jca
Class Ca

java.lang.Object
  |
  +--jca.Ca

Deprecated. Use gov.apsjca.Ca instead.

public final class Ca

extends java.lang.Object

The Java Channel Access class.

See Also:

PV, Monitor

Field Summary

protected static java.util.Vector	_queue Deprecated.
protected static gov.aps.epics.jca.Context	_theContext Deprecated.
static int	OP_ADD_EVENT Deprecated.
static int	OP_CLEAR_EVENT Deprecated.
static int	OP_CONN_DOWN Deprecated.
static int	OP_CONN_UP Deprecated.
static int	OP_GET Deprecated.
static int	OP_OTHER Deprecated.
static int	OP_PUT Deprecated.
static int	OP_SEARCH Deprecated.

Constructor Summary

Ca()
Deprecated.

Method Summary

protected static void	clearQueue() Deprecated.
static void	exit() Deprecated. Frees all CA resources and exits the Channel Access thread
protected void	finalize() Deprecated.
static void	flushIO() Deprecated. Sends all buffered IO requests.
protected static void	get(jca.PV pv, jca.dbr.DBR ivalue) Deprecated.
protected static gov.aps.epics.jca.Context	getContext() Deprecated.
static void	init() Deprecated. Initializes the Channel Access threads.
static void	init(int requestPriority, int eventPriority) Deprecated.
static void	pendEvent(double period) Deprecated. Flushes the send buffer and waits for asynchronous event.
static void	pendIO(double timeout) Deprecated. Flushes the send buffer and waits until outstanding queries complete.

Methods inherited from class java.lang.Object

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

Field Detail

OP_GET

public static final int OP_GET

Deprecated.

See Also:

Constant Field Values

OP_PUT

public static final int OP_PUT

Deprecated.

See Also:

Constant Field Values

OP_SEARCH

public static final int OP_SEARCH

Deprecated.

See Also:

Constant Field Values

OP_ADD_EVENT

public static final int OP_ADD_EVENT

Deprecated.

See Also:

Constant Field Values

OP_CLEAR_EVENT

public static final int OP_CLEAR_EVENT

Deprecated.

See Also:

Constant Field Values

OP_OTHER

public static final int OP_OTHER

Deprecated.

See Also:

Constant Field Values

OP_CONN_UP

public static final int OP_CONN_UP

Deprecated.

See Also:

Constant Field Values

OP_CONN_DOWN

public static final int OP_CONN_DOWN

Deprecated.

See Also:

Constant Field Values

_theContext

protected static gov.aps.epics.jca.Context _theContext

Deprecated.

_queue

protected static java.util.Vector _queue

Deprecated.

Constructor Detail

Ca

public Ca()

Deprecated.

Method Detail

init

public static void init()

Deprecated.

Initializes the Channel Access threads.

init

public static void init(int requestPriority,
                        int eventPriority)

Deprecated.

exit

public static void exit()

Deprecated.

Frees all CA resources and exits the Channel Access thread

flushIO

public static void flushIO()

Deprecated.

Sends all buffered IO requests. Usually performed by pendIO or pendEvent. However, some users may wish to flush remote operation requests early so that they can perform operations in parallel with outstanding remote operations.

See Also:

pendEvent(double), pendIO(double)

pendIO

public static void pendIO(double timeout)
                   throws TimeOutException

Deprecated.

Flushes the send buffer and waits until outstanding queries complete. At this time queries include calls to PV(name) and PV.get(value).

Comments: Any values written into your program's variables by a CA synchronous request should not be referenced by your program until Ca.pendIO() has been called.

Parameters:

timeout - time in seconds to wait before the function times out. A timeout of zero means wait forever.

Throws:

TimeOutException - The timeout has expire and all outstanding queries were not completed.

pendEvent

public static void pendEvent(double period)

Deprecated.

Flushes the send buffer and waits for asynchronous event. Asynchronous event include all call to PV(name,listener), PV.get(value,listener), PV.put(value,listener) and all monitors events. This routine will not return before the period expires and all unfinished channel access labor has been processed.

Comments: A very short timeout such as 0.0001 seconds will result in a poll (i.e. channel access will just check for file descriptor activity and then return).

Parameters:

period - time in seconds to wait before the function returns. A period of zero means wait forever.

clearQueue

protected static void clearQueue()

Deprecated.

get

protected static void get(jca.PV pv,
                          jca.dbr.DBR ivalue)
                   throws BadTypeException,
                          BadCountException,
                          GetFailException

Deprecated.

BadTypeException

BadCountException

GetFailException

getContext

protected static gov.aps.epics.jca.Context getContext()

Deprecated.

finalize

protected void finalize()
                 throws java.lang.Throwable

Deprecated.

Overrides:

finalize in class java.lang.Object

java.lang.Throwable