[jboss-jira] [JBoss JIRA] Created: (JBRULES-2017) Custom exception handler for condition evaluator
Custom exception handler for condition evaluator
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Key: JBRULES-2017
URL: https://jira.jboss.org/jira/browse/JBRULES-2017
Project: JBoss Drools
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Components: drools-core
Affects Versions: 5.0.0.CR1, 5.0.0.M5
Reporter: Sergej Iljin
Assignee: Mark Proctor
Priority: Critical
Fix For: 5.0.0.GA
Custom exception handler for condition evaluator.
Its proposed to introduce custom exception handler for condition evaluator becaue
"always re-trow" approach is not appropriate for some cases when fail-safe rule
execution is necessary.
There is an requirment which can't be satisfied with current implementation of
condition evaluator: "All rules that are present in agenda should be performed fail
safe and independed".
So it means that if there are 2 rules and one of them throws a NullPointer exception while
condition evaluation (because of wrong configuration) the second rule have to be
performed.
Changes have to be applied to following class:
drools-core\src\main\java\org\drools\rule\EvalCondition.java
in method:
public boolean isAllowed(final Tuple tuple,
final WorkingMemory workingMemory,
final Object context) {
try {
return this.expression.evaluate( tuple,
this.requiredDeclarations,
workingMemory,
context );
} catch ( final Exception e ) {
throw new RuntimeDroolsException( this.getEvalExpression() + " : " +
e,
e );
}
}
should be replaced with somethig like this
public boolean isAllowed(final Tuple tuple,
final WorkingMemory workingMemory,
final Object context) {
try {
return this.expression.evaluate( tuple,
this.requiredDeclarations,
workingMemory,
context );
} catch ( final Exception e ) {
getExceptionHandler().handle(e);
}
}
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