Package com.scaleoutsoftware.digitaltwin.persistentstorage

Class DynamoDbPersistenceProvider<V extends DigitalTwinBase>

java.lang.Object

com.scaleoutsoftware.digitaltwin.persistentstorage.PersistentStorage<V>

com.scaleoutsoftware.digitaltwin.persistentstorage.DynamoDbPersistenceProvider<V>

Type Parameters:

V - the type of the digital twin

All Implemented Interfaces:

com.scaleout.client.ighosting.InvocationGridSignalHandler, PersistenceProvider, java.lang.AutoCloseable

public class DynamoDbPersistenceProvider<V extends DigitalTwinBase>
extends PersistentStorage<V>
implements PersistenceProvider, java.lang.AutoCloseable

DynamoDB persistent storage - transparently store and load digital twins to and from a DynamoDB deployment.

Field Summary

Fields inherited from class com.scaleoutsoftware.digitaltwin.persistentstorage.PersistentStorage

_connection

Constructor Summary

Constructors

Constructor	Description
DynamoDbPersistenceProvider(com.scaleout.client.GridConnection connection, java.lang.String model, java.lang.Class<V> clazz)

Method Summary

Modifier and Type	Method	Description
void	close()
java.lang.String	getInstance(java.lang.String modelName, java.lang.String instanceId)	Retrieves an instance or null if it doesn't exist.
java.util.concurrent.CompletableFuture<java.lang.String>	getInstanceAsync(java.lang.String modelName, java.lang.String instanceId)	Retrieves a future that when complete will return an instance or null if it doesn't exist.
java.util.List<java.lang.String>	getInstanceIds(java.lang.String modelName)	Retrieves the instance IDs stored in a container, or an empty list if no instances exist.
java.util.concurrent.CompletableFuture<java.util.List<java.lang.String>>	getInstanceIdsAsync(java.lang.String modelName)	Retrieves a future that when complete will return the instance IDs stored in a container, or an empty list if no instances exist.
byte	getPersistencePolicy()
<T> T	getProperty(java.lang.String modelName, java.lang.String instanceId, java.lang.String propertyName, java.lang.Class<T> aClass)	Retrieves a property or null if the property does not exist.
<T> java.util.concurrent.CompletableFuture<T>	getPropertyAsync(java.lang.String modelName, java.lang.String instanceId, java.lang.String propertyName, java.lang.Class<T> aClass)	Retrieves a future that will return a property or null if the property does not exist.
java.util.Map<java.lang.String,java.lang.String>	getPropertyMap(java.lang.String s)	Retrieves a map of property names to property types, or an empty map.
java.util.concurrent.CompletableFuture<java.util.Map<java.lang.String,java.lang.String>>	getPropertyMapAsync(java.lang.String s)	Retrieves a future that will return a map of property names to property, or an empty map.
PersistenceProviderType	getProviderType()	Retrieves this persistence providers type.
<T> T	getRtdtProperty(java.lang.String instanceId, java.lang.String propertyName, java.lang.Class<T> aClass)	Retrieves a property for a RTDT instance or null if the property does not exist.
<T> java.util.concurrent.CompletableFuture<T>	getRtdtPropertyAsync(java.lang.String instanceId, java.lang.String propertyName, java.lang.Class<T> aClass)	Retrieves a future that will return a property value for a RTDT instance or null if the property doesn't exist.
java.lang.String	getTableName()
void	initialize(java.util.HashMap<java.lang.String,java.lang.String> conf)
void	initializeDynamoDbConnection()
boolean	isActive()	Returns true if this PersistenceProvider is active, false otherwise.
V	load(java.lang.String id)
void	onSignal(com.scaleout.client.ighosting.InvocationGridSignal invocationGridSignal, java.lang.Object o)
void	store(V instance)
java.lang.String	toString()
void	updateProperty(java.lang.String modelName, java.lang.String instanceId, java.lang.String propertyName, java.lang.Object propertyValue)	Updates a property for the provided instance id in the provided container specified by the property name and property value.
java.util.concurrent.CompletableFuture<java.lang.Void>	updatePropertyAsync(java.lang.String modelName, java.lang.String instanceId, java.lang.String propertyName, java.lang.Object propertyValue)	Retrieves a future that will complete exceptionally or return void if the instance's property was successfully updated.
void	updateRtdtProperty(java.lang.String instanceId, java.lang.String propertyName, java.lang.Object propertyValue)	Updates a RTDT property for the provided instance id specified by the property name and property value.
java.util.concurrent.CompletableFuture<java.lang.Void>	updateRtdtPropertyAsync(java.lang.String instanceId, java.lang.String propertyName, java.lang.Object propertyValue)	Retrieves a future that will complete exceptionally or return void if the RTDT's property was successfully updated.

