Added Lambda environment variable

Author: alfonsof

awslambdas3move/README.md

@@ -19,7 +19,7 @@ It handles an AWS Lambda function that moves an object when it appears in a S3 b
 
 ## Using the code
 
-* You can select the destination bucket name changing the value of `DESTINATION_BUCKET` variable in the code.
+* You can select the destination bucket name using an AWS Lambda environment variable: `TARGET_BUCKET`
 
 * Access the AWS console.
 
@@ -105,6 +105,8 @@ It handles an AWS Lambda function that moves an object when it appears in a S3 b
     * Memory (MB): `1024`
     * Timeout: `10 sec`
 
+* Create the AWS Lambda environment variable `TARGET_BUCKET` and set its value to the name of your target bucket.
+
 * Upload the Java JAR file.
 
   Artifact:

awslambdas3move/src/main/java/example/S3MoveHandler.java

@@ -20,8 +20,6 @@
 
 public class S3MoveHandler implements RequestHandler<S3Event, String> {
 
-    private static final String DESTINATION_BUCKET        = "targetbucket10";      // Destination bucket name
-
     public String handleRequest(S3Event s3Event, Context context) {
         String sourceBucketName;              // Source bucket name
         String sourceKeyName;                 // Source key name
@@ -40,7 +38,12 @@ public String handleRequest(S3Event s3Event, Context context) {
         sourceKeyName = record.getS3().getObject().getKey(); // Name doesn't contain any special characters
 
         // Destination Bucket Name
-        destinationBucketName = DESTINATION_BUCKET;
+        destinationBucketName = System.getenv("TARGET_BUCKET");
+
+        if (destinationBucketName == null || destinationBucketName.isEmpty()) {
+            logger.log("Error: TARGET_BUCKET Lambda environment variable does not exist!!");
+            System.exit(1);
+        }
 
         // Destination File Name
         destinationKeyName = sourceKeyName;