https://community.cloudera.com/t5/Support-Questions/Nifi-Groovy-doesn-t-accept-lambdas/m-p/230221#M192071 <P>IIRC, Groovy 3 is supposed to support the Java lambda syntax, but NiFi uses Groovy 2 which does not support it. However Groovy has always had <A target="_blank" href="http://groovy-lang.org/closures.html">Closures</A>, which are very similar and used for the same purpose, so despite a small difference in syntax, you should be able to use Groovy closures the same as you would use Java lambdas. If you are referring to the Java Streams API (things like foreach() that take a lambda), Groovy has iterative and aggregate functions for that too, such as <A target="_blank" href="http://mrhaki.blogspot.com/2009/09/groovy-goodness-looping-in-different.html">each() and eachWithIndex()</A>, <A target="_blank" href="http://mrhaki.blogspot.com/2010/01/groovy-goodness-apply-method-to-all.html">spread-dot and collect()</A>, etc.</P> Wed, 18 Oct 2017 20:02:28 GMT mburgess 2017-10-18T20:02:28Z https://community.cloudera.com/t5/Support-Questions/Nifi-Groovy-doesn-t-accept-lambdas/m-p/230220#M192070 <P>I want to know if nifi 1.3.0 version contains groovy version in which i can use lambdas?.</P> Wed, 18 Oct 2017 19:46:37 GMT https://community.cloudera.com/t5/Support-Questions/Nifi-Groovy-doesn-t-accept-lambdas/m-p/230220#M192070 salome_tkhilais 2017-10-18T19:46:37Z https://community.cloudera.com/t5/Support-Questions/Nifi-Groovy-doesn-t-accept-lambdas/m-p/230221#M192071 <P>IIRC, Groovy 3 is supposed to support the Java lambda syntax, but NiFi uses Groovy 2 which does not support it. However Groovy has always had <A target="_blank" href="http://groovy-lang.org/closures.html">Closures</A>, which are very similar and used for the same purpose, so despite a small difference in syntax, you should be able to use Groovy closures the same as you would use Java lambdas. If you are referring to the Java Streams API (things like foreach() that take a lambda), Groovy has iterative and aggregate functions for that too, such as <A target="_blank" href="http://mrhaki.blogspot.com/2009/09/groovy-goodness-looping-in-different.html">each() and eachWithIndex()</A>, <A target="_blank" href="http://mrhaki.blogspot.com/2010/01/groovy-goodness-apply-method-to-all.html">spread-dot and collect()</A>, etc.</P> Wed, 18 Oct 2017 20:02:28 GMT https://community.cloudera.com/t5/Support-Questions/Nifi-Groovy-doesn-t-accept-lambdas/m-p/230221#M192071 mburgess 2017-10-18T20:02:28Z