Using decision within a java delegate

Question

I am trying to evaluate a decision inside a camunda java delegate that I created. Following is the code that I am using. Upon executing the delegate( which runs fine without the DMN part), I get an error stating:

java.lang.NoClassDefFoundError: de/odysseus/el/util/SimpleContext"

I am using gradle and have added the following to my .build : compile 'org.camunda.bpm.dmn:camunda-engine-dmn' , 'org.camunda.bpm.dmn:camunda-engine-feel-juel:7.5.0-alpha2' , 'de.odysseus.juel:juel-spi:2.2.7', 'de.odysseus.juel:juel-api:2.2.7' , 'de.odysseus.juel:juel-impl:2.2.7'

Any suggestion how can I fix this error up? Thanks.

DMN Code:

DmnEngine dmnEngine = DmnEngineConfiguration.createDefaultDmnEngineConfiguration().buildEngine();

// read the DMN XML file as input stream
InputStream inputStream = CheckDatafileExistsExecutor.class.getResourceAsStream("decision1.xml");

// parse the DMN decision from the input stream
DmnDecision decision = dmnEngine.parseDecision("Decision_13nychf", inputStream);

//accessing the input variables
VariableMap variables = Variables.fromMap((Map<String, Object>) decision);

// evaluate the decision table with the input variables
DmnDecisionTableResult result = dmnEngine.evaluateDecisionTable(decision, variables);

int size = result.size();
DmnDecisionRuleResult ruleResult = result.get(0);

The actual camunda bpm version ist 7.6.0. Why do you add de.odysseus.juel? — jklee
– jklee, Commented Mar 22, 2017 at 12:00
I added the because of this post : groups.google.com/forum/#!searchin/camunda-bpm-users/… — Droy
– Droy, Commented Mar 22, 2017 at 16:58
sorry, here it is : groups.google.com/forum/#!topic/camunda-bpm-users/Z2bKes3nIA0 — Droy
– Droy, Commented Mar 23, 2017 at 0:36

jklee · Accepted Answer · 2017-03-23 06:15:07Z

2

Remove all your dependencies and add only compile group: 'org.camunda.bpm.dmn', name: 'camunda-engine-dmn', version: '7.6.0'

You can try also menskis example, but change the camunda-engine-dmn to 7.6.0 and

DmnDecisionTableResult results = dmnEngine.evaluateDecisionTable("decision", "Example.dmn", variables);

to

    InputStream fileAsStream = IoUtil.fileAsStream("Example.dmn");
    DmnDecisionTableResult results = dmnEngine.evaluateDecisionTable("decision", fileAsStream, variables);

answered Mar 23, 2017 at 6:15

jklee

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Comments

Prashant · Accepted Answer · 2022-04-08 10:31:25Z

0

You can use delegate service for decision evaluation based on key or Id,

eg:-

public void execute(DelegateExecution delegateExecution) throws Exception{ DecisionService decisionService = delegateExecution.getProcessEngineServices().getDecisionService(); decisionService.evaluateDecisionByKey(dmnToInvoke).variables(delegateExecution.get Variables()).evaluate(); }

answered Apr 8, 2022 at 10:31

Prashant

1

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