org.openscada.opc.lib.da

Class AccessBase

java.lang.Object

org.openscada.opc.lib.da.AccessBase

All Implemented Interfaces:

ServerConnectionStateListener

Direct Known Subclasses:

Async20Access, SyncAccess

public abstract class AccessBase
extends Object
implements ServerConnectionStateListener

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	active
protected org.slf4j.Logger	dataLogger
protected Group	group
protected Map<Item,ItemState>	itemCache
protected Map<String,Item>	itemMap
protected Map<Item,DataCallback>	items Holds the item to callback assignment
protected Map<String,DataCallback>	itemSet
protected String	logTag
protected Server	server

Constructor Summary

Constructors

Constructor and Description
AccessBase(Server server, int period)
AccessBase(Server server, int period, String logTag)

Method Summary

Modifier and Type	Method and Description
void	addItem(String itemId, DataCallback dataCallback)
void	addStateListener(AccessStateListener listener)
void	bind()
void	clear()
void	connectionStateChanged(boolean connected)
int	getPeriod()
protected void	handleError(Throwable e)
boolean	isActive()
boolean	isBound()
protected void	notifyStateListenersError(Throwable t)
protected void	notifyStateListenersState(boolean state)
protected void	realizeAll()
protected void	realizeItem(String itemId)
void	removeItem(String itemId)
void	removeStateListener(AccessStateListener listener)
protected void	start()
protected void	stop()
void	unbind()
protected void	unrealizeAll()
protected void	unrealizeItem(String itemId)
protected void	updateItem(Item item, ItemState itemState)

Methods inherited from class java.lang.Object

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

Field Detail

server

protected Server server

group

protected Group group

active

protected boolean active

items

protected Map<Item,DataCallback> items

Holds the item to callback assignment

itemMap

protected Map<String,Item> itemMap

itemCache

protected Map<Item,ItemState> itemCache

itemSet

protected Map<String,DataCallback> itemSet

logTag

protected String logTag

dataLogger

protected org.slf4j.Logger dataLogger

Constructor Detail

AccessBase

public AccessBase(Server server,
                  int period)
           throws IllegalArgumentException,
                  UnknownHostException,
                  NotConnectedException,
                  JIException,
                  DuplicateGroupException

Throws:

IllegalArgumentException

UnknownHostException

NotConnectedException

JIException

DuplicateGroupException

AccessBase

public AccessBase(Server server,
                  int period,
                  String logTag)

Method Detail

isBound

public boolean isBound()

bind

public void bind()

unbind

public void unbind()
            throws JIException

Throws:

JIException

isActive

public boolean isActive()

addStateListener

public void addStateListener(AccessStateListener listener)

removeStateListener

public void removeStateListener(AccessStateListener listener)

notifyStateListenersState

protected void notifyStateListenersState(boolean state)

notifyStateListenersError

protected void notifyStateListenersError(Throwable t)

getPeriod

public int getPeriod()

addItem

public void addItem(String itemId,
                    DataCallback dataCallback)
             throws JIException,
                    AddFailedException

Throws:

JIException

AddFailedException

removeItem

public void removeItem(String itemId)

connectionStateChanged

public void connectionStateChanged(boolean connected)

Specified by:

connectionStateChanged in interface ServerConnectionStateListener

start

protected void start()
              throws JIException,
                     IllegalArgumentException,
                     UnknownHostException,
                     NotConnectedException,
                     DuplicateGroupException

Throws:

JIException

IllegalArgumentException

UnknownHostException

NotConnectedException

DuplicateGroupException

realizeItem

protected void realizeItem(String itemId)
                    throws JIException,
                           AddFailedException

Throws:

JIException

AddFailedException

unrealizeItem

protected void unrealizeItem(String itemId)

realizeAll

protected void realizeAll()

unrealizeAll

protected void unrealizeAll()

stop

protected void stop()
             throws JIException

Throws:

JIException

clear

public void clear()

updateItem

protected void updateItem(Item item,
                          ItemState itemState)

handleError

protected void handleError(Throwable e)