org.apache.gora.dynamodb.store
Class DynamoDBStore<K,T extends org.apache.gora.persistency.Persistent>

java.lang.Object
  org.apache.gora.store.ws.impl.WSDataStoreBase<K,T>
      org.apache.gora.dynamodb.store.DynamoDBStore<K,T>

All Implemented Interfaces:

org.apache.gora.store.DataStore<K,T>

public class DynamoDBStore<K,T extends org.apache.gora.persistency.Persistent>
extends org.apache.gora.store.ws.impl.WSDataStoreBase<K,T>

Field Summary

static org.slf4j.Logger

LOG Helper to write useful information into the logs

Fields inherited from class org.apache.gora.store.ws.impl.WSDataStoreBase

authentication, keyClass, properties

Constructor Summary

DynamoDBStore()
Constructor

Method Summary

void	close()
void	createSchema() Creates the table within the data store for a preferred schema or for a group of schemas defined withing the mapping file
boolean	delete(K key) Deletes the object using key
long	deleteByQuery(org.apache.gora.query.Query<K,T> query) Deletes items using a specific query
void	deleteSchema() Deletes all tables present in the mapping object.
org.apache.gora.query.Result<K,T>	execute(org.apache.gora.query.Query<K,T> query) Executes a query after building a DynamoDB specific query based on the received one
void	executeDeleteTableRequest(String pTableName) Executes a delete table request using the DynamoDB client
void	flush()
T	get(K key)
T	get(K key, String[] fields)
org.apache.gora.persistency.BeanFactory<K,T>	getBeanFactory()
com.amazonaws.services.dynamodb.AmazonDynamoDB	getClient(String clientType, com.amazonaws.auth.AWSCredentials credentials) Method to create the specific client to be used
List<org.apache.gora.query.PartitionQuery<K,T>>	getPartitions(org.apache.gora.query.Query<K,T> query)
String	getSchemaName() Gets the preferred schema
void	initialize(Class<K> keyClass, Class<T> pPersistentClass, Properties properties) Initialize the data store by reading the credentials, setting the cloud provider, setting the client's properties up, setting the end point and reading the mapping file
K	newKey() Returns a new instance of the key object.
T	newPersistent() Returns a new persistent object
org.apache.gora.query.Query<K,T>	newQuery() Creates a new DynamoDBQuery
void	put(K key, T obj) Puts an object identified by a key
boolean	schemaExists() Verifies if the specified schemas exist
void	setBeanFactory(org.apache.gora.persistency.BeanFactory<K,T> beanFactory)
void	setSchemaName(String pSchemaName) Sets the preferred schema

Methods inherited from class org.apache.gora.store.ws.impl.WSDataStoreBase

equals, getConf, getKeyClass, getPersistentClass, getSchemaName, getWSProvider, readFields, setConf, setKeyClass, setPersistentClass, setWsProvider, truncateSchema, write

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Helper to write useful information into the logs

Constructor Detail

DynamoDBStore

public DynamoDBStore()

Constructor

Method Detail

initialize

public void initialize(Class<K> keyClass,
                       Class<T> pPersistentClass,
                       Properties properties)

Initialize the data store by reading the credentials, setting the cloud provider, setting the client's properties up, setting the end point and reading the mapping file

Specified by:

initialize in interface org.apache.gora.store.DataStore<K,T extends org.apache.gora.persistency.Persistent>

Overrides:

initialize in class org.apache.gora.store.ws.impl.WSDataStoreBase<K,T extends org.apache.gora.persistency.Persistent>

getClient

public com.amazonaws.services.dynamodb.AmazonDynamoDB getClient(String clientType,
                                                                com.amazonaws.auth.AWSCredentials credentials)

Method to create the specific client to be used

Parameters:

clientType -

credentials -

Returns:

execute

public org.apache.gora.query.Result<K,T> execute(org.apache.gora.query.Query<K,T> query)

Executes a query after building a DynamoDB specific query based on the received one

get

public T get(K key,
             String[] fields)

get

public T get(K key)

newQuery

public org.apache.gora.query.Query<K,T> newQuery()

Creates a new DynamoDBQuery

getSchemaName

public String getSchemaName()

Gets the preferred schema

setSchemaName

public void setSchemaName(String pSchemaName)

Sets the preferred schema

Parameters:

pSchemaName -

createSchema

public void createSchema()

Creates the table within the data store for a preferred schema or for a group of schemas defined withing the mapping file

Throws:

IOException

deleteSchema

public void deleteSchema()

Deletes all tables present in the mapping object.

Throws:

IOException

executeDeleteTableRequest

public void executeDeleteTableRequest(String pTableName)

Executes a delete table request using the DynamoDB client

Parameters:

tableName -

schemaExists

public boolean schemaExists()

Verifies if the specified schemas exist

Throws:

IOException

newKey

public K newKey()

Returns a new instance of the key object.

Throws:

IOException

newPersistent

public T newPersistent()

Returns a new persistent object

Throws:

IOException

put

public void put(K key,
                T obj)

Puts an object identified by a key

Throws:

IOException

delete

public boolean delete(K key)

Deletes the object using key

Returns:

true for a successful process

Throws:

IOException

deleteByQuery

public long deleteByQuery(org.apache.gora.query.Query<K,T> query)

Deletes items using a specific query

Throws:

IOException

getPartitions

public List<org.apache.gora.query.PartitionQuery<K,T>> getPartitions(org.apache.gora.query.Query<K,T> query)
                                                                                                             throws IOException

Throws:

IOException

flush

public void flush()

setBeanFactory

public void setBeanFactory(org.apache.gora.persistency.BeanFactory<K,T> beanFactory)

getBeanFactory

public org.apache.gora.persistency.BeanFactory<K,T> getBeanFactory()

close

public void close()