Methods inherited from class java.lang.Object

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

Constructor Detail

DynamoDbPersistenceProvider

public DynamoDbPersistenceProvider(com.scaleout.client.GridConnection connection,
                                   java.lang.String model,
                                   java.lang.Class<V> clazz)

Method Detail

getTableName

public java.lang.String getTableName()

isActive

public boolean isActive()

Description copied from interface: PersistenceProvider

Returns true if this PersistenceProvider is active, false otherwise.

Specified by:

isActive in interface PersistenceProvider

Specified by:

isActive in class PersistentStorage<V extends DigitalTwinBase>

Returns:

true if this PersistenceProvider is active, false otherwise.

store

public void store(V instance)

Specified by:

store in class PersistentStorage<V extends DigitalTwinBase>

load

public V load(java.lang.String id)

Specified by:

load in class PersistentStorage<V extends DigitalTwinBase>

getPersistencePolicy

public byte getPersistencePolicy()

Specified by:

getPersistencePolicy in class PersistentStorage<V extends DigitalTwinBase>

initialize

public void initialize(java.util.HashMap<java.lang.String,java.lang.String> conf)

Specified by:

initialize in class PersistentStorage<V extends DigitalTwinBase>

initializeDynamoDbConnection

public void initializeDynamoDbConnection()

getProviderType

public PersistenceProviderType getProviderType()

Description copied from interface: PersistenceProvider

Retrieves this persistence providers type. Currently supported provider types: AzureDigitalTwins.

Specified by:

getProviderType in interface PersistenceProvider

Returns:

the persistence provider type.

getInstanceIdsAsync

public java.util.concurrent.CompletableFuture<java.util.List<java.lang.String>> getInstanceIdsAsync(java.lang.String modelName)

Description copied from interface: PersistenceProvider

Retrieves a future that when complete will return the instance IDs stored in a container, or an empty list if no instances exist.

Specified by:

getInstanceIdsAsync in interface PersistenceProvider

Parameters:

modelName - the container name.

Returns:

a future that will return a list of instances.

getInstanceIds

public java.util.List<java.lang.String> getInstanceIds(java.lang.String modelName)

Description copied from interface: PersistenceProvider

Retrieves the instance IDs stored in a container, or an empty list if no instances exist.

Specified by:

getInstanceIds in interface PersistenceProvider

Parameters:

modelName - the container name.

Returns:

a list of instances.

getInstanceAsync

public java.util.concurrent.CompletableFuture<java.lang.String> getInstanceAsync(java.lang.String modelName,
                                                                                 java.lang.String instanceId)

Description copied from interface: PersistenceProvider

Retrieves a future that when complete will return an instance or null if it doesn't exist.

Specified by:

getInstanceAsync in interface PersistenceProvider

Parameters:

modelName - the container name.

instanceId - the instance identifier.

Returns:

a future that will return an instance or null.

getInstance

public java.lang.String getInstance(java.lang.String modelName,
                                    java.lang.String instanceId)

Description copied from interface: PersistenceProvider

Retrieves an instance or null if it doesn't exist.

Specified by:

getInstance in interface PersistenceProvider

Parameters:

modelName - the container name

instanceId - the instance identifier

Returns:

the instance or null.

getPropertyMapAsync

public java.util.concurrent.CompletableFuture<java.util.Map<java.lang.String,java.lang.String>> getPropertyMapAsync(java.lang.String s)

Description copied from interface: PersistenceProvider

Retrieves a future that will return a map of property names to property, or an empty map.

Specified by:

getPropertyMapAsync in interface PersistenceProvider

Parameters:

s - the container name.

Returns:

a future that will return a map of property names to property types.

getPropertyMap

public java.util.Map<java.lang.String,java.lang.String> getPropertyMap(java.lang.String s)

Description copied from interface: PersistenceProvider

Retrieves a map of property names to property types, or an empty map.

Specified by:

getPropertyMap in interface PersistenceProvider

Parameters:

s - the container name.

Returns:

a map of property names to property types.

updatePropertyAsync

public java.util.concurrent.CompletableFuture<java.lang.Void> updatePropertyAsync(java.lang.String modelName,
                                                                                  java.lang.String instanceId,
                                                                                  java.lang.String propertyName,
                                                                                  java.lang.Object propertyValue)

Description copied from interface: PersistenceProvider

Retrieves a future that will complete exceptionally or return void if the instance's property was successfully updated. Updates a property for the provided instance id in the provided container specified by the property name and property value.

