Tools and Libraries of AWS DynamoDB - DynamoDB Applied Design Patterns - page 74

In the following function, we will try to put two items ( item1 and item2 , each of type
Map<String, AttributeValue> ) into the table (whose name is taken as an input
parameter). As we discussed earlier (the getTableKeySchema method), every item
must have primary key attributes ( BookTitle and Author attributes). So both the
items have these two attributes.
In the first item ( item1 ), including primary key attributes, we are adding four more at-
tributes, namely Publisher ( String type), PubDate ( String type), Language
( StringSet type), and Edition ( Number type). In order to add the attributes we
must call the correct method of the AttributeValue class, depending on the type of
attribute we need to put.
In the second item ( item2 ), we also add the same attributes for another topic, with the
additional attribute named Pages ( Number type).
private static void putItems(String tableName) {
Map<String, AttributeValue> item1 = new HashMap<String,
AttributeValue>();
item1.put("BookTitle", new
AttributeValue().withS("SCJP"));
item1.put("Author", new AttributeValue().withS("Kathy"));
item1.put("Publisher", new AttributeValue().withS("TMH"));
item1.put("PubDate", new
AttributeValue().withS("28-Dec-09"));
item1.put("Language", new AttributeValue()
.withSS(Arrays.asList("English", "German")));
item1.put("Edition", new AttributeValue().withN("1"));
PutItemRequest putItemRequest = new PutItemRequest()
.withTableName(tableName)
.withItem(item1);
client.putItem(putItemRequest);
Map<String, AttributeValue> item2 = new HashMap<String,
AttributeValue>();
item2.put("BookTitle", new
AttributeValue().withS("Inferno"));
item2.put("Author", new
AttributeValue().withS("DanBrown"));