added lambda example for Neptune

Author: scmacdon

.doc_gen/cross-content/cross_Neptune_Java_block.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "file://zonbook/docbookx.dtd"[
+        <!ENTITY % phrases-shared SYSTEM "file://AWSShared/common/phrases-shared.ent">
+        %phrases-shared;
+        ]>
+<block>
+    <para>
+        Shows how to use &neptune; Java API to create a Lambda function that queries graph data within the VPC.
+    </para>
+    <para>
+        For complete source code and instructions on how to set up and run, see the full example on
+        <ulink url="https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/usecases/creating_neptune_lambda">GitHub</ulink>.
+    </para>
+</block>

.doc_gen/metadata/cross_metadata.yaml

@@ -1,4 +1,17 @@
 # zexi 0.4.0
+cross_Neptune_Query:
+  title: Use the &neptune; API to develop an &LAM; function that queries graph data
+  title_abbrev: Use the &neptune; API to query graph data
+  synopsis: create lambda functions that query graph data.
+  category: Scenarios
+  languages:
+    .Java:
+      versions:
+        - sdk_version: 2
+          block_content: cross_Neptune_Java_block.xml
+  service_main: neptune
+  services:
+    lambda:
 cross_MessageProcessingFrameworkTutorial:
   title: Use the &AWS; Message Processing Framework for .NET to publish and receive &SQS; messages
   title_abbrev: Use the &AWS; Message Processing Framework for .NET with &SQS;

javav2/example_code/neptune/src/main/java/com/example/neptune/analytics/NeptuneAnalyticsQueryExample.java

@@ -3,12 +3,10 @@
 
 package com.example.neptune.analytics;
 
-import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
 import software.amazon.awssdk.core.ResponseInputStream;
 import software.amazon.awssdk.core.client.config.ClientOverrideConfiguration;
 import software.amazon.awssdk.http.apache.ApacheHttpClient;
 import software.amazon.awssdk.regions.Region;
-import software.amazon.awssdk.services.neptunedata.NeptunedataClient;
 import software.amazon.awssdk.services.neptunegraph.NeptuneGraphClient;
 import software.amazon.awssdk.services.neptunegraph.model.ExecuteQueryRequest;
 import software.amazon.awssdk.services.neptunegraph.model.ExecuteQueryResponse;

javav2/example_code/neptune/src/main/java/com/example/neptune/data/OpenCypherExplainExample.java

@@ -10,7 +10,6 @@
 import software.amazon.awssdk.services.neptunedata.model.ExecuteOpenCypherExplainQueryRequest;
 import software.amazon.awssdk.services.neptunedata.model.ExecuteOpenCypherExplainQueryResponse;
 import software.amazon.awssdk.services.neptunedata.model.NeptunedataException;
-
 import java.net.URI;
 import java.time.Duration;