Examples with GroovyExpression com.hortonworks.streamline.streams.runtime.rule.condition.expression.GroovyExpression used on opensource projects

Example 1 with GroovyExpression

use of com.hortonworks.streamline.streams.runtime.rule.condition.expression.GroovyExpression in project streamline by hortonworks.

the class RuleProcessorRuntime method createGroovyScript.

private Script createGroovyScript(Rule rule) {
    LOG.info("Creating groovy execution script for rule {} ", rule);
    GroovyExpression groovyExpression = new GroovyExpression(rule.getCondition());
    GroovyScriptEngine groovyScriptEngine = new GroovyScriptEngine();
    GroovyScript<Boolean> groovyScript = createHelperGroovyScript(groovyExpression, groovyScriptEngine);
    GroovyScript<Collection<StreamlineEvent>> wrapper = new GroovyScript<Collection<StreamlineEvent>>(groovyExpression.asString(), groovyScriptEngine) {

        @Override
        public Collection<StreamlineEvent> evaluate(StreamlineEvent event) throws ScriptException {
            if (groovyScript.evaluate(event)) {
                return Collections.singletonList(event);
            } else {
                return Collections.emptyList();
            }
        }
    };
    return wrapper;
}