DynamoDB PutItemOutcome#getPutItemResult() returns empty object - scala

Question

I'm trying to run the following example from AWS Dynamo tutorial locally, Step 3: Put, Update, and Delete an Item.
In my case, it is:
val client: AmazonDynamoDBClient = new AmazonDynamoDBClient().withEndpoint("http://localhost:7777")
val dynamoDB: DynamoDB = new DynamoDB(client)
val table: Table = dynamoDB.getTable("Catalog")
try {
val rating: java.util.List[Float] = new java.util.LinkedList[Float]()
rating.add(1)
val newItem: Item = new Item().withPrimaryKey("Title", "Title here").withInt("Country", 1).
withList("Ratings", rating)
val outcome: PutItemOutcome = table.putItem(newItem)
System.out.println("PutItem succeeded:\n" + outcome.getPutItemResult)
} catch {
case exception: Exception => System.out.println(exception.getMessage)
}
The output is:
PutItem succeeded: {}
While in local DynamoDB console:
var params = {
TableName: "Catalog",
Key: {
"Title":"Title Here",
}
};
docClient.get(params, function(err, data) {
if (err)
console.log(JSON.stringify(err, null, 2));
else
console.log(JSON.stringify(data, null, 2));
});
Output:
{
"Item": {
"Title": "Title Here",
"Ratings": [
1
],
"Country": 1
}
}

Answer 1

You need to set ReturnValues to ALL_OLD in the PutItem request to get a value returned, but even then it will only have the values that were replaced.
http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_PutItem.html#DDB-PutItem-request-ReturnValues
With your code you'd need to do something like replace
val outcome: PutItemOutcome = table.putItem(newItem)
with
val putItemSpec: PutItemSpec = new PutItemSpec()
.withItem(newItem)
.withReturnValues(ReturnValue.ALL_OLD)
val outcome: PutItemOutcome = table.putItem(putItemSpec)