jdec | Java library that offers a unified interface | Rule Engine library

 by   materna-se Java Version: 2.9.15 License: Apache-2.0

kandi X-RAY | jdec Summary

kandi X-RAY | jdec Summary

jdec is a Java library typically used in Server, Rule Engine applications. jdec has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub, Maven.

jDEC is a Java library designed to provide a unified interface for executing decisions. The decisions can be modeled with DMN (Decision Model and Notation) or with Java.

            kandi-support Support

              jdec has a low active ecosystem.
              It has 4 star(s) with 0 fork(s). There are 6 watchers for this library.
              There were 1 major release(s) in the last 6 months.
              jdec has no issues reported. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of jdec is 2.9.15

            kandi-Quality Quality

              jdec has no bugs reported.

            kandi-Security Security

              jdec has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              jdec is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              jdec releases are not available. You will need to build from source code and install.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed jdec and discovered the below as its top functions. This is intended to give you an instant insight into jdec implemented functionality, and help decide if they suit your requirements.
            • Get the input structure for the given namespace
            • Get the complex input structure
            • Get the input structure for a DMN type
            • Retrieves input structure for a given decision service
            • Convert options to allowable values
            • Evaluate the expression
            • Convert the input value to BigDecimal
            • Convert the output to the output
            • Execute a FEEL expression
            • Removes all functions
            • Evaluate an expression and return the result
            • Converts a context object into a map
            • Fetch data from the given options
            • Performs a POST request against a given namespace
            • Delete model for given namespace
            Get all kandi verified functions for this library.

            jdec Key Features

            No Key Features are available at this moment for jdec.

            jdec Examples and Code Snippets

            No Code Snippets are available at this moment for jdec.

            Community Discussions


            How to calculate asserts with 2 same parameters in CLIPS?
            Asked 2022-Apr-10 at 18:30

            I am new of CLIPS. I would like to calculate the average of asserts with two same parameters. For example, if i have this template:



            Answered 2022-Apr-10 at 18:30

            You need to construct something to hold all of the firstname/course combinations that you want to generate averages for. In the actions of the rule you'd have to iterate over the quiz facts and generate one multifield variable containing ("Mike" "Ronald" "Lionel") and another containing ("Math" "Math" "English"). Then you'd have to iterate these lists using the indices from 1 to the length of the lists and then use the nth$ function to pull out the name and the course from each list. Then you could use the fact query functions to pull out the averages for each name/course and compute the total average.

            Rather than do all that, you could write a rule which determines all of the name/course for which an average is needed and assert that as a fact:

            Source https://stackoverflow.com/questions/71816233


            CLIPS: Clear-window in CLIPSDOS.exe and tab to indent in CLIPSIDE
            Asked 2022-Feb-19 at 20:02

            With CLIPS, It's possible some of the following?? (V 6.4 for Windows)

            1 - Use a command like (clear-window) in the CLIPSDOS console for clear the console.
            2 - Use tabs for indentation in CLIPSIDE. When i press tab, cursor goes to File menu item... how to indent?

            How do people learn programming with CLIPS? I'm using a plugin for Visual Studio that helps me with the parenthesis concordance, let me use tabs to indent, and other tricks. But it has some problems, and i'm quite worried about the usability of the CLIPSDOS and CLIPSIDE interfaces to this purpose.

            Thanks in advance.



            Answered 2022-Feb-19 at 20:02

            In CLIPSDOS, you can use the command (system cls) to clear the screen. This will simply call out to DOS to execute a cls command.

            The IDEs use standard text editing classes for the CLIPS command prompt window. Tabs appear to work correctly on the macOS IDE, but not the Windows or Java Swing IDEs, so that will need to be corrected.

            While you can directly enter constructs at the command prompt, it's better to edit them in a file with your preferred text editor and then use the load command from the command prompt to load the contents of that file. The IDE supports a command history so you can use the up/down arrow keys to cycle through prior commands to avoid retyping.