Specified by:

updatePropertyAsync in interface PersistenceProvider

Parameters:

modelName - the container name.

instanceId - the instance id.

propertyName - the property name.

propertyValue - the property value.

Returns:

a future that will complete exceptionally or return void.

updateProperty

public void updateProperty(java.lang.String modelName,
                           java.lang.String instanceId,
                           java.lang.String propertyName,
                           java.lang.Object propertyValue)

Description copied from interface: PersistenceProvider

Updates a property for the provided instance id in the provided container specified by the property name and property value.

Specified by:

updateProperty in interface PersistenceProvider

Parameters:

modelName - the container name.

instanceId - the instance id.

propertyName - the property name.

propertyValue - the property value.

getPropertyAsync

public <T> java.util.concurrent.CompletableFuture<T> getPropertyAsync(java.lang.String modelName,
                                                                      java.lang.String instanceId,
                                                                      java.lang.String propertyName,
                                                                      java.lang.Class<T> aClass)

Description copied from interface: PersistenceProvider

Retrieves a future that will return a property or null if the property does not exist.

Specified by:

getPropertyAsync in interface PersistenceProvider

Type Parameters:

T - the type of the property to return

Parameters:

modelName - the container name.

instanceId - the instance id.

propertyName - the property name.

aClass - the class representing the property.

Returns:

the property or null if the property does not exist.

getProperty

public <T> T getProperty(java.lang.String modelName,
                         java.lang.String instanceId,
                         java.lang.String propertyName,
                         java.lang.Class<T> aClass)

Description copied from interface: PersistenceProvider

Retrieves a property or null if the property does not exist.

Specified by:

getProperty in interface PersistenceProvider

Type Parameters:

T - the type of the property to return.

Parameters:

modelName - the container name.

instanceId - the instance id.

propertyName - the property name

aClass - the class representing the property.

Returns:

the property or null if the property does not exist.

updateRtdtPropertyAsync

public java.util.concurrent.CompletableFuture<java.lang.Void> updateRtdtPropertyAsync(java.lang.String instanceId,
                                                                                      java.lang.String propertyName,
                                                                                      java.lang.Object propertyValue)

Description copied from interface: PersistenceProvider

Retrieves a future that will complete exceptionally or return void if the RTDT's property was successfully updated. Updates a RTDT property for the provided instance id specified by the property name and property value.

Specified by:

updateRtdtPropertyAsync in interface PersistenceProvider

Parameters:

instanceId - the instance id.

propertyName - the property name.

propertyValue - the property value.

Returns:

a future that will complete exceptionally or return void.

updateRtdtProperty

public void updateRtdtProperty(java.lang.String instanceId,
                               java.lang.String propertyName,
                               java.lang.Object propertyValue)

Description copied from interface: PersistenceProvider

Updates a RTDT property for the provided instance id specified by the property name and property value.

Specified by:

updateRtdtProperty in interface PersistenceProvider

Parameters:

instanceId - the instance id.

propertyName - the property name.

propertyValue - the property value.

getRtdtPropertyAsync

public <T> java.util.concurrent.CompletableFuture<T> getRtdtPropertyAsync(java.lang.String instanceId,
                                                                          java.lang.String propertyName,
                                                                          java.lang.Class<T> aClass)

Description copied from interface: PersistenceProvider

Retrieves a future that will return a property value for a RTDT instance or null if the property doesn't exist.

Specified by:

getRtdtPropertyAsync in interface PersistenceProvider

Type Parameters:

T - the type of the property to return.

Parameters:

instanceId - the instance id.

propertyName - the property name.

aClass - the class of the property type

Returns:

a future that will return a property value for a RTDT instance.

getRtdtProperty

public <T> T getRtdtProperty(java.lang.String instanceId,
                             java.lang.String propertyName,
                             java.lang.Class<T> aClass)

Description copied from interface: PersistenceProvider

Retrieves a property for a RTDT instance or null if the property does not exist.

Specified by:

getRtdtProperty in interface PersistenceProvider

Type Parameters:

T - the type of the property to return.

Parameters:

instanceId - the instance id.

propertyName - the property name.

aClass - the class of the property type.

Returns:

the property value.

close

public void close()
           throws java.lang.Exception

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

onSignal

public void onSignal(com.scaleout.client.ighosting.InvocationGridSignal invocationGridSignal,
                     java.lang.Object o)

Specified by:

onSignal in interface com.scaleout.client.ighosting.InvocationGridSignalHandler