DynamoDB - Specify two index names @DynamoDbIndexHashkey globalSecondaryIndexName
You have to specify the index names in a String array globalSecondaryIndexNames:
@DynamoDBIndexHashKey( attributeName = "placeid" globalSecondaryIndexNames={ "placeid-starttime-index","placeid-endtime-index"} )
private String placeid;
The @dynamodbindexhashkey annotation also takes an array for the index names.
Check below link for documentation.
http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/dynamodbv2/datamodeling/DynamoDBIndexHashKey.html