org.eclipse.scada.da.server.exporter.common

Class AggregatingSubscriptionManager

java.lang.Object

org.eclipse.scada.da.server.exporter.common.AbstractSubscriptionManager

org.eclipse.scada.da.server.exporter.common.AggregatingSubscriptionManager

public class AggregatingSubscriptionManager
extends AbstractSubscriptionManager

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	AggregatingSubscriptionManager.Listener

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ScheduledExecutorService	executor

Fields inherited from class org.eclipse.scada.da.server.exporter.common.AbstractSubscriptionManager

cache, started

Constructor Summary

Constructors

Constructor and Description
AggregatingSubscriptionManager(java.util.concurrent.ScheduledExecutorService executor, HiveSource hiveSource, java.util.Properties properties) Create a new subscription manager
AggregatingSubscriptionManager(java.util.concurrent.ScheduledExecutorService executor, HiveSource hiveSource, java.util.Properties properties, AggregatingSubscriptionManager.Listener listener) Create a new subscription manager

Method Summary

Methods

Modifier and Type	Method and Description
protected void	clearCache()
protected void	putState(java.lang.String itemId, DataItemValue value)
void	stop()
void	subscribe(java.lang.String itemId) Subscribe to an item
void	subscribeAll(java.util.Set<java.lang.String> itemIds) Subscribe to multiple items
void	unsubscribe(java.lang.String itemId)

Methods inherited from class org.eclipse.scada.da.server.exporter.common.AbstractSubscriptionManager

bind, getCacheCopy, getCacheValue, handleCreateSessionResult, handleDataChanged, handleSubscriptionChanged, performSetHive, start, unbind, writeAttributes, writeValue

Methods inherited from class java.lang.Object

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

Field Detail

executor

protected final java.util.concurrent.ScheduledExecutorService executor

Constructor Detail

AggregatingSubscriptionManager

public AggregatingSubscriptionManager(java.util.concurrent.ScheduledExecutorService executor,
                              HiveSource hiveSource,
                              java.util.Properties properties,
                              AggregatingSubscriptionManager.Listener listener)

Create a new subscription manager

Parameters:

executor - a single threaded executor

hiveSource - the source of the hive to attach to

properties - the session properties for the hive

listener - optionally a listener that will get a call when any of the values in the cache changed

AggregatingSubscriptionManager

public AggregatingSubscriptionManager(java.util.concurrent.ScheduledExecutorService executor,
                              HiveSource hiveSource,
                              java.util.Properties properties)

Create a new subscription manager

Parameters:

executor - a single threaded executor

hiveSource - the source of the hive to attach to

properties - the session properties for the hive

Method Detail

stop

public void stop()

Overrides:

stop in class AbstractSubscriptionManager

clearCache

protected void clearCache()

Overrides:

clearCache in class AbstractSubscriptionManager

putState

protected void putState(java.lang.String itemId,
            DataItemValue value)

Overrides:

putState in class AbstractSubscriptionManager

subscribe

public void subscribe(java.lang.String itemId)

Description copied from class: AbstractSubscriptionManager

Subscribe to an item

Subscriptions may only be made after the manager was started using AbstractSubscriptionManager.start().

Overrides:

subscribe in class AbstractSubscriptionManager

Parameters:

itemId - id of the item to subscribe to

unsubscribe

public void unsubscribe(java.lang.String itemId)

Overrides:

unsubscribe in class AbstractSubscriptionManager

subscribeAll

public void subscribeAll(java.util.Set<java.lang.String> itemIds)

Description copied from class: AbstractSubscriptionManager

Subscribe to multiple items

Subscriptions may only be made after the manager was started using AbstractSubscriptionManager.start().

Overrides:

subscribeAll in class AbstractSubscriptionManager

Parameters:

itemIds - the ids of the items to subscribe to