com.cosylab.epics.caj.impl.requests
Class AbstractCARequest

java.lang.Object
  com.cosylab.epics.caj.impl.requests.AbstractCARequest

All Implemented Interfaces:

Request

Direct Known Subclasses:

AccessRightsRequest, BeaconRequest, ClearChannelRequest, ClearChannelRequest, CreateChannelFailedRequest, CreateChannelRequest, CreateChannelRequest, EchoRequest, EchoRequest, EventAddRequest, EventAddRequest, EventCancelRequest, EventCancelRequest, EventsOffRequest, EventsOnRequest, ExceptionRequest, HostNameRequest, ReadNotifyRequest, ReadNotifyRequest, RepeaterRegisterRequest, SearchFailedRequest, SearchRequest, SearchRequest, SubscriptionUpdateRequest, UserNameRequest, VersionRequest, WriteNotifyRequest, WriteNotifyRequest, WriteRequest

public abstract class AbstractCARequest
extends Object
implements Request

Version:

$id$

Author:

Matej Sekoranja

Field Summary

protected ByteBuffer	requestMessage Request message.
protected Transport	transport Transport to be used when sending.

Fields inherited from interface com.cosylab.epics.caj.impl.Request

DEFAULT_USER_PRIORITY, MAX_USER_PRIORITY, MIN_USER_PRIORITY, SEND_IMMEDIATELY_PRIORITY

Constructor Summary

AbstractCARequest(Transport transport)

Method Summary

static ByteBuffer	alignBuffer(int align, ByteBuffer buffer) Fills buffer to become aligned.
static int	calculateAlignedSize(int align, int nonAlignedSize) Calculates aligned sice.
ByteBuffer	generateRequestMessage() Generates (new instance) new request message.
byte	getPriority() Return default priority.
ByteBuffer	getRequestMessage() Get request message to be sent.
static ByteBuffer	insertCAHeader(Transport transport, ByteBuffer buffer, short command, int payloadSize, short dataType, int dataCount, int parameter1, int parameter2) Inserts CA header to the buffer.
void	submit() Submit request to the corresponding transport.

Methods inherited from class java.lang.Object

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

Field Detail

requestMessage

protected ByteBuffer requestMessage

Request message.

transport

protected Transport transport

Transport to be used when sending.

Constructor Detail

AbstractCARequest

public AbstractCARequest(Transport transport)

Parameters:

transport - transport to be used when sending.

Method Detail

getPriority

public byte getPriority()

Return default priority.

Specified by:

getPriority in interface Request

Returns:

request priority.

See Also:

Request.getPriority()

getRequestMessage

public ByteBuffer getRequestMessage()

Description copied from interface: Request

Get request message to be sent.

Specified by:

getRequestMessage in interface Request

Returns:

request message to be sent.

See Also:

Request.getRequestMessage()

generateRequestMessage

public ByteBuffer generateRequestMessage()

Generates (new instance) new request message. Used if requestMessage not yet set - lazy message generation.

Returns:

generated request message.

See Also:

Request.getRequestMessage()

submit

public void submit()
            throws IOException

Submit request to the corresponding transport.

Specified by:

submit in interface Request

Throws:

IOException

See Also:

Request.submit()

insertCAHeader

public static ByteBuffer insertCAHeader(Transport transport,
                                        ByteBuffer buffer,
                                        short command,
                                        int payloadSize,
                                        short dataType,
                                        int dataCount,
                                        int parameter1,
                                        int parameter2)

Inserts CA header to the buffer.

Parameters:

transport - transport to be used when sending.

buffer - buffer to be filled, can be null.

Returns:

filled buffer, if given buffer size is less that header size, then new buffer is allocated and returned.

alignBuffer

public static ByteBuffer alignBuffer(int align,
                                     ByteBuffer buffer)

Fills buffer to become aligned. ByteBuffer.position() is aligned.

Parameters:

align - alignment to be used

buffer - buffer to be filled, non-null.

Returns:

filled buffer, if given buffer size is less that aligned size, then new buffer is allocated and returned.

calculateAlignedSize

public static int calculateAlignedSize(int align,
                                       int nonAlignedSize)

Calculates aligned sice.

Parameters:

align - alignment to be used

nonAlignedSize - current non-aligned size

Returns:

aligned size.