com.amazon.ask.attributes.persistence.impl

Class PartitionKeyGenerators

java.lang.Object

com.amazon.ask.attributes.persistence.impl.PartitionKeyGenerators

public final class PartitionKeyGenerators
extends Object

Helps to generate partition keys from the userId or deviceId or personId contained in an incoming request.

Method Summary

Modifier and Type	Method and Description
static Function<RequestEnvelope,String>	deviceId() Produces a partition key from the device ID contained in an incoming request.
static Function<RequestEnvelope,String>	personId() Produces a partition key from the Person ID contained in an incoming request.
static Function<RequestEnvelope,String>	userId() Produces a partition key from the user ID contained in an incoming request.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

userId

public static Function<RequestEnvelope,String> userId()

Produces a partition key from the user ID contained in an incoming request.

Returns:

partition key derived from user ID

Throws:

PersistenceException - if user ID cannot be retrieved

deviceId

public static Function<RequestEnvelope,String> deviceId()

Produces a partition key from the device ID contained in an incoming request.

Returns:

partition key derived from device ID

Throws:

PersistenceException - if device ID cannot be retrieved

personId

public static Function<RequestEnvelope,String> personId()

Produces a partition key from the Person ID contained in an incoming request. If the person ID is not available, the user ID will be used as fallback.

Returns:

partition key derived from person ID, if available, or user ID if person in unavailable.

Throws:

PersistenceException - if person ID cannot be retrieved and fallback to user ID fails.