com.amazon.ask.attributes.persistence.impl

Class DynamoDbPersistenceAdapter

java.lang.Object

com.amazon.ask.attributes.persistence.impl.DynamoDbPersistenceAdapter

All Implemented Interfaces:

PersistenceAdapter

public final class DynamoDbPersistenceAdapter
extends Object
implements PersistenceAdapter

Persistence adapter for storing skill persistence attributes in Amazon DynamoDB.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DynamoDbPersistenceAdapter.Builder Static builder class to build an instance of DynamoDbPersistenceAdapter.

Method Summary

Modifier and Type	Method and Description
static DynamoDbPersistenceAdapter.Builder	builder() Static method to build an instance of Builder.
void	deleteAttributes(RequestEnvelope envelope) Deletes attributes from DynamoDB table.
Optional<Map<String,Object>>	getAttributes(RequestEnvelope envelope) Gets attributes from DynamoDB table.
void	saveAttributes(RequestEnvelope envelope, Map<String,Object> attributes) Saves attributes to a DynamoDB table.

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static DynamoDbPersistenceAdapter.Builder builder()

Static method to build an instance of Builder.

Returns:

DynamoDbPersistenceAdapter.Builder.

getAttributes

public Optional<Map<String,Object>> getAttributes(RequestEnvelope envelope)
                                           throws PersistenceException

Gets attributes from DynamoDB table.

Specified by:

getAttributes in interface PersistenceAdapter

Parameters:

envelope - instance of RequestEnvelope.

Returns:

Map of String, Object if attributes exist, or an empty Optional if not.

Throws:

PersistenceException - if table doesn't exist or attributes retrieval fails.

saveAttributes

public void saveAttributes(RequestEnvelope envelope,
                           Map<String,Object> attributes)
                    throws PersistenceException

Saves attributes to a DynamoDB table.

Specified by:

saveAttributes in interface PersistenceAdapter

Parameters:

envelope - instance of RequestEnvelope.

attributes - to be stored in the table.

Throws:

PersistenceException - if table doesn't exist or save attributes operation fails.

deleteAttributes

public void deleteAttributes(RequestEnvelope envelope)
                      throws PersistenceException

Deletes attributes from DynamoDB table.

Specified by:

deleteAttributes in interface PersistenceAdapter

Parameters:

envelope - instance of RequestEnvelope.

Throws:

PersistenceException - if table doesn't exist or save attributes operation fails.