            Source https://stackoverflow.com/questions/71182885


            Can a rules file have a dependency on other rules?
            Asked 2022-Feb-09 at 08:07

            I'm using drools rules engine for my new service. I'm looking at cleaning up the rules / making it easier to write. I was hoping to use a rules framework style of coding. I.e. I want a rules file who's sole purpose is to validate the input data (i.e. input list isn't null and contains a specific value). Then when I write new rules files I can just say import this and run the validation before all other rules.

            Also, I know I can load multiple rules file into the KieSession. Is it possible to tell it which order to run the rules files in, or which files to skip for each use case? The idea behind this is for performance. Let's say I load up an AWS lambda function with the rules service, I want to have all rules loaded already and have it run the specific one for the use case, instead of loading up a rules file for each call.

            Thanks for the help.



            Answered 2021-Dec-15 at 20:31

            You asked

            Is it possible to tell it which order to run the rules files in, or which files to skip for each use case?

            The answer is yes. The method to do this is called salience. The linked article is a good source to learn about this. This is important because salience can make it possible to change the order of execution of rules.

            Hypothetically, let say that you have a program that process transactions based on categories. So, if category == deposit, you want to add to current balance. You have another rule that if category == withdrawal you want to subtract from current balance. BUT, you want to process deposits over withdrawals. Using salience you can guarantee that the deposits rule will fire before the withdrawal rule regardless of order of transaction.

            Dependency is kind of related, but not the same. In drools, this is know as Forward or Backward Chaining depending on the order. This is all composed based on a series of facts. For example, if I was to ask a system "is my house on planet Earth?" the conclusion is reached if the following facts exist:

            1. My house is in Fort Worth
            2. Fort Worth is a city in Texas
            3. Texas is a state in the United States
            4. United States is a country on Earth

            A direct fact linking the house location to this planet is asserted based on the rules that verify the enumerated facts above. This is done using chaining. Forward or backwards is just how these are processed (top-down or bottom-up). This is in a nutshell to the best of my recollection.

            Source https://stackoverflow.com/questions/70369550


            Drools: When using JPAWorkingMemoryDbLogger, the processInstanceId is always 1
            Asked 2021-Dec-17 at 09:58

            We've been executing a JBPM decision tree in memory for our call center. This works great, but we'd really like to be able to render diagrams in our BusinessCentral instance. This means we have to add JPAWorkingMemoryDbLogger so it logs stuff out to the drools tables. We're not using kie-server to execute our JBPM, but executing it in the follow code.

            What we're finding is that every process instance id is 1, whereas other things JBPM we execute via kie-server manage to get an incremented PID.

            What do we need to change in the setup of the KieSession so it it increments the process instance id?



            Answered 2021-Dec-17 at 09:58


            Problem with pattern matching in Drools 7.57.0.Final
            Asked 2021-Nov-19 at 20:57

            I'm trying to run this GitHub project using Drools 7.57.0.Final instead of 7.39.0.Final which was used in original project. And I found some issues. The issue that most triggers me is the one in the Section 6, Step 5. The problem lies in the Drools file VisaApplicationValidationWithAgendaAndSalience.drl. Here is the content with the "debug" statement that I have added:



            Answered 2021-Nov-19 at 20:57

            Congratulation, you found drools bug DROOLS-6542 - fixed in 7.60.0.Final
            There is a workaround - remove mvel dialect for the rule "Invalidate visa application with invalid passport".

            BTW, I'd like to propose you drools testing library which may save you great amount of time to mind complicated rules and simplify writing test scenarios. Here is how test may look like.

            Source https://stackoverflow.com/questions/68625889


            Create new Map in drools file on the fly
            Asked 2021-Sep-17 at 22:03

            Awarding the students based on few rules. Here each student is eligible for multiple rewards like student with marks 80 is eligible for both award_65 and award_75. So after evaluating the result I want a list of awards a student is eligible for..
            This use-case is bit unrealistic, but I tried to put an analogy to my problem (couldn't post as it contains sensitive information).
            Inputs to drools would be returned by following method: and these returned list of objects would be the facts to drools.



