org.eclipse.scada.da.master.common.sum

Class CommonSumHandler

java.lang.Object

org.eclipse.scada.da.master.AbstractMasterHandlerImpl

org.eclipse.scada.da.master.common.sum.CommonSumHandler

All Implemented Interfaces:

MasterItemHandler

public class CommonSumHandler
extends AbstractMasterHandlerImpl

Field Summary

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

eventAttributes

Constructor Summary

Constructors

Constructor and Description
CommonSumHandler(ObjectPoolTracker<MasterItem> poolTracker)

Method Summary

Methods

Modifier and Type	Method and Description
void	dataUpdate(Map<String,Object> context, DataItemValue.Builder builder) Called when data changed or the handler chain changed.
void	update(UserInformation userInformation, Map<String,String> parameters)

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

addItem, createTrackers, dispose, getMasterItems, processWrite, removeItem, reprocess

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonSumHandler

public CommonSumHandler(ObjectPoolTracker<MasterItem> poolTracker)

Method Detail

update

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

Overrides:

update in class AbstractMasterHandlerImpl

Throws:

Exception

dataUpdate

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

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

builder - the changed value