Package org.epics.pvaccess.client

Interface ChannelProvider

All Known Implementing Classes:

RPCChannelProvider

public interface ChannelProvider

Interface implemented by code that can provide access to the record to which a channel connects.

Author:

mrk

Field Summary

Fields

Modifier and Type	Field	Description
static short	PRIORITY_ARCHIVE	Archive priority.
static short	PRIORITY_DEFAULT	Default priority.
static short	PRIORITY_LINKS_DB	DB links priority.
static short	PRIORITY_MAX	Maximal priority.
static short	PRIORITY_MIN	Minimal priority.
static short	PRIORITY_OPI	OPI priority.

Method Summary

Modifier and Type	Method	Description
ChannelFind	channelFind(String channelName, ChannelFindRequester channelFindRequester)	Find a channel.
ChannelFind	channelList(ChannelListRequester channelListRequester)	Find a channel.
Channel	createChannel(String channelName, ChannelRequester channelRequester, short priority)	Create a channel.
Channel	createChannel(String channelName, ChannelRequester channelRequester, short priority, String address)	Create a channel.
void	destroy()	Terminate.
String	getProviderName()	Get the provider name.

Field Detail

PRIORITY_MIN

static final short PRIORITY_MIN

Minimal priority.

See Also:

Constant Field Values

PRIORITY_MAX

static final short PRIORITY_MAX

Maximal priority.

See Also:

Constant Field Values

PRIORITY_DEFAULT

static final short PRIORITY_DEFAULT

Default priority.

See Also:

Constant Field Values

PRIORITY_LINKS_DB

static final short PRIORITY_LINKS_DB

DB links priority.

See Also:

Constant Field Values

PRIORITY_ARCHIVE

static final short PRIORITY_ARCHIVE

Archive priority.

See Also:

Constant Field Values

PRIORITY_OPI

static final short PRIORITY_OPI

OPI priority.

See Also:

Constant Field Values

Method Detail

destroy

void destroy()

Terminate.

getProviderName

String getProviderName()

Get the provider name.

Returns:

The name.

channelFind

ChannelFind channelFind(String channelName,
                        ChannelFindRequester channelFindRequester)

Find a channel.

Parameters:

channelName - The channel name.

channelFindRequester - The requester.

Returns:

An interface for the find.

channelList

ChannelFind channelList(ChannelListRequester channelListRequester)

Find a channel.

Parameters:

channelListRequester - The requester.

Returns:

An interface for the find.

createChannel

Channel createChannel(String channelName,
                      ChannelRequester channelRequester,
                      short priority)

Create a channel.

Parameters:

channelName - The name of the channel.

channelRequester - The requester.

priority - channel priority, must be PRIORITY_MIN ≤ priority ≤ PRIORITY_MAX.

Returns:

Channel instance. If channel does not exist null is returned and channelRequester notified.

createChannel

Channel createChannel(String channelName,
                      ChannelRequester channelRequester,
                      short priority,
                      String address)

Create a channel.

Parameters:

channelName - The name of the channel.

channelRequester - The requester.

priority - channel priority, must be PRIORITY_MIN ≤ priority ≤ PRIORITY_MAX.

address - address (or list of addresses) where to look for a channel. Implementation independent string.

Returns:

Channel instance. If channel does not exist null is returned and channelRequester notified.