sigv4.groovy

:install com.amazonaws amazon-neptune-sigv4-signer 2.1.1
:install com.amazonaws aws-java-sdk-core 1.11.748

// above lines only need to be executed once to get the dependencies into the console

import com.amazonaws.auth.DefaultAWSCredentialsProviderChain
import com.amazonaws.neptune.auth.NeptuneNettyHttpSigV4Signer
System.setProperty("aws.accessKeyId","<access-key>")
System.setProperty("aws.secretKey","<secret-key>")
cluster = Cluster.build("<cluster>").
          enableSsl(true).keyCertChainFile("SFSRootCAG2.pem"). 
          handshakeInterceptor{ r -> 
              def sigV4Signer = new NeptuneNettyHttpSigV4Signer("<region>", new DefaultAWSCredentialsProviderChain())
              sigV4Signer.signRequest(r)
              return r
          }.create()
client = cluster.connect()
client.submit("g.V().has('code','IAD')").all().get()
cluster.close()