Package com.illumon.iris.db.v2.locations.remote

Class RemoteTableDataService.TableLocationProviderImpl

java.lang.Object

com.illumon.iris.db.v2.locations.SubscriptionAggregator<TableLocationProvider.Listener>

com.illumon.iris.db.v2.locations.AbstractTableLocationProvider

com.illumon.iris.db.v2.locations.remote.RemoteTableDataService.TableLocationProviderImpl

All Implemented Interfaces:

com.fishlib.base.log.LogOutputAppendable, RequestResultHandler, TableKey, TableLocationProvider, NamedImplementation

Enclosing class:

RemoteTableDataService

public class RemoteTableDataService.TableLocationProviderImpl
extends AbstractTableLocationProvider
implements RequestResultHandler

TableLocationProvider implementation that delegates to appropriate Requests.

Nested Class Summary

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.locations.TableKey

TableKey.KeyedObjectKeyImpl<VALUE_TYPE>, TableKey.SelfKeyedObjectKeyImpl<VALUE_TYPE extends TableKey>

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.locations.TableLocationProvider

TableLocationProvider.Listener, TableLocationProvider.Null

Field Summary

Fields inherited from class com.illumon.iris.db.v2.locations.SubscriptionAggregator

subscriptions

Fields inherited from interface com.illumon.iris.db.v2.locations.protocol.RequestResultHandler

NULL

Fields inherited from interface com.illumon.iris.db.v2.locations.TableKey

NULL_NAME

Fields inherited from interface com.illumon.iris.db.v2.locations.TableLocationProvider

globalMark

Method Summary

Modifier and Type	Method	Description
protected void	activateUnderlyingDataSource()	Refresh and activate update pushing from the implementing class.
boolean	checkHasSubscribers()	Check if this subscription aggregator still has any valid subscribers - useful if there may have been no notifications delivered for some time, as a test to determine whether work should be done to maintain the underlying subscription.
protected void	deactivateUnderlyingDataSource()	Deactivate pushed updates from the implementing class.
String	getImplementationName()	Get a name for the implementing class.
String	getName()	allow TableLocationProvider instances to have names.
protected TableLocation	makeTableLocation(TableLocationKey locationKey)	Make a new implementation-appropriate TableLocation from the supplied key.
protected <T> boolean	matchSubscriptionToken(T token)	Verify that a notification pertains to a currently-active subscription.
void	onComplete(TableDataRequest request)	Invoked when the request completed successfully.
void	onRejection(TableDataRequest request, String rejectionMessage, TableDataProtocol.RequestRejectionType requestRejectionType)	Invoked when the specified request was rejected.
void	onTableLocationKey(TableLocationKey locationKey)	Invoked in response to a table locations request for each discovered TableLocationKey.
void	onTableLocationState(TableLocationState state)	Invoked in response to a location refresh request.
void	onTimeout(TableDataRequest request)	Invoked when the specified request timed out before a response was received.
protected void	postActivationHook()	Method to override in order to observe successful activation.
void	refresh()	Initialize or refresh state information about the list of existing locations.
String	toStringDetailed()	Optional toString path with more implementation detail.

Methods inherited from class com.illumon.iris.db.v2.locations.AbstractTableLocationProvider

deliverInitialSnapshot, doInitialization, ensureInitialized, getLog, getNamespace, getTableKey, getTableLocationIfPresent, getTableLocations, getTableName, getTableType, handleTableLocationKey, handleTableLocationKey, isInitialized, mark, maybeReloadLocation, refreshAndRescan, removeTableLocationKey, removeUnvisited, setInitialized, toString

Methods inherited from class com.illumon.iris.db.v2.locations.SubscriptionAggregator

activationFailed, activationSuccessful, subscribe, supportsSubscriptions, unsubscribe

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.illumon.iris.db.v2.locations.TableKey

append, asTableIdentifier, toStringHelper, toStringSimple, writeTo

Methods inherited from interface com.illumon.iris.db.v2.locations.TableLocationProvider

getTableLocation, getTableLocation, refreshAndRescan, subscribe, supportsSubscriptions, unsubscribe

Method Details

getImplementationName

public String getImplementationName()

Description copied from interface: NamedImplementation

Get a name for the implementing class. Useful for abstract classes that implement LogOutputAppendable or override toString.

The default implementation is correct, but not suitable for high-frequency usage.

Specified by:

getImplementationName in interface NamedImplementation

Returns:

A name for the implementing class

activateUnderlyingDataSource

protected void activateUnderlyingDataSource()

Description copied from class: SubscriptionAggregator

Refresh and activate update pushing from the implementing class.

