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(BundleContext context, poolTracker, int priority)

Method Summary

Methods

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

Throws:

InvalidSyntaxException

Method Detail

dispose

public void dispose()

Overrides:

dispose in class AbstractMasterHandlerImpl

dataUpdate

public void dataUpdate(java.util.Map<java.lang.String,java.lang.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,
          java.util.Map<java.lang.String,java.lang.String> parameters)
            throws java.lang.Exception

Overrides:

update in class AbstractMasterHandlerImpl

Throws:

java.lang.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(java.util.Map<java.lang.String,Variant> attributes)

createEvent

protected Event.EventBuilder createEvent(WriteRequest request)