Package ch.psi.wica.controlsystem.epics.channel

Class EpicsChannelManager

java.lang.Object

ch.psi.wica.controlsystem.epics.channel.EpicsChannelManager

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

EpicsChannelManager.EpicsMonitoredChannelManagerService, EpicsChannelManager.EpicsPolledChannelManagerService

@ThreadSafe
public abstract class EpicsChannelManager
extends Object
implements AutoCloseable

A service which establishes EPICS CA channels on user-specified channels of interest, subsequently publishing changes in the channel's connection state to interested consumers within the application.

@implNote. The current implementation uses PSI's CA EPICS client library to create a single shared EPICS CA Context per class instance. The EPICS CA context and all associated resources are disposed of when the service instance is closed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EpicsChannelManager.EpicsMonitoredChannelManagerService
static class	EpicsChannelManager.EpicsPolledChannelManagerService

Constructor Summary

Constructors

Constructor	Description
EpicsChannelManager(String scope, EpicsChannelAccessContextSupplier epicsChannelAccessContextSupplier, EpicsChannelConnectionChangeSubscriber epicsChannelConnectionChangeSubscriber, EpicsChannelEventPublisher epicsChannelEventPublisher, StatisticsCollectionService statisticsCollectionService)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
void	close()	Disposes of all resources associated with this class instance.
void	createChannel(EpicsChannelName epicsChannelName)
EpicsChannelStatistics	getStatistics()
void	removeChannel(EpicsChannelName epicsChannelName)

Methods inherited from class java.lang.Object

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

Constructor Details

EpicsChannelManager

public EpicsChannelManager(String scope,
 EpicsChannelAccessContextSupplier epicsChannelAccessContextSupplier,
 EpicsChannelConnectionChangeSubscriber epicsChannelConnectionChangeSubscriber,
 EpicsChannelEventPublisher epicsChannelEventPublisher,
 StatisticsCollectionService statisticsCollectionService)

Constructs a new instance.

Parameters:

scope - a String which specifies the scope of this manager.

epicsChannelAccessContextSupplier - an object which can be used to obtain an initialised channel access context appropriate to the needs of the consumer.

epicsChannelConnectionChangeSubscriber - an object which can be used to subscribe to connection state changes.

epicsChannelEventPublisher - an object which publishes events of interest to consumers within the application.

statisticsCollectionService - an object which will collect the statistics associated with this class instance.

Method Details

getStatistics

public EpicsChannelStatistics getStatistics()

createChannel

public void createChannel(EpicsChannelName epicsChannelName)

removeChannel

public void removeChannel(EpicsChannelName epicsChannelName)

close

public void close()

Disposes of all resources associated with this class instance.

Specified by:

close in interface AutoCloseable