If the implementation will deliver notifications in a different thread than the one that calls this method, then this method must be asynchronous - that is, it must not block pending delivery of results. This requirement holds even if that other thread has nothing to do with the initial activation request!

Listeners should guard against duplicate notifications, especially if the implementation delivers synchronous notifications.

The implementation should call activationSuccessful() when done activating and delivering initial refresh results, unless activationFailed() was called instead.

Must be called under the subscription lock.

Overrides:

activateUnderlyingDataSource in class SubscriptionAggregator<TableLocationProvider.Listener>

deactivateUnderlyingDataSource

protected void deactivateUnderlyingDataSource()

Description copied from class: SubscriptionAggregator

Deactivate pushed updates from the implementing class. Must be called under the subscription lock.

Overrides:

deactivateUnderlyingDataSource in class SubscriptionAggregator<TableLocationProvider.Listener>

matchSubscriptionToken

protected <T> boolean matchSubscriptionToken(T token)

Description copied from class: SubscriptionAggregator

Verify that a notification pertains to a currently-active subscription. Must be called under the subscription lock.

Overrides:

matchSubscriptionToken in class SubscriptionAggregator<TableLocationProvider.Listener>

Parameters:

token - A subscription-related object that the subclass can use to match a notification

Returns:

True iff notification delivery should proceed

postActivationHook

protected void postActivationHook()

Description copied from class: SubscriptionAggregator

Method to override in order to observe successful activation.

Overrides:

postActivationHook in class SubscriptionAggregator<TableLocationProvider.Listener>

refresh

public void refresh()

Description copied from interface: TableLocationProvider

Initialize or refresh state information about the list of existing locations.

Specified by:

refresh in interface TableLocationProvider

makeTableLocation

@NotNull protected TableLocation makeTableLocation(@NotNull TableLocationKey locationKey)

Description copied from class: AbstractTableLocationProvider

Make a new implementation-appropriate TableLocation from the supplied key.

Specified by:

makeTableLocation in class AbstractTableLocationProvider

Parameters:

locationKey - The table location key

Returns:

The new TableLocation

getName

public String getName()

Description copied from interface: TableLocationProvider

allow TableLocationProvider instances to have names.

Specified by:

getName in interface TableLocationProvider

toStringDetailed

public String toStringDetailed()

Description copied from interface: TableKey

Optional toString path with more implementation detail.

Specified by:

toStringDetailed in interface TableKey

Returns:

detailed conversion to string

onTimeout

public void onTimeout(@NotNull TableDataRequest request)

Description copied from interface: RequestResultHandler

Invoked when the specified request timed out before a response was received.

Specified by:

onTimeout in interface RequestResultHandler

Parameters:

request - the request object.

onRejection

public void onRejection(@NotNull TableDataRequest request, String rejectionMessage, TableDataProtocol.RequestRejectionType requestRejectionType)

Description copied from interface: RequestResultHandler

Invoked when the specified request was rejected. This typically happens during subscription to a location

Specified by:

onRejection in interface RequestResultHandler

Parameters:

request - the request object.

rejectionMessage - a message for context about the rejection

requestRejectionType - what type of rejection was received

onComplete

public void onComplete(@NotNull TableDataRequest request)

Description copied from interface: RequestResultHandler

Invoked when the request completed successfully.

Specified by:

onComplete in interface RequestResultHandler

Parameters:

request - the request object

onTableLocationKey

public void onTableLocationKey(@NotNull TableLocationKey locationKey)

Description copied from interface: RequestResultHandler

Invoked in response to a table locations request for each discovered TableLocationKey.

Specified by:

onTableLocationKey in interface RequestResultHandler

Parameters:

locationKey - the discovered TableLocationKey

onTableLocationState

public void onTableLocationState(@NotNull TableLocationState state)

Description copied from interface: RequestResultHandler

Invoked in response to a location refresh request.

Specified by:

onTableLocationState in interface RequestResultHandler

Parameters:

state - the updated TableLocationState for the location requested

checkHasSubscribers

public boolean checkHasSubscribers()

Description copied from class: SubscriptionAggregator

Check if this subscription aggregator still has any valid subscribers - useful if there may have been no notifications delivered for some time, as a test to determine whether work should be done to maintain the underlying subscription.

Specified by:

checkHasSubscribers in interface RequestResultHandler

Overrides:

checkHasSubscribers in class SubscriptionAggregator<TableLocationProvider.Listener>

Returns:

true if there are valid subscribers, else false