Modifier and Type | Method and Description |
---|---|
void |
addPVReaderListener(Class<?> clazz,
PVReaderListener listener)
Adds a listener to the value, which is notified only if the value is
of a given type.
|
void |
addPVReaderListener(PVReaderListener listener)
Adds a listener to the value.
|
void |
addPVWriterListener(PVWriterListener listener)
Adds a listener to the value.
|
void |
close()
De-registers all listeners, stops all notifications and closes all
connections from the data sources needed by this.
|
String |
getName()
Returns the name of the PVReader.
|
R |
getValue()
Returns the value of the PVReader.
|
boolean |
isClosed()
True if no more notifications are going to be sent for this PVReader.
|
boolean |
isConnected()
True if the reader is connected.
|
boolean |
isPaused()
Whether the reader is paused.
|
Exception |
lastException()
Returns the last exception that was generated preparing the value
for this PVReader and clears it (subsequent call will return null).
|
Exception |
lastWriteException()
Returns the last exception that was generated by write operations
and clears it (subsequent call will return null).
|
void |
removePVReaderListener(PVReaderListener listener)
Removes a listener to the value.
|
void |
removePVWriterListener(PVWriterListener listener)
Removes a listener to the value.
|
void |
setPaused(boolean paused)
Pauses or resumes the reader notifications.
|
void |
write(W newValue)
Writes a new value.
|
public void addPVWriterListener(PVWriterListener listener)
PVWriter
addPVWriterListener
in interface PVWriter<W>
listener
- a new listenerpublic void removePVWriterListener(PVWriterListener listener)
PVWriter
removePVWriterListener
in interface PVWriter<W>
listener
- the old listenerpublic void write(W newValue)
PVWriter
public Exception lastWriteException()
PVWriter
lastWriteException
in interface PVWriter<W>
public void addPVReaderListener(PVReaderListener listener)
PVReader
addPVReaderListener
in interface PVReader<R>
listener
- a new listenerpublic void addPVReaderListener(Class<?> clazz, PVReaderListener listener)
PVReader
addPVReaderListener
in interface PVReader<R>
clazz
- type to filter notifications forlistener
- a new listenerpublic void removePVReaderListener(PVReaderListener listener)
PVReader
removePVReaderListener
in interface PVReader<R>
listener
- the old listenerpublic String getName()
PVReader
public R getValue()
PVReader
PVReaderListener
.public void close()
PVReader
public boolean isClosed()
PVReader
public Exception lastException()
PVReader
lastException
in interface PVReader<R>
public boolean isPaused()
PVReader
public void setPaused(boolean paused)
PVReader
Note that since notifications may still be in flight, you may receive notifications after setting the pause state to on. The paused flag on the reader, though, is changed immediately.
public boolean isConnected()
PVReader
Currently, a reader is defined as connected if all the channels are connected. This means that you still may get updates even if this method returns false. You can use this method to determine whether your notification comes from a complete set.
When using VType
s, you should use the Alarm
interface to
get the connection status. This scales when you get aggregates, such
as lists or maps of channels. This method does obviously not scale functionally
since, in an aggregate, it can't tell you which channel of the set
is connected or not.
isConnected
in interface PVReader<R>
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