/**
* Combine the metadata from various sources and return the latest copy.
*
* @return
*/
@Override
public HashMap<String, String> getLatestMetadata() {
HashMap<String, String> retVal = new HashMap<String, String>();
// The totalMetaInfo is updated once every 24hours...
MetaInfo metaInfo = this.getTotalMetaInfo();
if (metaInfo != null) {
metaInfo.addToDict(retVal);
}
// Add the latest value of the fields we are monitoring.
if (allarchiveFieldsData != null) {
retVal.putAll(allarchiveFieldsData);
}
if (runTimeFieldsData != null) {
retVal.putAll(runTimeFieldsData);
}
return retVal;
}
/** 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();
}
/** Subscribe for value updates. */
private void subscribe() {
synchronized (this) {
// Prevent multiple subscriptions.
if (subscription != null) {
return;
}
// Late callback, channel already closed?
final RefCountedChannel ch_ref = channel_ref;
if (ch_ref == null) {
return;
}
final Channel channel = ch_ref.getChannel();
// final Logger logger = Activator.getLogger();
try {
if (channel.getConnectionState() != Channel.CONNECTED) {
return;
}
//
// the RefCountedChannel should maintain a single
// subscription to the underlying CAJ/JCA channel.
// So even with N PVs for the same channel, it's
// only one subscription on the network instead of
// N subscriptions.
final DBRType type = DBR_Helper.getTimeType(plain, channel.getFieldType());
state = PVConnectionState.Subscribing;
totalMetaInfo.setStartTime(System.currentTimeMillis());
// isnotTimestampDBR
if (this.name.endsWith(".RTYP")) {
subscription = channel.addMonitor(MonitorMask.ARCHIVE.getMask(), this);
} else {
subscription =
channel.addMonitor(
type, channel.getElementCount(), MonitorMask.ARCHIVE.getMask(), this);
}
} catch (final Exception ex) {
logger.error("exception when subscribing pv " + name, ex);
}
}
}
@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();
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);
}
PVContext.scheduleCommand(
EPICS_V3_PV.this.name,
EPICS_V3_PV.this.jcaCommandThreadId,
EPICS_V3_PV.this.channel_ref,
"getCompleted",
new Runnable() {
@Override
public void run() {
subscribe();
}
});
}
/** MonitorListener interface. */
@Override
public void monitorChanged(final MonitorEvent ev) {
// final Logger log = Activator.getLogger();
// This runs in a CA thread.
// Ignore values that arrive after stop()
if (!running) {
return;
}
if (subscription == null) {
return;
}
if (ev.getStatus() == null || !ev.getStatus().isSuccessful()) {
return;
}
if (controlledPVList != null) {
// this pv is control pv.
try {
updateAllControlPVEnablMent(ev);
} catch (Exception e) {
logger.error(
"exception in monitor changed function when updatinng controlled pvs' enablement for "
+ this.name,
e);
}
return;
}
state = PVConnectionState.GotMonitor;
if (!connected) connected = true;
try {
try {
DBR dbr = ev.getDBR();
if (dbr == null) {
return;
}
if (this.name.endsWith(".RTYP")) {
String rtypName = (((DBR_String) dbr).getStringValue())[0];
dbrtimeevent =
new POJOEvent(
ArchDBRTypes.DBR_SCALAR_STRING,
TimeUtils.now(),
new ScalarStringSampleValue(rtypName),
0,
0);
return;
}
// dbr.printInfo();
ArchDBRTypes generatedDBRType = JCA2ArchDBRType.valueOf(dbr);
if (archDBRType == null) {
archDBRType = generatedDBRType;
con = configservice.getArchiverTypeSystem().getJCADBRConstructor(archDBRType);
} else {
assert (con != null);
if (generatedDBRType != archDBRType) {
logger.warn(
"The type of PV "
+ this.name
+ " has changed from "
+ archDBRType
+ " to "
+ generatedDBRType);
fireDroppedSample(PVListener.DroppedReason.TYPE_CHANGE);
return;
}
}
dbrtimeevent = con.newInstance(dbr);
totalMetaInfo.computeRate(dbrtimeevent);
dbr = null;
} catch (Exception e) {
logger.error(
"exception in monitor changed function when converting DBR to dbrtimeevent for pv "
+ this.name,
e);
}
updataMetaDataInParentPV(dbrtimeevent);
// if this pv has meta data , handle here
if (hasMetaField) {
// //////////handle the field value when it
// changes//////////////
if (changedarchiveFieldsData.size() > 0) {
logger.debug(
"Adding changed field for pv " + name + " with " + changedarchiveFieldsData.size());
HashMap<String, String> tempHashMap = new HashMap<String, String>();
tempHashMap.putAll(changedarchiveFieldsData);
// dbrtimeevent.s
dbrtimeevent.setFieldValues(tempHashMap, true);
changedarchiveFieldsData.clear();
}
// //////////////////////////
// ////////////save all the fields once every day//////////////
if (this.lastTimeStampWhenSavingarchiveFields == null) {
if (allarchiveFieldsData.size() != 0) {
saveMetaDataOnceEveryDay();
}
} else {
Calendar currentCalendar = Calendar.getInstance();
currentCalendar.add(Calendar.DAY_OF_MONTH, -1);
if (currentCalendar.after(lastTimeStampWhenSavingarchiveFields)) {
// Calendar currentCalendar2=Calendar.getInstance();
saveMetaDataOnceEveryDay();
}
}
// //////////////////////////////
}
fireValueUpdate();
} catch (final Exception ex) {
logger.error("exception in monitor changed for pv " + this.name, ex);
}
}