org.eclipse.scada.da.server.proxy.item

Class ProxyValueHolder

java.lang.Object

org.eclipse.scada.da.server.proxy.item.ProxyItemSupport

org.eclipse.scada.da.server.proxy.item.ProxyValueHolder

public class ProxyValueHolder
extends ProxyItemSupport

Author:

Juergen Rose <juergen.rose@th4-systems.com>

Field Summary

Fields

Modifier and Type	Field and Description
protected ItemUpdateListener	listener
protected Map<ProxySubConnectionId,DataItemValue.Builder>	values

Fields inherited from class org.eclipse.scada.da.server.proxy.item.ProxyItemSupport

currentConnection, prefix, proxyItemId, separator

Constructor Summary

Constructors

Constructor and Description
ProxyValueHolder(String separator, ProxyPrefixName prefix, ProxySubConnectionId currentConnection, String itemId)

Method Summary

Modifier and Type	Method and Description
Map<String,Variant>	getAttributes()
DataItemValue	getCurrentValue()
protected DataItemValue.Builder	getItemValue(ProxySubConnectionId id) must be called synchronized
Variant	getValue()
void	setListener(ItemUpdateListener listener)
void	switchTo(ProxySubConnectionId newConnection) Switch between connections
void	updateData(ProxySubConnectionId connection, Variant value, Map<String,Variant> attributes, AttributeMode mode)
void	updateSubscriptionState(ProxySubConnectionId connection, SubscriptionState subscriptionState, Throwable subscriptionError)

Methods inherited from class org.eclipse.scada.da.server.proxy.item.ProxyItemSupport

getItemId

Methods inherited from class java.lang.Object

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

Field Detail

values

protected final Map<ProxySubConnectionId,DataItemValue.Builder> values

listener

protected ItemUpdateListener listener

Constructor Detail

ProxyValueHolder

public ProxyValueHolder(String separator,
                        ProxyPrefixName prefix,
                        ProxySubConnectionId currentConnection,
                        String itemId)

Parameters:

currentConnection -

Method Detail

switchTo

public void switchTo(ProxySubConnectionId newConnection)

Description copied from class: ProxyItemSupport

Switch between connections

Overrides:

switchTo in class ProxyItemSupport

updateData

public void updateData(ProxySubConnectionId connection,
                       Variant value,
                       Map<String,Variant> attributes,
                       AttributeMode mode)

Parameters:

connection -

value -

attributes -

mode -

getItemValue

protected DataItemValue.Builder getItemValue(ProxySubConnectionId id)

must be called synchronized

Parameters:

id - if the connection

Returns:

the data item value for this connection

getAttributes

public Map<String,Variant> getAttributes()

Returns:

return current attribs

getValue

public Variant getValue()

Returns:

return current value

setListener

public void setListener(ItemUpdateListener listener)

Parameters:

listener -

updateSubscriptionState

public void updateSubscriptionState(ProxySubConnectionId connection,
                                    SubscriptionState subscriptionState,
                                    Throwable subscriptionError)

Parameters:

connection -

subscriptionState -

subscriptionError -

getCurrentValue

public DataItemValue getCurrentValue()