The classic version of eclipse will not be sufficient as it does not have an XML editor. Completing the task will bring the process execution to the next task, which is calculate quote.
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Database The first part of this tutorial needs a database, because we want to retrieve historical information out of it.
This includes calculating the standard deviation, which can be done by most of the databases today see Howto enable MySQL standard deviation calculation in Hibernate. Unfortunately, some of the database queries made trouble with the standard hibernate HQL. I work on an optimized version for Oracle and a database independent one, which will be slower. The business process In this tutorial we will look at an easy business process: The handling of returned goods from customers. Think about a webshop for technical stuff, where the customers can send back the goods they ordered within two weeks without any reasons at least in Germany or within the warranty, if there is a defect.
Typically, the goods are checked from the webshop team, if they are really broken. If the defect cannot even be approved with that test, the stuff is send back to the customer, it may not be broken. There is one additional requirement if the customer returns his shopping within two weeks again: at least in Germany : The shipping costs must be paid for him. A good idea is also to check the sources for the tutorial which are available via CVS in jbpm 3 HEAD, because there will be ongoing development in the area of the simulation.
This is not a part of the simulation, but produces a faked history for us. Normally the historical data is automatically written when people use your application, where the process is deployed into. After creating the historical data, we can use the org. GetSimulationInputCommand to retrieve statistics about it. The command simply calculate the statistical figures and returns a BamSimulationProposal. Because of the poor algorithm of generating the data, its value is limited. Transferring costs by the accountant for example, should always take duration close to the average.
The big standard deviation is not realistic here, it would only make for tasks, which processing times differs a lot from case to case, a good example can be the extended technical test. For this tutorial I have changed the above figures slightly, mainly to make them a bit easier to read.
For a better overview I added the important numbers into the process diagram: Simulation Use Case 1: Discover staffing strategy Okay, the process runs and does the job well.
As the year move closer to Christmas, your manager starts to think about staffing strategies. Because of the sales we have we can forecast the number of returns. Seems to be an easy question, or? The more critical my process, the closer I should go with my staffing strategy towards the worst case scenario to add safety.
Leverage simulation Totally missing at the moment are dynamic phenomena, which may build up some additional delay. But image more complex scenarios with different processes running in parallel consuming the same resources.
There it gets quite hard to calculate it without simulation. And on the other hand: using the simulation tool is not really more complicated than the spreadsheet calculcation. In fact, if it is integrated in your out-of-the-box jBPM environment it gets even easier to use! The XML configuration for the basic scenario was copied from the output of the above shown historical data retrieval tool like mentioned above, I changed the figures a bit to make them easier and more realistic.
The scenario XML matches with the figures of the spreadsheet calculation. Abstract means, that the execute attribute of a scenarion can be set to false, then the scenario is not simulated.
And this scenario can be used as a basis for other scenarios the whole configuration of the base scenario is read first, and can be overwritten in the scenario itself. Again I want to add that this example is not complicated enough to demonstrate the full power of simulation over spreadsheet calculation for this use case. One word to the statistical distributions: I used the Erlang distribution for the time between start events and normal distributions for processing times. I will not got into detail here, but see it as a good default.
In your simulation projects you may want to use different distributions, which is not a problem, because the jBPM simulation supports more than these two. You should take into account, that we ignored a warmup period in our experiment, so the system is underutilized at the beginning.
So this is not included in the cost calculation. This can make sense, if the people can do other work in that time, normally the factor should be higher at least because of set-up times for differnt types of work. Here you can look at the reports, generated during the simulation run. First the comparison:.
JBPM JPDL TUTORIAL PDF
A business process allows you to model your business goals by describing the steps that need to be executed to achieve that goal and the order, using a flow chart. This greatly improves the visibility and agility of your business logic, results in higher-level and domain-specific representations that can be understood by business users and is easier to monitor. The core of jBPM is a light-weight, extensible workflow engine written in pure Java that allows you to execute business processes using the latest BPMN 2. It can run in any Java environment, embedded in your application or as a service. Pluggable human task service based on WS-HumanTask for including tasks that need to be performed by human actors. Management console supporting process instance management, task lists and task form management, and reporting.
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Mirn The personal task list This is typically done through a form. When a named process archive gets deployed, the deployer will assign a version number. Configuration Customizing factories Configuration properties Other configuration files Hibernate cfg xml file Hibernate queries configuration file Node types configuration file Action types configuration file Business calendar configuration file Variable mapping configuration file Converter configuration file Default modules configuration file Process archive parsers configuration file Logging of optimistic concurrency exceptions Object factory 6. Default modules configuration file 6. This section shows how to define a user jb;m for your workspace that is a placeholder for the jBPM library as well as its dependencies.