Package org.epics.ca

Class BaseV3ChannelGet

java.lang.Object

org.epics.ca.BaseV3ChannelGet

All Implemented Interfaces:

gov.aps.jca.event.ConnectionListener, gov.aps.jca.event.GetListener, EventListener, ChannelGet, ChannelRequest, Lockable, org.epics.pvdata.misc.Destroyable

public class BaseV3ChannelGet
extends Object
implements ChannelGet, gov.aps.jca.event.GetListener, gov.aps.jca.event.ConnectionListener

Base class that implements ChannelGet for communicating with a V3 IOC.

Author:

mrk

Constructor Summary

Constructors

Constructor	Description
BaseV3ChannelGet(ChannelGetRequester channelGetRequester, V3Channel v3Channel, org.epics.pvdata.pv.PVStructure pvRequest)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	cancel()	Cancel any pending request.
void	connectionChanged(gov.aps.jca.event.ConnectionEvent event)
void	destroy()
void	get()	Get data from the channel.
Channel	getChannel()	Get a channel instance this request belongs to.
void	getCompleted(gov.aps.jca.event.GetEvent getEvent)
String	getRequesterName()
void	lastRequest()	Announce next request as last request.
void	lock()
void	message(String message, org.epics.pvdata.pv.MessageType messageType)
void	unlock()

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseV3ChannelGet

public BaseV3ChannelGet(ChannelGetRequester channelGetRequester,
                        V3Channel v3Channel,
                        org.epics.pvdata.pv.PVStructure pvRequest)

Constructor.

Parameters:

channelGetRequester - The channelGetRequester.

v3Channel - The V3Channel

pvRequest - The request structure.

Method Detail

destroy

public void destroy()

Specified by:

destroy in interface org.epics.pvdata.misc.Destroyable

get

public void get()

Description copied from interface: ChannelGet

Get data from the channel. Completion status is reported by calling ChannelGetRequester.getDone() callback.

Specified by:

get in interface ChannelGet

getRequesterName

public String getRequesterName()

message

public void message(String message,
                    org.epics.pvdata.pv.MessageType messageType)

getCompleted

public void getCompleted(gov.aps.jca.event.GetEvent getEvent)

Specified by:

getCompleted in interface gov.aps.jca.event.GetListener

connectionChanged

public void connectionChanged(gov.aps.jca.event.ConnectionEvent event)

Specified by:

connectionChanged in interface gov.aps.jca.event.ConnectionListener

lock

public void lock()

Specified by:

lock in interface Lockable

unlock

public void unlock()

Specified by:

unlock in interface Lockable

cancel

public void cancel()

Description copied from interface: ChannelRequest

Cancel any pending request. Completion will be reported via request's response callback:

• if cancel() request is issued after the request was already complete, request success/failure completion will be reported and cancel() request ignored.
• if the request was actually canceled, cancellation completion is reported.

Specified by:

cancel in interface ChannelRequest

lastRequest

public void lastRequest()

Description copied from interface: ChannelRequest

Announce next request as last request. When last request will be completed (regardless of completion status) the remote and local instance will be destroyed.

Specified by:

lastRequest in interface ChannelRequest

getChannel

public Channel getChannel()

Description copied from interface: ChannelRequest

Get a channel instance this request belongs to.

Specified by:

getChannel in interface ChannelRequest

Returns:

the channel instance.