Address @msailes, @mwunderl comments

Author: yualexan

sample-apps/blank-java/README.md

@@ -14,6 +14,7 @@ The project source includes function code and supporting resources:
 Use the following instructions to deploy the sample application.
 
 # Requirements
+- An AWS account.
 - [Java 8 runtime environment (SE JRE)](https://www.oracle.com/java/technologies/javase-downloads.html)
 - [Gradle 5](https://gradle.org/releases/) or [Maven 3](https://maven.apache.org/docs/history.html)
 - The Bash shell. For Linux and macOS, this is included by default. In Windows 10, you can install the [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install-win10) to get a Windows-integrated version of Ubuntu and Bash.

sample-apps/blank-java/src/main/java/example/Handler.java

@@ -8,8 +8,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import software.amazon.awssdk.core.SdkSystemSetting;
-import software.amazon.awssdk.regions.Region;
 import software.amazon.awssdk.services.lambda.LambdaClient;
 import software.amazon.awssdk.services.lambda.model.GetAccountSettingsResponse;
 import software.amazon.awssdk.services.lambda.model.LambdaException;
@@ -18,18 +16,14 @@
 public class Handler implements RequestHandler<Map<String,String>, String> {
 
     private static final Logger logger = LoggerFactory.getLogger(Handler.class);
-    private static final LambdaClient lambdaClient = LambdaClient.builder()
-        .region(Region.of(System.getenv(SdkSystemSetting.AWS_REGION.environmentVariable())))
-        .build();
+    private static final LambdaClient lambdaClient = LambdaClient.builder().build();
 
     @Override
     public String handleRequest(Map<String,String> event, Context context) {
-        
-        // log execution details
+
         logger.info("ENVIRONMENT VARIABLES: " + System.getenv());
         logger.info("EVENT: " + event);
 
-        // process event
         GetAccountSettingsResponse response = null;
         try {
             response = lambdaClient.getAccountSettings();

sample-apps/java-basic/src/main/java/example/Handler.java

@@ -7,19 +7,15 @@
 import java.util.Map;
 
 // Handler value: example.Handler
-public class Handler implements RequestHandler<Map<String,String>, String>{
+public class Handler implements RequestHandler<Map<String,String>, Void>{
 
   @Override
-  public String handleRequest(Map<String,String> event, Context context)
+  public Void handleRequest(Map<String,String> event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    String response = "200 OK";
-    // log execution details
     logger.log("ENVIRONMENT VARIABLES: " + System.getenv());
-
-    // process event
     logger.log("EVENT: " + event);
     logger.log("EVENT TYPE: " + event.getClass());
-    return response;
+    return null;
   }
 }

sample-apps/java-basic/src/main/java/example/HandlerDivide.java

@@ -13,15 +13,14 @@ public class HandlerDivide implements RequestHandler<List<Integer>, Integer>{
   public Integer handleRequest(List<Integer> event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    // process event
     if ( event.size() != 2 )
     {
       throw new InputLengthException("Input must be an array that contains 2 numbers.");
     }
     int numerator = event.get(0);
     int denominator = event.get(1);
-    logger.log("EVENT: " + event);
-    logger.log("EVENT TYPE: " + event.getClass().toString());
+    logger.log("EVENT: Numerator is " + event.get(0).toString() +
+      "; Denominator is " + event.get(1).toString());
     return numerator/denominator;
   }
 }

sample-apps/java-basic/src/main/java/example/HandlerInteger.java

@@ -11,10 +11,8 @@ public class HandlerInteger implements RequestHandler<Integer, Integer>{
   public Integer handleRequest(Integer event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    // process event
     logger.log("EVENT: " + event);
     logger.log("EVENT TYPE: " + event.getClass().toString());
-    // return amount of time remaining before timeout
     return context.getRemainingTimeInMillis();
   }
 }

sample-apps/java-basic/src/main/java/example/HandlerList.java

@@ -13,7 +13,6 @@ public class HandlerList implements RequestHandler<List<Integer>, Integer>{
   public Integer handleRequest(List<Integer> event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    // process event
     logger.log("EVENT: " + event);
     logger.log("EVENT TYPE: " + event.getClass().toString());
     return context.getRemainingTimeInMillis() ;

sample-apps/java-basic/src/main/java/example/HandlerString.java

@@ -11,7 +11,6 @@ public class HandlerString implements RequestHandler<String, Integer>{
   public Integer handleRequest(String event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    // process event
     logger.log("EVENT: " + event);
     logger.log("EVENT TYPE: " + event.getClass().toString());
     return context.getRemainingTimeInMillis();

sample-apps/java-basic/src/main/java/example/HandlerWeatherData.java

@@ -11,11 +11,8 @@ public class HandlerWeatherData implements RequestHandler<WeatherData, WeatherDa
   public WeatherData handleRequest(WeatherData event, Context context)
   {
     LambdaLogger logger = context.getLogger();
-    // log execution details
     logger.log("EVENT: " + event);
     logger.log("EVENT TYPE: " + event.getClass().toString());
-
-    // // process event
     return event;
   }
 }

sample-apps/java-events/src/main/java/example/HandlerSQS.java

@@ -14,7 +14,6 @@ public class HandlerSQS implements RequestHandler<SQSEvent, Void>{
   @Override
   public Void handleRequest(SQSEvent event, Context context)
   {
-    // process event
     for(SQSMessage msg : event.getRecords()){
       logger.info(msg.getBody());
     }