org.eclipse.scada.ae.event.logger.internal

Class MasterItemLogger

java.lang.Object

org.eclipse.scada.da.master.AbstractMasterHandlerImpl

org.eclipse.scada.ae.event.logger.internal.MasterItemLogger

All Implemented Interfaces:

MasterItemHandler

public class MasterItemLogger
extends AbstractMasterHandlerImpl

Field Summary

Fields inherited from class org.eclipse.scada.da.master.AbstractMasterHandlerImpl

eventAttributes

Constructor Summary

Constructors

Constructor and Description
MasterItemLogger(org.osgi.framework.BundleContext context, ObjectPoolTracker<MasterItem> poolTracker, int priority)

Method Summary

Modifier and Type	Method and Description
protected Event.EventBuilder	createEvent(WriteRequest request)
void	dataUpdate(Map<String,Object> context, DataItemValue.Builder value) Called when data changed or the handler chain changed.
void	dispose()
protected Variant	formatAttributes(Map<String,Variant> attributes)
WriteRequestResult	processWrite(WriteRequest request) Process the write request
void	update(UserInformation userInformation, Map<String,String> parameters)

Methods inherited from class org.eclipse.scada.da.master.AbstractMasterHandlerImpl

addItem, createTrackers, getMasterItems, removeItem, reprocess

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterItemLogger

public MasterItemLogger(org.osgi.framework.BundleContext context,
                        ObjectPoolTracker<MasterItem> poolTracker,
                        int priority)
                 throws org.osgi.framework.InvalidSyntaxException

Throws:

org.osgi.framework.InvalidSyntaxException

Method Detail

dispose

public void dispose()

Overrides:

dispose in class AbstractMasterHandlerImpl

dataUpdate

public void dataUpdate(Map<String,Object> context,
                       DataItemValue.Builder value)

Description copied from interface: MasterItemHandler

Called when data changed or the handler chain changed.

The call gets a context object provided which each handler can use to store context information of one calculation run. Each calculation run gets a fresh new context. The context is intended to pass data from one handler to the next.

Although the value parameter is a mutable type, the handler may only make changes inside the dataUpdate method.

Specified by:

dataUpdate in interface MasterItemHandler

Specified by:

dataUpdate in class AbstractMasterHandlerImpl

Parameters:

context - the context object

value - the changed value

update

public void update(UserInformation userInformation,
                   Map<String,String> parameters)
            throws Exception

Overrides:

update in class AbstractMasterHandlerImpl

Throws:

Exception

processWrite

public WriteRequestResult processWrite(WriteRequest request)

Description copied from class: AbstractMasterHandlerImpl

Process the write request

This implementation does nothing and can be overridden by derived implementations.

Specified by:

processWrite in interface MasterItemHandler

Overrides:

processWrite in class AbstractMasterHandlerImpl

Parameters:

request - the write request to handle

Returns:

the resulting write request

formatAttributes

protected Variant formatAttributes(Map<String,Variant> attributes)

createEvent

protected Event.EventBuilder createEvent(WriteRequest request)