org.eclipse.scada.ds

Interface DataStore

All Known Implementing Classes:

AbstractStorage

public interface DataStore

A data store service interface

Since:

0.15.0

Method Summary

Methods

Modifier and Type	Method and Description
void	attachListener(String nodeId, DataListener listener) Attach a listener to a data node
org.eclipse.scada.utils.concurrent.NotifyFuture<Void>	deleteNode(String nodeId)
void	detachListener(String nodeId, DataListener listener)
org.eclipse.scada.utils.concurrent.NotifyFuture<DataNode>	readNode(String nodeId) Get the data node
org.eclipse.scada.utils.concurrent.NotifyFuture<Void>	writeNode(DataNode node)

Method Detail

attachListener

void attachListener(String nodeId,
                  DataListener listener)

Attach a listener to a data node

The listener is called with the current status of the node when attaching.

Parameters:

nodeId - the node id to attach to

listener - the listener that will receive events

detachListener

void detachListener(String nodeId,
                  DataListener listener)

deleteNode

org.eclipse.scada.utils.concurrent.NotifyFuture<Void> deleteNode(String nodeId)

writeNode

org.eclipse.scada.utils.concurrent.NotifyFuture<Void> writeNode(DataNode node)

readNode

org.eclipse.scada.utils.concurrent.NotifyFuture<DataNode> readNode(String nodeId)

Get the data node

Parameters:

nodeId - the id of the node to get

Returns:

the future to the read request. The future will return null if the node does not exists.