            Answered 2021-Sep-17 at 22:03

            You're kind of going about this in a funny way. Part of the reason your rules don't work is because you're trying to put consequences into the conditional section.

            We can break down your problem into the following.


            • a Student, who has a status and marks.

            Rule 1:

            • When status = active and marks > 65, a student is eligible for Award65.

            Rule 2:

            • When status = active and marks > 75, a student is eligible for Award75.

            This is pretty straight forward.

            So far, our rules will look like this:

            Source https://stackoverflow.com/questions/69228792


            Karate Framework as a Rules Engine
            Asked 2021-Aug-11 at 07:33

            I have an api project which requires the payload to be validated against a set of rules. For this, I have written a karate feature file with all the required assertions for my incoming request json payload. The feature file then returns true or false depending upon the satisfied conditions. This mechanism is working perfectly in my local currently.

            Is this approach recommended for production use case? Will the karate framework in this format be capable of handling large volumes of requests coming in a very short span of time?



            Answered 2021-Aug-11 at 07:33

            Developer of Karate here, I really like your question because it validates what I personally believe, that Karate just makes it easy to work with JSON.

            Why I won't recommend this for production use is because Karate embeds a JS engine that can be targeted using a "script injection" attack. Karate is designed for users running "locally" and has no safeguards built-in to prevent any malicious attacks coming in via JSON payloads.

            The other question is performance, personally I am quite confident, because Karate is being used in conjunction with Gatling and some work has gone into improving performance over the years. But at the end of the day, Karate does use a JS engine in interpreted mode. So you need to run a performance test or load test yourself to validate if Karate can handle the volume you expect.

            Maybe you can contribute to Karate to address both the above concerns !

            Source https://stackoverflow.com/questions/68736960


            Attempting simple proof of concept of microsoft / RulesEngine but getting JsonSerializationException
            Asked 2021-Jun-20 at 06:59

            I'm assuming I've made a stupid mistake here, but wondering if someone could assist?

            I am trying out the following library:



            Answered 2021-Jun-20 at 06:59

            The expectation for the RulesEngine(string[], ILogger, ReSettings) constructor is that each element of the string array is a complete JSON object. In your case, you've provided just a single line per array element.

            Given that your text file already contains a collection of rules, you should deserialize it yourself, and pass the deserialized collection into the constructor accepting a WorkflowRules[]:

            Source https://stackoverflow.com/questions/68053336


            how to prevent drools engine looping on entry point data
            Asked 2021-May-16 at 07:25

            I'm using drools to raise alarm on streaming transaction data. The drools engine is STREAM and ACTIVE mode. I also use an entry point (OM-TRANS) to transmit data to the rule engine. I have written a simple rule to test the behaviour of the engine. I got some results but i don't understand them and their are not what i expect.

            This is the first simple rule:



            Answered 2021-May-16 at 07:25

            Because your events expire only in 24h, older ones do participate in the rule logic.
            Usually this can be fixed with sliding length window

            Source https://stackoverflow.com/questions/67538603


            How do I remove a published Azure CDN Rules Engine
            Asked 2021-May-05 at 08:04

            I published a rule created by rules engine and it got deployed. But how do I remove / cancel the policy or delete it ? I no longer need it as its causing continues redirect and my service is not accessible. Note that I am using Premium Verizon pricing tier



            Answered 2021-May-05 at 08:04

            According to the documentation

            Only a single policy per environment may be active at any given time.

            You don't really remove it, you just overwrite it. You can create a new draft, lock it, and deploy it on top of the existing one.

            Also note that you can't have an empty policy.

            Source https://stackoverflow.com/questions/66169283

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install jdec

            You can download it from GitHub, Maven.
            You can use jdec like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the jdec component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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