org.eclipse.scada.da.client

Class ItemManagerImpl

java.lang.Object

org.eclipse.scada.da.client.ItemManagerImpl

All Implemented Interfaces:

ConnectionStateListener, ItemManager

public class ItemManagerImpl
extends Object
implements ConnectionStateListener, ItemManager

Field Summary

Fields

Modifier and Type	Field and Description
protected Connection	connection

Constructor Summary

Constructors

Constructor and Description
ItemManagerImpl(Connection connection) Create a new item manager.

Method Summary

Modifier and Type	Method and Description
void	addItemUpdateListener(String itemName, ItemUpdateListener listener)
protected void	disconnectAllItems()
Connection	getConnection() Get the current assigned connection
Executor	getExecutor()
void	removeItemUpdateListener(String itemName, ItemUpdateListener listener)
protected void	resyncAllItems() Synchronized all items that are currently known
void	stateChange(Connection connection, ConnectionState state, Throwable error) Notify a state change

Methods inherited from class java.lang.Object

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

Field Detail

connection

protected Connection connection

Constructor Detail

ItemManagerImpl

public ItemManagerImpl(Connection connection)

Create a new item manager.

Only one item manager should be created per connection since the item manager acquires the listeners for data items using Connection.setItemUpdateListener(String, ItemUpdateListener) which directs all further updates to this item manager an disconnects all other item managers. So item managers should be shared.

Parameters:

connection - the new connection to use for this item manager

Method Detail

getExecutor

public Executor getExecutor()

getConnection

public Connection getConnection()

Get the current assigned connection

Returns:

the current connection or null if none is assigned.

addItemUpdateListener

public void addItemUpdateListener(String itemName,
                                  ItemUpdateListener listener)

Specified by:

addItemUpdateListener in interface ItemManager

removeItemUpdateListener

public void removeItemUpdateListener(String itemName,
                                     ItemUpdateListener listener)

Specified by:

removeItemUpdateListener in interface ItemManager

resyncAllItems

protected void resyncAllItems()

Synchronized all items that are currently known

disconnectAllItems

protected void disconnectAllItems()

stateChange

public void stateChange(Connection connection,
                        ConnectionState state,
                        Throwable error)

Description copied from interface: ConnectionStateListener

Notify a state change

Specified by:

stateChange in interface ConnectionStateListener

Parameters:

connection - the connection that changed

state - the new state of the connection

error - some error information that lead to the new state (can be null if it was not an error)