Package org.epics.pvaccess.client.impl.remote

Class ChannelGetFieldRequestImpl

java.lang.Object

org.epics.pvaccess.client.impl.remote.ChannelGetFieldRequestImpl

All Implemented Interfaces:

Lockable, DataResponse, ResponseRequest, TransportSender

public class ChannelGetFieldRequestImpl
extends Object
implements DataResponse, TransportSender

PVA get field request.

Version:

$Id$

Author:

Matej Sekoranja

Field Summary

Fields

Modifier and Type	Field	Description
protected GetFieldRequester	callback	Response callback listener.
protected ChannelImpl	channel	Channel.
protected ClientContextImpl	context	Context.
protected boolean	destroyed	Destroyed flag.
protected int	ioid	I/O ID given by the context when registered.
protected String	subField	Sub-field name.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ChannelGetFieldRequestImpl(ChannelImpl channel, GetFieldRequester callback, String subField)

Method Summary

Modifier and Type	Method	Description
protected void	activate()
void	cancel()	Cancel response request.
static ChannelGetFieldRequestImpl	create(ChannelImpl channel, GetFieldRequester callback, String subField)
void	destroy()
int	getIOID()	Get I/O ID.
org.epics.pvdata.pv.Requester	getRequester()	Get request requester.
void	lock()
void	reportStatus(org.epics.pvdata.pv.Status status)	Report status to clients (e.g.
void	response(Transport transport, byte version, ByteBuffer payloadBuffer)	Notification response.
void	send(ByteBuffer buffer, TransportSendControl control)	Called by transport.
void	timeout()	Timeout notification.
void	unlock()

Methods inherited from class java.lang.Object

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

Field Detail

channel

protected final ChannelImpl channel

Channel.

context

protected final ClientContextImpl context

Context.

ioid

protected final int ioid

I/O ID given by the context when registered.

callback

protected final GetFieldRequester callback

Response callback listener.

subField

protected final String subField

Sub-field name.

destroyed

protected volatile boolean destroyed

Destroyed flag.

Constructor Detail

ChannelGetFieldRequestImpl

protected ChannelGetFieldRequestImpl(ChannelImpl channel,
                                     GetFieldRequester callback,
                                     String subField)

Method Detail

create

public static ChannelGetFieldRequestImpl create(ChannelImpl channel,
                                                GetFieldRequester callback,
                                                String subField)

activate

protected void activate()

lock

public void lock()

Specified by:

lock in interface Lockable

send

public void send(ByteBuffer buffer,
                 TransportSendControl control)

Description copied from interface: TransportSender

Called by transport. By this call transport gives callee ownership over the buffer. Calls on TransportSendControl instance must be made from calling thread. Moreover, ownership is valid only for the time of call of this method. NOTE: these limitations allow efficient implementation.

Specified by:

send in interface TransportSender

Parameters:

buffer - buffer to send.

control - transport send control instance.

unlock

public void unlock()

Specified by:

unlock in interface Lockable

getIOID

public int getIOID()

Description copied from interface: ResponseRequest

Get I/O ID.

Specified by:

getIOID in interface ResponseRequest

Returns:

ioid

getRequester

public org.epics.pvdata.pv.Requester getRequester()

Description copied from interface: ResponseRequest

Get request requester.

Specified by:

getRequester in interface ResponseRequest

Returns:

request requester.

response

public void response(Transport transport,
                     byte version,
                     ByteBuffer payloadBuffer)

Description copied from interface: DataResponse

Notification response.

Specified by:

response in interface DataResponse

Parameters:

transport - transport to use.

version - protocol version.

payloadBuffer - the data.

cancel

public void cancel()

Description copied from interface: ResponseRequest

Cancel response request.

Specified by:

cancel in interface ResponseRequest

destroy

public void destroy()

timeout

public void timeout()

Description copied from interface: ResponseRequest

Timeout notification.

Specified by:

timeout in interface ResponseRequest

reportStatus

public void reportStatus(org.epics.pvdata.pv.Status status)

Description copied from interface: ResponseRequest

Report status to clients (e.g. disconnected).

Specified by:

reportStatus in interface ResponseRequest

Parameters:

status - to report.