@Override
public void updateTotalMetaInfo() throws IllegalStateException, CAException {
GetListener getListener =
new GetListener() {
@Override
public void getCompleted(final GetEvent event) {
// This runs in a CA thread
if (event.getStatus().isSuccessful()) {
state = PVConnectionState.GotMetaData;
final DBR dbr = event.getDBR();
logger.debug("Updating metadata (EGU/PREC etc) for pv " + EPICS_V3_PV.this.name);
totalMetaInfo.applyBasicInfo(
EPICS_V3_PV.this.name, dbr, EPICS_V3_PV.this.configservice);
} else {
logger.error("The meta get listener was not successful for EPICS_V3_PV " + name);
}
}
};
if (channel_ref != null) {
if (channel_ref.getChannel().getConnectionState() == ConnectionState.CONNECTED) {
DBRType type = channel_ref.getChannel().getFieldType();
if (!(plain || type.isSTRING())) {
state = PVConnectionState.GettingMetadata;
if (type.isDOUBLE() || type.isFLOAT()) type = DBRType.CTRL_DOUBLE;
else if (type.isENUM()) type = DBRType.LABELS_ENUM;
else if (type.isINT()) type = DBRType.CTRL_INT;
else type = DBRType.CTRL_SHORT;
channel_ref.getChannel().get(type, 1, getListener);
}
}
}
}
/** @return TIME_... type for this channel. */
public static DBRType getTimeType(final boolean plain, final DBRType type) {
if (type.isDOUBLE()) return plain ? DBRType.DOUBLE : DBRType.TIME_DOUBLE;
else if (type.isFLOAT()) return plain ? DBRType.FLOAT : DBRType.TIME_FLOAT;
else if (type.isINT()) return plain ? DBRType.INT : DBRType.TIME_INT;
else if (type.isSHORT()) return plain ? DBRType.SHORT : DBRType.TIME_SHORT;
else if (type.isENUM()) return plain ? DBRType.SHORT : DBRType.TIME_ENUM;
else if (type.isBYTE()) return plain ? DBRType.BYTE : DBRType.TIME_BYTE;
// default: get as string
return plain ? DBRType.STRING : DBRType.TIME_STRING;
}
/** PV is connected. Get meta info, or subscribe right away. */
private void handleConnected(final Channel channel) {
try {
if (channel.getConnectionState() != Channel.CONNECTED) {
return;
}
} catch (Exception ex) {
logger.warn("Exception handling connection state change for " + this.name, ex);
return;
}
if (state == PVConnectionState.Connected) return;
state = PVConnectionState.Connected;
hostName = channel_ref.getChannel().getHostName();
totalMetaInfo.setHostName(hostName);
for (final PVListener listener : listeners) {
listener.pvConnected(this);
}
// If we're "running", we need to get the meta data and
// then subscribe.
// Otherwise, we're done.
if (!running) {
connected = true;
// meta = null;
synchronized (this) {
this.notifyAll();
}
return;
}
// else: running, get meta data, then subscribe
try {
DBRType type = channel.getFieldType();
if (!(plain || type.isSTRING())) {
state = PVConnectionState.GettingMetadata;
if (type.isDOUBLE() || type.isFLOAT()) type = DBRType.CTRL_DOUBLE;
else if (type.isENUM()) type = DBRType.LABELS_ENUM;
else if (type.isINT()) type = DBRType.CTRL_INT;
else type = DBRType.CTRL_SHORT;
channel.get(type, 1, meta_get_listener);
return;
}
} catch (final Exception ex) {
logger.error("exception when handleConnect " + name, ex);
return;
}
// Meta info is not requested, not available for this type,
// or there was an error in the get call.
// So reset it, then just move on to the subscription.
// meta = null;
subscribe();
}
private static boolean dbrTypeMatch(DBRType aType, DBRType anotherType) {
if (aType.getClass() == null && anotherType.getClass() != null) {
return false;
}
if (aType.getClass() != null && anotherType.getClass() == null) {
return false;
}
return aType.isBYTE() && anotherType.isBYTE()
|| aType.isDOUBLE() && anotherType.isDOUBLE()
|| aType.isENUM() && anotherType.isENUM()
|| aType.isFLOAT() && anotherType.isFLOAT()
|| aType.isINT() && anotherType.isINT()
|| aType.isSHORT() && anotherType.isSHORT()
|| aType.isSTRING() && anotherType.isSTRING();
}
